Copying the email package back, despite its failings.

This commit is contained in:
Guido van Rossum 2007-08-30 01:15:14 +00:00
parent 21b731fb77
commit 8b3febef2f
75 changed files with 9910 additions and 0 deletions

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Lib/email/__init__.py Normal file
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# Copyright (C) 2001-2007 Python Software Foundation
# Author: Barry Warsaw
# Contact: email-sig@python.org
"""A package for parsing, handling, and generating email messages."""
__version__ = '5.0.0'
__all__ = [
'base64mime',
'charset',
'encoders',
'errors',
'generator',
'header',
'iterators',
'message',
'message_from_file',
'message_from_string',
'mime',
'parser',
'quoprimime',
'utils',
]
# Some convenience routines. Don't import Parser and Message as side-effects
# of importing email since those cascadingly import most of the rest of the
# email package.
def message_from_string(s, *args, **kws):
"""Parse a string into a Message object model.
Optional _class and strict are passed to the Parser constructor.
"""
from email.parser import Parser
return Parser(*args, **kws).parsestr(s)
def message_from_file(fp, *args, **kws):
"""Read a file and parse its contents into a Message object model.
Optional _class and strict are passed to the Parser constructor.
"""
from email.parser import Parser
return Parser(*args, **kws).parse(fp)

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# Copyright (C) 2002-2007 Python Software Foundation
# Contact: email-sig@python.org
"""Email address parsing code.
Lifted directly from rfc822.py. This should eventually be rewritten.
"""
__all__ = [
'mktime_tz',
'parsedate',
'parsedate_tz',
'quote',
]
import time
SPACE = ' '
EMPTYSTRING = ''
COMMASPACE = ', '
# Parse a date field
_monthnames = ['jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul',
'aug', 'sep', 'oct', 'nov', 'dec',
'january', 'february', 'march', 'april', 'may', 'june', 'july',
'august', 'september', 'october', 'november', 'december']
_daynames = ['mon', 'tue', 'wed', 'thu', 'fri', 'sat', 'sun']
# The timezone table does not include the military time zones defined
# in RFC822, other than Z. According to RFC1123, the description in
# RFC822 gets the signs wrong, so we can't rely on any such time
# zones. RFC1123 recommends that numeric timezone indicators be used
# instead of timezone names.
_timezones = {'UT':0, 'UTC':0, 'GMT':0, 'Z':0,
'AST': -400, 'ADT': -300, # Atlantic (used in Canada)
'EST': -500, 'EDT': -400, # Eastern
'CST': -600, 'CDT': -500, # Central
'MST': -700, 'MDT': -600, # Mountain
'PST': -800, 'PDT': -700 # Pacific
}
def parsedate_tz(data):
"""Convert a date string to a time tuple.
Accounts for military timezones.
"""
data = data.split()
# The FWS after the comma after the day-of-week is optional, so search and
# adjust for this.
if data[0].endswith(',') or data[0].lower() in _daynames:
# There's a dayname here. Skip it
del data[0]
else:
i = data[0].rfind(',')
if i >= 0:
data[0] = data[0][i+1:]
if len(data) == 3: # RFC 850 date, deprecated
stuff = data[0].split('-')
if len(stuff) == 3:
data = stuff + data[1:]
if len(data) == 4:
s = data[3]
i = s.find('+')
if i > 0:
data[3:] = [s[:i], s[i+1:]]
else:
data.append('') # Dummy tz
if len(data) < 5:
return None
data = data[:5]
[dd, mm, yy, tm, tz] = data
mm = mm.lower()
if mm not in _monthnames:
dd, mm = mm, dd.lower()
if mm not in _monthnames:
return None
mm = _monthnames.index(mm) + 1
if mm > 12:
mm -= 12
if dd[-1] == ',':
dd = dd[:-1]
i = yy.find(':')
if i > 0:
yy, tm = tm, yy
if yy[-1] == ',':
yy = yy[:-1]
if not yy[0].isdigit():
yy, tz = tz, yy
if tm[-1] == ',':
tm = tm[:-1]
tm = tm.split(':')
if len(tm) == 2:
[thh, tmm] = tm
tss = '0'
elif len(tm) == 3:
[thh, tmm, tss] = tm
else:
return None
try:
yy = int(yy)
dd = int(dd)
thh = int(thh)
tmm = int(tmm)
tss = int(tss)
except ValueError:
return None
tzoffset = None
tz = tz.upper()
if tz in _timezones:
tzoffset = _timezones[tz]
else:
try:
tzoffset = int(tz)
except ValueError:
pass
# Convert a timezone offset into seconds ; -0500 -> -18000
if tzoffset:
if tzoffset < 0:
tzsign = -1
tzoffset = -tzoffset
else:
tzsign = 1
tzoffset = tzsign * ( (tzoffset//100)*3600 + (tzoffset % 100)*60)
# Daylight Saving Time flag is set to -1, since DST is unknown.
return yy, mm, dd, thh, tmm, tss, 0, 1, -1, tzoffset
def parsedate(data):
"""Convert a time string to a time tuple."""
t = parsedate_tz(data)
if isinstance(t, tuple):
return t[:9]
else:
return t
def mktime_tz(data):
"""Turn a 10-tuple as returned by parsedate_tz() into a UTC timestamp."""
if data[9] is None:
# No zone info, so localtime is better assumption than GMT
return time.mktime(data[:8] + (-1,))
else:
t = time.mktime(data[:8] + (0,))
return t - data[9] - time.timezone
def quote(str):
"""Add quotes around a string."""
return str.replace('\\', '\\\\').replace('"', '\\"')
class AddrlistClass:
"""Address parser class by Ben Escoto.
To understand what this class does, it helps to have a copy of RFC 2822 in
front of you.
Note: this class interface is deprecated and may be removed in the future.
Use rfc822.AddressList instead.
"""
def __init__(self, field):
"""Initialize a new instance.
`field' is an unparsed address header field, containing
one or more addresses.
"""
self.specials = '()<>@,:;.\"[]'
self.pos = 0
self.LWS = ' \t'
self.CR = '\r\n'
self.FWS = self.LWS + self.CR
self.atomends = self.specials + self.LWS + self.CR
# Note that RFC 2822 now specifies `.' as obs-phrase, meaning that it
# is obsolete syntax. RFC 2822 requires that we recognize obsolete
# syntax, so allow dots in phrases.
self.phraseends = self.atomends.replace('.', '')
self.field = field
self.commentlist = []
def gotonext(self):
"""Parse up to the start of the next address."""
while self.pos < len(self.field):
if self.field[self.pos] in self.LWS + '\n\r':
self.pos += 1
elif self.field[self.pos] == '(':
self.commentlist.append(self.getcomment())
else:
break
def getaddrlist(self):
"""Parse all addresses.
Returns a list containing all of the addresses.
"""
result = []
while self.pos < len(self.field):
ad = self.getaddress()
if ad:
result += ad
else:
result.append(('', ''))
return result
def getaddress(self):
"""Parse the next address."""
self.commentlist = []
self.gotonext()
oldpos = self.pos
oldcl = self.commentlist
plist = self.getphraselist()
self.gotonext()
returnlist = []
if self.pos >= len(self.field):
# Bad email address technically, no domain.
if plist:
returnlist = [(SPACE.join(self.commentlist), plist[0])]
elif self.field[self.pos] in '.@':
# email address is just an addrspec
# this isn't very efficient since we start over
self.pos = oldpos
self.commentlist = oldcl
addrspec = self.getaddrspec()
returnlist = [(SPACE.join(self.commentlist), addrspec)]
elif self.field[self.pos] == ':':
# address is a group
returnlist = []
fieldlen = len(self.field)
self.pos += 1
while self.pos < len(self.field):
self.gotonext()
if self.pos < fieldlen and self.field[self.pos] == ';':
self.pos += 1
break
returnlist = returnlist + self.getaddress()
elif self.field[self.pos] == '<':
# Address is a phrase then a route addr
routeaddr = self.getrouteaddr()
if self.commentlist:
returnlist = [(SPACE.join(plist) + ' (' +
' '.join(self.commentlist) + ')', routeaddr)]
else:
returnlist = [(SPACE.join(plist), routeaddr)]
else:
if plist:
returnlist = [(SPACE.join(self.commentlist), plist[0])]
elif self.field[self.pos] in self.specials:
self.pos += 1
self.gotonext()
if self.pos < len(self.field) and self.field[self.pos] == ',':
self.pos += 1
return returnlist
def getrouteaddr(self):
"""Parse a route address (Return-path value).
This method just skips all the route stuff and returns the addrspec.
"""
if self.field[self.pos] != '<':
return
expectroute = False
self.pos += 1
self.gotonext()
adlist = ''
while self.pos < len(self.field):
if expectroute:
self.getdomain()
expectroute = False
elif self.field[self.pos] == '>':
self.pos += 1
break
elif self.field[self.pos] == '@':
self.pos += 1
expectroute = True
elif self.field[self.pos] == ':':
self.pos += 1
else:
adlist = self.getaddrspec()
self.pos += 1
break
self.gotonext()
return adlist
def getaddrspec(self):
"""Parse an RFC 2822 addr-spec."""
aslist = []
self.gotonext()
while self.pos < len(self.field):
if self.field[self.pos] == '.':
aslist.append('.')
self.pos += 1
elif self.field[self.pos] == '"':
aslist.append('"%s"' % self.getquote())
elif self.field[self.pos] in self.atomends:
break
else:
aslist.append(self.getatom())
self.gotonext()
if self.pos >= len(self.field) or self.field[self.pos] != '@':
return EMPTYSTRING.join(aslist)
aslist.append('@')
self.pos += 1
self.gotonext()
return EMPTYSTRING.join(aslist) + self.getdomain()
def getdomain(self):
"""Get the complete domain name from an address."""
sdlist = []
while self.pos < len(self.field):
if self.field[self.pos] in self.LWS:
self.pos += 1
elif self.field[self.pos] == '(':
self.commentlist.append(self.getcomment())
elif self.field[self.pos] == '[':
sdlist.append(self.getdomainliteral())
elif self.field[self.pos] == '.':
self.pos += 1
sdlist.append('.')
elif self.field[self.pos] in self.atomends:
break
else:
sdlist.append(self.getatom())
return EMPTYSTRING.join(sdlist)
def getdelimited(self, beginchar, endchars, allowcomments=True):
"""Parse a header fragment delimited by special characters.
`beginchar' is the start character for the fragment.
If self is not looking at an instance of `beginchar' then
getdelimited returns the empty string.
`endchars' is a sequence of allowable end-delimiting characters.
Parsing stops when one of these is encountered.
If `allowcomments' is non-zero, embedded RFC 2822 comments are allowed
within the parsed fragment.
"""
if self.field[self.pos] != beginchar:
return ''
slist = ['']
quote = False
self.pos += 1
while self.pos < len(self.field):
if quote:
slist.append(self.field[self.pos])
quote = False
elif self.field[self.pos] in endchars:
self.pos += 1
break
elif allowcomments and self.field[self.pos] == '(':
slist.append(self.getcomment())
continue # have already advanced pos from getcomment
elif self.field[self.pos] == '\\':
quote = True
else:
slist.append(self.field[self.pos])
self.pos += 1
return EMPTYSTRING.join(slist)
def getquote(self):
"""Get a quote-delimited fragment from self's field."""
return self.getdelimited('"', '"\r', False)
def getcomment(self):
"""Get a parenthesis-delimited fragment from self's field."""
return self.getdelimited('(', ')\r', True)
def getdomainliteral(self):
"""Parse an RFC 2822 domain-literal."""
return '[%s]' % self.getdelimited('[', ']\r', False)
def getatom(self, atomends=None):
"""Parse an RFC 2822 atom.
Optional atomends specifies a different set of end token delimiters
(the default is to use self.atomends). This is used e.g. in
getphraselist() since phrase endings must not include the `.' (which
is legal in phrases)."""
atomlist = ['']
if atomends is None:
atomends = self.atomends
while self.pos < len(self.field):
if self.field[self.pos] in atomends:
break
else:
atomlist.append(self.field[self.pos])
self.pos += 1
return EMPTYSTRING.join(atomlist)
def getphraselist(self):
"""Parse a sequence of RFC 2822 phrases.
A phrase is a sequence of words, which are in turn either RFC 2822
atoms or quoted-strings. Phrases are canonicalized by squeezing all
runs of continuous whitespace into one space.
"""
plist = []
while self.pos < len(self.field):
if self.field[self.pos] in self.FWS:
self.pos += 1
elif self.field[self.pos] == '"':
plist.append(self.getquote())
elif self.field[self.pos] == '(':
self.commentlist.append(self.getcomment())
elif self.field[self.pos] in self.phraseends:
break
else:
plist.append(self.getatom(self.phraseends))
return plist
class AddressList(AddrlistClass):
"""An AddressList encapsulates a list of parsed RFC 2822 addresses."""
def __init__(self, field):
AddrlistClass.__init__(self, field)
if field:
self.addresslist = self.getaddrlist()
else:
self.addresslist = []
def __len__(self):
return len(self.addresslist)
def __add__(self, other):
# Set union
newaddr = AddressList(None)
newaddr.addresslist = self.addresslist[:]
for x in other.addresslist:
if not x in self.addresslist:
newaddr.addresslist.append(x)
return newaddr
def __iadd__(self, other):
# Set union, in-place
for x in other.addresslist:
if not x in self.addresslist:
self.addresslist.append(x)
return self
def __sub__(self, other):
# Set difference
newaddr = AddressList(None)
for x in self.addresslist:
if not x in other.addresslist:
newaddr.addresslist.append(x)
return newaddr
def __isub__(self, other):
# Set difference, in-place
for x in other.addresslist:
if x in self.addresslist:
self.addresslist.remove(x)
return self
def __getitem__(self, index):
# Make indexing, slices, and 'in' work
return self.addresslist[index]

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# Copyright (C) 2002-2007 Python Software Foundation
# Author: Ben Gertzfield
# Contact: email-sig@python.org
"""Base64 content transfer encoding per RFCs 2045-2047.
This module handles the content transfer encoding method defined in RFC 2045
to encode arbitrary 8-bit data using the three 8-bit bytes in four 7-bit
characters encoding known as Base64.
It is used in the MIME standards for email to attach images, audio, and text
using some 8-bit character sets to messages.
This module provides an interface to encode and decode both headers and bodies
with Base64 encoding.
RFC 2045 defines a method for including character set information in an
`encoded-word' in a header. This method is commonly used for 8-bit real names
in To:, From:, Cc:, etc. fields, as well as Subject: lines.
This module does not do the line wrapping or end-of-line character conversion
necessary for proper internationalized headers; it only does dumb encoding and
decoding. To deal with the various line wrapping issues, use the email.Header
module.
"""
__all__ = [
'base64_len',
'body_decode',
'body_encode',
'decode',
'decodestring',
'encode',
'encodestring',
'header_encode',
]
import re
from binascii import b2a_base64, a2b_base64
from email.utils import fix_eols
CRLF = '\r\n'
NL = '\n'
EMPTYSTRING = ''
# See also Charset.py
MISC_LEN = 7
# Helpers
def base64_len(s):
"""Return the length of s when it is encoded with base64."""
groups_of_3, leftover = divmod(len(s), 3)
# 4 bytes out for each 3 bytes (or nonzero fraction thereof) in.
# Thanks, Tim!
n = groups_of_3 * 4
if leftover:
n += 4
return n
def header_encode(header, charset='iso-8859-1', keep_eols=False,
maxlinelen=76, eol=NL):
"""Encode a single header line with Base64 encoding in a given charset.
Defined in RFC 2045, this Base64 encoding is identical to normal Base64
encoding, except that each line must be intelligently wrapped (respecting
the Base64 encoding), and subsequent lines must start with a space.
charset names the character set to use to encode the header. It defaults
to iso-8859-1.
End-of-line characters (\\r, \\n, \\r\\n) will be automatically converted
to the canonical email line separator \\r\\n unless the keep_eols
parameter is True (the default is False).
Each line of the header will be terminated in the value of eol, which
defaults to "\\n". Set this to "\\r\\n" if you are using the result of
this function directly in email.
The resulting string will be in the form:
"=?charset?b?WW/5ciBtYXp66XLrIHf8eiBhIGhhbXBzdGHuciBBIFlv+XIgbWF6euly?=\\n
=?charset?b?6yB3/HogYSBoYW1wc3Rh7nIgQkMgWW/5ciBtYXp66XLrIHf8eiBhIGhh?="
with each line wrapped at, at most, maxlinelen characters (defaults to 76
characters).
"""
# Return empty headers unchanged
if not header:
return header
if not keep_eols:
header = fix_eols(header)
# Base64 encode each line, in encoded chunks no greater than maxlinelen in
# length, after the RFC chrome is added in.
base64ed = []
max_encoded = maxlinelen - len(charset) - MISC_LEN
max_unencoded = max_encoded * 3 // 4
for i in range(0, len(header), max_unencoded):
base64ed.append(b2a_base64(header[i:i+max_unencoded]))
# Now add the RFC chrome to each encoded chunk
lines = []
for line in base64ed:
# Ignore the last character of each line if it is a newline
if line.endswith(NL):
line = line[:-1]
# Add the chrome
lines.append('=?%s?b?%s?=' % (charset, line))
# Glue the lines together and return it. BAW: should we be able to
# specify the leading whitespace in the joiner?
joiner = eol + ' '
return joiner.join(lines)
def encode(s, binary=True, maxlinelen=76, eol=NL):
"""Encode a string with base64.
Each line will be wrapped at, at most, maxlinelen characters (defaults to
76 characters).
If binary is False, end-of-line characters will be converted to the
canonical email end-of-line sequence \\r\\n. Otherwise they will be left
verbatim (this is the default).
Each line of encoded text will end with eol, which defaults to "\\n". Set
this to "\r\n" if you will be using the result of this function directly
in an email.
"""
if not s:
return s
if not binary:
s = fix_eols(s)
encvec = []
max_unencoded = maxlinelen * 3 // 4
for i in range(0, len(s), max_unencoded):
# BAW: should encode() inherit b2a_base64()'s dubious behavior in
# adding a newline to the encoded string?
enc = str(b2a_base64(s[i:i + max_unencoded]))
if enc.endswith(NL) and eol != NL:
enc = enc[:-1] + eol
encvec.append(enc)
return EMPTYSTRING.join(encvec)
# For convenience and backwards compatibility w/ standard base64 module
body_encode = encode
encodestring = encode
def decode(s, convert_eols=False):
"""Decode a raw base64 string, returning a bytes object.
If convert_eols is set to a string value, all canonical email linefeeds,
e.g. "\\r\\n", in the decoded text will be converted to the value of
convert_eols. os.linesep is a good choice for convert_eols if you are
decoding a text attachment.
This function does not parse a full MIME header value encoded with
base64 (like =?iso-8895-1?b?bmloISBuaWgh?=) -- please use the high
level email.Header class for that functionality.
"""
if not s:
return s
dec = a2b_base64(s)
if convert_eols:
return dec.replace(CRLF, convert_eols)
return dec
# For convenience and backwards compatibility w/ standard base64 module
body_decode = decode
decodestring = decode

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# Copyright (C) 2001-2007 Python Software Foundation
# Author: Ben Gertzfield, Barry Warsaw
# Contact: email-sig@python.org
__all__ = [
'Charset',
'add_alias',
'add_charset',
'add_codec',
]
import email.base64mime
import email.quoprimime
from email import errors
from email.encoders import encode_7or8bit
# Flags for types of header encodings
QP = 1 # Quoted-Printable
BASE64 = 2 # Base64
SHORTEST = 3 # the shorter of QP and base64, but only for headers
# In "=?charset?q?hello_world?=", the =?, ?q?, and ?= add up to 7
MISC_LEN = 7
DEFAULT_CHARSET = 'us-ascii'
# Defaults
CHARSETS = {
# input header enc body enc output conv
'iso-8859-1': (QP, QP, None),
'iso-8859-2': (QP, QP, None),
'iso-8859-3': (QP, QP, None),
'iso-8859-4': (QP, QP, None),
# iso-8859-5 is Cyrillic, and not especially used
# iso-8859-6 is Arabic, also not particularly used
# iso-8859-7 is Greek, QP will not make it readable
# iso-8859-8 is Hebrew, QP will not make it readable
'iso-8859-9': (QP, QP, None),
'iso-8859-10': (QP, QP, None),
# iso-8859-11 is Thai, QP will not make it readable
'iso-8859-13': (QP, QP, None),
'iso-8859-14': (QP, QP, None),
'iso-8859-15': (QP, QP, None),
'iso-8859-16': (QP, QP, None),
'windows-1252':(QP, QP, None),
'viscii': (QP, QP, None),
'us-ascii': (None, None, None),
'big5': (BASE64, BASE64, None),
'gb2312': (BASE64, BASE64, None),
'euc-jp': (BASE64, None, 'iso-2022-jp'),
'shift_jis': (BASE64, None, 'iso-2022-jp'),
'iso-2022-jp': (BASE64, None, None),
'koi8-r': (BASE64, BASE64, None),
'utf-8': (SHORTEST, BASE64, 'utf-8'),
}
# Aliases for other commonly-used names for character sets. Map
# them to the real ones used in email.
ALIASES = {
'latin_1': 'iso-8859-1',
'latin-1': 'iso-8859-1',
'latin_2': 'iso-8859-2',
'latin-2': 'iso-8859-2',
'latin_3': 'iso-8859-3',
'latin-3': 'iso-8859-3',
'latin_4': 'iso-8859-4',
'latin-4': 'iso-8859-4',
'latin_5': 'iso-8859-9',
'latin-5': 'iso-8859-9',
'latin_6': 'iso-8859-10',
'latin-6': 'iso-8859-10',
'latin_7': 'iso-8859-13',
'latin-7': 'iso-8859-13',
'latin_8': 'iso-8859-14',
'latin-8': 'iso-8859-14',
'latin_9': 'iso-8859-15',
'latin-9': 'iso-8859-15',
'latin_10':'iso-8859-16',
'latin-10':'iso-8859-16',
'cp949': 'ks_c_5601-1987',
'euc_jp': 'euc-jp',
'euc_kr': 'euc-kr',
'ascii': 'us-ascii',
}
# Map charsets to their Unicode codec strings.
CODEC_MAP = {
'gb2312': 'eucgb2312_cn',
'big5': 'big5_tw',
# Hack: We don't want *any* conversion for stuff marked us-ascii, as all
# sorts of garbage might be sent to us in the guise of 7-bit us-ascii.
# Let that stuff pass through without conversion to/from Unicode.
'us-ascii': None,
}
# Convenience functions for extending the above mappings
def add_charset(charset, header_enc=None, body_enc=None, output_charset=None):
"""Add character set properties to the global registry.
charset is the input character set, and must be the canonical name of a
character set.
Optional header_enc and body_enc is either Charset.QP for
quoted-printable, Charset.BASE64 for base64 encoding, Charset.SHORTEST for
the shortest of qp or base64 encoding, or None for no encoding. SHORTEST
is only valid for header_enc. It describes how message headers and
message bodies in the input charset are to be encoded. Default is no
encoding.
Optional output_charset is the character set that the output should be
in. Conversions will proceed from input charset, to Unicode, to the
output charset when the method Charset.convert() is called. The default
is to output in the same character set as the input.
Both input_charset and output_charset must have Unicode codec entries in
the module's charset-to-codec mapping; use add_codec(charset, codecname)
to add codecs the module does not know about. See the codecs module's
documentation for more information.
"""
if body_enc == SHORTEST:
raise ValueError('SHORTEST not allowed for body_enc')
CHARSETS[charset] = (header_enc, body_enc, output_charset)
def add_alias(alias, canonical):
"""Add a character set alias.
alias is the alias name, e.g. latin-1
canonical is the character set's canonical name, e.g. iso-8859-1
"""
ALIASES[alias] = canonical
def add_codec(charset, codecname):
"""Add a codec that map characters in the given charset to/from Unicode.
charset is the canonical name of a character set. codecname is the name
of a Python codec, as appropriate for the second argument to the unicode()
built-in, or to the encode() method of a Unicode string.
"""
CODEC_MAP[charset] = codecname
class Charset:
"""Map character sets to their email properties.
This class provides information about the requirements imposed on email
for a specific character set. It also provides convenience routines for
converting between character sets, given the availability of the
applicable codecs. Given a character set, it will do its best to provide
information on how to use that character set in an email in an
RFC-compliant way.
Certain character sets must be encoded with quoted-printable or base64
when used in email headers or bodies. Certain character sets must be
converted outright, and are not allowed in email. Instances of this
module expose the following information about a character set:
input_charset: The initial character set specified. Common aliases
are converted to their `official' email names (e.g. latin_1
is converted to iso-8859-1). Defaults to 7-bit us-ascii.
header_encoding: If the character set must be encoded before it can be
used in an email header, this attribute will be set to
Charset.QP (for quoted-printable), Charset.BASE64 (for
base64 encoding), or Charset.SHORTEST for the shortest of
QP or BASE64 encoding. Otherwise, it will be None.
body_encoding: Same as header_encoding, but describes the encoding for the
mail message's body, which indeed may be different than the
header encoding. Charset.SHORTEST is not allowed for
body_encoding.
output_charset: Some character sets must be converted before the can be
used in email headers or bodies. If the input_charset is
one of them, this attribute will contain the name of the
charset output will be converted to. Otherwise, it will
be None.
input_codec: The name of the Python codec used to convert the
input_charset to Unicode. If no conversion codec is
necessary, this attribute will be None.
output_codec: The name of the Python codec used to convert Unicode
to the output_charset. If no conversion codec is necessary,
this attribute will have the same value as the input_codec.
"""
def __init__(self, input_charset=DEFAULT_CHARSET):
# RFC 2046, $4.1.2 says charsets are not case sensitive. We coerce to
# unicode because its .lower() is locale insensitive. If the argument
# is already a unicode, we leave it at that, but ensure that the
# charset is ASCII, as the standard (RFC XXX) requires.
try:
if isinstance(input_charset, str):
input_charset.encode('ascii')
else:
input_charset = str(input_charset, 'ascii')
except UnicodeError:
raise errors.CharsetError(input_charset)
input_charset = input_charset.lower()
# Set the input charset after filtering through the aliases
self.input_charset = ALIASES.get(input_charset, input_charset)
# We can try to guess which encoding and conversion to use by the
# charset_map dictionary. Try that first, but let the user override
# it.
henc, benc, conv = CHARSETS.get(self.input_charset,
(SHORTEST, BASE64, None))
if not conv:
conv = self.input_charset
# Set the attributes, allowing the arguments to override the default.
self.header_encoding = henc
self.body_encoding = benc
self.output_charset = ALIASES.get(conv, conv)
# Now set the codecs. If one isn't defined for input_charset,
# guess and try a Unicode codec with the same name as input_codec.
self.input_codec = CODEC_MAP.get(self.input_charset,
self.input_charset)
self.output_codec = CODEC_MAP.get(self.output_charset,
self.output_charset)
def __str__(self):
return self.input_charset.lower()
__repr__ = __str__
def __eq__(self, other):
return str(self) == str(other).lower()
def __ne__(self, other):
return not self.__eq__(other)
def get_body_encoding(self):
"""Return the content-transfer-encoding used for body encoding.
This is either the string `quoted-printable' or `base64' depending on
the encoding used, or it is a function in which case you should call
the function with a single argument, the Message object being
encoded. The function should then set the Content-Transfer-Encoding
header itself to whatever is appropriate.
Returns "quoted-printable" if self.body_encoding is QP.
Returns "base64" if self.body_encoding is BASE64.
Returns "7bit" otherwise.
"""
assert self.body_encoding != SHORTEST
if self.body_encoding == QP:
return 'quoted-printable'
elif self.body_encoding == BASE64:
return 'base64'
else:
return encode_7or8bit
def convert(self, s):
"""Convert a string from the input_codec to the output_codec."""
if self.input_codec != self.output_codec:
rawbytes = bytes(ord(c) for c in s)
decoded = rawbytes.decode(self.input_codec)
encoded = decoded.encode(self.output_codec)
return str(encoded)
else:
return s
def to_splittable(self, s):
"""Convert a possibly multibyte string to a safely splittable format.
Uses the input_codec to try and convert the string to Unicode, so it
can be safely split on character boundaries (even for multibyte
characters).
Returns the string as-is if it isn't known how to convert it to
Unicode with the input_charset.
Characters that could not be converted to Unicode will be replaced
with the Unicode replacement character U+FFFD.
"""
if isinstance(s, str) or self.input_codec is None:
return s
try:
return str(s, self.input_codec, 'replace')
except LookupError:
# Input codec not installed on system, so return the original
# string unchanged.
return s
def from_splittable(self, ustr, to_output=True):
"""Convert a splittable string back into an encoded string.
Uses the proper codec to try and convert the string from Unicode back
into an encoded format. Return the string as-is if it is not Unicode,
or if it could not be converted from Unicode.
Characters that could not be converted from Unicode will be replaced
with an appropriate character (usually '?').
If to_output is True (the default), uses output_codec to convert to an
encoded format. If to_output is False, uses input_codec.
"""
if to_output:
codec = self.output_codec
else:
codec = self.input_codec
if not isinstance(ustr, str) or codec is None:
return ustr
try:
return str(ustr.encode(codec, 'replace'))
except LookupError:
# Output codec not installed
return ustr
def get_output_charset(self):
"""Return the output character set.
This is self.output_charset if that is not None, otherwise it is
self.input_charset.
"""
return self.output_charset or self.input_charset
def encoded_header_len(self, s):
"""Return the length of the encoded header string."""
cset = self.get_output_charset()
# The len(s) of a 7bit encoding is len(s)
if self.header_encoding == BASE64:
return email.base64mime.base64_len(s) + len(cset) + MISC_LEN
elif self.header_encoding == QP:
return email.quoprimime.header_quopri_len(s) + len(cset) + MISC_LEN
elif self.header_encoding == SHORTEST:
lenb64 = email.base64mime.base64_len(s)
lenqp = email.quoprimime.header_quopri_len(s)
return min(lenb64, lenqp) + len(cset) + MISC_LEN
else:
return len(s)
def header_encode(self, string):
"""Header-encode a string by converting it first to bytes.
:param string: A unicode string for the header. This must be
encodable to bytes using the current character set's `output_codec`.
The type of encoding (base64 or quoted-printable) will be based on
this charset's `header_encoding`.
"""
codec = self.output_codec or 'us-ascii'
charset = self.get_output_charset()
header_bytes = string.encode(codec)
# 7bit/8bit encodings return the string unchanged (modulo conversions)
if self.header_encoding == BASE64:
encoder = email.base64mime.header_encode
elif self.header_encoding == QP:
encoder = email.quoprimime.header_encode
elif self.header_encoding == SHORTEST:
lenb64 = email.base64mime.base64_len(header_bytes)
lenqp = email.quoprimime.header_quopri_len(header_bytes)
if lenb64 < lenqp:
encoder = email.base64mime.header_encode
else:
encoder = email.quoprimime.header_encode
else:
return string
return encoder(header_bytes, codec)
def body_encode(self, s, convert=True):
"""Body-encode a string and convert it to output_charset.
If convert is True (the default), the string will be converted from
the input charset to output charset automatically. Unlike
header_encode(), there are no issues with byte boundaries and
multibyte charsets in email bodies, so this is usually pretty safe.
The type of encoding (base64 or quoted-printable) will be based on
self.body_encoding.
"""
if convert:
s = self.convert(s)
# 7bit/8bit encodings return the string unchanged (module conversions)
if self.body_encoding is BASE64:
return email.base64mime.body_encode(s)
elif self.body_encoding is QP:
return email.quoprimime.body_encode(s)
else:
return s

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# Copyright (C) 2001-2006 Python Software Foundation
# Author: Barry Warsaw
# Contact: email-sig@python.org
"""Encodings and related functions."""
__all__ = [
'encode_7or8bit',
'encode_base64',
'encode_noop',
'encode_quopri',
]
import base64
from quopri import encodestring as _encodestring
def _qencode(s):
enc = _encodestring(s, quotetabs=True)
# Must encode spaces, which quopri.encodestring() doesn't do
return enc.replace(' ', '=20')
def _bencode(s):
# We can't quite use base64.encodestring() since it tacks on a "courtesy
# newline". Blech!
if not s:
return s
hasnewline = (s[-1] == '\n')
value = base64.encodestring(s)
if not hasnewline and value[-1] == '\n':
return value[:-1]
return value
def encode_base64(msg):
"""Encode the message's payload in Base64.
Also, add an appropriate Content-Transfer-Encoding header.
"""
orig = msg.get_payload()
encdata = _bencode(orig)
msg.set_payload(encdata)
msg['Content-Transfer-Encoding'] = 'base64'
def encode_quopri(msg):
"""Encode the message's payload in quoted-printable.
Also, add an appropriate Content-Transfer-Encoding header.
"""
orig = msg.get_payload()
encdata = _qencode(orig)
msg.set_payload(encdata)
msg['Content-Transfer-Encoding'] = 'quoted-printable'
def encode_7or8bit(msg):
"""Set the Content-Transfer-Encoding header to 7bit or 8bit."""
orig = msg.get_payload()
if orig is None:
# There's no payload. For backwards compatibility we use 7bit
msg['Content-Transfer-Encoding'] = '7bit'
return
# We play a trick to make this go fast. If encoding to ASCII succeeds, we
# know the data must be 7bit, otherwise treat it as 8bit.
try:
orig.encode('ascii')
except UnicodeError:
# iso-2022-* is non-ASCII but still 7-bit
charset = msg.get_charset()
output_cset = charset and charset.output_charset
if output_cset and output_cset.lower().startswith('iso-2202-'):
msg['Content-Transfer-Encoding'] = '7bit'
else:
msg['Content-Transfer-Encoding'] = '8bit'
else:
msg['Content-Transfer-Encoding'] = '7bit'
def encode_noop(msg):
"""Do nothing."""

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# Copyright (C) 2001-2006 Python Software Foundation
# Author: Barry Warsaw
# Contact: email-sig@python.org
"""email package exception classes."""
class MessageError(Exception):
"""Base class for errors in the email package."""
class MessageParseError(MessageError):
"""Base class for message parsing errors."""
class HeaderParseError(MessageParseError):
"""Error while parsing headers."""
class BoundaryError(MessageParseError):
"""Couldn't find terminating boundary."""
class MultipartConversionError(MessageError, TypeError):
"""Conversion to a multipart is prohibited."""
class CharsetError(MessageError):
"""An illegal charset was given."""
# These are parsing defects which the parser was able to work around.
class MessageDefect:
"""Base class for a message defect."""
def __init__(self, line=None):
self.line = line
class NoBoundaryInMultipartDefect(MessageDefect):
"""A message claimed to be a multipart but had no boundary parameter."""
class StartBoundaryNotFoundDefect(MessageDefect):
"""The claimed start boundary was never found."""
class FirstHeaderLineIsContinuationDefect(MessageDefect):
"""A message had a continuation line as its first header line."""
class MisplacedEnvelopeHeaderDefect(MessageDefect):
"""A 'Unix-from' header was found in the middle of a header block."""
class MalformedHeaderDefect(MessageDefect):
"""Found a header that was missing a colon, or was otherwise malformed."""
class MultipartInvariantViolationDefect(MessageDefect):
"""A message claimed to be a multipart but no subparts were found."""

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# Copyright (C) 2004-2006 Python Software Foundation
# Authors: Baxter, Wouters and Warsaw
# Contact: email-sig@python.org
"""FeedParser - An email feed parser.
The feed parser implements an interface for incrementally parsing an email
message, line by line. This has advantages for certain applications, such as
those reading email messages off a socket.
FeedParser.feed() is the primary interface for pushing new data into the
parser. It returns when there's nothing more it can do with the available
data. When you have no more data to push into the parser, call .close().
This completes the parsing and returns the root message object.
The other advantage of this parser is that it will never throw a parsing
exception. Instead, when it finds something unexpected, it adds a 'defect' to
the current message. Defects are just instances that live on the message
object's .defects attribute.
"""
__all__ = ['FeedParser']
import re
from email import errors
from email import message
NLCRE = re.compile('\r\n|\r|\n')
NLCRE_bol = re.compile('(\r\n|\r|\n)')
NLCRE_eol = re.compile('(\r\n|\r|\n)$')
NLCRE_crack = re.compile('(\r\n|\r|\n)')
# RFC 2822 $3.6.8 Optional fields. ftext is %d33-57 / %d59-126, Any character
# except controls, SP, and ":".
headerRE = re.compile(r'^(From |[\041-\071\073-\176]{1,}:|[\t ])')
EMPTYSTRING = ''
NL = '\n'
NeedMoreData = object()
class BufferedSubFile(object):
"""A file-ish object that can have new data loaded into it.
You can also push and pop line-matching predicates onto a stack. When the
current predicate matches the current line, a false EOF response
(i.e. empty string) is returned instead. This lets the parser adhere to a
simple abstraction -- it parses until EOF closes the current message.
"""
def __init__(self):
# The last partial line pushed into this object.
self._partial = ''
# The list of full, pushed lines, in reverse order
self._lines = []
# The stack of false-EOF checking predicates.
self._eofstack = []
# A flag indicating whether the file has been closed or not.
self._closed = False
def push_eof_matcher(self, pred):
self._eofstack.append(pred)
def pop_eof_matcher(self):
return self._eofstack.pop()
def close(self):
# Don't forget any trailing partial line.
self._lines.append(self._partial)
self._partial = ''
self._closed = True
def readline(self):
if not self._lines:
if self._closed:
return ''
return NeedMoreData
# Pop the line off the stack and see if it matches the current
# false-EOF predicate.
line = self._lines.pop()
# RFC 2046, section 5.1.2 requires us to recognize outer level
# boundaries at any level of inner nesting. Do this, but be sure it's
# in the order of most to least nested.
for ateof in self._eofstack[::-1]:
if ateof(line):
# We're at the false EOF. But push the last line back first.
self._lines.append(line)
return ''
return line
def unreadline(self, line):
# Let the consumer push a line back into the buffer.
assert line is not NeedMoreData
self._lines.append(line)
def push(self, data):
"""Push some new data into this object."""
# Handle any previous leftovers
data, self._partial = self._partial + data, ''
# Crack into lines, but preserve the newlines on the end of each
parts = NLCRE_crack.split(data)
# The *ahem* interesting behaviour of re.split when supplied grouping
# parentheses is that the last element of the resulting list is the
# data after the final RE. In the case of a NL/CR terminated string,
# this is the empty string.
self._partial = parts.pop()
# parts is a list of strings, alternating between the line contents
# and the eol character(s). Gather up a list of lines after
# re-attaching the newlines.
lines = []
for i in range(len(parts) // 2):
lines.append(parts[i*2] + parts[i*2+1])
self.pushlines(lines)
def pushlines(self, lines):
# Reverse and insert at the front of the lines.
self._lines[:0] = lines[::-1]
def is_closed(self):
return self._closed
def __iter__(self):
return self
def __next__(self):
line = self.readline()
if line == '':
raise StopIteration
return line
class FeedParser:
"""A feed-style parser of email."""
def __init__(self, _factory=message.Message):
"""_factory is called with no arguments to create a new message obj"""
self._factory = _factory
self._input = BufferedSubFile()
self._msgstack = []
self._parse = self._parsegen().__next__
self._cur = None
self._last = None
self._headersonly = False
# Non-public interface for supporting Parser's headersonly flag
def _set_headersonly(self):
self._headersonly = True
def feed(self, data):
"""Push more data into the parser."""
self._input.push(data)
self._call_parse()
def _call_parse(self):
try:
self._parse()
except StopIteration:
pass
def close(self):
"""Parse all remaining data and return the root message object."""
self._input.close()
self._call_parse()
root = self._pop_message()
assert not self._msgstack
# Look for final set of defects
if root.get_content_maintype() == 'multipart' \
and not root.is_multipart():
root.defects.append(errors.MultipartInvariantViolationDefect())
return root
def _new_message(self):
msg = self._factory()
if self._cur and self._cur.get_content_type() == 'multipart/digest':
msg.set_default_type('message/rfc822')
if self._msgstack:
self._msgstack[-1].attach(msg)
self._msgstack.append(msg)
self._cur = msg
self._last = msg
def _pop_message(self):
retval = self._msgstack.pop()
if self._msgstack:
self._cur = self._msgstack[-1]
else:
self._cur = None
return retval
def _parsegen(self):
# Create a new message and start by parsing headers.
self._new_message()
headers = []
# Collect the headers, searching for a line that doesn't match the RFC
# 2822 header or continuation pattern (including an empty line).
for line in self._input:
if line is NeedMoreData:
yield NeedMoreData
continue
if not headerRE.match(line):
# If we saw the RFC defined header/body separator
# (i.e. newline), just throw it away. Otherwise the line is
# part of the body so push it back.
if not NLCRE.match(line):
self._input.unreadline(line)
break
headers.append(line)
# Done with the headers, so parse them and figure out what we're
# supposed to see in the body of the message.
self._parse_headers(headers)
# Headers-only parsing is a backwards compatibility hack, which was
# necessary in the older parser, which could throw errors. All
# remaining lines in the input are thrown into the message body.
if self._headersonly:
lines = []
while True:
line = self._input.readline()
if line is NeedMoreData:
yield NeedMoreData
continue
if line == '':
break
lines.append(line)
self._cur.set_payload(EMPTYSTRING.join(lines))
return
if self._cur.get_content_type() == 'message/delivery-status':
# message/delivery-status contains blocks of headers separated by
# a blank line. We'll represent each header block as a separate
# nested message object, but the processing is a bit different
# than standard message/* types because there is no body for the
# nested messages. A blank line separates the subparts.
while True:
self._input.push_eof_matcher(NLCRE.match)
for retval in self._parsegen():
if retval is NeedMoreData:
yield NeedMoreData
continue
break
msg = self._pop_message()
# We need to pop the EOF matcher in order to tell if we're at
# the end of the current file, not the end of the last block
# of message headers.
self._input.pop_eof_matcher()
# The input stream must be sitting at the newline or at the
# EOF. We want to see if we're at the end of this subpart, so
# first consume the blank line, then test the next line to see
# if we're at this subpart's EOF.
while True:
line = self._input.readline()
if line is NeedMoreData:
yield NeedMoreData
continue
break
while True:
line = self._input.readline()
if line is NeedMoreData:
yield NeedMoreData
continue
break
if line == '':
break
# Not at EOF so this is a line we're going to need.
self._input.unreadline(line)
return
if self._cur.get_content_maintype() == 'message':
# The message claims to be a message/* type, then what follows is
# another RFC 2822 message.
for retval in self._parsegen():
if retval is NeedMoreData:
yield NeedMoreData
continue
break
self._pop_message()
return
if self._cur.get_content_maintype() == 'multipart':
boundary = self._cur.get_boundary()
if boundary is None:
# The message /claims/ to be a multipart but it has not
# defined a boundary. That's a problem which we'll handle by
# reading everything until the EOF and marking the message as
# defective.
self._cur.defects.append(errors.NoBoundaryInMultipartDefect())
lines = []
for line in self._input:
if line is NeedMoreData:
yield NeedMoreData
continue
lines.append(line)
self._cur.set_payload(EMPTYSTRING.join(lines))
return
# Create a line match predicate which matches the inter-part
# boundary as well as the end-of-multipart boundary. Don't push
# this onto the input stream until we've scanned past the
# preamble.
separator = '--' + boundary
boundaryre = re.compile(
'(?P<sep>' + re.escape(separator) +
r')(?P<end>--)?(?P<ws>[ \t]*)(?P<linesep>\r\n|\r|\n)?$')
capturing_preamble = True
preamble = []
linesep = False
while True:
line = self._input.readline()
if line is NeedMoreData:
yield NeedMoreData
continue
if line == '':
break
mo = boundaryre.match(line)
if mo:
# If we're looking at the end boundary, we're done with
# this multipart. If there was a newline at the end of
# the closing boundary, then we need to initialize the
# epilogue with the empty string (see below).
if mo.group('end'):
linesep = mo.group('linesep')
break
# We saw an inter-part boundary. Were we in the preamble?
if capturing_preamble:
if preamble:
# According to RFC 2046, the last newline belongs
# to the boundary.
lastline = preamble[-1]
eolmo = NLCRE_eol.search(lastline)
if eolmo:
preamble[-1] = lastline[:-len(eolmo.group(0))]
self._cur.preamble = EMPTYSTRING.join(preamble)
capturing_preamble = False
self._input.unreadline(line)
continue
# We saw a boundary separating two parts. Consume any
# multiple boundary lines that may be following. Our
# interpretation of RFC 2046 BNF grammar does not produce
# body parts within such double boundaries.
while True:
line = self._input.readline()
if line is NeedMoreData:
yield NeedMoreData
continue
mo = boundaryre.match(line)
if not mo:
self._input.unreadline(line)
break
# Recurse to parse this subpart; the input stream points
# at the subpart's first line.
self._input.push_eof_matcher(boundaryre.match)
for retval in self._parsegen():
if retval is NeedMoreData:
yield NeedMoreData
continue
break
# Because of RFC 2046, the newline preceding the boundary
# separator actually belongs to the boundary, not the
# previous subpart's payload (or epilogue if the previous
# part is a multipart).
if self._last.get_content_maintype() == 'multipart':
epilogue = self._last.epilogue
if epilogue == '':
self._last.epilogue = None
elif epilogue is not None:
mo = NLCRE_eol.search(epilogue)
if mo:
end = len(mo.group(0))
self._last.epilogue = epilogue[:-end]
else:
payload = self._last.get_payload()
if isinstance(payload, basestring):
mo = NLCRE_eol.search(payload)
if mo:
payload = payload[:-len(mo.group(0))]
self._last.set_payload(payload)
self._input.pop_eof_matcher()
self._pop_message()
# Set the multipart up for newline cleansing, which will
# happen if we're in a nested multipart.
self._last = self._cur
else:
# I think we must be in the preamble
assert capturing_preamble
preamble.append(line)
# We've seen either the EOF or the end boundary. If we're still
# capturing the preamble, we never saw the start boundary. Note
# that as a defect and store the captured text as the payload.
# Everything from here to the EOF is epilogue.
if capturing_preamble:
self._cur.defects.append(errors.StartBoundaryNotFoundDefect())
self._cur.set_payload(EMPTYSTRING.join(preamble))
epilogue = []
for line in self._input:
if line is NeedMoreData:
yield NeedMoreData
continue
self._cur.epilogue = EMPTYSTRING.join(epilogue)
return
# If the end boundary ended in a newline, we'll need to make sure
# the epilogue isn't None
if linesep:
epilogue = ['']
else:
epilogue = []
for line in self._input:
if line is NeedMoreData:
yield NeedMoreData
continue
epilogue.append(line)
# Any CRLF at the front of the epilogue is not technically part of
# the epilogue. Also, watch out for an empty string epilogue,
# which means a single newline.
if epilogue:
firstline = epilogue[0]
bolmo = NLCRE_bol.match(firstline)
if bolmo:
epilogue[0] = firstline[len(bolmo.group(0)):]
self._cur.epilogue = EMPTYSTRING.join(epilogue)
return
# Otherwise, it's some non-multipart type, so the entire rest of the
# file contents becomes the payload.
lines = []
for line in self._input:
if line is NeedMoreData:
yield NeedMoreData
continue
lines.append(line)
self._cur.set_payload(EMPTYSTRING.join(lines))
def _parse_headers(self, lines):
# Passed a list of lines that make up the headers for the current msg
lastheader = ''
lastvalue = []
for lineno, line in enumerate(lines):
# Check for continuation
if line[0] in ' \t':
if not lastheader:
# The first line of the headers was a continuation. This
# is illegal, so let's note the defect, store the illegal
# line, and ignore it for purposes of headers.
defect = errors.FirstHeaderLineIsContinuationDefect(line)
self._cur.defects.append(defect)
continue
lastvalue.append(line)
continue
if lastheader:
# XXX reconsider the joining of folded lines
lhdr = EMPTYSTRING.join(lastvalue)[:-1].rstrip('\r\n')
self._cur[lastheader] = lhdr
lastheader, lastvalue = '', []
# Check for envelope header, i.e. unix-from
if line.startswith('From '):
if lineno == 0:
# Strip off the trailing newline
mo = NLCRE_eol.search(line)
if mo:
line = line[:-len(mo.group(0))]
self._cur.set_unixfrom(line)
continue
elif lineno == len(lines) - 1:
# Something looking like a unix-from at the end - it's
# probably the first line of the body, so push back the
# line and stop.
self._input.unreadline(line)
return
else:
# Weirdly placed unix-from line. Note this as a defect
# and ignore it.
defect = errors.MisplacedEnvelopeHeaderDefect(line)
self._cur.defects.append(defect)
continue
# Split the line on the colon separating field name from value.
i = line.find(':')
if i < 0:
defect = errors.MalformedHeaderDefect(line)
self._cur.defects.append(defect)
continue
lastheader = line[:i]
lastvalue = [line[i+1:].lstrip()]
# Done with all the lines, so handle the last header.
if lastheader:
# XXX reconsider the joining of folded lines
self._cur[lastheader] = EMPTYSTRING.join(lastvalue).rstrip('\r\n')

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# Copyright (C) 2001-2007 Python Software Foundation
# Author: Barry Warsaw
# Contact: email-sig@python.org
"""Classes to generate plain text from a message object tree."""
__all__ = ['Generator', 'DecodedGenerator']
import re
import sys
import time
import random
import warnings
from io import StringIO
from email.header import Header
UNDERSCORE = '_'
NL = '\n'
fcre = re.compile(r'^From ', re.MULTILINE)
class Generator:
"""Generates output from a Message object tree.
This basic generator writes the message to the given file object as plain
text.
"""
#
# Public interface
#
def __init__(self, outfp, mangle_from_=True, maxheaderlen=78):
"""Create the generator for message flattening.
outfp is the output file-like object for writing the message to. It
must have a write() method.
Optional mangle_from_ is a flag that, when True (the default), escapes
From_ lines in the body of the message by putting a `>' in front of
them.
Optional maxheaderlen specifies the longest length for a non-continued
header. When a header line is longer (in characters, with tabs
expanded to 8 spaces) than maxheaderlen, the header will split as
defined in the Header class. Set maxheaderlen to zero to disable
header wrapping. The default is 78, as recommended (but not required)
by RFC 2822.
"""
self._fp = outfp
self._mangle_from_ = mangle_from_
self._maxheaderlen = maxheaderlen
def write(self, s):
# Just delegate to the file object
self._fp.write(s)
def flatten(self, msg, unixfrom=False):
"""Print the message object tree rooted at msg to the output file
specified when the Generator instance was created.
unixfrom is a flag that forces the printing of a Unix From_ delimiter
before the first object in the message tree. If the original message
has no From_ delimiter, a `standard' one is crafted. By default, this
is False to inhibit the printing of any From_ delimiter.
Note that for subobjects, no From_ line is printed.
"""
if unixfrom:
ufrom = msg.get_unixfrom()
if not ufrom:
ufrom = 'From nobody ' + time.ctime(time.time())
print(ufrom, file=self._fp)
self._write(msg)
def clone(self, fp):
"""Clone this generator with the exact same options."""
return self.__class__(fp, self._mangle_from_, self._maxheaderlen)
#
# Protected interface - undocumented ;/
#
def _write(self, msg):
# We can't write the headers yet because of the following scenario:
# say a multipart message includes the boundary string somewhere in
# its body. We'd have to calculate the new boundary /before/ we write
# the headers so that we can write the correct Content-Type:
# parameter.
#
# The way we do this, so as to make the _handle_*() methods simpler,
# is to cache any subpart writes into a StringIO. The we write the
# headers and the StringIO contents. That way, subpart handlers can
# Do The Right Thing, and can still modify the Content-Type: header if
# necessary.
oldfp = self._fp
try:
self._fp = sfp = StringIO()
self._dispatch(msg)
finally:
self._fp = oldfp
# Write the headers. First we see if the message object wants to
# handle that itself. If not, we'll do it generically.
meth = getattr(msg, '_write_headers', None)
if meth is None:
self._write_headers(msg)
else:
meth(self)
self._fp.write(sfp.getvalue())
def _dispatch(self, msg):
# Get the Content-Type: for the message, then try to dispatch to
# self._handle_<maintype>_<subtype>(). If there's no handler for the
# full MIME type, then dispatch to self._handle_<maintype>(). If
# that's missing too, then dispatch to self._writeBody().
main = msg.get_content_maintype()
sub = msg.get_content_subtype()
specific = UNDERSCORE.join((main, sub)).replace('-', '_')
meth = getattr(self, '_handle_' + specific, None)
if meth is None:
generic = main.replace('-', '_')
meth = getattr(self, '_handle_' + generic, None)
if meth is None:
meth = self._writeBody
meth(msg)
#
# Default handlers
#
def _write_headers(self, msg):
for h, v in msg.items():
print('%s:' % h, end=' ', file=self._fp)
if self._maxheaderlen == 0:
# Explicit no-wrapping
print(v, file=self._fp)
elif isinstance(v, Header):
# Header instances know what to do
print(v.encode(), file=self._fp)
else:
# Header's got lots of smarts, so use it.
header = Header(v, maxlinelen=self._maxheaderlen,
header_name=h, continuation_ws='\t')
print(header.encode(), file=self._fp)
# A blank line always separates headers from body
print(file=self._fp)
#
# Handlers for writing types and subtypes
#
def _handle_text(self, msg):
payload = msg.get_payload()
if payload is None:
return
if not isinstance(payload, basestring):
raise TypeError('string payload expected: %s' % type(payload))
if self._mangle_from_:
payload = fcre.sub('>From ', payload)
self._fp.write(payload)
# Default body handler
_writeBody = _handle_text
def _handle_multipart(self, msg):
# The trick here is to write out each part separately, merge them all
# together, and then make sure that the boundary we've chosen isn't
# present in the payload.
msgtexts = []
subparts = msg.get_payload()
if subparts is None:
subparts = []
elif isinstance(subparts, basestring):
# e.g. a non-strict parse of a message with no starting boundary.
self._fp.write(subparts)
return
elif not isinstance(subparts, list):
# Scalar payload
subparts = [subparts]
for part in subparts:
s = StringIO()
g = self.clone(s)
g.flatten(part, unixfrom=False)
msgtexts.append(s.getvalue())
# Now make sure the boundary we've selected doesn't appear in any of
# the message texts.
alltext = NL.join(msgtexts)
# BAW: What about boundaries that are wrapped in double-quotes?
boundary = msg.get_boundary(failobj=_make_boundary(alltext))
# If we had to calculate a new boundary because the body text
# contained that string, set the new boundary. We don't do it
# unconditionally because, while set_boundary() preserves order, it
# doesn't preserve newlines/continuations in headers. This is no big
# deal in practice, but turns out to be inconvenient for the unittest
# suite.
if msg.get_boundary() != boundary:
msg.set_boundary(boundary)
# If there's a preamble, write it out, with a trailing CRLF
if msg.preamble is not None:
print(msg.preamble, file=self._fp)
# dash-boundary transport-padding CRLF
print('--' + boundary, file=self._fp)
# body-part
if msgtexts:
self._fp.write(msgtexts.pop(0))
# *encapsulation
# --> delimiter transport-padding
# --> CRLF body-part
for body_part in msgtexts:
# delimiter transport-padding CRLF
print('\n--' + boundary, file=self._fp)
# body-part
self._fp.write(body_part)
# close-delimiter transport-padding
self._fp.write('\n--' + boundary + '--')
if msg.epilogue is not None:
print(file=self._fp)
self._fp.write(msg.epilogue)
def _handle_message_delivery_status(self, msg):
# We can't just write the headers directly to self's file object
# because this will leave an extra newline between the last header
# block and the boundary. Sigh.
blocks = []
for part in msg.get_payload():
s = StringIO()
g = self.clone(s)
g.flatten(part, unixfrom=False)
text = s.getvalue()
lines = text.split('\n')
# Strip off the unnecessary trailing empty line
if lines and lines[-1] == '':
blocks.append(NL.join(lines[:-1]))
else:
blocks.append(text)
# Now join all the blocks with an empty line. This has the lovely
# effect of separating each block with an empty line, but not adding
# an extra one after the last one.
self._fp.write(NL.join(blocks))
def _handle_message(self, msg):
s = StringIO()
g = self.clone(s)
# The payload of a message/rfc822 part should be a multipart sequence
# of length 1. The zeroth element of the list should be the Message
# object for the subpart. Extract that object, stringify it, and
# write it out.
g.flatten(msg.get_payload(0), unixfrom=False)
self._fp.write(s.getvalue())
_FMT = '[Non-text (%(type)s) part of message omitted, filename %(filename)s]'
class DecodedGenerator(Generator):
"""Generator a text representation of a message.
Like the Generator base class, except that non-text parts are substituted
with a format string representing the part.
"""
def __init__(self, outfp, mangle_from_=True, maxheaderlen=78, fmt=None):
"""Like Generator.__init__() except that an additional optional
argument is allowed.
Walks through all subparts of a message. If the subpart is of main
type `text', then it prints the decoded payload of the subpart.
Otherwise, fmt is a format string that is used instead of the message
payload. fmt is expanded with the following keywords (in
%(keyword)s format):
type : Full MIME type of the non-text part
maintype : Main MIME type of the non-text part
subtype : Sub-MIME type of the non-text part
filename : Filename of the non-text part
description: Description associated with the non-text part
encoding : Content transfer encoding of the non-text part
The default value for fmt is None, meaning
[Non-text (%(type)s) part of message omitted, filename %(filename)s]
"""
Generator.__init__(self, outfp, mangle_from_, maxheaderlen)
if fmt is None:
self._fmt = _FMT
else:
self._fmt = fmt
def _dispatch(self, msg):
for part in msg.walk():
maintype = part.get_content_maintype()
if maintype == 'text':
print(part.get_payload(decode=True), file=self)
elif maintype == 'multipart':
# Just skip this
pass
else:
print(self._fmt % {
'type' : part.get_content_type(),
'maintype' : part.get_content_maintype(),
'subtype' : part.get_content_subtype(),
'filename' : part.get_filename('[no filename]'),
'description': part.get('Content-Description',
'[no description]'),
'encoding' : part.get('Content-Transfer-Encoding',
'[no encoding]'),
}, file=self)
# Helper
_width = len(repr(sys.maxint-1))
_fmt = '%%0%dd' % _width
def _make_boundary(text=None):
# Craft a random boundary. If text is given, ensure that the chosen
# boundary doesn't appear in the text.
token = random.randrange(sys.maxint)
boundary = ('=' * 15) + (_fmt % token) + '=='
if text is None:
return boundary
b = boundary
counter = 0
while True:
cre = re.compile('^--' + re.escape(b) + '(--)?$', re.MULTILINE)
if not cre.search(text):
break
b = boundary + '.' + str(counter)
counter += 1
return b

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# Copyright (C) 2002-2007 Python Software Foundation
# Author: Ben Gertzfield, Barry Warsaw
# Contact: email-sig@python.org
"""Header encoding and decoding functionality."""
__all__ = [
'Header',
'decode_header',
'make_header',
]
import re
import binascii
import email.quoprimime
import email.base64mime
from email.errors import HeaderParseError
from email.charset import Charset
NL = '\n'
SPACE = ' '
BSPACE = b' '
SPACE8 = ' ' * 8
EMPTYSTRING = ''
MAXLINELEN = 76
USASCII = Charset('us-ascii')
UTF8 = Charset('utf-8')
# Match encoded-word strings in the form =?charset?q?Hello_World?=
ecre = re.compile(r'''
=\? # literal =?
(?P<charset>[^?]*?) # non-greedy up to the next ? is the charset
\? # literal ?
(?P<encoding>[qb]) # either a "q" or a "b", case insensitive
\? # literal ?
(?P<encoded>.*?) # non-greedy up to the next ?= is the encoded string
\?= # literal ?=
(?=[ \t]|$) # whitespace or the end of the string
''', re.VERBOSE | re.IGNORECASE | re.MULTILINE)
# Field name regexp, including trailing colon, but not separating whitespace,
# according to RFC 2822. Character range is from tilde to exclamation mark.
# For use with .match()
fcre = re.compile(r'[\041-\176]+:$')
# Helpers
_max_append = email.quoprimime._max_append
def decode_header(header):
"""Decode a message header value without converting charset.
Returns a list of (string, charset) pairs containing each of the decoded
parts of the header. Charset is None for non-encoded parts of the header,
otherwise a lower-case string containing the name of the character set
specified in the encoded string.
An email.Errors.HeaderParseError may be raised when certain decoding error
occurs (e.g. a base64 decoding exception).
"""
# If no encoding, just return the header with no charset.
if not ecre.search(header):
return [(header, None)]
# First step is to parse all the encoded parts into triplets of the form
# (encoded_string, encoding, charset). For unencoded strings, the last
# two parts will be None.
words = []
for line in header.splitlines():
parts = ecre.split(line)
while parts:
unencoded = parts.pop(0).strip()
if unencoded:
words.append((unencoded, None, None))
if parts:
charset = parts.pop(0).lower()
encoding = parts.pop(0).lower()
encoded = parts.pop(0)
words.append((encoded, encoding, charset))
# The next step is to decode each encoded word by applying the reverse
# base64 or quopri transformation. decoded_words is now a list of the
# form (decoded_word, charset).
decoded_words = []
for encoded_string, encoding, charset in words:
if encoding is None:
# This is an unencoded word.
decoded_words.append((encoded_string, charset))
elif encoding == 'q':
word = email.quoprimime.header_decode(encoded_string)
decoded_words.append((word, charset))
elif encoding == 'b':
try:
word = email.base64mime.decode(encoded_string)
except binascii.Error:
raise HeaderParseError('Base64 decoding error')
else:
decoded_words.append((word, charset))
else:
raise AssertionError('Unexpected encoding: ' + encoding)
# Now convert all words to bytes and collapse consecutive runs of
# similarly encoded words.
collapsed = []
last_word = last_charset = None
for word, charset in decoded_words:
if isinstance(word, str):
word = bytes(ord(c) for c in word)
if last_word is None:
last_word = word
last_charset = charset
elif charset != last_charset:
collapsed.append((last_word, last_charset))
last_word = word
last_charset = charset
elif last_charset is None:
last_word += BSPACE + word
else:
last_word += word
collapsed.append((last_word, last_charset))
return collapsed
def make_header(decoded_seq, maxlinelen=None, header_name=None,
continuation_ws=' '):
"""Create a Header from a sequence of pairs as returned by decode_header()
decode_header() takes a header value string and returns a sequence of
pairs of the format (decoded_string, charset) where charset is the string
name of the character set.
This function takes one of those sequence of pairs and returns a Header
instance. Optional maxlinelen, header_name, and continuation_ws are as in
the Header constructor.
"""
h = Header(maxlinelen=maxlinelen, header_name=header_name,
continuation_ws=continuation_ws)
for s, charset in decoded_seq:
# None means us-ascii but we can simply pass it on to h.append()
if charset is not None and not isinstance(charset, Charset):
charset = Charset(charset)
h.append(s, charset)
return h
class Header:
def __init__(self, s=None, charset=None,
maxlinelen=None, header_name=None,
continuation_ws=' ', errors='strict'):
"""Create a MIME-compliant header that can contain many character sets.
Optional s is the initial header value. If None, the initial header
value is not set. You can later append to the header with .append()
method calls. s may be a byte string or a Unicode string, but see the
.append() documentation for semantics.
Optional charset serves two purposes: it has the same meaning as the
charset argument to the .append() method. It also sets the default
character set for all subsequent .append() calls that omit the charset
argument. If charset is not provided in the constructor, the us-ascii
charset is used both as s's initial charset and as the default for
subsequent .append() calls.
The maximum line length can be specified explicit via maxlinelen. For
splitting the first line to a shorter value (to account for the field
header which isn't included in s, e.g. `Subject') pass in the name of
the field in header_name. The default maxlinelen is 76.
continuation_ws must be RFC 2822 compliant folding whitespace (usually
either a space or a hard tab) which will be prepended to continuation
lines.
errors is passed through to the .append() call.
"""
if charset is None:
charset = USASCII
elif not isinstance(charset, Charset):
charset = Charset(charset)
self._charset = charset
self._continuation_ws = continuation_ws
self._chunks = []
if s is not None:
self.append(s, charset, errors)
if maxlinelen is None:
maxlinelen = MAXLINELEN
self._maxlinelen = maxlinelen
if header_name is None:
self._headerlen = 0
else:
# Take the separating colon and space into account.
self._headerlen = len(header_name) + 2
def __str__(self):
"""Return the string value of the header."""
uchunks = []
lastcs = None
for s, charset in self._chunks:
# We must preserve spaces between encoded and non-encoded word
# boundaries, which means for us we need to add a space when we go
# from a charset to None/us-ascii, or from None/us-ascii to a
# charset. Only do this for the second and subsequent chunks.
nextcs = charset
if uchunks:
if lastcs not in (None, 'us-ascii'):
if nextcs in (None, 'us-ascii'):
uchunks.append(SPACE)
nextcs = None
elif nextcs not in (None, 'us-ascii'):
uchunks.append(SPACE)
lastcs = nextcs
uchunks.append(s)
return EMPTYSTRING.join(uchunks)
# Rich comparison operators for equality only. BAW: does it make sense to
# have or explicitly disable <, <=, >, >= operators?
def __eq__(self, other):
# other may be a Header or a string. Both are fine so coerce
# ourselves to a string, swap the args and do another comparison.
return other == self.encode()
def __ne__(self, other):
return not self == other
def append(self, s, charset=None, errors='strict'):
"""Append a string to the MIME header.
Optional charset, if given, should be a Charset instance or the name
of a character set (which will be converted to a Charset instance). A
value of None (the default) means that the charset given in the
constructor is used.
s may be a byte string or a Unicode string. If it is a byte string
(i.e. isinstance(s, str) is true), then charset is the encoding of
that byte string, and a UnicodeError will be raised if the string
cannot be decoded with that charset. If s is a Unicode string, then
charset is a hint specifying the character set of the characters in
the string. In this case, when producing an RFC 2822 compliant header
using RFC 2047 rules, the Unicode string will be encoded using the
following charsets in order: us-ascii, the charset hint, utf-8. The
first character set not to provoke a UnicodeError is used.
Optional `errors' is passed as the third argument to any unicode() or
ustr.encode() call.
"""
if charset is None:
charset = self._charset
elif not isinstance(charset, Charset):
charset = Charset(charset)
if isinstance(s, str):
# Convert the string from the input character set to the output
# character set and store the resulting bytes and the charset for
# composition later.
input_charset = charset.input_codec or 'us-ascii'
input_bytes = s.encode(input_charset, errors)
else:
# We already have the bytes we will store internally.
input_bytes = s
# Ensure that the bytes we're storing can be decoded to the output
# character set, otherwise an early error is thrown.
output_charset = charset.output_codec or 'us-ascii'
output_string = input_bytes.decode(output_charset, errors)
self._chunks.append((output_string, charset))
def encode(self, splitchars=';, \t'):
"""Encode a message header into an RFC-compliant format.
There are many issues involved in converting a given string for use in
an email header. Only certain character sets are readable in most
email clients, and as header strings can only contain a subset of
7-bit ASCII, care must be taken to properly convert and encode (with
Base64 or quoted-printable) header strings. In addition, there is a
75-character length limit on any given encoded header field, so
line-wrapping must be performed, even with double-byte character sets.
This method will do its best to convert the string to the correct
character set used in email, and encode and line wrap it safely with
the appropriate scheme for that character set.
If the given charset is not known or an error occurs during
conversion, this function will return the header untouched.
Optional splitchars is a string containing characters to split long
ASCII lines on, in rough support of RFC 2822's `highest level
syntactic breaks'. This doesn't affect RFC 2047 encoded lines.
"""
self._normalize()
formatter = _ValueFormatter(self._headerlen, self._maxlinelen,
self._continuation_ws, splitchars)
for string, charset in self._chunks:
lines = string.splitlines()
for line in lines:
formatter.feed(line, charset)
if len(lines) > 1:
formatter.newline()
return str(formatter)
def _normalize(self):
# Normalize the chunks so that all runs of identical charsets get
# collapsed into a single unicode string. You need a space between
# encoded words, or between encoded and unencoded words.
chunks = []
last_charset = None
last_chunk = []
for string, charset in self._chunks:
if charset == last_charset:
last_chunk.append(string)
else:
if last_charset is not None:
chunks.append((SPACE.join(last_chunk), last_charset))
if last_charset != USASCII or charset != USASCII:
chunks.append((' ', USASCII))
last_chunk = [string]
last_charset = charset
if last_chunk:
chunks.append((SPACE.join(last_chunk), last_charset))
self._chunks = chunks
class _ValueFormatter:
def __init__(self, headerlen, maxlen, continuation_ws, splitchars):
self._maxlen = maxlen
self._continuation_ws = continuation_ws
self._continuation_ws_len = len(continuation_ws.replace('\t', SPACE8))
self._splitchars = splitchars
self._lines = []
self._current_line = _Accumulator(headerlen)
def __str__(self):
self.newline()
return NL.join(self._lines)
def newline(self):
if len(self._current_line) > 0:
self._lines.append(str(self._current_line))
self._current_line.reset()
def feed(self, string, charset):
# If the string itself fits on the current line in its encoded format,
# then add it now and be done with it.
encoded_string = charset.header_encode(string)
if len(encoded_string) + len(self._current_line) <= self._maxlen:
self._current_line.push(encoded_string)
return
# Attempt to split the line at the highest-level syntactic break
# possible. Note that we don't have a lot of smarts about field
# syntax; we just try to break on semi-colons, then commas, then
# whitespace. Eventually, we'll allow this to be pluggable.
for ch in self._splitchars:
if ch in string:
break
else:
# We can't split the string to fit on the current line, so just
# put it on a line by itself.
self._lines.append(str(self._current_line))
self._current_line.reset(self._continuation_ws)
self._current_line.push(encoded_string)
return
self._spliterate(string, ch, charset)
def _spliterate(self, string, ch, charset):
holding = _Accumulator(transformfunc=charset.header_encode)
# Split the line on the split character, preserving it. If the split
# character is whitespace RFC 2822 $2.2.3 requires us to fold on the
# whitespace, so that the line leads with the original whitespace we
# split on. However, if a higher syntactic break is used instead
# (e.g. comma or semicolon), the folding should happen after the split
# character. But then in that case, we need to add our own
# continuation whitespace -- although won't that break unfolding?
for part, splitpart, nextpart in _spliterator(ch, string):
if not splitpart:
# No splitpart means this is the last chunk. Put this part
# either on the current line or the next line depending on
# whether it fits.
holding.push(part)
if len(holding) + len(self._current_line) <= self._maxlen:
# It fits, but we're done.
self._current_line.push(str(holding))
else:
# It doesn't fit, but we're done. Before pushing a new
# line, watch out for the current line containing only
# whitespace.
holding.pop()
if len(self._current_line) == 0 and (
len(holding) == 0 or str(holding).isspace()):
# Don't start a new line.
holding.push(part)
part = None
self._current_line.push(str(holding))
self._lines.append(str(self._current_line))
if part is None:
self._current_line.reset()
else:
holding.reset(part)
self._current_line.reset(str(holding))
return
elif not nextpart:
# There must be some trailing split characters because we
# found a split character but no next part. In this case we
# must treat the thing to fit as the part + splitpart because
# if splitpart is whitespace it's not allowed to be the only
# thing on the line, and if it's not whitespace we must split
# after the syntactic break. In either case, we're done.
holding_prelen = len(holding)
holding.push(part + splitpart)
if len(holding) + len(self._current_line) <= self._maxlen:
self._current_line.push(str(holding))
elif holding_prelen == 0:
# This is the only chunk left so it has to go on the
# current line.
self._current_line.push(str(holding))
else:
save_part = holding.pop()
self._current_line.push(str(holding))
self._lines.append(str(self._current_line))
holding.reset(save_part)
self._current_line.reset(str(holding))
return
elif not part:
# We're leading with a split character. See if the splitpart
# and nextpart fits on the current line.
holding.push(splitpart + nextpart)
holding_len = len(holding)
# We know we're not leaving the nextpart on the stack.
holding.pop()
if holding_len + len(self._current_line) <= self._maxlen:
holding.push(splitpart)
else:
# It doesn't fit. Since there's no current part really
# the best we can do is start a new line and push the
# split part onto it.
self._current_line.push(str(holding))
holding.reset()
if len(self._current_line) > 0 and self._lines:
self._lines.append(str(self._current_line))
self._current_line.reset()
holding.push(splitpart)
else:
# All three parts are present. First let's see if all three
# parts will fit on the current line. If so, we don't need to
# split it.
holding.push(part + splitpart + nextpart)
holding_len = len(holding)
# Pop the part because we'll push nextpart on the next
# iteration through the loop.
holding.pop()
if holding_len + len(self._current_line) <= self._maxlen:
holding.push(part + splitpart)
else:
# The entire thing doesn't fit. See if we need to split
# before or after the split characters.
if splitpart.isspace():
# Split before whitespace. Remember that the
# whitespace becomes the continuation whitespace of
# the next line so it goes to current_line not holding.
holding.push(part)
self._current_line.push(str(holding))
holding.reset()
self._lines.append(str(self._current_line))
self._current_line.reset(splitpart)
else:
# Split after non-whitespace. The continuation
# whitespace comes from the instance variable.
holding.push(part + splitpart)
self._current_line.push(str(holding))
holding.reset()
self._lines.append(str(self._current_line))
if nextpart[0].isspace():
self._current_line.reset()
else:
self._current_line.reset(self._continuation_ws)
# Get the last of the holding part
self._current_line.push(str(holding))
def _spliterator(character, string):
parts = list(reversed(re.split('(%s)' % character, string)))
while parts:
part = parts.pop()
splitparts = (parts.pop() if parts else None)
nextpart = (parts.pop() if parts else None)
yield (part, splitparts, nextpart)
if nextpart is not None:
parts.append(nextpart)
class _Accumulator:
def __init__(self, initial_size=0, transformfunc=None):
self._initial_size = initial_size
if transformfunc is None:
self._transformfunc = lambda string: string
else:
self._transformfunc = transformfunc
self._current = []
def push(self, string):
self._current.append(string)
def pop(self):
return self._current.pop()
def __len__(self):
return len(str(self)) + self._initial_size
def __str__(self):
return self._transformfunc(EMPTYSTRING.join(self._current))
def reset(self, string=None):
self._current = []
self._current_len = 0
self._initial_size = 0
if string is not None:
self.push(string)

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# Copyright (C) 2001-2006 Python Software Foundation
# Author: Barry Warsaw
# Contact: email-sig@python.org
"""Various types of useful iterators and generators."""
__all__ = [
'body_line_iterator',
'typed_subpart_iterator',
'walk',
# Do not include _structure() since it's part of the debugging API.
]
import sys
from io import StringIO
# This function will become a method of the Message class
def walk(self):
"""Walk over the message tree, yielding each subpart.
The walk is performed in depth-first order. This method is a
generator.
"""
yield self
if self.is_multipart():
for subpart in self.get_payload():
for subsubpart in subpart.walk():
yield subsubpart
# These two functions are imported into the Iterators.py interface module.
def body_line_iterator(msg, decode=False):
"""Iterate over the parts, returning string payloads line-by-line.
Optional decode (default False) is passed through to .get_payload().
"""
for subpart in msg.walk():
payload = subpart.get_payload(decode=decode)
if isinstance(payload, basestring):
for line in StringIO(payload):
yield line
def typed_subpart_iterator(msg, maintype='text', subtype=None):
"""Iterate over the subparts with a given MIME type.
Use `maintype' as the main MIME type to match against; this defaults to
"text". Optional `subtype' is the MIME subtype to match against; if
omitted, only the main type is matched.
"""
for subpart in msg.walk():
if subpart.get_content_maintype() == maintype:
if subtype is None or subpart.get_content_subtype() == subtype:
yield subpart
def _structure(msg, fp=None, level=0, include_default=False):
"""A handy debugging aid"""
if fp is None:
fp = sys.stdout
tab = ' ' * (level * 4)
print(tab + msg.get_content_type(), end='', file=fp)
if include_default:
print(' [%s]' % msg.get_default_type(), file=fp)
else:
print(file=fp)
if msg.is_multipart():
for subpart in msg.get_payload():
_structure(subpart, fp, level+1, include_default)

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# Copyright (C) 2001-2007 Python Software Foundation
# Author: Barry Warsaw
# Contact: email-sig@python.org
"""Basic message object for the email package object model."""
__all__ = ['Message']
import re
import uu
import binascii
import warnings
from io import BytesIO, StringIO
# Intrapackage imports
import email.charset
from email import utils
from email import errors
SEMISPACE = '; '
# Regular expression used to split header parameters. BAW: this may be too
# simple. It isn't strictly RFC 2045 (section 5.1) compliant, but it catches
# most headers found in the wild. We may eventually need a full fledged
# parser eventually.
paramre = re.compile(r'\s*;\s*')
# Regular expression that matches `special' characters in parameters, the
# existance of which force quoting of the parameter value.
tspecials = re.compile(r'[ \(\)<>@,;:\\"/\[\]\?=]')
# Helper functions
def _formatparam(param, value=None, quote=True):
"""Convenience function to format and return a key=value pair.
This will quote the value if needed or if quote is true.
"""
if value is not None and len(value) > 0:
# A tuple is used for RFC 2231 encoded parameter values where items
# are (charset, language, value). charset is a string, not a Charset
# instance.
if isinstance(value, tuple):
# Encode as per RFC 2231
param += '*'
value = utils.encode_rfc2231(value[2], value[0], value[1])
# BAW: Please check this. I think that if quote is set it should
# force quoting even if not necessary.
if quote or tspecials.search(value):
return '%s="%s"' % (param, utils.quote(value))
else:
return '%s=%s' % (param, value)
else:
return param
def _parseparam(s):
plist = []
while s[:1] == ';':
s = s[1:]
end = s.find(';')
while end > 0 and s.count('"', 0, end) % 2:
end = s.find(';', end + 1)
if end < 0:
end = len(s)
f = s[:end]
if '=' in f:
i = f.index('=')
f = f[:i].strip().lower() + '=' + f[i+1:].strip()
plist.append(f.strip())
s = s[end:]
return plist
def _unquotevalue(value):
# This is different than utils.collapse_rfc2231_value() because it doesn't
# try to convert the value to a unicode. Message.get_param() and
# Message.get_params() are both currently defined to return the tuple in
# the face of RFC 2231 parameters.
if isinstance(value, tuple):
return value[0], value[1], utils.unquote(value[2])
else:
return utils.unquote(value)
class Message:
"""Basic message object.
A message object is defined as something that has a bunch of RFC 2822
headers and a payload. It may optionally have an envelope header
(a.k.a. Unix-From or From_ header). If the message is a container (i.e. a
multipart or a message/rfc822), then the payload is a list of Message
objects, otherwise it is a string.
Message objects implement part of the `mapping' interface, which assumes
there is exactly one occurrance of the header per message. Some headers
do in fact appear multiple times (e.g. Received) and for those headers,
you must use the explicit API to set or get all the headers. Not all of
the mapping methods are implemented.
"""
def __init__(self):
self._headers = []
self._unixfrom = None
self._payload = None
self._charset = None
# Defaults for multipart messages
self.preamble = self.epilogue = None
self.defects = []
# Default content type
self._default_type = 'text/plain'
def __str__(self):
"""Return the entire formatted message as a string.
This includes the headers, body, and envelope header.
"""
return self.as_string()
def as_string(self, unixfrom=False, maxheaderlen=0):
"""Return the entire formatted message as a string.
Optional `unixfrom' when True, means include the Unix From_ envelope
header.
This is a convenience method and may not generate the message exactly
as you intend because by default it mangles lines that begin with
"From ". For more flexibility, use the flatten() method of a
Generator instance.
"""
from email.generator import Generator
fp = StringIO()
g = Generator(fp, mangle_from_=False, maxheaderlen=maxheaderlen)
g.flatten(self, unixfrom=unixfrom)
return fp.getvalue()
def is_multipart(self):
"""Return True if the message consists of multiple parts."""
return isinstance(self._payload, list)
#
# Unix From_ line
#
def set_unixfrom(self, unixfrom):
self._unixfrom = unixfrom
def get_unixfrom(self):
return self._unixfrom
#
# Payload manipulation.
#
def attach(self, payload):
"""Add the given payload to the current payload.
The current payload will always be a list of objects after this method
is called. If you want to set the payload to a scalar object, use
set_payload() instead.
"""
if self._payload is None:
self._payload = [payload]
else:
self._payload.append(payload)
def get_payload(self, i=None, decode=False):
"""Return a reference to the payload.
The payload will either be a list object or a string. If you mutate
the list object, you modify the message's payload in place. Optional
i returns that index into the payload.
Optional decode is a flag indicating whether the payload should be
decoded or not, according to the Content-Transfer-Encoding header
(default is False).
When True and the message is not a multipart, the payload will be
decoded if this header's value is `quoted-printable' or `base64'. If
some other encoding is used, or the header is missing, or if the
payload has bogus data (i.e. bogus base64 or uuencoded data), the
payload is returned as-is.
If the message is a multipart and the decode flag is True, then None
is returned.
"""
if i is None:
payload = self._payload
elif not isinstance(self._payload, list):
raise TypeError('Expected list, got %s' % type(self._payload))
else:
payload = self._payload[i]
if not decode:
return payload
# Decoded payloads always return bytes. XXX split this part out into
# a new method called .get_decoded_payload().
if self.is_multipart():
return None
cte = self.get('content-transfer-encoding', '').lower()
if cte == 'quoted-printable':
return utils._qdecode(payload)
elif cte == 'base64':
try:
return utils._bdecode(payload)
except binascii.Error:
# Incorrect padding
pass
elif cte in ('x-uuencode', 'uuencode', 'uue', 'x-uue'):
in_file = BytesIO(bytes(payload + '\n'))
out_file = BytesIO()
try:
uu.decode(in_file, out_file, quiet=True)
return out_file.getvalue()
except uu.Error:
# Some decoding problem
pass
# Is there a better way to do this? We can't use the bytes
# constructor.
return bytes(ord(c) for c in payload)
def set_payload(self, payload, charset=None):
"""Set the payload to the given value.
Optional charset sets the message's default character set. See
set_charset() for details.
"""
self._payload = payload
if charset is not None:
self.set_charset(charset)
def set_charset(self, charset):
"""Set the charset of the payload to a given character set.
charset can be a Charset instance, a string naming a character set, or
None. If it is a string it will be converted to a Charset instance.
If charset is None, the charset parameter will be removed from the
Content-Type field. Anything else will generate a TypeError.
The message will be assumed to be of type text/* encoded with
charset.input_charset. It will be converted to charset.output_charset
and encoded properly, if needed, when generating the plain text
representation of the message. MIME headers (MIME-Version,
Content-Type, Content-Transfer-Encoding) will be added as needed.
"""
if charset is None:
self.del_param('charset')
self._charset = None
return
if isinstance(charset, basestring):
charset = email.charset.Charset(charset)
if not isinstance(charset, email.charset.Charset):
raise TypeError(charset)
# BAW: should we accept strings that can serve as arguments to the
# Charset constructor?
self._charset = charset
if 'MIME-Version' not in self:
self.add_header('MIME-Version', '1.0')
if 'Content-Type' not in self:
self.add_header('Content-Type', 'text/plain',
charset=charset.get_output_charset())
else:
self.set_param('charset', charset.get_output_charset())
if str(charset) != charset.get_output_charset():
self._payload = charset.body_encode(self._payload)
if 'Content-Transfer-Encoding' not in self:
cte = charset.get_body_encoding()
try:
cte(self)
except TypeError:
self._payload = charset.body_encode(self._payload)
self.add_header('Content-Transfer-Encoding', cte)
def get_charset(self):
"""Return the Charset instance associated with the message's payload.
"""
return self._charset
#
# MAPPING INTERFACE (partial)
#
def __len__(self):
"""Return the total number of headers, including duplicates."""
return len(self._headers)
def __getitem__(self, name):
"""Get a header value.
Return None if the header is missing instead of raising an exception.
Note that if the header appeared multiple times, exactly which
occurrance gets returned is undefined. Use get_all() to get all
the values matching a header field name.
"""
return self.get(name)
def __setitem__(self, name, val):
"""Set the value of a header.
Note: this does not overwrite an existing header with the same field
name. Use __delitem__() first to delete any existing headers.
"""
self._headers.append((name, val))
def __delitem__(self, name):
"""Delete all occurrences of a header, if present.
Does not raise an exception if the header is missing.
"""
name = name.lower()
newheaders = []
for k, v in self._headers:
if k.lower() != name:
newheaders.append((k, v))
self._headers = newheaders
def __contains__(self, name):
return name.lower() in [k.lower() for k, v in self._headers]
def __iter__(self):
for field, value in self._headers:
yield field
def __len__(self):
return len(self._headers)
def keys(self):
"""Return a list of all the message's header field names.
These will be sorted in the order they appeared in the original
message, or were added to the message, and may contain duplicates.
Any fields deleted and re-inserted are always appended to the header
list.
"""
return [k for k, v in self._headers]
def values(self):
"""Return a list of all the message's header values.
These will be sorted in the order they appeared in the original
message, or were added to the message, and may contain duplicates.
Any fields deleted and re-inserted are always appended to the header
list.
"""
return [v for k, v in self._headers]
def items(self):
"""Get all the message's header fields and values.
These will be sorted in the order they appeared in the original
message, or were added to the message, and may contain duplicates.
Any fields deleted and re-inserted are always appended to the header
list.
"""
return self._headers[:]
def get(self, name, failobj=None):
"""Get a header value.
Like __getitem__() but return failobj instead of None when the field
is missing.
"""
name = name.lower()
for k, v in self._headers:
if k.lower() == name:
return v
return failobj
#
# Additional useful stuff
#
def get_all(self, name, failobj=None):
"""Return a list of all the values for the named field.
These will be sorted in the order they appeared in the original
message, and may contain duplicates. Any fields deleted and
re-inserted are always appended to the header list.
If no such fields exist, failobj is returned (defaults to None).
"""
values = []
name = name.lower()
for k, v in self._headers:
if k.lower() == name:
values.append(v)
if not values:
return failobj
return values
def add_header(self, _name, _value, **_params):
"""Extended header setting.
name is the header field to add. keyword arguments can be used to set
additional parameters for the header field, with underscores converted
to dashes. Normally the parameter will be added as key="value" unless
value is None, in which case only the key will be added.
Example:
msg.add_header('content-disposition', 'attachment', filename='bud.gif')
"""
parts = []
for k, v in _params.items():
if v is None:
parts.append(k.replace('_', '-'))
else:
parts.append(_formatparam(k.replace('_', '-'), v))
if _value is not None:
parts.insert(0, _value)
self._headers.append((_name, SEMISPACE.join(parts)))
def replace_header(self, _name, _value):
"""Replace a header.
Replace the first matching header found in the message, retaining
header order and case. If no matching header was found, a KeyError is
raised.
"""
_name = _name.lower()
for i, (k, v) in zip(range(len(self._headers)), self._headers):
if k.lower() == _name:
self._headers[i] = (k, _value)
break
else:
raise KeyError(_name)
#
# Use these three methods instead of the three above.
#
def get_content_type(self):
"""Return the message's content type.
The returned string is coerced to lower case of the form
`maintype/subtype'. If there was no Content-Type header in the
message, the default type as given by get_default_type() will be
returned. Since according to RFC 2045, messages always have a default
type this will always return a value.
RFC 2045 defines a message's default type to be text/plain unless it
appears inside a multipart/digest container, in which case it would be
message/rfc822.
"""
missing = object()
value = self.get('content-type', missing)
if value is missing:
# This should have no parameters
return self.get_default_type()
ctype = paramre.split(value)[0].lower().strip()
# RFC 2045, section 5.2 says if its invalid, use text/plain
if ctype.count('/') != 1:
return 'text/plain'
return ctype
def get_content_maintype(self):
"""Return the message's main content type.
This is the `maintype' part of the string returned by
get_content_type().
"""
ctype = self.get_content_type()
return ctype.split('/')[0]
def get_content_subtype(self):
"""Returns the message's sub-content type.
This is the `subtype' part of the string returned by
get_content_type().
"""
ctype = self.get_content_type()
return ctype.split('/')[1]
def get_default_type(self):
"""Return the `default' content type.
Most messages have a default content type of text/plain, except for
messages that are subparts of multipart/digest containers. Such
subparts have a default content type of message/rfc822.
"""
return self._default_type
def set_default_type(self, ctype):
"""Set the `default' content type.
ctype should be either "text/plain" or "message/rfc822", although this
is not enforced. The default content type is not stored in the
Content-Type header.
"""
self._default_type = ctype
def _get_params_preserve(self, failobj, header):
# Like get_params() but preserves the quoting of values. BAW:
# should this be part of the public interface?
missing = object()
value = self.get(header, missing)
if value is missing:
return failobj
params = []
for p in _parseparam(';' + value):
try:
name, val = p.split('=', 1)
name = name.strip()
val = val.strip()
except ValueError:
# Must have been a bare attribute
name = p.strip()
val = ''
params.append((name, val))
params = utils.decode_params(params)
return params
def get_params(self, failobj=None, header='content-type', unquote=True):
"""Return the message's Content-Type parameters, as a list.
The elements of the returned list are 2-tuples of key/value pairs, as
split on the `=' sign. The left hand side of the `=' is the key,
while the right hand side is the value. If there is no `=' sign in
the parameter the value is the empty string. The value is as
described in the get_param() method.
Optional failobj is the object to return if there is no Content-Type
header. Optional header is the header to search instead of
Content-Type. If unquote is True, the value is unquoted.
"""
missing = object()
params = self._get_params_preserve(missing, header)
if params is missing:
return failobj
if unquote:
return [(k, _unquotevalue(v)) for k, v in params]
else:
return params
def get_param(self, param, failobj=None, header='content-type',
unquote=True):
"""Return the parameter value if found in the Content-Type header.
Optional failobj is the object to return if there is no Content-Type
header, or the Content-Type header has no such parameter. Optional
header is the header to search instead of Content-Type.
Parameter keys are always compared case insensitively. The return
value can either be a string, or a 3-tuple if the parameter was RFC
2231 encoded. When it's a 3-tuple, the elements of the value are of
the form (CHARSET, LANGUAGE, VALUE). Note that both CHARSET and
LANGUAGE can be None, in which case you should consider VALUE to be
encoded in the us-ascii charset. You can usually ignore LANGUAGE.
Your application should be prepared to deal with 3-tuple return
values, and can convert the parameter to a Unicode string like so:
param = msg.get_param('foo')
if isinstance(param, tuple):
param = unicode(param[2], param[0] or 'us-ascii')
In any case, the parameter value (either the returned string, or the
VALUE item in the 3-tuple) is always unquoted, unless unquote is set
to False.
"""
if header not in self:
return failobj
for k, v in self._get_params_preserve(failobj, header):
if k.lower() == param.lower():
if unquote:
return _unquotevalue(v)
else:
return v
return failobj
def set_param(self, param, value, header='Content-Type', requote=True,
charset=None, language=''):
"""Set a parameter in the Content-Type header.
If the parameter already exists in the header, its value will be
replaced with the new value.
If header is Content-Type and has not yet been defined for this
message, it will be set to "text/plain" and the new parameter and
value will be appended as per RFC 2045.
An alternate header can specified in the header argument, and all
parameters will be quoted as necessary unless requote is False.
If charset is specified, the parameter will be encoded according to RFC
2231. Optional language specifies the RFC 2231 language, defaulting
to the empty string. Both charset and language should be strings.
"""
if not isinstance(value, tuple) and charset:
value = (charset, language, value)
if header not in self and header.lower() == 'content-type':
ctype = 'text/plain'
else:
ctype = self.get(header)
if not self.get_param(param, header=header):
if not ctype:
ctype = _formatparam(param, value, requote)
else:
ctype = SEMISPACE.join(
[ctype, _formatparam(param, value, requote)])
else:
ctype = ''
for old_param, old_value in self.get_params(header=header,
unquote=requote):
append_param = ''
if old_param.lower() == param.lower():
append_param = _formatparam(param, value, requote)
else:
append_param = _formatparam(old_param, old_value, requote)
if not ctype:
ctype = append_param
else:
ctype = SEMISPACE.join([ctype, append_param])
if ctype != self.get(header):
del self[header]
self[header] = ctype
def del_param(self, param, header='content-type', requote=True):
"""Remove the given parameter completely from the Content-Type header.
The header will be re-written in place without the parameter or its
value. All values will be quoted as necessary unless requote is
False. Optional header specifies an alternative to the Content-Type
header.
"""
if header not in self:
return
new_ctype = ''
for p, v in self.get_params(header=header, unquote=requote):
if p.lower() != param.lower():
if not new_ctype:
new_ctype = _formatparam(p, v, requote)
else:
new_ctype = SEMISPACE.join([new_ctype,
_formatparam(p, v, requote)])
if new_ctype != self.get(header):
del self[header]
self[header] = new_ctype
def set_type(self, type, header='Content-Type', requote=True):
"""Set the main type and subtype for the Content-Type header.
type must be a string in the form "maintype/subtype", otherwise a
ValueError is raised.
This method replaces the Content-Type header, keeping all the
parameters in place. If requote is False, this leaves the existing
header's quoting as is. Otherwise, the parameters will be quoted (the
default).
An alternative header can be specified in the header argument. When
the Content-Type header is set, we'll always also add a MIME-Version
header.
"""
# BAW: should we be strict?
if not type.count('/') == 1:
raise ValueError
# Set the Content-Type, you get a MIME-Version
if header.lower() == 'content-type':
del self['mime-version']
self['MIME-Version'] = '1.0'
if header not in self:
self[header] = type
return
params = self.get_params(header=header, unquote=requote)
del self[header]
self[header] = type
# Skip the first param; it's the old type.
for p, v in params[1:]:
self.set_param(p, v, header, requote)
def get_filename(self, failobj=None):
"""Return the filename associated with the payload if present.
The filename is extracted from the Content-Disposition header's
`filename' parameter, and it is unquoted. If that header is missing
the `filename' parameter, this method falls back to looking for the
`name' parameter.
"""
missing = object()
filename = self.get_param('filename', missing, 'content-disposition')
if filename is missing:
filename = self.get_param('name', missing, 'content-disposition')
if filename is missing:
return failobj
return utils.collapse_rfc2231_value(filename).strip()
def get_boundary(self, failobj=None):
"""Return the boundary associated with the payload if present.
The boundary is extracted from the Content-Type header's `boundary'
parameter, and it is unquoted.
"""
missing = object()
boundary = self.get_param('boundary', missing)
if boundary is missing:
return failobj
# RFC 2046 says that boundaries may begin but not end in w/s
return utils.collapse_rfc2231_value(boundary).rstrip()
def set_boundary(self, boundary):
"""Set the boundary parameter in Content-Type to 'boundary'.
This is subtly different than deleting the Content-Type header and
adding a new one with a new boundary parameter via add_header(). The
main difference is that using the set_boundary() method preserves the
order of the Content-Type header in the original message.
HeaderParseError is raised if the message has no Content-Type header.
"""
missing = object()
params = self._get_params_preserve(missing, 'content-type')
if params is missing:
# There was no Content-Type header, and we don't know what type
# to set it to, so raise an exception.
raise errors.HeaderParseError('No Content-Type header found')
newparams = []
foundp = False
for pk, pv in params:
if pk.lower() == 'boundary':
newparams.append(('boundary', '"%s"' % boundary))
foundp = True
else:
newparams.append((pk, pv))
if not foundp:
# The original Content-Type header had no boundary attribute.
# Tack one on the end. BAW: should we raise an exception
# instead???
newparams.append(('boundary', '"%s"' % boundary))
# Replace the existing Content-Type header with the new value
newheaders = []
for h, v in self._headers:
if h.lower() == 'content-type':
parts = []
for k, v in newparams:
if v == '':
parts.append(k)
else:
parts.append('%s=%s' % (k, v))
newheaders.append((h, SEMISPACE.join(parts)))
else:
newheaders.append((h, v))
self._headers = newheaders
def get_content_charset(self, failobj=None):
"""Return the charset parameter of the Content-Type header.
The returned string is always coerced to lower case. If there is no
Content-Type header, or if that header has no charset parameter,
failobj is returned.
"""
missing = object()
charset = self.get_param('charset', missing)
if charset is missing:
return failobj
if isinstance(charset, tuple):
# RFC 2231 encoded, so decode it, and it better end up as ascii.
pcharset = charset[0] or 'us-ascii'
try:
# LookupError will be raised if the charset isn't known to
# Python. UnicodeError will be raised if the encoded text
# contains a character not in the charset.
charset = str(bytes(charset[2]), pcharset)
except (LookupError, UnicodeError):
charset = charset[2]
# charset characters must be in us-ascii range
try:
charset.encode('us-ascii')
except UnicodeError:
return failobj
# RFC 2046, $4.1.2 says charsets are not case sensitive
return charset.lower()
def get_charsets(self, failobj=None):
"""Return a list containing the charset(s) used in this message.
The returned list of items describes the Content-Type headers'
charset parameter for this message and all the subparts in its
payload.
Each item will either be a string (the value of the charset parameter
in the Content-Type header of that part) or the value of the
'failobj' parameter (defaults to None), if the part does not have a
main MIME type of "text", or the charset is not defined.
The list will contain one string for each part of the message, plus
one for the container message (i.e. self), so that a non-multipart
message will still return a list of length 1.
"""
return [part.get_content_charset(failobj) for part in self.walk()]
# I.e. def walk(self): ...
from email.iterators import walk

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# Copyright (C) 2001-2006 Python Software Foundation
# Author: Keith Dart
# Contact: email-sig@python.org
"""Class representing application/* type MIME documents."""
__all__ = ["MIMEApplication"]
from email import encoders
from email.mime.nonmultipart import MIMENonMultipart
class MIMEApplication(MIMENonMultipart):
"""Class for generating application/* MIME documents."""
def __init__(self, _data, _subtype='octet-stream',
_encoder=encoders.encode_base64, **_params):
"""Create an application/* type MIME document.
_data is a string containing the raw applicatoin data.
_subtype is the MIME content type subtype, defaulting to
'octet-stream'.
_encoder is a function which will perform the actual encoding for
transport of the application data, defaulting to base64 encoding.
Any additional keyword arguments are passed to the base class
constructor, which turns them into parameters on the Content-Type
header.
"""
if _subtype is None:
raise TypeError('Invalid application MIME subtype')
MIMENonMultipart.__init__(self, 'application', _subtype, **_params)
self.set_payload(_data)
_encoder(self)

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# Copyright (C) 2001-2007 Python Software Foundation
# Author: Anthony Baxter
# Contact: email-sig@python.org
"""Class representing audio/* type MIME documents."""
__all__ = ['MIMEAudio']
import sndhdr
from io import BytesIO
from email import encoders
from email.mime.nonmultipart import MIMENonMultipart
_sndhdr_MIMEmap = {'au' : 'basic',
'wav' :'x-wav',
'aiff':'x-aiff',
'aifc':'x-aiff',
}
# There are others in sndhdr that don't have MIME types. :(
# Additional ones to be added to sndhdr? midi, mp3, realaudio, wma??
def _whatsnd(data):
"""Try to identify a sound file type.
sndhdr.what() has a pretty cruddy interface, unfortunately. This is why
we re-do it here. It would be easier to reverse engineer the Unix 'file'
command and use the standard 'magic' file, as shipped with a modern Unix.
"""
hdr = data[:512]
fakefile = BytesIO(hdr)
for testfn in sndhdr.tests:
res = testfn(hdr, fakefile)
if res is not None:
return _sndhdr_MIMEmap.get(res[0])
return None
class MIMEAudio(MIMENonMultipart):
"""Class for generating audio/* MIME documents."""
def __init__(self, _audiodata, _subtype=None,
_encoder=encoders.encode_base64, **_params):
"""Create an audio/* type MIME document.
_audiodata is a string containing the raw audio data. If this data
can be decoded by the standard Python `sndhdr' module, then the
subtype will be automatically included in the Content-Type header.
Otherwise, you can specify the specific audio subtype via the
_subtype parameter. If _subtype is not given, and no subtype can be
guessed, a TypeError is raised.
_encoder is a function which will perform the actual encoding for
transport of the image data. It takes one argument, which is this
Image instance. It should use get_payload() and set_payload() to
change the payload to the encoded form. It should also add any
Content-Transfer-Encoding or other headers to the message as
necessary. The default encoding is Base64.
Any additional keyword arguments are passed to the base class
constructor, which turns them into parameters on the Content-Type
header.
"""
if _subtype is None:
_subtype = _whatsnd(_audiodata)
if _subtype is None:
raise TypeError('Could not find audio MIME subtype')
MIMENonMultipart.__init__(self, 'audio', _subtype, **_params)
self.set_payload(_audiodata)
_encoder(self)

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Lib/email/mime/base.py Normal file
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# Copyright (C) 2001-2006 Python Software Foundation
# Author: Barry Warsaw
# Contact: email-sig@python.org
"""Base class for MIME specializations."""
__all__ = ['MIMEBase']
from email import message
class MIMEBase(message.Message):
"""Base class for MIME specializations."""
def __init__(self, _maintype, _subtype, **_params):
"""This constructor adds a Content-Type: and a MIME-Version: header.
The Content-Type: header is taken from the _maintype and _subtype
arguments. Additional parameters for this header are taken from the
keyword arguments.
"""
message.Message.__init__(self)
ctype = '%s/%s' % (_maintype, _subtype)
self.add_header('Content-Type', ctype, **_params)
self['MIME-Version'] = '1.0'

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# Copyright (C) 2001-2006 Python Software Foundation
# Author: Barry Warsaw
# Contact: email-sig@python.org
"""Class representing image/* type MIME documents."""
__all__ = ['MIMEImage']
import imghdr
from email import encoders
from email.mime.nonmultipart import MIMENonMultipart
class MIMEImage(MIMENonMultipart):
"""Class for generating image/* type MIME documents."""
def __init__(self, _imagedata, _subtype=None,
_encoder=encoders.encode_base64, **_params):
"""Create an image/* type MIME document.
_imagedata is a string containing the raw image data. If this data
can be decoded by the standard Python `imghdr' module, then the
subtype will be automatically included in the Content-Type header.
Otherwise, you can specify the specific image subtype via the _subtype
parameter.
_encoder is a function which will perform the actual encoding for
transport of the image data. It takes one argument, which is this
Image instance. It should use get_payload() and set_payload() to
change the payload to the encoded form. It should also add any
Content-Transfer-Encoding or other headers to the message as
necessary. The default encoding is Base64.
Any additional keyword arguments are passed to the base class
constructor, which turns them into parameters on the Content-Type
header.
"""
if _subtype is None:
_subtype = imghdr.what(None, _imagedata)
if _subtype is None:
raise TypeError('Could not guess image MIME subtype')
MIMENonMultipart.__init__(self, 'image', _subtype, **_params)
self.set_payload(_imagedata)
_encoder(self)

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Lib/email/mime/message.py Normal file
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# Copyright (C) 2001-2006 Python Software Foundation
# Author: Barry Warsaw
# Contact: email-sig@python.org
"""Class representing message/* MIME documents."""
__all__ = ['MIMEMessage']
from email import message
from email.mime.nonmultipart import MIMENonMultipart
class MIMEMessage(MIMENonMultipart):
"""Class representing message/* MIME documents."""
def __init__(self, _msg, _subtype='rfc822'):
"""Create a message/* type MIME document.
_msg is a message object and must be an instance of Message, or a
derived class of Message, otherwise a TypeError is raised.
Optional _subtype defines the subtype of the contained message. The
default is "rfc822" (this is defined by the MIME standard, even though
the term "rfc822" is technically outdated by RFC 2822).
"""
MIMENonMultipart.__init__(self, 'message', _subtype)
if not isinstance(_msg, message.Message):
raise TypeError('Argument is not an instance of Message')
# It's convenient to use this base class method. We need to do it
# this way or we'll get an exception
message.Message.attach(self, _msg)
# And be sure our default type is set correctly
self.set_default_type('message/rfc822')

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# Copyright (C) 2002-2006 Python Software Foundation
# Author: Barry Warsaw
# Contact: email-sig@python.org
"""Base class for MIME multipart/* type messages."""
__all__ = ['MIMEMultipart']
from email.mime.base import MIMEBase
class MIMEMultipart(MIMEBase):
"""Base class for MIME multipart/* type messages."""
def __init__(self, _subtype='mixed', boundary=None, _subparts=None,
**_params):
"""Creates a multipart/* type message.
By default, creates a multipart/mixed message, with proper
Content-Type and MIME-Version headers.
_subtype is the subtype of the multipart content type, defaulting to
`mixed'.
boundary is the multipart boundary string. By default it is
calculated as needed.
_subparts is a sequence of initial subparts for the payload. It
must be an iterable object, such as a list. You can always
attach new subparts to the message by using the attach() method.
Additional parameters for the Content-Type header are taken from the
keyword arguments (or passed into the _params argument).
"""
MIMEBase.__init__(self, 'multipart', _subtype, **_params)
if _subparts:
for p in _subparts:
self.attach(p)
if boundary:
self.set_boundary(boundary)

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# Copyright (C) 2002-2006 Python Software Foundation
# Author: Barry Warsaw
# Contact: email-sig@python.org
"""Base class for MIME type messages that are not multipart."""
__all__ = ['MIMENonMultipart']
from email import errors
from email.mime.base import MIMEBase
class MIMENonMultipart(MIMEBase):
"""Base class for MIME multipart/* type messages."""
__pychecker__ = 'unusednames=payload'
def attach(self, payload):
# The public API prohibits attaching multiple subparts to MIMEBase
# derived subtypes since none of them are, by definition, of content
# type multipart/*
raise errors.MultipartConversionError(
'Cannot attach additional subparts to non-multipart/*')
del __pychecker__

30
Lib/email/mime/text.py Normal file
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# Copyright (C) 2001-2006 Python Software Foundation
# Author: Barry Warsaw
# Contact: email-sig@python.org
"""Class representing text/* type MIME documents."""
__all__ = ['MIMEText']
from email.encoders import encode_7or8bit
from email.mime.nonmultipart import MIMENonMultipart
class MIMEText(MIMENonMultipart):
"""Class for generating text/* type MIME documents."""
def __init__(self, _text, _subtype='plain', _charset='us-ascii'):
"""Create a text/* type MIME document.
_text is the string for this message object.
_subtype is the MIME sub content type, defaulting to "plain".
_charset is the character set parameter added to the Content-Type
header. This defaults to "us-ascii". Note that as a side-effect, the
Content-Transfer-Encoding header will also be set.
"""
MIMENonMultipart.__init__(self, 'text', _subtype,
**{'charset': _charset})
self.set_payload(_text, _charset)

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# Copyright (C) 2001-2007 Python Software Foundation
# Author: Barry Warsaw, Thomas Wouters, Anthony Baxter
# Contact: email-sig@python.org
"""A parser of RFC 2822 and MIME email messages."""
__all__ = ['Parser', 'HeaderParser']
import warnings
from io import StringIO
from email.feedparser import FeedParser
from email.message import Message
class Parser:
def __init__(self, *args, **kws):
"""Parser of RFC 2822 and MIME email messages.
Creates an in-memory object tree representing the email message, which
can then be manipulated and turned over to a Generator to return the
textual representation of the message.
The string must be formatted as a block of RFC 2822 headers and header
continuation lines, optionally preceeded by a `Unix-from' header. The
header block is terminated either by the end of the string or by a
blank line.
_class is the class to instantiate for new message objects when they
must be created. This class must have a constructor that can take
zero arguments. Default is Message.Message.
"""
if len(args) >= 1:
if '_class' in kws:
raise TypeError("Multiple values for keyword arg '_class'")
kws['_class'] = args[0]
if len(args) == 2:
if 'strict' in kws:
raise TypeError("Multiple values for keyword arg 'strict'")
kws['strict'] = args[1]
if len(args) > 2:
raise TypeError('Too many arguments')
if '_class' in kws:
self._class = kws['_class']
del kws['_class']
else:
self._class = Message
if 'strict' in kws:
warnings.warn("'strict' argument is deprecated (and ignored)",
DeprecationWarning, 2)
del kws['strict']
if kws:
raise TypeError('Unexpected keyword arguments')
def parse(self, fp, headersonly=False):
"""Create a message structure from the data in a file.
Reads all the data from the file and returns the root of the message
structure. Optional headersonly is a flag specifying whether to stop
parsing after reading the headers or not. The default is False,
meaning it parses the entire contents of the file.
"""
feedparser = FeedParser(self._class)
if headersonly:
feedparser._set_headersonly()
while True:
data = fp.read(8192)
if not data:
break
# XXX When Guido fixes TextIOWrapper.read() to act just like
# .readlines(), this...
feedparser.feed(str(data))
# ...gets reverted back to
#feedparser.feed(data)
return feedparser.close()
def parsestr(self, text, headersonly=False):
"""Create a message structure from a string.
Returns the root of the message structure. Optional headersonly is a
flag specifying whether to stop parsing after reading the headers or
not. The default is False, meaning it parses the entire contents of
the file.
"""
return self.parse(StringIO(text), headersonly=headersonly)
class HeaderParser(Parser):
def parse(self, fp, headersonly=True):
return Parser.parse(self, fp, True)
def parsestr(self, text, headersonly=True):
return Parser.parsestr(self, text, True)

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# Copyright (C) 2001-2006 Python Software Foundation
# Author: Ben Gertzfield
# Contact: email-sig@python.org
"""Quoted-printable content transfer encoding per RFCs 2045-2047.
This module handles the content transfer encoding method defined in RFC 2045
to encode US ASCII-like 8-bit data called `quoted-printable'. It is used to
safely encode text that is in a character set similar to the 7-bit US ASCII
character set, but that includes some 8-bit characters that are normally not
allowed in email bodies or headers.
Quoted-printable is very space-inefficient for encoding binary files; use the
email.base64MIME module for that instead.
This module provides an interface to encode and decode both headers and bodies
with quoted-printable encoding.
RFC 2045 defines a method for including character set information in an
`encoded-word' in a header. This method is commonly used for 8-bit real names
in To:/From:/Cc: etc. fields, as well as Subject: lines.
This module does not do the line wrapping or end-of-line character
conversion necessary for proper internationalized headers; it only
does dumb encoding and decoding. To deal with the various line
wrapping issues, use the email.Header module.
"""
__all__ = [
'body_decode',
'body_encode',
'body_quopri_check',
'body_quopri_len',
'decode',
'decodestring',
'encode',
'encodestring',
'header_decode',
'header_encode',
'header_quopri_check',
'header_quopri_len',
'quote',
'unquote',
]
import re
from string import ascii_letters, digits, hexdigits
from email.utils import fix_eols
CRLF = '\r\n'
NL = '\n'
EMPTYSTRING = ''
# See also Charset.py
MISC_LEN = 7
HEADER_SAFE_BYTES = b'-!*+/ ' + bytes(ascii_letters) + bytes(digits)
BODY_SAFE_BYTES = (b' !"#$%&\'()*+,-./0123456789:;<>'
b'?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`'
b'abcdefghijklmnopqrstuvwxyz{|}~\t')
# Helpers
def header_quopri_check(c):
"""Return True if the character should be escaped with header quopri."""
return c not in HEADER_SAFE_BYTES
def body_quopri_check(c):
"""Return True if the character should be escaped with body quopri."""
return c not in BODY_SAFE_BYTES
def header_quopri_len(bytearray):
"""Return the length of bytearray when it is encoded with header quopri.
Note that this does not include any RFC 2047 chrome added by
`header_encode()`.
"""
count = 0
for c in bytearray:
count += (3 if header_quopri_check(c) else 1)
return count
def body_quopri_len(bytearray):
"""Return the length of bytearray when it is encoded with body quopri."""
count = 0
for c in bytearray:
count += (3 if body_quopri_check(c) else 1)
return count
def _max_append(L, s, maxlen, extra=''):
if not isinstance(s, str):
s = chr(s)
if not L:
L.append(s.lstrip())
elif len(L[-1]) + len(s) <= maxlen:
L[-1] += extra + s
else:
L.append(s.lstrip())
def unquote(s):
"""Turn a string in the form =AB to the ASCII character with value 0xab"""
return chr(int(s[1:3], 16))
def quote(c):
return '=%02X' % ord(c)
def header_encode(header_bytes, charset='iso-8859-1'):
"""Encode a single header line with quoted-printable (like) encoding.
Defined in RFC 2045, this `Q' encoding is similar to quoted-printable, but
used specifically for email header fields to allow charsets with mostly 7
bit characters (and some 8 bit) to remain more or less readable in non-RFC
2045 aware mail clients.
charset names the character set to use in the RFC 2046 header. It
defaults to iso-8859-1.
"""
# Return empty headers unchanged
if not header_bytes:
return str(header_bytes)
# Iterate over every byte, encoding if necessary.
encoded = []
for character in header_bytes:
# Space may be represented as _ instead of =20 for readability
if character == ord(' '):
encoded.append('_')
# These characters can be included verbatim.
elif not header_quopri_check(character):
encoded.append(chr(character))
# Otherwise, replace with hex value like =E2
else:
encoded.append('=%02X' % character)
# Now add the RFC chrome to each encoded chunk and glue the chunks
# together.
return '=?%s?q?%s?=' % (charset, EMPTYSTRING.join(encoded))
def encode(body, binary=False, maxlinelen=76, eol=NL):
"""Encode with quoted-printable, wrapping at maxlinelen characters.
If binary is False (the default), end-of-line characters will be converted
to the canonical email end-of-line sequence \\r\\n. Otherwise they will
be left verbatim.
Each line of encoded text will end with eol, which defaults to "\\n". Set
this to "\\r\\n" if you will be using the result of this function directly
in an email.
Each line will be wrapped at, at most, maxlinelen characters (defaults to
76 characters). Long lines will have the `soft linefeed' quoted-printable
character "=" appended to them, so the decoded text will be identical to
the original text.
"""
if not body:
return body
if not binary:
body = fix_eols(body)
# BAW: We're accumulating the body text by string concatenation. That
# can't be very efficient, but I don't have time now to rewrite it. It
# just feels like this algorithm could be more efficient.
encoded_body = ''
lineno = -1
# Preserve line endings here so we can check later to see an eol needs to
# be added to the output later.
lines = body.splitlines(1)
for line in lines:
# But strip off line-endings for processing this line.
if line.endswith(CRLF):
line = line[:-2]
elif line[-1] in CRLF:
line = line[:-1]
lineno += 1
encoded_line = ''
prev = None
linelen = len(line)
# Now we need to examine every character to see if it needs to be
# quopri encoded. BAW: again, string concatenation is inefficient.
for j in range(linelen):
c = line[j]
prev = c
if body_quopri_check(c):
c = quote(c)
elif j+1 == linelen:
# Check for whitespace at end of line; special case
if c not in ' \t':
encoded_line += c
prev = c
continue
# Check to see to see if the line has reached its maximum length
if len(encoded_line) + len(c) >= maxlinelen:
encoded_body += encoded_line + '=' + eol
encoded_line = ''
encoded_line += c
# Now at end of line..
if prev and prev in ' \t':
# Special case for whitespace at end of file
if lineno + 1 == len(lines):
prev = quote(prev)
if len(encoded_line) + len(prev) > maxlinelen:
encoded_body += encoded_line + '=' + eol + prev
else:
encoded_body += encoded_line + prev
# Just normal whitespace at end of line
else:
encoded_body += encoded_line + prev + '=' + eol
encoded_line = ''
# Now look at the line we just finished and it has a line ending, we
# need to add eol to the end of the line.
if lines[lineno].endswith(CRLF) or lines[lineno][-1] in CRLF:
encoded_body += encoded_line + eol
else:
encoded_body += encoded_line
encoded_line = ''
return encoded_body
# For convenience and backwards compatibility w/ standard base64 module
body_encode = encode
encodestring = encode
# BAW: I'm not sure if the intent was for the signature of this function to be
# the same as base64MIME.decode() or not...
def decode(encoded, eol=NL):
"""Decode a quoted-printable string.
Lines are separated with eol, which defaults to \\n.
"""
if not encoded:
return encoded
# BAW: see comment in encode() above. Again, we're building up the
# decoded string with string concatenation, which could be done much more
# efficiently.
decoded = ''
for line in encoded.splitlines():
line = line.rstrip()
if not line:
decoded += eol
continue
i = 0
n = len(line)
while i < n:
c = line[i]
if c != '=':
decoded += c
i += 1
# Otherwise, c == "=". Are we at the end of the line? If so, add
# a soft line break.
elif i+1 == n:
i += 1
continue
# Decode if in form =AB
elif i+2 < n and line[i+1] in hexdigits and line[i+2] in hexdigits:
decoded += unquote(line[i:i+3])
i += 3
# Otherwise, not in form =AB, pass literally
else:
decoded += c
i += 1
if i == n:
decoded += eol
# Special case if original string did not end with eol
if not encoded.endswith(eol) and decoded.endswith(eol):
decoded = decoded[:-1]
return decoded
# For convenience and backwards compatibility w/ standard base64 module
body_decode = decode
decodestring = decode
def _unquote_match(match):
"""Turn a match in the form =AB to the ASCII character with value 0xab"""
s = match.group(0)
return unquote(s)
# Header decoding is done a bit differently
def header_decode(s):
"""Decode a string encoded with RFC 2045 MIME header `Q' encoding.
This function does not parse a full MIME header value encoded with
quoted-printable (like =?iso-8895-1?q?Hello_World?=) -- please use
the high level email.Header class for that functionality.
"""
s = s.replace('_', ' ')
return re.sub(r'=\w{2}', _unquote_match, s)

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@ -0,0 +1,19 @@
Return-Path: <bbb@zzz.org>
Delivered-To: bbb@zzz.org
Received: by mail.zzz.org (Postfix, from userid 889)
id 27CEAD38CC; Fri, 4 May 2001 14:05:44 -0400 (EDT)
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Message-ID: <15090.61304.110929.45684@aaa.zzz.org>
From: bbb@ddd.com (John X. Doe)
To: bbb@zzz.org
Subject: This is a test message
Date: Fri, 4 May 2001 14:05:44 -0400
Hi,
Do you like this message?
-Me

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@ -0,0 +1,135 @@
MIME-version: 1.0
From: ppp-request@zzz.org
Sender: ppp-admin@zzz.org
To: ppp@zzz.org
Subject: Ppp digest, Vol 1 #2 - 5 msgs
Date: Fri, 20 Apr 2001 20:18:00 -0400 (EDT)
X-Mailer: Mailman v2.0.4
X-Mailman-Version: 2.0.4
Content-Type: multipart/mixed; boundary="192.168.1.2.889.32614.987812255.500.21814"
--192.168.1.2.889.32614.987812255.500.21814
Content-type: text/plain; charset=us-ascii
Content-description: Masthead (Ppp digest, Vol 1 #2)
Send Ppp mailing list submissions to
ppp@zzz.org
To subscribe or unsubscribe via the World Wide Web, visit
http://www.zzz.org/mailman/listinfo/ppp
or, via email, send a message with subject or body 'help' to
ppp-request@zzz.org
You can reach the person managing the list at
ppp-admin@zzz.org
When replying, please edit your Subject line so it is more specific
than "Re: Contents of Ppp digest..."
--192.168.1.2.889.32614.987812255.500.21814
Content-type: text/plain; charset=us-ascii
Content-description: Today's Topics (5 msgs)
Today's Topics:
1. testing #1 (Barry A. Warsaw)
2. testing #2 (Barry A. Warsaw)
3. testing #3 (Barry A. Warsaw)
4. testing #4 (Barry A. Warsaw)
5. testing #5 (Barry A. Warsaw)
--192.168.1.2.889.32614.987812255.500.21814
Content-Type: multipart/digest; boundary="__--__--"
--__--__--
Message: 1
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Date: Fri, 20 Apr 2001 20:16:13 -0400
To: ppp@zzz.org
From: barry@digicool.com (Barry A. Warsaw)
Subject: [Ppp] testing #1
Precedence: bulk
hello
--__--__--
Message: 2
Date: Fri, 20 Apr 2001 20:16:21 -0400
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
To: ppp@zzz.org
From: barry@digicool.com (Barry A. Warsaw)
Precedence: bulk
hello
--__--__--
Message: 3
Date: Fri, 20 Apr 2001 20:16:25 -0400
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
To: ppp@zzz.org
From: barry@digicool.com (Barry A. Warsaw)
Subject: [Ppp] testing #3
Precedence: bulk
hello
--__--__--
Message: 4
Date: Fri, 20 Apr 2001 20:16:28 -0400
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
To: ppp@zzz.org
From: barry@digicool.com (Barry A. Warsaw)
Subject: [Ppp] testing #4
Precedence: bulk
hello
--__--__--
Message: 5
Date: Fri, 20 Apr 2001 20:16:32 -0400
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
To: ppp@zzz.org
From: barry@digicool.com (Barry A. Warsaw)
Subject: [Ppp] testing #5
Precedence: bulk
hello
--__--__----
--192.168.1.2.889.32614.987812255.500.21814
Content-type: text/plain; charset=us-ascii
Content-description: Digest Footer
_______________________________________________
Ppp mailing list
Ppp@zzz.org
http://www.zzz.org/mailman/listinfo/ppp
--192.168.1.2.889.32614.987812255.500.21814--
End of Ppp Digest

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Return-Path: <bbb@zzz.org>
Delivered-To: bbb@zzz.org
Received: by mail.zzz.org (Postfix, from userid 889)
id 27CEAD38CC; Fri, 4 May 2001 14:05:44 -0400 (EDT)
Message-ID: <15090.61304.110929.45684@aaa.zzz.org>
From: bbb@ddd.com (John X. Doe)
To: bbb@zzz.org
Subject: This is a test message
Date: Fri, 4 May 2001 14:05:44 -0400
Hi,
Do you like this message?
-Me

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@ -0,0 +1,37 @@
Return-Path: <barry@python.org>
Delivered-To: barry@python.org
Received: by mail.python.org (Postfix, from userid 889)
id C2BF0D37C6; Tue, 11 Sep 2001 00:05:05 -0400 (EDT)
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="h90VIIIKmx"
Content-Transfer-Encoding: 7bit
Message-ID: <15261.36209.358846.118674@anthem.python.org>
From: barry@python.org (Barry A. Warsaw)
To: barry@python.org
Subject: a simple multipart
Date: Tue, 11 Sep 2001 00:05:05 -0400
X-Mailer: VM 6.95 under 21.4 (patch 4) "Artificial Intelligence" XEmacs Lucid
X-Attribution: BAW
X-Oblique-Strategy: Make a door into a window
--h90VIIIKmx
Content-Type: text/plain
Content-Disposition: inline;
filename="msg.txt"
Content-Transfer-Encoding: 7bit
a simple kind of mirror
to reflect upon our own
--h90VIIIKmx
Content-Type: text/plain
Content-Disposition: inline;
filename="msg.txt"
Content-Transfer-Encoding: 7bit
a simple kind of mirror
to reflect upon our own
--h90VIIIKmx--

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@ -0,0 +1,28 @@
From: foo
Subject: bar
To: baz
MIME-Version: 1.0
Content-Type: multipart/report; report-type=delivery-status;
boundary="D1690A7AC1.996856090/mail.example.com"
Message-Id: <20010803162810.0CA8AA7ACC@mail.example.com>
This is a MIME-encapsulated message.
--D1690A7AC1.996856090/mail.example.com
Content-Type: text/plain
Yadda yadda yadda
--D1690A7AC1.996856090/mail.example.com
Yadda yadda yadda
--D1690A7AC1.996856090/mail.example.com
Content-Type: message/rfc822
From: nobody@python.org
Yadda yadda yadda
--D1690A7AC1.996856090/mail.example.com--

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@ -0,0 +1,33 @@
Return-Path: <barry@python.org>
Delivered-To: barry@python.org
MIME-Version: 1.0
Content-Type: message/rfc822
Content-Description: forwarded message
Content-Transfer-Encoding: 7bit
Message-ID: <15265.9482.641338.555352@python.org>
From: barry@zope.com (Barry A. Warsaw)
Sender: barry@python.org
To: barry@python.org
Subject: forwarded message from Barry A. Warsaw
Date: Thu, 13 Sep 2001 17:28:42 -0400
X-Mailer: VM 6.95 under 21.4 (patch 4) "Artificial Intelligence" XEmacs Lucid
X-Attribution: BAW
X-Oblique-Strategy: Be dirty
X-Url: http://barry.wooz.org
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Return-Path: <barry@python.org>
Delivered-To: barry@python.org
Message-ID: <15265.9468.713530.98441@python.org>
From: barry@zope.com (Barry A. Warsaw)
Sender: barry@python.org
To: barry@python.org
Subject: testing
Date: Thu, 13 Sep 2001 17:28:28 -0400
X-Mailer: VM 6.95 under 21.4 (patch 4) "Artificial Intelligence" XEmacs Lucid
X-Attribution: BAW
X-Oblique-Strategy: Spectrum analysis
X-Url: http://barry.wooz.org

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MIME-Version: 1.0
From: Barry <barry@digicool.com>
To: Dingus Lovers <cravindogs@cravindogs.com>
Subject: Here is your dingus fish
Date: Fri, 20 Apr 2001 19:35:02 -0400
Content-Type: multipart/mixed; boundary="BOUNDARY"
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Hi there,
This is the dingus fish.
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MIME-Version: 1.0
From: Barry Warsaw <barry@zope.com>
To: Dingus Lovers <cravindogs@cravindogs.com>
Subject: Lyrics
Date: Fri, 20 Apr 2001 19:35:02 -0400
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@ -0,0 +1,24 @@
MIME-Version: 1.0
From: Barry Warsaw <barry@zope.com>
To: Dingus Lovers <cravindogs@cravindogs.com>
Subject: Lyrics
Date: Fri, 20 Apr 2001 19:35:02 -0400
Content-Type: multipart/mixed; boundary="BOUNDARY"
--BOUNDARY
Content-Type: text/plain; charset="us-ascii"
--BOUNDARY
Content-Type: text/html; charset="iso-8859-1"
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Content-Type: text/plain
--BOUNDARY
Content-Type: text/plain; charset="koi8-r"
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@ -0,0 +1,32 @@
MIME-Version: 1.0
From: Barry Warsaw <barry@zope.com>
To: Dingus Lovers <cravindogs@cravindogs.com>
Subject: Lyrics
Date: Fri, 20 Apr 2001 19:35:02 -0400
Content-Type: multipart/mixed; boundary="BOUNDARY"
--BOUNDARY
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Content-Type: message/rfc822
MIME-Version: 1.0
Subject: The enclosing message
Subject: An enclosed message
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@ -0,0 +1,36 @@
MIME-Version: 1.0
From: Barry Warsaw <barry@zope.com>
To: Dingus Lovers <cravindogs@cravindogs.com>
Subject: Lyrics
Date: Fri, 20 Apr 2001 19:35:02 -0400
Content-Type: multipart/mixed; boundary="BOUNDARY"
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@ -0,0 +1,38 @@
MIME-Version: 1.0
From: Barry Warsaw <barry@zope.com>
To: Dingus Lovers <cravindogs@cravindogs.com>
Subject: Lyrics
Date: Fri, 20 Apr 2001 19:35:02 -0400
Content-Type: multipart/mixed; boundary="BOUNDARY"
--BOUNDARY
Content-Type: text/plain; charset="us-ascii"
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Content-Type: text/html; charset="iso-8859-1"
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@ -0,0 +1,94 @@
MIME-Version: 1.0
From: Barry <barry@digicool.com>
To: Dingus Lovers <cravindogs@cravindogs.com>
Subject: Here is your dingus fish
Date: Fri, 20 Apr 2001 19:35:02 -0400
Content-Type: multipart/mixed; boundary="OUTER"
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A text/plain part
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Hi there,
This is the dingus fish.
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@ -0,0 +1,23 @@
Return-Path: <bbb@zzz.org>
Delivered-To: bbb@zzz.org
Received: by mail.zzz.org (Postfix, from userid 889)
id 27CEAD38CC; Fri, 4 May 2001 14:05:44 -0400 (EDT)
MIME-Version: 1.0
Content-Type: text; charset=us-ascii
Content-Transfer-Encoding: 7bit
Message-ID: <15090.61304.110929.45684@aaa.zzz.org>
From: bbb@ddd.com (John X. Doe)
To: bbb@zzz.org
Subject: This is a test message
Date: Fri, 4 May 2001 14:05:44 -0400
Hi,
I'm sorry but I'm using a drainbread ISP, which although big and
wealthy can't seem to generate standard compliant email. :(
This message has a Content-Type: header with no subtype. I hope you
can still read it.
-Me

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@ -0,0 +1,52 @@
Return-Path: <xx@xx.dk>
Received: from fepD.post.tele.dk (195.41.46.149) by mail.groupcare.dk (LSMTP for Windows NT v1.1b) with SMTP id <0.0014F8A2@mail.groupcare.dk>; Mon, 30 Apr 2001 12:17:50 +0200
User-Agent: Microsoft-Outlook-Express-Macintosh-Edition/5.02.2106
Subject: XX
From: xx@xx.dk
To: XX
Message-ID: <xxxx>
Mime-version: 1.0
Content-type: multipart/mixed;
boundary="MS_Mac_OE_3071477847_720252_MIME_Part"
> Denne meddelelse er i MIME-format. Da dit postl¾sningsprogram ikke forstŒr dette format, kan del af eller hele meddelelsen v¾re ul¾selig.
--MS_Mac_OE_3071477847_720252_MIME_Part
Content-type: multipart/alternative;
boundary="MS_Mac_OE_3071477847_720252_MIME_Part"
--MS_Mac_OE_3071477847_720252_MIME_Part
Content-type: text/plain; charset="ISO-8859-1"
Content-transfer-encoding: quoted-printable
Some removed test.
--MS_Mac_OE_3071477847_720252_MIME_Part
Content-type: text/html; charset="ISO-8859-1"
Content-transfer-encoding: quoted-printable
<HTML>
<HEAD>
<TITLE>Some removed HTML</TITLE>
</HEAD>
<BODY>
Some removed text.
</BODY>
</HTML>
--MS_Mac_OE_3071477847_720252_MIME_Part--
--MS_Mac_OE_3071477847_720252_MIME_Part
Content-type: image/gif; name="xx.gif";
x-mac-creator="6F676C65";
x-mac-type="47494666"
Content-disposition: attachment
Content-transfer-encoding: base64
Some removed base64 encoded chars.
--MS_Mac_OE_3071477847_720252_MIME_Part--

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Return-Path: <>
Delivered-To: scr-admin@socal-raves.org
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Date: Sun, 23 Sep 2001 20:14:35 -0700 (PDT)
From: Internet Mail Delivery <postmaster@ucla.edu>
Subject: Delivery Notification: Delivery has failed
To: scr-admin@socal-raves.org
Message-id: <0GK500B04D0B8X@cougar.noc.ucla.edu>
MIME-version: 1.0
Sender: scr-owner@socal-raves.org
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Content-type: text/plain; charset=ISO-8859-1
This report relates to a message you sent with the following header fields:
Message-id: <002001c144a6$8752e060$56104586@oxy.edu>
Date: Sun, 23 Sep 2001 20:10:55 -0700
From: "Ian T. Henry" <henryi@oxy.edu>
To: SoCal Raves <scr@socal-raves.org>
Subject: [scr] yeah for Ians!!
Your message cannot be delivered to the following recipients:
Recipient address: jangel1@cougar.noc.ucla.edu
Reason: recipient reached disk quota
--Boundary_(ID_PGS2F2a+z+/jL7hupKgRhA)
Content-type: message/DELIVERY-STATUS
Original-envelope-id: 0GK500B4HD0888@cougar.noc.ucla.edu
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Action: failed
Status: 5.0.0 (recipient reached disk quota)
Original-recipient: rfc822;jangel1@cougar.noc.ucla.edu
Final-recipient: rfc822;jangel1@cougar.noc.ucla.edu
--Boundary_(ID_PGS2F2a+z+/jL7hupKgRhA)
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Date: Sun, 23 Sep 2001 20:10:55 -0700
From: "Ian T. Henry" <henryi@oxy.edu>
Subject: [scr] yeah for Ians!!
Sender: scr-admin@socal-raves.org
To: SoCal Raves <scr@socal-raves.org>
Errors-to: scr-admin@socal-raves.org
Message-id: <002001c144a6$8752e060$56104586@oxy.edu>
MIME-version: 1.0
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I always love to find more Ian's that are over 3 years old!!
Ian
_______________________________________________
For event info, list questions, or to unsubscribe, see http://www.socal-raves.org/
--Boundary_(ID_PGS2F2a+z+/jL7hupKgRhA)--

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@ -0,0 +1,12 @@
MIME-Version: 1.0
From: Barry <barry@digicool.com>
To: Dingus Lovers <cravindogs@cravindogs.com>
Subject: Here is your dingus fish
Date: Fri, 20 Apr 2001 19:35:02 -0400
Content-Type: multipart/mixed; boundary="BOUNDARY"
Hi there,
This is the dingus fish.
[Non-text (image/gif) part of message omitted, filename dingusfish.gif]

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@ -0,0 +1,6 @@
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
X-Foobar-Spoink-Defrobnit: wasnipoop; giraffes="very-long-necked-animals";
spooge="yummy"; hippos="gargantuan"; marshmallows="gooey"

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@ -0,0 +1,43 @@
Send Ppp mailing list submissions to
ppp@zzz.org
To subscribe or unsubscribe via the World Wide Web, visit
http://www.zzz.org/mailman/listinfo/ppp
or, via email, send a message with subject or body 'help' to
ppp-request@zzz.org
You can reach the person managing the list at
ppp-admin@zzz.org
When replying, please edit your Subject line so it is more specific
than "Re: Contents of Ppp digest..."
Today's Topics:
1. testing #1 (Barry A. Warsaw)
2. testing #2 (Barry A. Warsaw)
3. testing #3 (Barry A. Warsaw)
4. testing #4 (Barry A. Warsaw)
5. testing #5 (Barry A. Warsaw)
hello
hello
hello
hello
hello
_______________________________________________
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@ -0,0 +1,22 @@
Return-Path: <bbb@zzz.org>
Delivered-To: bbb@zzz.org
Received: by mail.zzz.org (Postfix, from userid 889)
id 27CEAD38CC; Fri, 4 May 2001 14:05:44 -0400 (EDT)
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Message-ID: <15090.61304.110929.45684@aaa.zzz.org>
From: bbb@ddd.com (John X. Doe)
To: bbb@zzz.org
Cc: ccc@zzz.org
CC: ddd@zzz.org
cc: eee@zzz.org
Subject: This is a test message
Date: Fri, 4 May 2001 14:05:44 -0400
Hi,
Do you like this message?
-Me

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@ -0,0 +1,20 @@
From: aperson@dom.ain
To: bperson@dom.ain
Subject: Test
Content-Type: multipart/mixed; boundary="BOUNDARY"
MIME message
--BOUNDARY
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
One
--BOUNDARY
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Two
--BOUNDARY--
End of MIME message

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@ -0,0 +1,46 @@
Mime-Version: 1.0
Message-Id: <a05001902b7f1c33773e9@[134.84.183.138]>
Date: Tue, 16 Oct 2001 13:59:25 +0300
To: a@example.com
From: b@example.com
Content-Type: multipart/mixed; boundary="============_-1208892523==_============"
--============_-1208892523==_============
Content-Type: text/plain; charset="us-ascii" ; format="flowed"
Text text text.
--============_-1208892523==_============
Content-Id: <a05001902b7f1c33773e9@[134.84.183.138].0.0>
Content-Type: image/jpeg; name="wibble.JPG"
; x-mac-type="4A504547"
; x-mac-creator="474B4F4E"
Content-Disposition: attachment; filename="wibble.JPG"
Content-Transfer-Encoding: base64
/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEB
AQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQH/wAALCAXABIEBAREA
g6bCjjw/pIZSjO6FWFpldjySOmCNrO7DBZibUXhTwtCixw+GtAijVdqxxaPp0aKvmGXa
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4wQRj0wQCMdCAewpaKKK/9k=
--============_-1208892523==_============
Content-Id: <a05001902b7f1c33773e9@[134.84.183.138].0.1>
Content-Type: image/jpeg; name="wibble2.JPG"
; x-mac-type="4A504547"
; x-mac-creator="474B4F4E"
Content-Disposition: attachment; filename="wibble2.JPG"
Content-Transfer-Encoding: base64
/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEB
AQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQH/wAALCAXABJ0BAREA
/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAAAgEDAwIEAwUFBAQA
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0ShxIXM43uC3/9k=
--============_-1208892523==_============
Content-Type: text/plain; charset="us-ascii" ; format="flowed"
Text text text.
--============_-1208892523==_============--

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From: aperson@dom.ain
Content-Type: multipart/mixed; boundary="BOUNDARY"
--BOUNDARY
Content-Type: text/plain
A message part
--BOUNDARY--

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@ -0,0 +1,10 @@
Content-Type: multipart/mixed; boundary="BOUNDARY"
MIME-Version: 1.0
Subject: A subject
To: aperson@dom.ain
From: bperson@dom.ain
--BOUNDARY
--BOUNDARY--

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From MAILER-DAEMON Fri Apr 06 16:46:09 2001
Received: from [204.245.199.98] (helo=zinfandel.lacita.com)
by www.linux.org.uk with esmtp (Exim 3.13 #1)
id 14lYR6-0008Iv-00
for linuxuser-admin@www.linux.org.uk; Fri, 06 Apr 2001 16:46:09 +0100
Received: from localhost (localhost) by zinfandel.lacita.com (8.7.3/8.6.10-MT4.00) with internal id JAB03225; Fri, 6 Apr 2001 09:23:06 -0800 (GMT-0800)
Date: Fri, 6 Apr 2001 09:23:06 -0800 (GMT-0800)
From: Mail Delivery Subsystem <MAILER-DAEMON@zinfandel.lacita.com>
Subject: Returned mail: Too many hops 19 (17 max): from <linuxuser-admin@www.linux.org.uk> via [199.164.235.226], to <scoffman@wellpartner.com>
Message-Id: <200104061723.JAB03225@zinfandel.lacita.com>
To: <linuxuser-admin@www.linux.org.uk>
To: postmaster@zinfandel.lacita.com
MIME-Version: 1.0
Content-Type: multipart/report; report-type=delivery-status;
bo
Auto-Submitted: auto-generated (failure)
This is a MIME-encapsulated message
--JAB03225.986577786/zinfandel.lacita.com
The original message was received at Fri, 6 Apr 2001 09:23:03 -0800 (GMT-0800)
from [199.164.235.226]
----- The following addresses have delivery notifications -----
<scoffman@wellpartner.com> (unrecoverable error)
----- Transcript of session follows -----
554 Too many hops 19 (17 max): from <linuxuser-admin@www.linux.org.uk> via [199.164.235.226], to <scoffman@wellpartner.com>
--JAB03225.986577786/zinfandel.lacita.com
Content-Type: message/delivery-status
Reporting-MTA: dns; zinfandel.lacita.com
Received-From-MTA: dns; [199.164.235.226]
Arrival-Date: Fri, 6 Apr 2001 09:23:03 -0800 (GMT-0800)
Final-Recipient: rfc822; scoffman@wellpartner.com
Action: failed
Status: 5.4.6
Last-Attempt-Date: Fri, 6 Apr 2001 09:23:06 -0800 (GMT-0800)
--JAB03225.986577786/zinfandel.lacita.com
Content-Type: text/rfc822-headers
Return-Path: linuxuser-admin@www.linux.org.uk
Received: from ns1.wellpartner.net ([199.164.235.226]) by zinfandel.lacita.com (8.7.3/8.6.10-MT4.00) with ESMTP id JAA03225 for <scoffman@wellpartner.com>; Fri, 6 Apr 2001 09:23:03 -0800 (GMT-0800)
Received: from zinfandel.lacita.com ([204.245.199.98])
by
fo
Received: from ns1.wellpartner.net ([199.164.235.226]) by zinfandel.lacita.com (8.7.3/8.6.10-MT4.00) with ESMTP id JAA03221 for <scoffman@wellpartner.com>; Fri, 6 Apr 2001 09:22:18 -0800 (GMT-0800)
Received: from zinfandel.lacita.com ([204.245.199.98])
by
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by
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Received: from www.linux.org.uk (parcelfarce.linux.theplanet.co.uk [195.92.249.252])
by
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([
by
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by
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by
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From: Daniel James <daniel@linuxuser.co.uk>
Organization: LinuxUser
To: linuxuser@www.linux.org.uk
X-Mailer: KMail [version 1.1.99]
Content-Type: text/plain;
c
MIME-Version: 1.0
Message-Id: <01040616033903.00962@server>
Content-Transfer-Encoding: 8bit
Subject: [LinuxUser] bulletin no. 45
Sender: linuxuser-admin@www.linux.org.uk
Errors-To: linuxuser-admin@www.linux.org.uk
X-BeenThere: linuxuser@www.linux.org.uk
X-Mailman-Version: 2.0.3
Precedence: bulk
List-Help: <mailto:linuxuser-request@www.linux.org.uk?subject=help>
List-Post: <mailto:linuxuser@www.linux.org.uk>
List-Subscribe: <http://www.linux.org.uk/mailman/listinfo/linuxuser>,
<m
List-Id: bulletins from LinuxUser magazine <linuxuser.www.linux.org.uk>
List-Unsubscribe: <http://www.linux.org.uk/mailman/listinfo/linuxuser>,
<m
List-Archive: <http://www.linux.org.uk/pipermail/linuxuser/>
Date: Fri, 6 Apr 2001 16:03:39 +0100
--JAB03225.986577786/zinfandel.lacita.com--

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@ -0,0 +1,45 @@
Received: from xcar [192.168.0.2] by jeeves.wooster.local
(SMTPD32-7.07 EVAL) id AFF92F0214; Sun, 12 May 2002 08:55:37 +0100
Date: Sun, 12 May 2002 08:56:15 +0100
From: Father Time <father.time@xcar.wooster.local>
To: timbo@jeeves.wooster.local
Subject: IMAP file test
Message-ID: <6df65d354b.father.time@rpc.wooster.local>
X-Organization: Home
User-Agent: Messenger-Pro/2.50a (MsgServe/1.50) (RISC-OS/4.02) POPstar/2.03
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="1618492860--2051301190--113853680"
Status: R
X-UIDL: 319998302
This message is in MIME format which your mailer apparently does not support.
You either require a newer version of your software which supports MIME, or
a separate MIME decoding utility. Alternatively, ask the sender of this
message to resend it in a different format.
--1618492860--2051301190--113853680
Content-Type: text/plain; charset=us-ascii
Simple email with attachment.
--1618492860--2051301190--113853680
Content-Type: application/riscos; name="clock.bmp,69c"; type=BMP; load=&fff69c4b; exec=&355dd4d1; access=&03
Content-Disposition: attachment; filename="clock.bmp"
Content-Transfer-Encoding: base64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--1618492860--2051301190--113853680--

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@ -0,0 +1,15 @@
Return-Path: <aperson@dom.ain>
Received: by mail.dom.ain (Postfix, from userid 889)
id B9D0AD35DB; Tue, 4 Jun 2002 21:46:59 -0400 (EDT)
Message-ID: <15613.28051.707126.569693@dom.ain>
Date: Tue, 4 Jun 2002 21:46:59 -0400
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Subject: bug demonstration
12345678911234567892123456789312345678941234567895123456789612345678971234567898112345678911234567892123456789112345678911234567892123456789
more text
From: aperson@dom.ain (Anne P. Erson)
To: bperson@dom.ain (Barney P. Erson)
test

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@ -0,0 +1,25 @@
From: aperson@dom.ain
MIME-Version: 1.0
Content-Type: multipart/digest; boundary=BOUNDARY
--BOUNDARY
Content-Type: message/rfc822
Content-Type: text/plain; charset=us-ascii
To: aa@bb.org
From: cc@dd.org
Subject: ee
message 1
--BOUNDARY
Content-Type: message/rfc822
Content-Type: text/plain; charset=us-ascii
To: aa@bb.org
From: cc@dd.org
Subject: ee
message 2
--BOUNDARY--

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@ -0,0 +1,22 @@
Return-Path: <bbb@zzz.org>
Delivered-To: bbb@zzz.org
Received: by mail.zzz.org (Postfix, from userid 889)
id 27CEAD38CC; Fri, 4 May 2001 14:05:44 -0400 (EDT)
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii;
title*0*="us-ascii'en'This%20is%20even%20more%20";
title*1*="%2A%2A%2Afun%2A%2A%2A%20";
title*2="isn't it!"
Content-Transfer-Encoding: 7bit
Message-ID: <15090.61304.110929.45684@aaa.zzz.org>
From: bbb@ddd.com (John X. Doe)
To: bbb@zzz.org
Subject: This is a test message
Date: Fri, 4 May 2001 14:05:44 -0400
Hi,
Do you like this message?
-Me

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@ -0,0 +1,23 @@
From: aperson@dom.ain
MIME-Version: 1.0
Content-Type: multipart/digest; boundary=BOUNDARY
--BOUNDARY
Content-Type: text/plain; charset=us-ascii
To: aa@bb.org
From: cc@dd.org
Subject: ee
message 1
--BOUNDARY
Content-Type: text/plain; charset=us-ascii
To: aa@bb.org
From: cc@dd.org
Subject: ee
message 2
--BOUNDARY--

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@ -0,0 +1,15 @@
From: aperson@dom.ain
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary=BOUNDARY_
--BOUNDARY
Content-Type: text/plain
message 1
--BOUNDARY
Content-Type: text/plain
message 2
--BOUNDARY--

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@ -0,0 +1,14 @@
Delivered-To: freebsd-isp@freebsd.org
Date: Tue, 26 Sep 2000 12:23:03 -0500
From: Anne Person <aperson@example.com>
To: Barney Dude <bdude@example.com>
Subject: Re: Limiting Perl CPU Utilization...
Mime-Version: 1.0
Content-Type: text/plain; charset*=ansi-x3.4-1968''us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.3.8i
Sender: owner-freebsd-isp@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org
Some message.

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@ -0,0 +1,29 @@
Delivered-To: freebsd-isp@freebsd.org
Date: Wed, 27 Sep 2000 11:11:09 -0500
From: Anne Person <aperson@example.com>
To: Barney Dude <bdude@example.com>
Subject: Re: Limiting Perl CPU Utilization...
Mime-Version: 1.0
Content-Type: multipart/signed; micalg*=ansi-x3.4-1968''pgp-md5;
protocol*=ansi-x3.4-1968''application%2Fpgp-signature;
boundary*="ansi-x3.4-1968''EeQfGwPcQSOJBaQU"
Content-Disposition: inline
Sender: owner-freebsd-isp@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org
--EeQfGwPcQSOJBaQU
Content-Type: text/plain; charset*=ansi-x3.4-1968''us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
part 1
--EeQfGwPcQSOJBaQU
Content-Type: text/plain
Content-Disposition: inline
part 2
--EeQfGwPcQSOJBaQU--

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@ -0,0 +1,19 @@
From: aperson@dom.ain
To: bperson@dom.ain
Content-Type: multipart/digest; boundary=XYZ
--XYZ
Content-Type: text/plain
This is a text plain part that is counter to recommended practice in
RFC 2046, $5.1.5, but is not illegal
--XYZ
From: cperson@dom.ain
To: dperson@dom.ain
A submessage
--XYZ--

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@ -0,0 +1,4 @@
From: aperson@dom.ain
To: bperson@dom.ain
Subject: here's something interesting
counter to RFC 2822, there's no separating newline here

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@ -0,0 +1,40 @@
Mime-Version: 1.0
Content-Type: Multipart/Mixed; Boundary="NextPart"
To: IETF-Announce:;
From: Internet-Drafts@ietf.org
Subject: I-D ACTION:draft-ietf-mboned-mix-00.txt
Date: Tue, 22 Dec 1998 16:55:06 -0500
--NextPart
Blah blah blah
--NextPart
Content-Type: Multipart/Alternative; Boundary="OtherAccess"
--OtherAccess
Content-Type: Message/External-body;
access-type="mail-server";
server="mailserv@ietf.org"
Content-Type: text/plain
Content-ID: <19981222151406.I-D@ietf.org>
ENCODING mime
FILE /internet-drafts/draft-ietf-mboned-mix-00.txt
--OtherAccess
Content-Type: Message/External-body;
name="draft-ietf-mboned-mix-00.txt";
site="ftp.ietf.org";
access-type="anon-ftp";
directory="internet-drafts"
Content-Type: text/plain
Content-ID: <19981222151406.I-D@ietf.org>
--OtherAccess--
--NextPart--

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@ -0,0 +1,22 @@
Content-Type: multipart/mixed; boundary=ABCDE
--ABCDE
Content-Type: text/x-one
Blah
--ABCDE
--ABCDE
Content-Type: text/x-two
Blah
--ABCDE
--ABCDE
--ABCDE
--ABCDE
Content-Type: text/x-two
Blah
--ABCDE--

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@ -0,0 +1,101 @@
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="----- =_aaaaaaaaaa0"
------- =_aaaaaaaaaa0
Content-Type: multipart/mixed; boundary="----- =_aaaaaaaaaa1"
Content-ID: <20592.1022586929.1@example.com>
------- =_aaaaaaaaaa1
Content-Type: multipart/alternative; boundary="----- =_aaaaaaaaaa2"
Content-ID: <20592.1022586929.2@example.com>
------- =_aaaaaaaaaa2
Content-Type: text/plain
Content-ID: <20592.1022586929.3@example.com>
Content-Description: very tricky
Content-Transfer-Encoding: 7bit
Unlike the test test_nested-multiples-with-internal-boundary, this
piece of text not only contains the outer boundary tags
------- =_aaaaaaaaaa1
and
------- =_aaaaaaaaaa0
but puts them at the start of a line! And, to be even nastier, it
even includes a couple of end tags, such as this one:
------- =_aaaaaaaaaa1--
and this one, which is from a multipart we haven't even seen yet!
------- =_aaaaaaaaaa4--
This will, I'm sure, cause much breakage of MIME parsers. But, as
far as I can tell, it's perfectly legal. I have not yet ever seen
a case of this in the wild, but I've seen *similar* things.
------- =_aaaaaaaaaa2
Content-Type: application/octet-stream
Content-ID: <20592.1022586929.4@example.com>
Content-Description: patch2
Content-Transfer-Encoding: base64
XXX
------- =_aaaaaaaaaa2--
------- =_aaaaaaaaaa1
Content-Type: multipart/alternative; boundary="----- =_aaaaaaaaaa3"
Content-ID: <20592.1022586929.6@example.com>
------- =_aaaaaaaaaa3
Content-Type: application/octet-stream
Content-ID: <20592.1022586929.7@example.com>
Content-Description: patch3
Content-Transfer-Encoding: base64
XXX
------- =_aaaaaaaaaa3
Content-Type: application/octet-stream
Content-ID: <20592.1022586929.8@example.com>
Content-Description: patch4
Content-Transfer-Encoding: base64
XXX
------- =_aaaaaaaaaa3--
------- =_aaaaaaaaaa1
Content-Type: multipart/alternative; boundary="----- =_aaaaaaaaaa4"
Content-ID: <20592.1022586929.10@example.com>
------- =_aaaaaaaaaa4
Content-Type: application/octet-stream
Content-ID: <20592.1022586929.11@example.com>
Content-Description: patch5
Content-Transfer-Encoding: base64
XXX
------- =_aaaaaaaaaa4
Content-Type: application/octet-stream
Content-ID: <20592.1022586929.12@example.com>
Content-Description: patch6
Content-Transfer-Encoding: base64
XXX
------- =_aaaaaaaaaa4--
------- =_aaaaaaaaaa1--
------- =_aaaaaaaaaa0
Content-Type: text/plain; charset="us-ascii"
Content-ID: <20592.1022586929.15@example.com>
--
It's never too late to have a happy childhood.
------- =_aaaaaaaaaa0--

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@ -0,0 +1,83 @@
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="----- =_aaaaaaaaaa0"
------- =_aaaaaaaaaa0
Content-Type: multipart/mixed; boundary="----- =_aaaaaaaaaa1"
Content-ID: <20592.1022586929.1@example.com>
------- =_aaaaaaaaaa1
Content-Type: multipart/alternative; boundary="----- =_aaaaaaaaaa1"
Content-ID: <20592.1022586929.2@example.com>
------- =_aaaaaaaaaa1
Content-Type: application/octet-stream
Content-ID: <20592.1022586929.3@example.com>
Content-Description: patch1
Content-Transfer-Encoding: base64
XXX
------- =_aaaaaaaaaa1
Content-Type: application/octet-stream
Content-ID: <20592.1022586929.4@example.com>
Content-Description: patch2
Content-Transfer-Encoding: base64
XXX
------- =_aaaaaaaaaa1--
------- =_aaaaaaaaaa1
Content-Type: multipart/alternative; boundary="----- =_aaaaaaaaaa1"
Content-ID: <20592.1022586929.6@example.com>
------- =_aaaaaaaaaa1
Content-Type: application/octet-stream
Content-ID: <20592.1022586929.7@example.com>
Content-Description: patch3
Content-Transfer-Encoding: base64
XXX
------- =_aaaaaaaaaa1
Content-Type: application/octet-stream
Content-ID: <20592.1022586929.8@example.com>
Content-Description: patch4
Content-Transfer-Encoding: base64
XXX
------- =_aaaaaaaaaa1--
------- =_aaaaaaaaaa1
Content-Type: multipart/alternative; boundary="----- =_aaaaaaaaaa1"
Content-ID: <20592.1022586929.10@example.com>
------- =_aaaaaaaaaa1
Content-Type: application/octet-stream
Content-ID: <20592.1022586929.11@example.com>
Content-Description: patch5
Content-Transfer-Encoding: base64
XXX
------- =_aaaaaaaaaa1
Content-Type: application/octet-stream
Content-ID: <20592.1022586929.12@example.com>
Content-Description: patch6
Content-Transfer-Encoding: base64
XXX
------- =_aaaaaaaaaa1--
------- =_aaaaaaaaaa1--
------- =_aaaaaaaaaa0
Content-Type: text/plain; charset="us-ascii"
Content-ID: <20592.1022586929.15@example.com>
--
It's never too late to have a happy childhood.
------- =_aaaaaaaaaa0--

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@ -0,0 +1,10 @@
MIME-Version: 1.0
Content-Type: text/html; boundary="--961284236552522269"
----961284236552522269
Content-Type: text/html;
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From: "Allison Dunlap" <xxx@example.com>
To: yyy@example.com
Subject: 64423
Date: Sun, 11 Jul 2004 16:09:27 -0300
MIME-Version: 1.0
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Blah blah blah

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From: Mail Delivery Subsystem <xxx@example.com>
To: yyy@example.com
This is a MIME-encapsulated message
--AAA
Stuff
--AAA
Content-Type: message/rfc822
From: webmaster@python.org
To: zzz@example.com
Content-Type: multipart/mixed; boundary="BBB"
--BBB--
--AAA--

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From SRS0=aO/p=ON=bag.python.org=None@bounce2.pobox.com Fri Nov 26 21:40:36 2004
X-VM-v5-Data: ([nil nil nil nil nil nil nil nil nil]
[nil nil nil nil nil nil nil "MAILER DAEMON <>" "MAILER DAEMON <>" nil nil "Banned file: auto__mail.python.bat in mail from you" "^From:" nil nil nil nil "Banned file: auto__mail.python.bat in mail from you" nil nil nil nil nil nil nil]
nil)
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Message-Id: <edab.7804f5cb8070@python.org>
Content-Type: multipart/report; report-type=delivery-status;
charset=utf-8;
boundary="----------=_1101526904-1956-5"
X-Virus-Scanned: by XS4ALL Virus Scanner
X-UIDL: 4\G!!!<c"!UV["!M7C!!
From: MAILER DAEMON <>
To: <webmaster@python.org>
Subject: Banned file: auto__mail.python.bat in mail from you
Date: Fri, 26 Nov 2004 19:41:44 -0800 (PST)
This is a multi-part message in MIME format...
------------=_1101526904-1956-5
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Return-Path: <barry@python.org>
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Received: by mail.python.org (Postfix, from userid 889)
id C2BF0D37C6; Tue, 11 Sep 2001 00:05:05 -0400 (EDT)
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Message-ID: <15261.36209.358846.118674@anthem.python.org>
From: barry@python.org (Barry A. Warsaw)
To: barry@python.org
Subject: a simple multipart
Date: Tue, 11 Sep 2001 00:05:05 -0400
X-Mailer: VM 6.95 under 21.4 (patch 4) "Artificial Intelligence" XEmacs Lucid
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a simple kind of mirror
to reflect upon our own
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a simple kind of mirror
to reflect upon our own
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3307
Lib/email/test/test_email.py Normal file

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# Copyright (C) 2002-2006 Python Software Foundation
# Contact: email-sig@python.org
# email package unit tests for (optional) Asian codecs
import unittest
from test.test_support import TestSkipped, run_unittest
from email.test.test_email import TestEmailBase
from email.Charset import Charset
from email.Header import Header, decode_header
from email.Message import Message
# We're compatible with Python 2.3, but it doesn't have the built-in Asian
# codecs, so we have to skip all these tests.
try:
str('foo', 'euc-jp')
except LookupError:
raise TestSkipped
class TestEmailAsianCodecs(TestEmailBase):
def test_japanese_codecs(self):
eq = self.ndiffAssertEqual
j = Charset("euc-jp")
g = Charset("iso-8859-1")
h = Header("Hello World!")
jhello = '\xa5\xcf\xa5\xed\xa1\xbc\xa5\xef\xa1\xbc\xa5\xeb\xa5\xc9\xa1\xaa'
ghello = 'Gr\xfc\xdf Gott!'
h.append(jhello, j)
h.append(ghello, g)
# BAW: This used to -- and maybe should -- fold the two iso-8859-1
# chunks into a single encoded word. However it doesn't violate the
# standard to have them as two encoded chunks and maybe it's
# reasonable <wink> for each .append() call to result in a separate
# encoded word.
eq(h.encode(), """\
Hello World! =?iso-2022-jp?b?GyRCJU8lbSE8JW8hPCVrJUkhKhsoQg==?=
=?iso-8859-1?q?Gr=FC=DF?= =?iso-8859-1?q?_Gott!?=""")
eq(decode_header(h.encode()),
[('Hello World!', None),
('\x1b$B%O%m!<%o!<%k%I!*\x1b(B', 'iso-2022-jp'),
('Gr\xfc\xdf Gott!', 'iso-8859-1')])
int = 'test-ja \xa4\xd8\xc5\xea\xb9\xc6\xa4\xb5\xa4\xec\xa4\xbf\xa5\xe1\xa1\xbc\xa5\xeb\xa4\xcf\xbb\xca\xb2\xf1\xbc\xd4\xa4\xce\xbe\xb5\xc7\xa7\xa4\xf2\xc2\xd4\xa4\xc3\xa4\xc6\xa4\xa4\xa4\xde\xa4\xb9'
h = Header(int, j, header_name="Subject")
# test a very long header
enc = h.encode()
# TK: splitting point may differ by codec design and/or Header encoding
eq(enc , """\
=?iso-2022-jp?b?dGVzdC1qYSAbJEIkWEVqOUYkNSRsJD8lYSE8JWskTztKGyhC?=
=?iso-2022-jp?b?GyRCMnE8VCROPjVHJyRyQlQkQyRGJCQkXiQ5GyhC?=""")
# TK: full decode comparison
eq(h.__unicode__().encode('euc-jp'), int)
def test_payload_encoding(self):
jhello = '\xa5\xcf\xa5\xed\xa1\xbc\xa5\xef\xa1\xbc\xa5\xeb\xa5\xc9\xa1\xaa'
jcode = 'euc-jp'
msg = Message()
msg.set_payload(jhello, jcode)
ustr = str(msg.get_payload(), msg.get_content_charset())
self.assertEqual(jhello, ustr.encode(jcode))
def suite():
suite = unittest.TestSuite()
suite.addTest(unittest.makeSuite(TestEmailAsianCodecs))
return suite
def test_main():
run_unittest(TestEmailAsianCodecs)
if __name__ == '__main__':
unittest.main(defaultTest='suite')

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# Copyright (C) 2002-2006 Python Software Foundation
# Contact: email-sig@python.org
# email package unit tests for (optional) Asian codecs
import unittest
from test.test_support import TestSkipped, run_unittest
from email.test.test_email import TestEmailBase
from email.charset import Charset
from email.header import Header, decode_header
from email.message import Message
# We're compatible with Python 2.3, but it doesn't have the built-in Asian
# codecs, so we have to skip all these tests.
try:
str('foo', 'euc-jp')
except LookupError:
raise TestSkipped
class TestEmailAsianCodecs(TestEmailBase):
def test_japanese_codecs(self):
eq = self.ndiffAssertEqual
j = Charset("euc-jp")
g = Charset("iso-8859-1")
h = Header("Hello World!")
jhello = '\xa5\xcf\xa5\xed\xa1\xbc\xa5\xef\xa1\xbc\xa5\xeb\xa5\xc9\xa1\xaa'
ghello = 'Gr\xfc\xdf Gott!'
h.append(jhello, j)
h.append(ghello, g)
# BAW: This used to -- and maybe should -- fold the two iso-8859-1
# chunks into a single encoded word. However it doesn't violate the
# standard to have them as two encoded chunks and maybe it's
# reasonable <wink> for each .append() call to result in a separate
# encoded word.
eq(h.encode(), """\
Hello World! =?iso-2022-jp?b?GyRCJU8lbSE8JW8hPCVrJUkhKhsoQg==?=
=?iso-8859-1?q?Gr=FC=DF?= =?iso-8859-1?q?_Gott!?=""")
eq(decode_header(h.encode()),
[('Hello World!', None),
('\x1b$B%O%m!<%o!<%k%I!*\x1b(B', 'iso-2022-jp'),
('Gr\xfc\xdf Gott!', 'iso-8859-1')])
int = 'test-ja \xa4\xd8\xc5\xea\xb9\xc6\xa4\xb5\xa4\xec\xa4\xbf\xa5\xe1\xa1\xbc\xa5\xeb\xa4\xcf\xbb\xca\xb2\xf1\xbc\xd4\xa4\xce\xbe\xb5\xc7\xa7\xa4\xf2\xc2\xd4\xa4\xc3\xa4\xc6\xa4\xa4\xa4\xde\xa4\xb9'
h = Header(int, j, header_name="Subject")
# test a very long header
enc = h.encode()
# TK: splitting point may differ by codec design and/or Header encoding
eq(enc , """\
=?iso-2022-jp?b?dGVzdC1qYSAbJEIkWEVqOUYkNSRsJD8lYSE8JWskTztKGyhC?=
=?iso-2022-jp?b?GyRCMnE8VCROPjVHJyRyQlQkQyRGJCQkXiQ5GyhC?=""")
# TK: full decode comparison
eq(h.__unicode__().encode('euc-jp'), int)
def test_payload_encoding(self):
jhello = '\xa5\xcf\xa5\xed\xa1\xbc\xa5\xef\xa1\xbc\xa5\xeb\xa5\xc9\xa1\xaa'
jcode = 'euc-jp'
msg = Message()
msg.set_payload(jhello, jcode)
ustr = str(msg.get_payload(), msg.get_content_charset())
self.assertEqual(jhello, ustr.encode(jcode))
def suite():
suite = unittest.TestSuite()
suite.addTest(unittest.makeSuite(TestEmailAsianCodecs))
return suite
def test_main():
run_unittest(TestEmailAsianCodecs)
if __name__ == '__main__':
unittest.main(defaultTest='suite')

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# Copyright (C) 2002-2004 Python Software Foundation
#
# A torture test of the email package. This should not be run as part of the
# standard Python test suite since it requires several meg of email messages
# collected in the wild. These source messages are not checked into the
# Python distro, but are available as part of the standalone email package at
# http://sf.net/projects/mimelib
import sys
import os
import unittest
from io import StringIO
from types import ListType
from email.test.test_email import TestEmailBase
from test.test_support import TestSkipped
import email
from email import __file__ as testfile
from email.Iterators import _structure
def openfile(filename):
from os.path import join, dirname, abspath
path = abspath(join(dirname(testfile), os.pardir, 'moredata', filename))
return open(path, 'r')
# Prevent this test from running in the Python distro
try:
openfile('crispin-torture.txt')
except IOError:
raise TestSkipped
class TortureBase(TestEmailBase):
def _msgobj(self, filename):
fp = openfile(filename)
try:
msg = email.message_from_file(fp)
finally:
fp.close()
return msg
class TestCrispinTorture(TortureBase):
# Mark Crispin's torture test from the SquirrelMail project
def test_mondo_message(self):
eq = self.assertEqual
neq = self.ndiffAssertEqual
msg = self._msgobj('crispin-torture.txt')
payload = msg.get_payload()
eq(type(payload), ListType)
eq(len(payload), 12)
eq(msg.preamble, None)
eq(msg.epilogue, '\n')
# Probably the best way to verify the message is parsed correctly is to
# dump its structure and compare it against the known structure.
fp = StringIO()
_structure(msg, fp=fp)
neq(fp.getvalue(), """\
multipart/mixed
text/plain
message/rfc822
multipart/alternative
text/plain
multipart/mixed
text/richtext
application/andrew-inset
message/rfc822
audio/basic
audio/basic
image/pbm
message/rfc822
multipart/mixed
multipart/mixed
text/plain
audio/x-sun
multipart/mixed
image/gif
image/gif
application/x-be2
application/atomicmail
audio/x-sun
message/rfc822
multipart/mixed
text/plain
image/pgm
text/plain
message/rfc822
multipart/mixed
text/plain
image/pbm
message/rfc822
application/postscript
image/gif
message/rfc822
multipart/mixed
audio/basic
audio/basic
message/rfc822
multipart/mixed
application/postscript
text/plain
message/rfc822
multipart/mixed
text/plain
multipart/parallel
image/gif
audio/basic
application/atomicmail
message/rfc822
audio/x-sun
""")
def _testclasses():
mod = sys.modules[__name__]
return [getattr(mod, name) for name in dir(mod) if name.startswith('Test')]
def suite():
suite = unittest.TestSuite()
for testclass in _testclasses():
suite.addTest(unittest.makeSuite(testclass))
return suite
def test_main():
for testclass in _testclasses():
test_support.run_unittest(testclass)
if __name__ == '__main__':
unittest.main(defaultTest='suite')

325
Lib/email/utils.py Normal file
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# Copyright (C) 2001-2007 Python Software Foundation
# Author: Barry Warsaw
# Contact: email-sig@python.org
"""Miscellaneous utilities."""
__all__ = [
'collapse_rfc2231_value',
'decode_params',
'decode_rfc2231',
'encode_rfc2231',
'formataddr',
'formatdate',
'getaddresses',
'make_msgid',
'parseaddr',
'parsedate',
'parsedate_tz',
'unquote',
]
import os
import re
import time
import base64
import random
import socket
import urllib
import warnings
from io import StringIO
from email._parseaddr import quote
from email._parseaddr import AddressList as _AddressList
from email._parseaddr import mktime_tz
# We need wormarounds for bugs in these methods in older Pythons (see below)
from email._parseaddr import parsedate as _parsedate
from email._parseaddr import parsedate_tz as _parsedate_tz
from quopri import decodestring as _qdecode
# Intrapackage imports
from email.encoders import _bencode, _qencode
COMMASPACE = ', '
EMPTYSTRING = ''
UEMPTYSTRING = ''
CRLF = '\r\n'
TICK = "'"
specialsre = re.compile(r'[][\\()<>@,:;".]')
escapesre = re.compile(r'[][\\()"]')
# Helpers
def _identity(s):
return s
def _bdecode(s):
# We can't quite use base64.encodestring() since it tacks on a "courtesy
# newline". Blech!
if not s:
return s
value = base64.decodestring(s)
if not s.endswith('\n') and value.endswith('\n'):
return value[:-1]
return value
def fix_eols(s):
"""Replace all line-ending characters with \r\n."""
# Fix newlines with no preceding carriage return
s = re.sub(r'(?<!\r)\n', CRLF, s)
# Fix carriage returns with no following newline
s = re.sub(r'\r(?!\n)', CRLF, s)
return s
def formataddr(pair):
"""The inverse of parseaddr(), this takes a 2-tuple of the form
(realname, email_address) and returns the string value suitable
for an RFC 2822 From, To or Cc header.
If the first element of pair is false, then the second element is
returned unmodified.
"""
name, address = pair
if name:
quotes = ''
if specialsre.search(name):
quotes = '"'
name = escapesre.sub(r'\\\g<0>', name)
return '%s%s%s <%s>' % (quotes, name, quotes, address)
return address
def getaddresses(fieldvalues):
"""Return a list of (REALNAME, EMAIL) for each fieldvalue."""
all = COMMASPACE.join(fieldvalues)
a = _AddressList(all)
return a.addresslist
ecre = re.compile(r'''
=\? # literal =?
(?P<charset>[^?]*?) # non-greedy up to the next ? is the charset
\? # literal ?
(?P<encoding>[qb]) # either a "q" or a "b", case insensitive
\? # literal ?
(?P<atom>.*?) # non-greedy up to the next ?= is the atom
\?= # literal ?=
''', re.VERBOSE | re.IGNORECASE)
def formatdate(timeval=None, localtime=False, usegmt=False):
"""Returns a date string as specified by RFC 2822, e.g.:
Fri, 09 Nov 2001 01:08:47 -0000
Optional timeval if given is a floating point time value as accepted by
gmtime() and localtime(), otherwise the current time is used.
Optional localtime is a flag that when True, interprets timeval, and
returns a date relative to the local timezone instead of UTC, properly
taking daylight savings time into account.
Optional argument usegmt means that the timezone is written out as
an ascii string, not numeric one (so "GMT" instead of "+0000"). This
is needed for HTTP, and is only used when localtime==False.
"""
# Note: we cannot use strftime() because that honors the locale and RFC
# 2822 requires that day and month names be the English abbreviations.
if timeval is None:
timeval = time.time()
if localtime:
now = time.localtime(timeval)
# Calculate timezone offset, based on whether the local zone has
# daylight savings time, and whether DST is in effect.
if time.daylight and now[-1]:
offset = time.altzone
else:
offset = time.timezone
hours, minutes = divmod(abs(offset), 3600)
# Remember offset is in seconds west of UTC, but the timezone is in
# minutes east of UTC, so the signs differ.
if offset > 0:
sign = '-'
else:
sign = '+'
zone = '%s%02d%02d' % (sign, hours, minutes // 60)
else:
now = time.gmtime(timeval)
# Timezone offset is always -0000
if usegmt:
zone = 'GMT'
else:
zone = '-0000'
return '%s, %02d %s %04d %02d:%02d:%02d %s' % (
['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'][now[6]],
now[2],
['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'][now[1] - 1],
now[0], now[3], now[4], now[5],
zone)
def make_msgid(idstring=None):
"""Returns a string suitable for RFC 2822 compliant Message-ID, e.g:
<20020201195627.33539.96671@nightshade.la.mastaler.com>
Optional idstring if given is a string used to strengthen the
uniqueness of the message id.
"""
timeval = time.time()
utcdate = time.strftime('%Y%m%d%H%M%S', time.gmtime(timeval))
pid = os.getpid()
randint = random.randrange(100000)
if idstring is None:
idstring = ''
else:
idstring = '.' + idstring
idhost = socket.getfqdn()
msgid = '<%s.%s.%s%s@%s>' % (utcdate, pid, randint, idstring, idhost)
return msgid
# These functions are in the standalone mimelib version only because they've
# subsequently been fixed in the latest Python versions. We use this to worm
# around broken older Pythons.
def parsedate(data):
if not data:
return None
return _parsedate(data)
def parsedate_tz(data):
if not data:
return None
return _parsedate_tz(data)
def parseaddr(addr):
addrs = _AddressList(addr).addresslist
if not addrs:
return '', ''
return addrs[0]
# rfc822.unquote() doesn't properly de-backslash-ify in Python pre-2.3.
def unquote(str):
"""Remove quotes from a string."""
if len(str) > 1:
if str.startswith('"') and str.endswith('"'):
return str[1:-1].replace('\\\\', '\\').replace('\\"', '"')
if str.startswith('<') and str.endswith('>'):
return str[1:-1]
return str
# RFC2231-related functions - parameter encoding and decoding
def decode_rfc2231(s):
"""Decode string according to RFC 2231"""
parts = s.split(TICK, 2)
if len(parts) <= 2:
return None, None, s
return parts
def encode_rfc2231(s, charset=None, language=None):
"""Encode string according to RFC 2231.
If neither charset nor language is given, then s is returned as-is. If
charset is given but not language, the string is encoded using the empty
string for language.
"""
import urllib
s = urllib.quote(s, safe='')
if charset is None and language is None:
return s
if language is None:
language = ''
return "%s'%s'%s" % (charset, language, s)
rfc2231_continuation = re.compile(r'^(?P<name>\w+)\*((?P<num>[0-9]+)\*?)?$')
def decode_params(params):
"""Decode parameters list according to RFC 2231.
params is a sequence of 2-tuples containing (param name, string value).
"""
# Copy params so we don't mess with the original
params = params[:]
new_params = []
# Map parameter's name to a list of continuations. The values are a
# 3-tuple of the continuation number, the string value, and a flag
# specifying whether a particular segment is %-encoded.
rfc2231_params = {}
name, value = params.pop(0)
new_params.append((name, value))
while params:
name, value = params.pop(0)
if name.endswith('*'):
encoded = True
else:
encoded = False
value = unquote(value)
mo = rfc2231_continuation.match(name)
if mo:
name, num = mo.group('name', 'num')
if num is not None:
num = int(num)
rfc2231_params.setdefault(name, []).append((num, value, encoded))
else:
new_params.append((name, '"%s"' % quote(value)))
if rfc2231_params:
for name, continuations in rfc2231_params.items():
value = []
extended = False
# Sort by number
continuations.sort()
# And now append all values in numerical order, converting
# %-encodings for the encoded segments. If any of the
# continuation names ends in a *, then the entire string, after
# decoding segments and concatenating, must have the charset and
# language specifiers at the beginning of the string.
for num, s, encoded in continuations:
if encoded:
s = urllib.unquote(s)
extended = True
value.append(s)
value = quote(EMPTYSTRING.join(value))
if extended:
charset, language, value = decode_rfc2231(value)
new_params.append((name, (charset, language, '"%s"' % value)))
else:
new_params.append((name, '"%s"' % value))
return new_params
def collapse_rfc2231_value(value, errors='replace',
fallback_charset='us-ascii'):
if not isinstance(value, tuple) or len(value) != 3:
return unquote(value)
# While value comes to us as a unicode string, we need it to be a bytes
# object. We do not want bytes() normal utf-8 decoder, we want a straight
# interpretation of the string as character bytes.
charset, language, text = value
rawbytes = bytes(ord(c) for c in text)
try:
return str(rawbytes, charset, errors)
except LookupError:
# charset is not a known codec.
return unquote(text)