Sync'ing with standalone email package 2.0.1. This adds support for

non-us-ascii character sets in headers and bodies.  Some API changes
(with DeprecationWarnings for the old APIs).  Better RFC-compliant
implementations of base64 and quoted-printable.

Updated test cases.  Documentation updates to follow (after I finish
writing them ;).

16 files changed, 1438 insertions, 96 deletions

diff --git a/Lib/email/Charset.py b/Lib/email/Charset.py
new file mode 100644
index 0000000..4874597
--- /dev/null
+++ b/Lib/email/Charset.py
@@ -0,0 +1,327 @@
+# Copyright (C) 2001,2002 Python Software Foundation
+# Author: che@debian.org (Ben Gertzfield)
+
+from types import UnicodeType
+from email.Encoders import encode_7or8bit
+import email.base64MIME
+import email.quopriMIME
+
+
+
+# Flags for types of header encodings
+QP     = 1  # Quoted-Printable
+BASE64 = 2  # Base64
+
+# In "=?charset?q?hello_world?=", the =?, ?q?, and ?= add up to 7
+MISC_LEN = 7 
+
+DEFAULT_CHARSET = 'us-ascii'
+
+
+
+# Defaults
+CHARSETS = {
+    # input        header enc  body enc output conv
+    'iso-8859-1':  (QP,        QP,      None), 
+    'iso-8859-2':  (QP,        QP,      None),
+    'us-ascii':    (None,      None,    None),
+    'big5':        (BASE64,    BASE64,  None),
+    'gb2312':      (BASE64,    BASE64,  None), 
+    'euc-jp':      (BASE64,    None,    'iso-2022-jp'),
+    'shift_jis':   (BASE64,    None,    'iso-2022-jp'),
+    'iso-2022-jp': (BASE64,    None,    None),
+    'koi8-r':      (BASE64,    BASE64,  None),
+    'utf-8':       (BASE64,    BASE64,  'utf-8'),
+    }
+
+# Aliases for other commonly-used names for character sets.  Map
+# them to the real ones used in email.
+ALIASES = {
+    'latin_1': 'iso-8859-1',
+    'latin-1': 'iso-8859-1',
+    'ascii':   'us-ascii',
+    }
+
+# Map charsets to their Unicode codec strings.  Note that the Japanese
+# examples included below do not (yet) come with Python!  They are available
+# from http://pseudo.grad.sccs.chukyo-u.ac.jp/~kajiyama/python/
+
+# The Chinese and Korean codecs are available from SourceForge:
+#
+#     http://sourceforge.net/projects/python-codecs/
+#
+# although you'll need to check them out of cvs since they haven't been file
+# released yet.  You might also try to use
+#
+#     http://www.freshports.org/port-description.php3?port=6702
+#
+# if you can get logged in.  AFAICT, both the Chinese and Korean codecs are
+# fairly experimental at this point.
+CODEC_MAP = {
+    'euc-jp':      'japanese.euc-jp',
+    'iso-2022-jp': 'japanese.iso-2022-jp',
+    'shift_jis':   'japanese.shift_jis',
+    'gb2132':      'eucgb2312_cn',
+    'big5':        'big5_tw',
+    'utf-8':       'utf-8',
+    # Hack: We don't want *any* conversion for stuff marked us-ascii, as all
+    # sorts of garbage might be sent to us in the guise of 7-bit us-ascii.
+    # Let that stuff pass through without conversion to/from Unicode.
+    'us-ascii':    None,
+    }
+
+
+
+# Convenience functions for extending the above mappings
+def add_charset(charset, header_enc=None, body_enc=None, output_charset=None):
+    """Add charset properties to the global map.
+
+    charset is the input character set, and must be the canonical name of a
+    character set.
+
+    Optional header_enc and body_enc is either Charset.QP for
+    quoted-printable, Charset.BASE64 for base64 encoding, or None for no
+    encoding.  It describes how message headers and message bodies in the
+    input charset are to be encoded.  Default is no encoding.
+
+    Optional output_charset is the character set that the output should be
+    in.  Conversions will proceed from input charset, to Unicode, to the
+    output charset when the method Charset.convert() is called.  The default
+    is to output in the same character set as the input.
+
+    Both input_charset and output_charset must have Unicode codec entries in
+    the module's charset-to-codec mapping; use add_codec(charset, codecname)
+    to add codecs the module does not know about.  See the codec module's
+    documentation for more information.
+    """
+    CHARSETS[charset] = (header_enc, body_enc, output_charset)
+
+
+def add_alias(alias, canonical):
+    """Add a character set alias.
+
+    alias is the alias name, e.g. latin-1
+    canonical is the character set's canonical name, e.g. iso-8859-1
+    """
+    ALIASES[alias] = canonical
+
+
+def add_codec(charset, codecname):
+    """Add a codec that map characters in the given charset to/from Unicode.
+
+    charset is the canonical name of a character set.  codecname is the name
+    of a Python codec, as appropriate for the second argument to the unicode()
+    built-in, or to the .encode() method of a Unicode string.
+    """
+    CODEC_MAP[charset] = codecname
+
+
+
+class Charset:
+    """Map character sets to their email properties.
+
+    This class provides information about the requirements imposed on email
+    for a specific character set.  It also provides convenience routines for
+    converting between character sets, given the availability of the
+    applicable codecs.  Given an character set, it will do its best to provide
+    information on how to use that character set in an email.
+    
+    Certain character sets must be encoded with quoted-printable or base64
+    when used in email headers or bodies.  Certain character sets must be
+    converted outright, and are not allowed in email.  Instances of this
+    module expose the following information about a character set:
+
+    input_charset: The initial character set specified.  Common aliases
+                   are converted to their `official' email names (e.g. latin_1
+                   is converted to iso-8859-1).  Defaults to 7-bit us-ascii.
+
+    header_encoding: If the character set must be encoded before it can be
+                     used in an email header, this attribute will be set to
+                     Charset.QP (for quoted-printable) or Charset.BASE64 (for
+                     base64 encoding).  Otherwise, it will be None.
+
+    body_encoding: Same as header_encoding, but describes the encoding for the
+                   mail message's body, which indeed may be different than the
+                   header encoding.
+
+    output_charset: Some character sets must be converted before the can be
+                    used in email headers or bodies.  If the input_charset is
+                    one of them, this attribute will contain the name of the
+                    charset output will be converted to.  Otherwise, it will
+                    be None.
+
+    input_codec: The name of the Python codec used to convert the
+                 input_charset to Unicode.  If no conversion codec is
+                 necessary, this attribute will be None.
+
+    output_codec: The name of the Python codec used to convert Unicode
+                  to the output_charset.  If no conversion codec is necessary,
+                  this attribute will have the same value as the input_codec.
+    """
+    def __init__(self, input_charset=DEFAULT_CHARSET):
+        # Set the input charset after filtering through the aliases
+        self.input_charset = ALIASES.get(input_charset, input_charset)
+        # We can try to guess which encoding and conversion to use by the
+        # charset_map dictionary.  Try that first, but let the user override
+        # it.
+        henc, benc, conv = CHARSETS.get(self.input_charset,
+                                        (BASE64, BASE64, None))
+        # Set the attributes, allowing the arguments to override the default.
+        self.header_encoding = henc
+        self.body_encoding = benc
+        self.output_charset = ALIASES.get(conv, conv)
+        # Now set the codecs.  If one isn't defined for input_charset,
+        # guess and try a Unicode codec with the same name as input_codec.
+        self.input_codec = CODEC_MAP.get(self.input_charset,
+                                         self.input_charset)
+        self.output_codec = CODEC_MAP.get(self.output_charset,
+                                            self.input_codec)
+
+    def __str__(self):
+        return self.input_charset.lower()
+
+    def __eq__(self, other):
+        return str(self) == str(other).lower()
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def get_body_encoding(self):
+        """Return the content-transfer-encoding used for body encoding.
+
+        This is either the string `quoted-printable' or `base64' depending on
+        the encoding used, or it is a function in which case you should call
+        the function with a single argument, the Message object being
+        encoded.  The function should then set the Content-Transfer-Encoding:
+        header itself to whatever is appropriate.
+
+        Returns "quoted-printable" if self.body_encoding is QP.
+        Returns "base64" if self.body_encoding is BASE64.
+        Returns "7bit" otherwise.
+        """
+        if self.body_encoding == QP:
+            return 'quoted-printable'
+        elif self.body_encoding == BASE64:
+            return 'base64'
+        else:
+            return encode_7or8bit
+
+    def convert(self, s):
+        """Convert a string from the input_codec to the output_codec."""
+        if self.input_codec <> self.output_codec:
+            return unicode(s, self.input_codec).encode(self.output_codec)
+        else:
+            return s
+
+    def to_splittable(self, s):
+        """Convert a possibly multibyte string to a safely splittable format.
+
+        Uses the input_codec to try and convert the string to Unicode, so it
+        can be safely split on character boundaries (even for double-byte
+        characters).
+
+        Returns the string untouched if we don't know how to convert it to
+        Unicode with the input_charset.
+
+        Characters that could not be converted to Unicode will be replaced
+        with the Unicode replacement character U+FFFD.
+        """
+        if isinstance(s, UnicodeType) or self.input_codec is None:
+            return s
+        try:
+            return unicode(s, self.input_codec, 'replace')
+        except LookupError:
+            # Input codec not installed on system, so return the original
+            # string unchanged.
+            return s
+
+    def from_splittable(self, ustr, to_output=1):
+        """Convert a splittable string back into an encoded string.
+
+        Uses the proper codec to try and convert the string from
+        Unicode back into an encoded format.  Return the string as-is
+        if it is not Unicode, or if it could not be encoded from
+        Unicode.
+
+        Characters that could not be converted from Unicode will be replaced
+        with an appropriate character (usually '?').
+
+        If to_output is true, uses output_codec to convert to an encoded
+        format.  If to_output is false, uses input_codec.  to_output defaults
+        to 1.
+        """
+        if to_output:
+            codec = self.output_codec
+        else:
+            codec = self.input_codec
+        if not isinstance(ustr, UnicodeType) or codec is None:
+            return ustr
+        try:
+            return ustr.encode(codec, 'replace')
+        except LookupError:
+            # Output codec not installed
+            return ustr
+
+    def get_output_charset(self):
+        """Return the output character set.
+
+        This is self.output_charset if that is set, otherwise it is
+        self.input_charset.
+        """
+        return self.output_charset or self.input_charset
+
+    def encoded_header_len(self, s):
+        """Return the length of the encoded header string."""
+        cset = self.get_output_charset()
+        # The len(s) of a 7bit encoding is len(s)
+        if self.header_encoding is BASE64:
+            return email.base64MIME.base64_len(s) + len(cset) + MISC_LEN
+        elif self.header_encoding is QP:
+            return email.quopriMIME.header_quopri_len(s) + len(cset) + MISC_LEN
+        else:
+            return len(s)
+
+    def header_encode(self, s, convert=0):
+        """Header-encode a string, optionally converting it to output_charset.
+
+        If convert is true, the string will be converted from the input
+        charset to the output charset automatically.  This is not useful for
+        multibyte character sets, which have line length issues (multibyte
+        characters must be split on a character, not a byte boundary); use the
+        high-level Header class to deal with these issues.  convert defaults
+        to 0.
+
+        The type of encoding (base64 or quoted-printable) will be based on
+        self.header_encoding.
+        """
+        cset = self.get_output_charset()
+        if convert:
+            s = self.convert(s)
+        # 7bit/8bit encodings return the string unchanged (modulo conversions)
+        if self.header_encoding is BASE64:
+            return email.base64MIME.header_encode(s, cset)
+        elif self.header_encoding is QP:
+            return email.quopriMIME.header_encode(s, cset)
+        else:
+            return s
+
+    def body_encode(self, s, convert=1):
+        """Body-encode a string and convert it to output_charset.
+
+        If convert is true (the default), the string will be converted from
+        the input charset to output charset automatically.  Unlike
+        header_encode(), there are no issues with byte boundaries and
+        multibyte charsets in email bodies, so this is usually pretty safe.
+
+        The type of encoding (base64 or quoted-printable) will be based on
+        self.body_encoding.
+        """
+        if convert:
+            s = self.convert(s)
+        # 7bit/8bit encodings return the string unchanged (module conversions)
+        if self.body_encoding is BASE64:
+            return email.base64MIME.body_encode(s)
+        elif self.header_encoding is QP:
+            return email.quopriMIME.body_encode(s)
+        else:
+            return s
diff --git a/Lib/email/Encoders.py b/Lib/email/Encoders.py
index d9cd42d..f09affa 100644
--- a/Lib/email/Encoders.py
+++ b/Lib/email/Encoders.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2001 Python Software Foundation
+# Copyright (C) 2001,2002 Python Software Foundation
 # Author: barry@zope.com (Barry Warsaw)
 
 """Module containing encoding functions for Image.Image and Text.Text.
@@ -11,7 +11,9 @@ from quopri import encodestring as _encodestring
 
 # Helpers
 def _qencode(s):
-    return _encodestring(s, quotetabs=1)
+    enc = _encodestring(s, quotetabs=1)
+    # Must encode spaces, which quopri.encodestring() doesn't do
+    return enc.replace(' ', '=20')
 
 
 def _bencode(s):
@@ -54,6 +56,10 @@ def encode_quopri(msg):
 def encode_7or8bit(msg):
     """Set the Content-Transfer-Encoding: header to 7bit or 8bit."""
     orig = msg.get_payload()
+    if orig is None:
+        # There's no payload.  For backwards compatibility we use 7bit
+        msg['Content-Transfer-Encoding'] = '7bit'
+        return
     # We play a trick to make this go fast.  If encoding to ASCII succeeds, we
     # know the data must be 7bit, otherwise treat it as 8bit.
     try:
diff --git a/Lib/email/Errors.py b/Lib/email/Errors.py
index 71d7663..e3a3666 100644
--- a/Lib/email/Errors.py
+++ b/Lib/email/Errors.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2001 Python Software Foundation
+# Copyright (C) 2001,2002 Python Software Foundation
 # Author: barry@zope.com (Barry Warsaw)
 
 """email package exception classes.
diff --git a/Lib/email/Generator.py b/Lib/email/Generator.py
index 981e0ff..dbbcabc 100644
--- a/Lib/email/Generator.py
+++ b/Lib/email/Generator.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2001 Python Software Foundation
+# Copyright (C) 2001,2002 Python Software Foundation
 # Author: barry@zope.com (Barry Warsaw)
 
 """Classes to generate plain text from a message object tree.
@@ -166,30 +166,33 @@ class Generator:
             return text
         rtn = []
         for line in text.split('\n'):
+            splitline = []
             # Short lines can remain unchanged
             if len(line.replace('\t', SPACE8)) <= maxheaderlen:
-                rtn.append(line)
-                SEMINLTAB.join(rtn)
+                splitline.append(line)
+                rtn.append(SEMINLTAB.join(splitline))
             else:
-                oldlen = len(text)
+                oldlen = len(line)
                 # Try to break the line on semicolons, but if that doesn't
                 # work, try to split on folding whitespace.
-                while len(text) > maxheaderlen:
-                    i = text.rfind(';', 0, maxheaderlen)
+                while len(line) > maxheaderlen:
+                    i = line.rfind(';', 0, maxheaderlen)
                     if i < 0:
                         break
-                    rtn.append(text[:i])
-                    text = text[i+1:].lstrip()
-                if len(text) <> oldlen:
+                    splitline.append(line[:i])
+                    line = line[i+1:].lstrip()
+                if len(line) <> oldlen:
                     # Splitting on semis worked
-                    rtn.append(text)
-                    return SEMINLTAB.join(rtn)
+                    splitline.append(line)
+                    rtn.append(SEMINLTAB.join(splitline))
+                    continue
                 # Splitting on semis didn't help, so try to split on
                 # whitespace.
-                parts = re.split(r'(\s+)', text)
+                parts = re.split(r'(\s+)', line)
                 # Watch out though for "Header: longnonsplittableline"
                 if parts[0].endswith(':') and len(parts) == 3:
-                    return text
+                    rtn.append(line)
+                    continue
                 first = parts.pop(0)
                 sublines = [first]
                 acc = len(first)
@@ -203,13 +206,14 @@ class Generator:
                     else:
                         # Split it here, but don't forget to ignore the
                         # next whitespace-only part
-                        rtn.append(EMPTYSTRING.join(sublines))
+                        splitline.append(EMPTYSTRING.join(sublines))
                         del parts[0]
                         first = parts.pop(0)
                         sublines = [first]
                         acc = len(first)
-                rtn.append(EMPTYSTRING.join(sublines))
-                return NLTAB.join(rtn)
+                splitline.append(EMPTYSTRING.join(sublines))
+                rtn.append(NLTAB.join(splitline))
+        return NL.join(rtn)
 
     #
     # Handlers for writing types and subtypes
@@ -219,6 +223,9 @@ class Generator:
         payload = msg.get_payload()
         if payload is None:
             return
+        cset = msg.get_charset()
+        if cset is not None:
+            payload = cset.body_encode(payload)
         if not isinstance(payload, StringType):
             raise TypeError, 'string payload expected: %s' % type(payload)
         if self._mangle_from_:
@@ -233,7 +240,18 @@ class Generator:
         # together, and then make sure that the boundary we've chosen isn't
         # present in the payload.
         msgtexts = []
-        for part in msg.get_payload():
+        subparts = msg.get_payload()
+        if subparts is None:
+            # Nothing has every been attached
+            boundary = msg.get_boundary(failobj=_make_boundary())
+            print >> self._fp, '--' + boundary
+            print >> self._fp, '\n'
+            print >> self._fp, '--' + boundary + '--'
+            return
+        elif not isinstance(subparts, ListType):
+            # Scalar payload
+            subparts = [subparts]
+        for part in subparts:
             s = StringIO()
             g = self.__class__(s, self._mangle_from_, self.__maxheaderlen)
             g(part, unixfrom=0)
@@ -365,7 +383,7 @@ class DecodedGenerator(Generator):
 
 
 # Helper
-def _make_boundary(self, text=None):
+def _make_boundary(text=None):
     # Craft a random boundary.  If text is given, ensure that the chosen
     # boundary doesn't appear in the text.
     boundary = ('=' * 15) + repr(random.random()).split('.')[1] + '=='
diff --git a/Lib/email/Header.py b/Lib/email/Header.py
new file mode 100644
index 0000000..097b978
--- /dev/null
+++ b/Lib/email/Header.py
@@ -0,0 +1,210 @@
+# Copyright (C) 2002 Python Software Foundation
+# Author: che@debian.org (Ben Gertzfield)
+
+"""Header encoding and decoding functionality."""
+
+import re
+import email.quopriMIME
+import email.base64MIME
+from email.Charset import Charset
+
+CRLFSPACE = '\r\n '
+CRLF = '\r\n'
+NLSPACE = '\n '
+
+MAXLINELEN = 76
+
+ENCODE = 1
+DECODE = 2
+
+# Match encoded-word strings in the form =?charset?q?Hello_World?=
+ecre = re.compile(r'''
+  =\?                   # literal =?
+  (?P<charset>[^?]*?)   # non-greedy up to the next ? is the charset
+  \?                    # literal ?
+  (?P<encoding>[qb])    # either a "q" or a "b", case insensitive
+  \?                    # literal ?
+  (?P<encoded>.*?)      # non-greedy up to the next ?= is the encoded string
+  \?=                   # literal ?=
+  ''', re.VERBOSE | re.IGNORECASE)
+
+
+
+# Helpers
+_max_append = email.quopriMIME._max_append
+
+
+
+def decode_header(header):
+    """Decode a message header value without converting charset.
+
+    Returns a list of (decoded_string, charset) pairs containing each of the
+    decoded parts of the header.  Charset is None for non-encoded parts of the
+    header, otherwise a lower-case string containing the name of the character
+    set specified in the encoded string.
+    """
+    # If no encoding, just return the header
+    header = str(header)
+    if not ecre.search(header):
+        return [(header, None)]
+
+    decoded = []
+    dec = ''
+    for line in header.splitlines():
+        # This line might not have an encoding in it
+        if not ecre.search(line):
+            decoded.append((line, None))
+            continue
+        
+        parts = ecre.split(line)
+        while parts:
+            unenc = parts.pop(0).strip()
+            if unenc:
+                # Should we continue a long line?
+                if decoded and decoded[-1][1] is None:
+                    decoded[-1] = (decoded[-1][0] + dec, None)
+                else:
+                    decoded.append((unenc, None))
+            if parts:
+                charset, encoding = [s.lower() for s in parts[0:2]]
+                encoded = parts[2]
+                dec = ''
+                if encoding == 'q':
+                    dec = email.quopriMIME.header_decode(encoded)
+                elif encoding == 'b':
+                    dec = email.base64MIME.decode(encoded)
+                else:
+                    dec = encoded
+
+                if decoded and decoded[-1][1] == charset:
+                    decoded[-1] = (decoded[-1][0] + dec, decoded[-1][1])
+                else:
+                    decoded.append((dec, charset))
+            del parts[0:3]
+    return decoded
+
+
+
+class Header:
+    def __init__(self, s, charset=None, maxlinelen=MAXLINELEN,
+                 header_name=None):
+        """Create a MIME-compliant header that can contain many languages.
+
+        Specify the initial header value in s.  Specify its character set as a
+        Charset object in the charset argument.  If none, a default Charset
+        instance will be used.
+
+        You can later append to the header with append(s, charset) below;
+        charset does not have to be the same as the one initially specified
+        here.  In fact, it's optional, and if not given, defaults to the
+        charset specified in the constructor.
+
+        The maximum line length can either be specified by maxlinelen, or you
+        can pass in the name of the header field (e.g. "Subject") to let this
+        class guess the best line length to use to prevent wrapping.  The
+        default maxlinelen is 76.
+        """
+        if charset is None:
+            charset = Charset()
+        self._charset = charset
+        # BAW: I believe `chunks' and `maxlinelen' should be non-public.
+        self._chunks = []
+        self.append(s, charset)
+        self._maxlinelen = maxlinelen
+        if header_name is not None:
+            self.guess_maxlinelen(header_name)
+
+    def __str__(self):
+        """A synonym for self.encode()."""
+        return self.encode()
+
+    def guess_maxlinelen(self, s=None):
+        """Guess the maximum length to make each header line.
+
+        Given a header name (e.g. "Subject"), set this header's maximum line
+        length to an appropriate length to avoid line wrapping.  If s is not
+        given, return the previous maximum line length and don't set it.
+
+        Returns the new maximum line length.
+        """
+        # BAW: is this semantic necessary?
+        if s is not None:
+            self._maxlinelen = MAXLINELEN - len(s) - 2
+        return self._maxlinelen
+
+    def append(self, s, charset=None):
+        """Append string s with Charset charset to the MIME header.
+
+        charset defaults to the one given in the class constructor.
+        """
+        if charset is None:
+            charset = self._charset
+        self._chunks.append((s, charset))
+        
+    def _split(self, s, charset):
+        # Split up a header safely for use with encode_chunks.  BAW: this
+        # appears to be a private convenience method.
+        splittable = charset.to_splittable(s)
+        encoded = charset.from_splittable(splittable)
+        
+        if charset.encoded_header_len(encoded) < self._maxlinelen:
+            return [(encoded, charset)]
+        else:
+            # Divide and conquer.  BAW: halfway depends on integer division.
+            # When porting to Python 2.2, use the // operator.
+            halfway = len(splittable) // 2
+            first = charset.from_splittable(splittable[:halfway], 0)
+            last = charset.from_splittable(splittable[halfway:], 0)
+            return self._split(first, charset) + self._split(last, charset)
+
+    def encode(self):
+        """Encode a message header, possibly converting charset and encoding.
+
+        There are many issues involved in converting a given string for use in
+        an email header.  Only certain character sets are readable in most
+        email clients, and as header strings can only contain a subset of
+        7-bit ASCII, care must be taken to properly convert and encode (with
+        Base64 or quoted-printable) header strings.  In addition, there is a
+        75-character length limit on any given encoded header field, so
+        line-wrapping must be performed, even with double-byte character sets.
+        
+        This method will do its best to convert the string to the correct
+        character set used in email, and encode and line wrap it safely with
+        the appropriate scheme for that character set.
+
+        If the given charset is not known or an error occurs during
+        conversion, this function will return the header untouched.
+        """
+        newchunks = []
+        for s, charset in self._chunks:
+            newchunks += self._split(s, charset)
+        self._chunks = newchunks
+        return self.encode_chunks()
+
+    def encode_chunks(self):
+        """MIME-encode a header with many different charsets and/or encodings.
+
+        Given a list of pairs (string, charset), return a MIME-encoded string
+        suitable for use in a header field.  Each pair may have different
+        charsets and/or encodings, and the resulting header will accurately
+        reflect each setting.
+
+        Each encoding can be email.Utils.QP (quoted-printable, for ASCII-like
+        character sets like iso-8859-1), email.Utils.BASE64 (Base64, for
+        non-ASCII like character sets like KOI8-R and iso-2022-jp), or None
+        (no encoding).
+
+        Each pair will be represented on a separate line; the resulting string
+        will be in the format:
+
+        "=?charset1?q?Mar=EDa_Gonz=E1lez_Alonso?=\n
+          =?charset2?b?SvxyZ2VuIEL2aW5n?="
+        """
+        chunks = []
+        for header, charset in self._chunks:
+            if charset is None:
+                _max_append(chunks, header, self._maxlinelen, ' ')
+            else:
+                _max_append(chunks, charset.header_encode(header, 0),
+                            self._maxlinelen, ' ')
+        return NLSPACE.join(chunks)
diff --git a/Lib/email/Iterators.py b/Lib/email/Iterators.py
index a64495d..515bac9 100644
--- a/Lib/email/Iterators.py
+++ b/Lib/email/Iterators.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2001 Python Software Foundation
+# Copyright (C) 2001,2002 Python Software Foundation
 # Author: barry@zope.com (Barry Warsaw)
 
 """Various types of useful iterators and generators.
diff --git a/Lib/email/MIMEBase.py b/Lib/email/MIMEBase.py
index 33216f6..28816e8 100644
--- a/Lib/email/MIMEBase.py
+++ b/Lib/email/MIMEBase.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2001 Python Software Foundation
+# Copyright (C) 2001,2002 Python Software Foundation
 # Author: barry@zope.com (Barry Warsaw)
 
 """Base class for MIME specializations.
diff --git a/Lib/email/MIMEImage.py b/Lib/email/MIMEImage.py
index 963da23..f0e7931a 100644
--- a/Lib/email/MIMEImage.py
+++ b/Lib/email/MIMEImage.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2001 Python Software Foundation
+# Copyright (C) 2001,2002 Python Software Foundation
 # Author: barry@zope.com (Barry Warsaw)
 
 """Class representing image/* type MIME documents.
diff --git a/Lib/email/MIMEMessage.py b/Lib/email/MIMEMessage.py
index fc4b2c6..89da925 100644
--- a/Lib/email/MIMEMessage.py
+++ b/Lib/email/MIMEMessage.py
@@ -1,4 +1,4 @@
-# Copyright (C) 2001 Python Software Foundation
+# Copyright (C) 2001,2002 Python Software Foundation
 # Author: barry@zope.com (Barry Warsaw)
 
 """Class representing message/* MIME documents.
diff --git a/Lib/email/MIMEText.py b/Lib/email/MIMEText.py
index ccce9fb..8669d28 100644
--- a/Lib/email/MIMEText.py
+++ b/Lib/email/MIMEText.py
@@ -1,9 +1,10 @@
-# Copyright (C) 2001 Python Software Foundation
+# Copyright (C) 2001,2002 Python Software Foundation
 # Author: barry@zope.com (Barry Warsaw)
 
 """Class representing text/* type MIME documents.
 """
 
+import warnings
 import MIMEBase
 from Encoders import encode_7or8bit
 
@@ -13,7 +14,7 @@ class MIMEText(MIMEBase.MIMEBase):
     """Class for generating text/* type MIME documents."""
 
     def __init__(self, _text, _subtype='plain', _charset='us-ascii',
-                 _encoder=encode_7or8bit):
+                 _encoder=None):
         """Create a text/* type MIME document.
 
         _text is the string for this message object.  If the text does not end
@@ -22,20 +23,26 @@ class MIMEText(MIMEBase.MIMEBase):
         _subtype is the MIME sub content type, defaulting to "plain".
 
         _charset is the character set parameter added to the Content-Type:
-        header.  This defaults to "us-ascii".
-
-        _encoder is a function which will perform the actual encoding for
-        transport of the text data.  It takes one argument, which is this
-        Text instance.  It should use get_payload() and set_payload() to
-        change the payload to the encoded form.  It should also add any
-        Content-Transfer-Encoding: or other headers to the message as
-        necessary.  The default encoding doesn't actually modify the payload,
-        but it does set Content-Transfer-Encoding: to either `7bit' or `8bit'
-        as appropriate.
+        header.  This defaults to "us-ascii".  Note that as a side-effect, the
+        Content-Transfer-Encoding: header will also be set.
+
+        The use of the _encoder is deprecated.  The encoding of the payload,
+        and the setting of the character set parameter now happens implicitly
+        based on the _charset argument.  If _encoder is supplied, then a
+        DeprecationWarning is used, and the _encoder functionality may
+        override any header settings indicated by _charset.  This is probably
+        not what you want.
         """
         MIMEBase.MIMEBase.__init__(self, 'text', _subtype,
                                    **{'charset': _charset})
         if _text and _text[-1] <> '\n':
             _text += '\n'
-        self.set_payload(_text)
-        _encoder(self)
+        self.set_payload(_text, _charset)
+        if _encoder is not None:
+            warnings.warn('_encoder argument is obsolete.',
+                          DeprecationWarning, 2)
+            # Because set_payload() with a _charset will set its own
+            # Content-Transfer-Encoding: header, we need to delete the
+            # existing one or will end up with two of them. :(
+            del self['content-transfer-encoding']
+            _encoder(self)
diff --git a/Lib/email/Message.py b/Lib/email/Message.py
index 91931a1..71d10c4 100644
--- a/Lib/email/Message.py
+++ b/Lib/email/Message.py
@@ -1,23 +1,47 @@
-# Copyright (C) 2001 Python Software Foundation
+# Copyright (C) 2001,2002 Python Software Foundation
 # Author: barry@zope.com (Barry Warsaw)
 
 """Basic message object for the email package object model.
 """
 
-from __future__ import generators
-
 import re
-import base64
-import quopri
+import warnings
 from cStringIO import StringIO
-from types import ListType
+from types import ListType, StringType
 
 # Intrapackage imports
 import Errors
 import Utils
+import Charset
 
 SEMISPACE = '; '
+
+# Regular expression used to split header parameters.  BAW: this may be too
+# simple.  It isn't strictly RFC 2045 (section 5.1) compliant, but it catches
+# most headers found in the wild.  We may eventually need a full fledged
+# parser eventually.
 paramre = re.compile(r'\s*;\s*')
+# Regular expression that matches `special' characters in parameters, the
+# existance of which force quoting of the parameter value.
+tspecials = re.compile(r'[ \(\)<>@,;:\\"/\[\]\?=]')
+
+
+
+# Helper function
+def _formatparam(param, value=None, quote=1):
+    """Convenience function to format and return a key=value pair.
+
+    Will quote the value if needed or if quote is true.
+    """
+    if value is not None and len(value) > 0:
+        # BAW: Please check this.  I think that if quote is set it should
+        # force quoting even if not necessary.
+        if quote or tspecials.search(value):
+            return '%s="%s"' % (param, Utils.quote(value))
+        else:
+            return '%s=%s' % (param, value)
+    else:
+        return param
 
 
 
@@ -39,6 +63,7 @@ class Message:
         self._headers = []
         self._unixfrom = None
         self._payload = None
+        self._charset = None
         # Defaults for multipart messages
         self.preamble = self.epilogue = None
 
@@ -83,6 +108,8 @@ class Message:
         If the current payload is empty, then the current payload will be made
         a scalar, set to the given value.
         """
+        warnings.warn('add_payload() is deprecated, use attach() instead.',
+                      DeprecationWarning, 2)
         if self._payload is None:
             self._payload = payload
         elif type(self._payload) is ListType:
@@ -93,8 +120,18 @@ class Message:
         else:
             self._payload = [self._payload, payload]
 
-    # A useful synonym
-    attach = add_payload
+    def attach(self, payload):
+        """Add the given payload to the current payload.
+
+        The current payload will always be a list of objects after this method
+        is called.  If you want to set the payload to a scalar object
+        (e.g. because you're attaching a message/rfc822 subpart), use
+        set_payload() instead.
+        """
+        if self._payload is None:
+            self._payload = [payload]
+        else:
+            self._payload.append(payload)
 
     def get_payload(self, i=None, decode=0):
         """Return the current payload exactly as is.
@@ -128,10 +165,58 @@ class Message:
         return payload
 
 
-    def set_payload(self, payload):
-        """Set the payload to the given value."""
+    def set_payload(self, payload, charset=None):
+        """Set the payload to the given value.
+
+        Optionally set the charset, which must be a Charset instance."""
         self._payload = payload
+        if charset is not None:
+            self.set_charset(charset)
+
+    def set_charset(self, charset):
+        """Set the charset of the payload to a given character set.
+
+        charset can be a string or a Charset object.  If it is a string, it
+        will be converted to a Charset object by calling Charset's
+        constructor.  If charset is None, the charset parameter will be
+        removed from the Content-Type: field.  Anything else will generate a
+        TypeError.
+
+        The message will be assumed to be a text message encoded with
+        charset.input_charset.  It will be converted to charset.output_charset
+        and encoded properly, if needed, when generating the plain text
+        representation of the message.  MIME headers (MIME-Version,
+        Content-Type, Content-Transfer-Encoding) will be added as needed.
+        """
+        if charset is None:
+            self.del_param('charset')
+            self._charset = None
+            return
+        if isinstance(charset, StringType):
+            charset = Charset.Charset(charset)
+        if not isinstance(charset, Charset.Charset):
+            raise TypeError, charset
+        # BAW: should we accept strings that can serve as arguments to the
+        # Charset constructor?
+        self._charset = charset
+        if not self.has_key('MIME-Version'):
+            self.add_header('MIME-Version', '1.0')
+        if not self.has_key('Content-Type'):
+            self.add_header('Content-Type', 'text/plain',
+                            charset=charset.get_output_charset())
+        else:
+            self.set_param('charset', charset.get_output_charset())
+        if not self.has_key('Content-Transfer-Encoding'):
+            cte = charset.get_body_encoding()
+            if callable(cte):
+                cte(self)
+            else:
+                self.add_header('Content-Transfer-Encoding', cte)
 
+    def get_charset(self):
+        """Return the Charset object associated with the message's payload."""
+        return self._charset
+        
     #
     # MAPPING INTERFACE (partial)
     #
@@ -257,7 +342,7 @@ class Message:
             if v is None:
                 parts.append(k.replace('_', '-'))
             else:
-                parts.append('%s="%s"' % (k.replace('_', '-'), v))
+                parts.append(_formatparam(k.replace('_', '-'), v))
         if _value is not None:
             parts.insert(0, _value)
         self._headers.append((_name, SEMISPACE.join(parts)))
@@ -308,6 +393,8 @@ class Message:
         for p in paramre.split(value):
             try:
                 name, val = p.split('=', 1)
+                name = name.rstrip()
+                val = val.lstrip()
             except ValueError:
                 # Must have been a bare attribute
                 name = p
@@ -315,26 +402,29 @@ class Message:
             params.append((name, val))
         return params
 
-    def get_params(self, failobj=None, header='content-type'):
+    def get_params(self, failobj=None, header='content-type', unquote=1):
         """Return the message's Content-Type: parameters, as a list.
 
         The elements of the returned list are 2-tuples of key/value pairs, as
         split on the `=' sign.  The left hand side of the `=' is the key,
         while the right hand side is the value.  If there is no `=' sign in
         the parameter the value is the empty string.  The value is always
-        unquoted.
+        unquoted, unless unquote is set to a false value.
 
         Optional failobj is the object to return if there is no Content-Type:
         header.  Optional header is the header to search instead of
-        Content-Type:
+        Content-Type:.
         """
         missing = []
         params = self._get_params_preserve(missing, header)
         if params is missing:
             return failobj
-        return [(k, Utils.unquote(v)) for k, v in params]
+        if unquote:
+            return [(k, Utils.unquote(v)) for k, v in params]
+        else:
+            return params
 
-    def get_param(self, param, failobj=None, header='content-type'):
+    def get_param(self, param, failobj=None, header='content-type', unquote=1):
         """Return the parameter value if found in the Content-Type: header.
 
         Optional failobj is the object to return if there is no Content-Type:
@@ -342,15 +432,112 @@ class Message:
         Content-Type:
 
         Parameter keys are always compared case insensitively.  Values are
-        always unquoted.
+        always unquoted, unless unquote is set to a false value.
         """
         if not self.has_key(header):
             return failobj
         for k, v in self._get_params_preserve(failobj, header):
             if k.lower() == param.lower():
-                return Utils.unquote(v)
+                if unquote:
+                    return Utils.unquote(v)
+                else:
+                    return v
         return failobj
 
+    def set_param(self, param, value, header='Content-Type', requote=1):
+        """Set a parameter in the Content-Type: header.
+
+        If the parameter already exists in the header, its value will be
+        replaced with the new value.
+
+        If header is Content-Type: and has not yet been defined in this
+        message, it will be set to "text/plain" and the new parameter and
+        value will be appended, as per RFC 2045.
+
+        An alternate header can specified in the header argument, and
+        all parameters will be quoted as appropriate unless requote is
+        set to a false value.
+        """
+        if not self.has_key(header) and header.lower() == 'content-type':
+            ctype = 'text/plain'
+        else:
+            ctype = self.get(header)
+        if not self.get_param(param, header=header):
+            if not ctype:
+                ctype = _formatparam(param, value, requote)
+            else:
+                ctype = SEMISPACE.join(
+                    [ctype, _formatparam(param, value, requote)])
+        else:
+            ctype = ''
+            for old_param, old_value in self.get_params(header=header,
+                                                        unquote=requote):
+                append_param = ''
+                if old_param.lower() == param.lower():
+                    append_param = _formatparam(param, value, requote)
+                else:
+                    append_param = _formatparam(old_param, old_value, requote)
+                if not ctype:
+                    ctype = append_param
+                else:
+                    ctype = SEMISPACE.join([ctype, append_param])
+        if ctype <> self.get(header):
+            del self[header]
+            self[header] = ctype
+
+    def del_param(self, param, header='content-type', requote=1):
+        """Remove the given parameter completely from the Content-Type header.
+
+        The header will be re-written in place without param or its value.
+        All values will be quoted as appropriate unless requote is set to a
+        false value.
+        """
+        if not self.has_key(header):
+            return
+        new_ctype = ''
+        for p, v in self.get_params(header, unquote=requote):
+            if p.lower() <> param.lower():
+                if not new_ctype:
+                    new_ctype = _formatparam(p, v, requote)
+                else:
+                    new_ctype = SEMISPACE.join([new_ctype,
+                                                _formatparam(p, v, requote)])
+        if new_ctype <> self.get(header):
+            del self[header]
+            self[header] = new_ctype
+
+    def set_type(self, type, header='Content-Type', requote=1):
+        """Set the main type and subtype for the Content-Type: header.
+
+        type must be a string in the form "maintype/subtype", otherwise a
+        ValueError is raised.
+
+        This method replaces the Content-Type: header, keeping all the
+        parameters in place.  If requote is false, this leaves the existing
+        header's quoting as is.  Otherwise, the parameters will be quoted (the
+        default).
+
+        An alternate header can be specified in the header argument.  When the
+        Content-Type: header is set, we'll always also add a MIME-Version:
+        header.
+        """
+        # BAW: should we be strict?
+        if not type.count('/') == 1:
+            raise ValueError
+        # Set the Content-Type: you get a MIME-Version:
+        if header.lower() == 'content-type':
+            del self['mime-version']
+            self['MIME-Version'] = '1.0'
+        if not self.has_key(header):
+            self[header] = type
+            return
+        params = self.get_params(header, unquote=requote)
+        del self[header]
+        self[header] = type
+        # Skip the first param; it's the old type.
+        for p, v in params[1:]:
+            self.set_param(p, v, header, requote)
+
     def get_filename(self, failobj=None):
         """Return the filename associated with the payload if present.
 
diff --git a/Lib/email/Parser.py b/Lib/email/Parser.py
index 2f131d6..7177dfc 100644
--- a/Lib/email/Parser.py
+++ b/Lib/email/Parser.py
@@ -51,9 +51,16 @@ class Parser:
         lastvalue = []
         lineno = 0
         while 1:
-            line = fp.readline()[:-1]
-            if not line or not line.strip():
+            # Don't strip the line before we test for the end condition,
+            # because whitespace-only header lines are RFC compliant
+            # continuation lines.
+            line = fp.readline()
+            if not line:
                 break
+            line = line.splitlines()[0]
+            if not line:
+                break
+            # Ignore the trailing newline
             lineno += 1
             # Check for initial Unix From_ line
             if line.startswith('From '):
@@ -63,7 +70,6 @@ class Parser:
                 else:
                     raise Errors.HeaderParseError(
                         'Unix-from in headers after first rfc822 header')
-            #
             # Header continuation line
             if line[0] in ' \t':
                 if not lastheader:
@@ -134,11 +140,11 @@ class Parser:
                 msgobj = self.parsestr(part)
                 container.preamble = preamble
                 container.epilogue = epilogue
-                # Ensure that the container's payload is a list
-                if not isinstance(container.get_payload(), ListType):
-                    container.set_payload([msgobj])
-                else:
-                    container.add_payload(msgobj)
+                container.attach(msgobj)
+        elif container.get_main_type() == 'multipart':
+            # Very bad.  A message is a multipart with no boundary!
+            raise Errors.BoundaryError(
+                'multipart message with no defined boundary')
         elif container.get_type() == 'message/delivery-status':
             # This special kind of type contains blocks of headers separated
             # by a blank line.  We'll represent each header block as a
@@ -160,9 +166,9 @@ class Parser:
             except Errors.HeaderParseError:
                 msg = self._class()
                 self._parsebody(msg, fp)
-            container.add_payload(msg)
+            container.set_payload(msg)
         else:
-            container.add_payload(fp.read())
+            container.set_payload(fp.read())
 
 
 
diff --git a/Lib/email/Utils.py b/Lib/email/Utils.py
index 3d48287..887be55 100644
--- a/Lib/email/Utils.py
+++ b/Lib/email/Utils.py
@@ -1,16 +1,26 @@
-# Copyright (C) 2001 Python Software Foundation
+# Copyright (C) 2001,2002 Python Software Foundation
 # Author: barry@zope.com (Barry Warsaw)
 
 """Miscellaneous utilities.
 """
 
 import time
+import socket
 import re
+import random
+import os
+import warnings
+from cStringIO import StringIO
+from types import ListType
 
-from rfc822 import unquote, quote, parseaddr
-from rfc822 import dump_address_pair
+from rfc822 import unquote, quote
 from rfc822 import AddrlistClass as _AddrlistClass
-from rfc822 import parsedate_tz, parsedate, mktime_tz
+from rfc822 import mktime_tz
+
+# We need wormarounds for bugs in these methods in older Pythons (see below)
+from rfc822 import parsedate as _parsedate
+from rfc822 import parsedate_tz as _parsedate_tz
+from rfc822 import parseaddr as _parseaddr
 
 from quopri import decodestring as _qdecode
 import base64
@@ -20,6 +30,10 @@ from Encoders import _bencode, _qencode
 
 COMMASPACE = ', '
 UEMPTYSTRING = u''
+CRLF = '\r\n'
+
+specialsre = re.compile(r'[][\()<>@,:;".]')
+escapesre = re.compile(r'[][\()"]')
 
 
 
@@ -44,6 +58,41 @@ def _bdecode(s):
 
 
 
+def fix_eols(s):
+    """Replace all line-ending characters with \r\n."""
+    # Fix newlines with no preceding carriage return
+    s = re.sub(r'(?<!\r)\n', CRLF, s)
+    # Fix carriage returns with no following newline
+    s = re.sub(r'\r(?!\n)', CRLF, s)
+    return s
+
+
+
+def formataddr(pair):
+    """The inverse of parseaddr(), this takes a 2-tuple of the form
+    (realname, email_address) and returns the string value suitable
+    for an RFC 2822 From:, To: or Cc:.
+    
+    If the first element of pair is false, then the second element is
+    returned unmodified.
+    """
+    name, address = pair
+    if name:
+        quotes = ''
+        if specialsre.search(name):
+            quotes = '"'
+        name = escapesre.sub(r'\\\g<0>', name)
+        return '%s%s%s <%s>' % (quotes, name, quotes, address)
+    return address
+
+# For backwards compatibility
+def dump_address_pair(pair):
+    warnings.warn('Use email.Utils.formataddr() instead',
+                  DeprecationWarning, 2)
+    return formataddr(pair)
+
+
+
 def getaddresses(fieldvalues):
     """Return a list of (REALNAME, EMAIL) for each fieldvalue."""
     all = COMMASPACE.join(fieldvalues)
@@ -64,30 +113,26 @@ ecre = re.compile(r'''
 
 
 def decode(s):
-    """Return a decoded string according to RFC 2047, as a unicode string."""
+    """Return a decoded string according to RFC 2047, as a unicode string.
+
+    NOTE: This function is deprecated.  Use Header.decode_header() instead.
+    """
+    warnings.warn('Use Header.decode_header() instead.', DeprecationWarning, 2)
+    # Intra-package import here to avoid circular import problems.
+    from Header import decode_header
+    L = decode_header(s)
+    if not isinstance(L, ListType):
+        # s wasn't decoded
+        return s
+
     rtn = []
-    parts = ecre.split(s, 1)
-    while parts:
-        # If there are less than 4 parts, it can't be encoded and we're done
-        if len(parts) < 5:
-            rtn.extend(parts)
-            break
-        # The first element is any non-encoded leading text
-        rtn.append(parts[0])
-        charset = parts[1]
-        encoding = parts[2].lower()
-        atom = parts[3]
-        # The next chunk to decode should be in parts[4]
-        parts = ecre.split(parts[4])
-        # The encoding must be either `q' or `b', case-insensitive
-        if encoding == 'q':
-            func = _qdecode
-        elif encoding == 'b':
-            func = _bdecode
+    for atom, charset in L:
+        if charset is None:
+            rtn.append(atom)
         else:
-            func = _identity
-        # Decode and get the unicode in the charset
-        rtn.append(unicode(func(atom), charset))
+            # Convert the string to Unicode using the given encoding.  Leave
+            # Unicode conversion errors to strict.
+            rtn.append(unicode(atom, charset))
     # Now that we've decoded everything, we just need to join all the parts
     # together into the final string.
     return UEMPTYSTRING.join(rtn)
@@ -96,6 +141,7 @@ def decode(s):
 
 def encode(s, charset='iso-8859-1', encoding='q'):
     """Encode a string according to RFC 2047."""
+    warnings.warn('Use Header.Header.encode() instead.', DeprecationWarning, 2)
     encoding = encoding.lower()
     if encoding == 'q':
         estr = _qencode(s)
@@ -150,3 +196,48 @@ def formatdate(timeval=None, localtime=0):
          'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'][now[1] - 1],
         now[0], now[3], now[4], now[5],
         zone)
+
+
+
+def make_msgid(idstring=None):
+    """Returns a string suitable for RFC 2822 compliant Message-ID:, e.g:
+
+    <20020201195627.33539.96671@nightshade.la.mastaler.com>
+
+    Optional idstring if given is a string used to strengthen the
+    uniqueness of the Message-ID, otherwise an empty string is used.
+    """
+    timeval = time.time()
+    utcdate = time.strftime('%Y%m%d%H%M%S', time.gmtime(timeval))
+    pid = os.getpid()
+    randint = random.randrange(100000)
+    if idstring is None:
+        idstring = ''
+    else:
+        idstring = '.' + idstring
+    idhost = socket.getfqdn()
+    msgid = '<%s.%s.%s%s@%s>' % (utcdate, pid, randint, idstring, idhost)
+    return msgid
+
+
+
+# These functions are in the standalone mimelib version only because they've
+# subsequently been fixed in the latest Python versions.  We use this to worm
+# around broken older Pythons.
+def parsedate(data):
+    if not data:
+        return None
+    return _parsedate(data)
+
+
+def parsedate_tz(data):
+    if not data:
+        return None
+    return _parsedate_tz(data)
+
+
+def parseaddr(addr):
+    realname, emailaddr = _parseaddr(addr)
+    if realname == '' and emailaddr is None:
+        return '', ''
+    return realname, emailaddr
diff --git a/Lib/email/__init__.py b/Lib/email/__init__.py
index c13495b..f4a5b76 100644
--- a/Lib/email/__init__.py
+++ b/Lib/email/__init__.py
@@ -1,14 +1,16 @@
-# Copyright (C) 2001 Python Software Foundation
+# Copyright (C) 2001,2002 Python Software Foundation
 # Author: barry@zope.com (Barry Warsaw)
 
 """A package for parsing, handling, and generating email messages.
 """
 
-__version__ = '1.0'
+__version__ = '2.0'
 
-__all__ = ['Encoders',
+__all__ = ['Charset',
+           'Encoders',
            'Errors',
            'Generator',
+           'Header',
            'Iterators',
            'MIMEAudio',
            'MIMEBase',
@@ -18,6 +20,8 @@ __all__ = ['Encoders',
            'Message',
            'Parser',
            'Utils',
+           'base64MIME',
+           'quopriMIME',
            'message_from_string',
            'message_from_file',
            ]
diff --git a/Lib/email/base64MIME.py b/Lib/email/base64MIME.py
new file mode 100644
index 0000000..08420b2
--- /dev/null
+++ b/Lib/email/base64MIME.py
@@ -0,0 +1,174 @@
+# Copyright (C) 2002 Python Software Foundation
+# Author: che@debian.org (Ben Gertzfield)
+
+"""Base64 content transfer encoding per RFCs 2045-2047.
+
+This module handles the content transfer encoding method defined in RFC 2045
+to encode arbitrary 8-bit data using the three 8-bit bytes in four 7-bit
+characters encoding known as Base64.
+
+It is used in the MIME standards for email to attach images, audio, and text
+using some 8-bit character sets to messages.
+
+This module provides an interface to encode and decode both headers and bodies
+with Base64 encoding.
+
+RFC 2045 defines a method for including character set information in an
+`encoded-word' in a header.  This method is commonly used for 8-bit real names
+in To:, From:, Cc:, etc. fields, as well as Subject: lines.
+
+This module does not do the line wrapping or end-of-line character conversion
+necessary for proper internationalized headers; it only does dumb encoding and
+decoding.  To deal with the various line wrapping issues, use the email.Header
+module.
+"""
+
+import re
+from binascii import b2a_base64, a2b_base64
+from email.Utils import fix_eols
+
+CRLF = '\r\n'
+NL = '\n'
+EMPTYSTRING = ''
+
+# See also Charset.py
+MISC_LEN = 7
+
+
+
+# Helpers
+def base64_len(s):
+    """Return the length of s when it is encoded with base64."""
+    groups_of_3, leftover = divmod(len(s), 3) 
+    # 4 bytes out for each 3 bytes (or nonzero fraction thereof) in. 
+    # Thanks, Tim!
+    n = groups_of_3 * 4 
+    if leftover: 
+        n += 4 
+    return n 
+
+
+
+def header_encode(header, charset='iso-8859-1', keep_eols=0, maxlinelen=76,
+                  eol=NL):
+    """Encode a single header line with Base64 encoding in a given charset.
+    
+    Defined in RFC 2045, this Base64 encoding is identical to normal Base64
+    encoding, except that each line must be intelligently wrapped (respecting
+    the Base64 encoding), and subsequent lines must start with a space.
+
+    charset names the character set to use to encode the header.  It defaults
+    to iso-8859-1.
+
+    End-of-line characters (\\r, \\n, \\r\\n) will be automatically converted
+    to the canonical email line separator \\r\\n unless the keep_eols
+    parameter is set to true (the default is false).
+
+    Each line of the header will be terminated in the value of eol, which
+    defaults to "\\n".  Set this to "\\r\\n" if you are using the result of
+    this function directly in email.
+
+    The resulting string will be in the form:
+
+    "=?charset?b?WW/5ciBtYXp66XLrIHf8eiBhIGhhbXBzdGHuciBBIFlv+XIgbWF6euly?=\\n
+      =?charset?b?6yB3/HogYSBoYW1wc3Rh7nIgQkMgWW/5ciBtYXp66XLrIHf8eiBhIGhh?="
+      
+    with each line wrapped at, at most, maxlinelen characters (defaults to 76
+    characters).
+    """
+    # Return empty headers unchanged
+    if not header:
+        return header
+
+    if not keep_eols:
+        header = fix_eols(header)
+    
+    # Base64 encode each line, in encoded chunks no greater than maxlinelen in
+    # length, after the RFC chrome is added in.
+    base64ed = []
+    max_encoded = maxlinelen - len(charset) - MISC_LEN
+    max_unencoded = max_encoded * 3 / 4
+
+    # BAW: Ben's original code used a step of max_unencoded, but I think it
+    # ought to be max_encoded.  Otherwise, where's max_encoded used?  I'm
+    # still not sure what the 
+    for i in range(0, len(header), max_unencoded):
+        base64ed.append(b2a_base64(header[i:i+max_unencoded]))
+
+    # Now add the RFC chrome to each encoded chunk
+    lines = []
+    for line in base64ed:
+        # Ignore the last character of each line if it is a newline
+        if line[-1] == NL:
+            line = line[:-1]
+        # Add the chrome
+        lines.append('=?%s?b?%s?=' % (charset, line))
+    # Glue the lines together and return it.  BAW: should we be able to
+    # specify the leading whitespace in the joiner?
+    joiner = eol + ' '
+    return joiner.join(lines)
+
+
+
+def encode(s, binary=1, maxlinelen=76, eol=NL):
+    """Encode a string with base64.
+
+    Each line will be wrapped at, at most, maxlinelen characters (defaults to
+    76 characters).
+
+    If binary is false, end-of-line characters will be converted to the
+    canonical email end-of-line sequence \\r\\n.  Otherwise they will be left
+    verbatim (this is the default).
+
+    Each line of encoded text will end with eol, which defaults to "\\n".  Set
+    this to "\r\n" if you will be using the result of this function directly
+    in an email.
+    """
+    if not s:
+        return s
+    
+    if not binary:
+        s = fix_eols(s)
+        
+    encvec = []
+    max_unencoded = maxlinelen * 3 / 4
+    for i in range(0, len(s), max_unencoded):
+        # BAW: should encode() inherit b2a_base64()'s dubious behavior in
+        # adding a newline to the encoded string?
+        enc = b2a_base64(s[i:i + max_unencoded])
+        if enc[-1] == NL and eol <> NL:
+            enc = enc[:-1] + eol
+        encvec.append(enc)
+    return EMPTYSTRING.join(encvec)
+
+
+# For convenience and backwards compatibility w/ standard base64 module
+body_encode = encode
+encodestring = encode
+
+
+
+def decode(s, convert_eols=None):
+    """Decode a raw base64 string.
+
+    If convert_eols is set to a string value, all canonical email linefeeds,
+    e.g. "\\r\\n", in the decoded text will be converted to the value of
+    convert_eols.  os.linesep is a good choice for convert_eols if you are
+    decoding a text attachment.
+
+    This function does not parse a full MIME header value encoded with
+    base64 (like =?iso-8895-1?b?bmloISBuaWgh?=) -- please use the high
+    level email.Header class for that functionality.
+    """
+    if not s:
+        return s
+    
+    dec = a2b_base64(s)
+    if convert_eols:
+        return dec.replace(CRLF, convert_eols)
+    return dec
+
+
+# For convenience and backwards compatibility w/ standard base64 module
+body_decode = decode
+decodestring = decode
diff --git a/Lib/email/quopriMIME.py b/Lib/email/quopriMIME.py
new file mode 100644
index 0000000..002034e
--- /dev/null
+++ b/Lib/email/quopriMIME.py
@@ -0,0 +1,312 @@
+# Copyright (C) 2001,2002 Python Software Foundation
+# Author: che@debian.org (Ben Gertzfield)
+
+"""Quoted-printable content transfer encoding per RFCs 2045-2047.
+
+This module handles the content transfer encoding method defined in RFC 2045
+to encode US ASCII-like 8-bit data called `quoted-printable'.  It is used to
+safely encode text that is in a character set similar to the 7-bit US ASCII
+character set, but that includes some 8-bit characters that are normally not
+allowed in email bodies or headers.
+
+Quoted-printable is very space-inefficient for encoding binary files; use the
+email.base64MIME module for that instead.
+
+This module provides an interface to encode and decode both headers and bodies
+with quoted-printable encoding.
+
+RFC 2045 defines a method for including character set information in an
+`encoded-word' in a header.  This method is commonly used for 8-bit real names
+in To:/From:/Cc: etc. fields, as well as Subject: lines.
+
+This module does not do the line wrapping or end-of-line character
+conversion necessary for proper internationalized headers; it only
+does dumb encoding and decoding.  To deal with the various line
+wrapping issues, use the email.Header module.  
+"""
+
+import re
+from string import hexdigits
+from email.Utils import fix_eols
+
+CRLF = '\r\n'
+NL = '\n'
+
+# See also Charset.py
+MISC_LEN = 7
+
+hqre = re.compile(r'[^-a-zA-Z0-9!*+/ ]')
+bqre = re.compile(r'[^ !-<>-~\t]')
+
+
+
+# Helpers
+def header_quopri_check(c):
+    """Return true if the character should be escaped with header quopri."""
+    return hqre.match(c) and 1
+
+
+def body_quopri_check(c):
+    """Return true if the character should be escaped with body quopri."""
+    return bqre.match(c) and 1
+
+    
+def header_quopri_len(s):
+    """Return the length of str when it is encoded with header quopri."""
+    count = 0
+    for c in s:
+        if hqre.match(c):
+            count += 3
+        else:
+            count += 1
+    return count
+
+
+def body_quopri_len(str):
+    """Return the length of str when it is encoded with body quopri."""
+    count = 0
+    for c in str:
+        if bqre.match(c):
+            count += 3
+        else:
+            count += 1
+    return count
+
+
+def _max_append(L, s, maxlen, extra=''):
+    if not L:
+        L.append(s)
+    elif len(L[-1]) + len(s) < maxlen:
+        L[-1] += extra + s
+    else:
+        L.append(s)
+
+
+def unquote(s):
+    """Turn a string in the form =AB to the ASCII character with value 0xab"""
+    return chr(int(s[1:3], 16))
+
+
+def quote(c):
+    return "=%02X" % ord(c)
+
+
+
+def header_encode(header, charset="iso-8859-1", keep_eols=0, maxlinelen=76,
+                  eol=NL):
+    """Encode a single header line with quoted-printable (like) encoding.
+
+    Defined in RFC 2045, this `Q' encoding is similar to quoted-printable, but
+    used specifically for email header fields to allow charsets with mostly 7
+    bit characters (and some 8 bit) to remain more or less readable in non-RFC
+    2045 aware mail clients.
+
+    charset names the character set to use to encode the header.  It defaults
+    to iso-8859-1.
+
+    The resulting string will be in the form:
+
+    "=?charset?q?I_f=E2rt_in_your_g=E8n=E8ral_dire=E7tion?\\n
+      =?charset?q?Silly_=C8nglish_Kn=EEghts?="
+
+    with each line wrapped safely at, at most, maxlinelen characters (defaults
+    to 76 characters).
+
+    End-of-line characters (\\r, \\n, \\r\\n) will be automatically converted
+    to the canonical email line separator \\r\\n unless the keep_eols
+    parameter is set to true (the default is false).
+
+    Each line of the header will be terminated in the value of eol, which
+    defaults to "\\n".  Set this to "\\r\\n" if you are using the result of
+    this function directly in email.
+    """
+    # Return empty headers unchanged
+    if not header:
+        return header
+
+    if not keep_eols:
+        header = fix_eols(header)
+
+    # Quopri encode each line, in encoded chunks no greater than maxlinelen in
+    # lenght, after the RFC chrome is added in.
+    quoted = []
+    max_encoded = maxlinelen - len(charset) - MISC_LEN
+    
+    for c in header:
+        # Space may be represented as _ instead of =20 for readability
+        if c == ' ':
+            _max_append(quoted, '_', max_encoded)
+        # These characters can be included verbatim
+        elif not hqre.match(c):
+            _max_append(quoted, c, max_encoded)
+        # Otherwise, replace with hex value like =E2
+        else:
+            _max_append(quoted, "=%02X" % ord(c), max_encoded)
+
+    # Now add the RFC chrome to each encoded chunk and glue the chunks
+    # together.  BAW: should we be able to specify the leading whitespace in
+    # the joiner?
+    joiner = eol + ' '
+    return joiner.join(['=?%s?q?%s?=' % (charset, line) for line in quoted])
+
+
+
+def encode(body, binary=0, maxlinelen=76, eol=NL):
+    """Encode with quoted-printable, wrapping at maxlinelen characters.
+
+    If binary is false (the default), end-of-line characters will be converted
+    to the canonical email end-of-line sequence \\r\\n.  Otherwise they will
+    be left verbatim.
+
+    Each line of encoded text will end with eol, which defaults to "\\n".  Set
+    this to "\\r\\n" if you will be using the result of this function directly
+    in an email.
+
+    Each line will be wrapped at, at most, maxlinelen characters (defaults to
+    76 characters).  Long lines will have the `soft linefeed' quoted-printable
+    character "=" appended to them, so the decoded text will be identical to
+    the original text.
+    """
+    if not body:
+        return body
+
+    if not binary:
+        body = fix_eols(body)
+
+    # BAW: We're accumulating the body text by string concatenation.  That
+    # can't be very efficient, but I don't have time now to rewrite it.  It
+    # just feels like this algorithm could be more efficient.
+    encoded_body = ''
+    lineno = -1
+    # Preserve line endings here so we can check later to see an eol needs to
+    # be added to the output later.
+    lines = body.splitlines(1)
+    for line in lines:
+        # But strip off line-endings for processing this line.
+        if line.endswith(CRLF):
+            line = line[:-2]
+        elif line[-1] in CRLF:
+            line = line[:-1]
+            
+        lineno += 1
+        encoded_line = ''
+        prev = None
+        linelen = len(line)
+        # Now we need to examine every character to see if it needs to be
+        # quopri encoded.  BAW: again, string concatenation is inefficient.
+        for j in range(linelen):
+            c = line[j]
+            prev = c
+            if bqre.match(c):
+                c = quote(c)
+            elif j+1 == linelen:
+                # Check for whitespace at end of line; special case
+                if c not in ' \t':
+                    encoded_line += c
+                prev = c
+                continue
+            # Check to see to see if the line has reached its maximum length
+            if len(encoded_line) + len(c) >= maxlinelen:
+                encoded_body += encoded_line + '=' + eol
+                encoded_line = ''
+            encoded_line += c
+        # Now at end of line..
+        if prev and prev in ' \t':
+            # Special case for whitespace at end of file
+            if lineno+1 == len(lines):
+                prev = quote(prev)
+                if len(encoded_line) + len(prev) > maxlinelen:
+                    encoded_body += encoded_line + '=' + eol + prev
+                else:
+                    encoded_body += encoded_line + prev
+            # Just normal whitespace at end of line
+            else:
+                encoded_body += encoded_line + prev + '=' + eol
+            encoded_line = ''
+        # Now look at the line we just finished and it has a line ending, we
+        # need to add eol to the end of the line.
+        if lines[lineno].endswith(CRLF) or lines[lineno][-1] in CRLF:
+            encoded_body += encoded_line + eol
+        else:
+            encoded_body += encoded_line
+        encoded_line = ''
+    return encoded_body
+
+
+# For convenience and backwards compatibility w/ standard base64 module
+body_encode = encode
+encodestring = encode
+
+
+
+# BAW: I'm not sure if the intent was for the signature of this function to be
+# the same as base64MIME.decode() or not...
+def decode(encoded, eol=NL):
+    """Decode a quoted-printable string.
+
+    Lines are separated with eol, which defaults to \\n.
+    """
+    if not encoded:
+        return encoded
+    # BAW: see comment in encode() above.  Again, we're building up the
+    # decoded string with string concatenation, which could be done much more
+    # efficiently.
+    decoded = ''
+
+    for line in encoded.splitlines():
+        line = line.rstrip()
+        if not line:
+            decoded += eol
+            continue
+
+        i = 0
+        n = len(line)
+        while i < n:
+            c = line[i]
+            if c <> '=':
+                decoded += c
+                i += 1
+            # Otherwise, c == "=".  Are we at the end of the line?  If so, add
+            # a soft line break.
+            elif i+1 == n:
+                i += 1
+                continue
+            # Decode if in form =AB
+            elif i+2 < n and line[i+1] in hexdigits and line[i+2] in hexdigits:
+                decoded += unquote(line[i:i+3])
+                i += 3
+            # Otherwise, not in form =AB, pass literally
+            else:
+                decoded += c
+                i += 1
+
+            if i == n:
+                decoded += eol
+    # Special case if original string did not end with eol
+    if encoded[-1] <> eol and decoded[-1] == eol:
+        decoded = decoded[:-1]
+    return decoded
+
+
+# For convenience and backwards compatibility w/ standard base64 module
+body_decode = decode
+decodestring = decode
+
+
+
+def _unquote_match(match):
+    """Turn a match in the form =AB to the ASCII character with value 0xab"""
+    s = match.group(0)
+    return unquote(s)
+
+
+# Header decoding is done a bit differently
+def header_decode(s):
+    """Decode a string encoded with RFC 2045 MIME header `Q' encoding.
+
+    This function does not parse a full MIME header value encoded with
+    quoted-printable (like =?iso-8895-1?q?Hello_World?=) -- please use
+    the high level email.Header class for that functionality.
+    """
+    s = s.replace('_', ' ')
+    return re.sub(r'=\w{2}', _unquote_match, s)