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# 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 warnings from cStringIO 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 preceded 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)