96 lines
3.4 KiB
Python
96 lines
3.4 KiB
Python
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# Copyright (C) 2001-2007 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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__all__ = ['Parser', 'HeaderParser']
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import warnings
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from io import StringIO
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from email.feedparser import FeedParser
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from email.message import Message
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class Parser:
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def __init__(self, *args, **kws):
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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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"""
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if len(args) >= 1:
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if '_class' in kws:
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raise TypeError("Multiple values for keyword arg '_class'")
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kws['_class'] = args[0]
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if len(args) == 2:
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if 'strict' in kws:
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raise TypeError("Multiple values for keyword arg 'strict'")
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kws['strict'] = args[1]
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if len(args) > 2:
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raise TypeError('Too many arguments')
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if '_class' in kws:
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self._class = kws['_class']
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del kws['_class']
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else:
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self._class = Message
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if 'strict' in kws:
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warnings.warn("'strict' argument is deprecated (and ignored)",
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DeprecationWarning, 2)
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del kws['strict']
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if kws:
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raise TypeError('Unexpected keyword arguments')
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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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# XXX When Guido fixes TextIOWrapper.read() to act just like
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# .readlines(), this...
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feedparser.feed(str(data))
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# ...gets reverted back to
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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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