# Copyright (C) 2001-2006 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 warningsfrom cStringIO import StringIO from email.feedparser import FeedParserfrom 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            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)