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File Content: `parser.py`

# 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', 'BytesParser', 'BytesHeaderParser',
           'FeedParser', 'BytesFeedParser']

from io import StringIO, TextIOWrapper

from email.feedparser import FeedParser, BytesFeedParser
from email._policybase import compat32


class Parser:
    def __init__(self, _class=None, *, policy=compat32):
        """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.

        The policy keyword specifies a policy object that controls a number of
        aspects of the parser's operation.  The default policy maintains
        backward compatibility.

        """
        self._class = _class
        self.policy = policy

    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, policy=self.policy)
        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)


class BytesParser:

    def __init__(self, *args, **kw):
        """Parser of binary 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 input 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 input 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.
        """
        self.parser = Parser(*args, **kw)

    def parse(self, fp, headersonly=False):
        """Create a message structure from the data in a binary 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.
        """
        fp = TextIOWrapper(fp, encoding='ascii', errors='surrogateescape')
        try:
            return self.parser.parse(fp, headersonly)
        finally:
            fp.detach()


    def parsebytes(self, text, headersonly=False):
        """Create a message structure from a byte 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.
        """
        text = text.decode('ASCII', errors='surrogateescape')
        return self.parser.parsestr(text, headersonly)


class BytesHeaderParser(BytesParser):
    def parse(self, fp, headersonly=True):
        return BytesParser.parse(self, fp, headersonly=True)

    def parsebytes(self, text, headersonly=True):
        return BytesParser.parsebytes(self, text, headersonly=True)

Name	Size	Permission
__pycache__	---	0755
mime	---	0755
__init__.py	1764 bytes	0644
_encoded_words.py	8541 bytes	0644
_header_value_parser.py	107314 bytes	0644
_parseaddr.py	17821 bytes	0644
_policybase.py	15073 bytes	0644
architecture.rst	9561 bytes	0644
base64mime.py	3551 bytes	0644
charset.py	17118 bytes	0644
contentmanager.py	10588 bytes	0644
encoders.py	1778 bytes	0644
errors.py	3735 bytes	0644
feedparser.py	22802 bytes	0644
generator.py	20194 bytes	0644
header.py	24092 bytes	0644
headerregistry.py	20819 bytes	0644
iterators.py	2129 bytes	0644
message.py	48029 bytes	0644
parser.py	5038 bytes	0644
policy.py	10519 bytes	0644
quoprimime.py	9864 bytes	0644
utils.py	13443 bytes	0644

File Content: parser.py

File Content: `parser.py`