mirror of https://github.com/python/cpython
96 lines
3.4 KiB
Python
96 lines
3.4 KiB
Python
|
# 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)
|