77 lines
2.8 KiB
Python
77 lines
2.8 KiB
Python
# Copyright (C) 2001-2004 Python Software Foundation
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# Author: Barry Warsaw, Thomas Wouters, Anthony Baxter
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# Contact: email-sig@python.org
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"""A parser of RFC 2822 and MIME email messages."""
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import re
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from cStringIO import StringIO
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from email.FeedParser import FeedParser
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from email.Message import Message
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NLCRE = re.compile('\r\n|\r|\n')
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class Parser:
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def __init__(self, _class=Message, strict=False):
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"""Parser of RFC 2822 and MIME email messages.
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Creates an in-memory object tree representing the email message, which
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can then be manipulated and turned over to a Generator to return the
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textual representation of the message.
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The string must be formatted as a block of RFC 2822 headers and header
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continuation lines, optionally preceeded by a `Unix-from' header. The
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header block is terminated either by the end of the string or by a
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blank line.
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_class is the class to instantiate for new message objects when they
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must be created. This class must have a constructor that can take
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zero arguments. Default is Message.Message.
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Optional strict tells the parser to be strictly RFC compliant or to be
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more forgiving in parsing of ill-formatted MIME documents. When
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non-strict mode is used, the parser will try to make up for missing or
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erroneous boundaries and other peculiarities seen in the wild.
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Default is non-strict parsing.
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"""
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self._class = _class
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def parse(self, fp, headersonly=False):
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"""Create a message structure from the data in a file.
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Reads all the data from the file and returns the root of the message
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structure. Optional headersonly is a flag specifying whether to stop
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parsing after reading the headers or not. The default is False,
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meaning it parses the entire contents of the file.
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"""
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feedparser = FeedParser(self._class)
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if headersonly:
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feedparser._set_headersonly()
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while True:
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data = fp.read(8192)
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if not data:
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break
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feedparser.feed(data)
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return feedparser.close()
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def parsestr(self, text, headersonly=False):
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"""Create a message structure from a string.
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Returns the root of the message structure. Optional headersonly is a
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flag specifying whether to stop parsing after reading the headers or
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not. The default is False, meaning it parses the entire contents of
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the file.
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"""
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return self.parse(StringIO(text), headersonly=headersonly)
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class HeaderParser(Parser):
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def parse(self, fp, headersonly=True):
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return Parser.parse(self, fp, True)
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def parsestr(self, text, headersonly=True):
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return Parser.parsestr(self, text, True)
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