mirror of https://github.com/python/cpython
561 lines
18 KiB
Python
561 lines
18 KiB
Python
# 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.
|
|
"""
|
|
res = _parsedate_tz(data)
|
|
if not res:
|
|
return
|
|
if res[9] is None:
|
|
res[9] = 0
|
|
return tuple(res)
|
|
|
|
def _parsedate_tz(data):
|
|
"""Convert date to extended time tuple.
|
|
|
|
The last (additional) element is the time zone offset in seconds, except if
|
|
the timezone was specified as -0000. In that case the last element is
|
|
None. This indicates a UTC timestamp that explicitly declaims knowledge of
|
|
the source timezone, as opposed to a +0000 timestamp that indicates the
|
|
source timezone really was UTC.
|
|
|
|
"""
|
|
if not data:
|
|
return None
|
|
data = data.split()
|
|
if not data: # This happens for whitespace-only input.
|
|
return None
|
|
# 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 == -1:
|
|
i = s.find('-')
|
|
if i > 0:
|
|
data[3:] = [s[:i], s[i:]]
|
|
else:
|
|
data.append('') # Dummy tz
|
|
if len(data) < 5:
|
|
return None
|
|
data = data[:5]
|
|
[dd, mm, yy, tm, tz] = data
|
|
if not (dd and mm and yy):
|
|
return None
|
|
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:
|
|
return None
|
|
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
|
|
elif len(tm) == 1 and '.' in tm[0]:
|
|
# Some non-compliant MUAs use '.' to separate time elements.
|
|
tm = tm[0].split('.')
|
|
if len(tm) == 2:
|
|
[thh, tmm] = tm
|
|
tss = 0
|
|
elif len(tm) == 3:
|
|
[thh, tmm, tss] = tm
|
|
else:
|
|
return None
|
|
else:
|
|
return None
|
|
try:
|
|
yy = int(yy)
|
|
dd = int(dd)
|
|
thh = int(thh)
|
|
tmm = int(tmm)
|
|
tss = int(tss)
|
|
except ValueError:
|
|
return None
|
|
# Check for a yy specified in two-digit format, then convert it to the
|
|
# appropriate four-digit format, according to the POSIX standard. RFC 822
|
|
# calls for a two-digit yy, but RFC 2822 (which obsoletes RFC 822)
|
|
# mandates a 4-digit yy. For more information, see the documentation for
|
|
# the time module.
|
|
if yy < 100:
|
|
# The year is between 1969 and 1999 (inclusive).
|
|
if yy > 68:
|
|
yy += 1900
|
|
# The year is between 2000 and 2068 (inclusive).
|
|
else:
|
|
yy += 2000
|
|
tzoffset = None
|
|
tz = tz.upper()
|
|
if tz in _timezones:
|
|
tzoffset = _timezones[tz]
|
|
else:
|
|
try:
|
|
tzoffset = int(tz)
|
|
except ValueError:
|
|
pass
|
|
if tzoffset==0 and tz.startswith('-'):
|
|
tzoffset = None
|
|
# 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 POSIX timestamp."""
|
|
if data[9] is None:
|
|
# No zone info, so localtime is better assumption than GMT
|
|
return time.mktime(data[:8] + (-1,))
|
|
else:
|
|
# Delay the import, since mktime_tz is rarely used
|
|
import calendar
|
|
|
|
t = calendar.timegm(data)
|
|
return t - data[9]
|
|
|
|
|
|
def quote(str):
|
|
"""Prepare string to be used in a quoted string.
|
|
|
|
Turns backslash and double quote characters into quoted pairs. These
|
|
are the only characters that need to be quoted inside a quoted string.
|
|
Does not add the surrounding double quotes.
|
|
"""
|
|
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 email.utils.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):
|
|
"""Skip white space and extract comments."""
|
|
wslist = []
|
|
while self.pos < len(self.field):
|
|
if self.field[self.pos] in self.LWS + '\n\r':
|
|
if self.field[self.pos] not in '\n\r':
|
|
wslist.append(self.field[self.pos])
|
|
self.pos += 1
|
|
elif self.field[self.pos] == '(':
|
|
self.commentlist.append(self.getcomment())
|
|
else:
|
|
break
|
|
return EMPTYSTRING.join(wslist)
|
|
|
|
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):
|
|
preserve_ws = True
|
|
if self.field[self.pos] == '.':
|
|
if aslist and not aslist[-1].strip():
|
|
aslist.pop()
|
|
aslist.append('.')
|
|
self.pos += 1
|
|
preserve_ws = False
|
|
elif self.field[self.pos] == '"':
|
|
aslist.append('"%s"' % quote(self.getquote()))
|
|
elif self.field[self.pos] in self.atomends:
|
|
if aslist and not aslist[-1].strip():
|
|
aslist.pop()
|
|
break
|
|
else:
|
|
aslist.append(self.getatom())
|
|
ws = self.gotonext()
|
|
if preserve_ws and ws:
|
|
aslist.append(ws)
|
|
|
|
if self.pos >= len(self.field) or self.field[self.pos] != '@':
|
|
return EMPTYSTRING.join(aslist)
|
|
|
|
aslist.append('@')
|
|
self.pos += 1
|
|
self.gotonext()
|
|
domain = self.getdomain()
|
|
if not domain:
|
|
# Invalid domain, return an empty address instead of returning a
|
|
# local part to denote failed parsing.
|
|
return EMPTYSTRING
|
|
return EMPTYSTRING.join(aslist) + domain
|
|
|
|
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] == '@':
|
|
# bpo-34155: Don't parse domains with two `@` like
|
|
# `a@malicious.org@important.com`.
|
|
return EMPTYSTRING
|
|
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]
|