The email package version 1.0, prototyped as mimelib
<http://sf.net/projects/mimelib>. There /are/ API differences between
mimelib and email, but most of the implementations are shared (except
where cool Py2.2 stuff like generators are used).
diff --git a/Lib/email/Encoders.py b/Lib/email/Encoders.py
new file mode 100644
index 0000000..36db370
--- /dev/null
+++ b/Lib/email/Encoders.py
@@ -0,0 +1,68 @@
+# Copyright (C) 2001 Python Software Foundation
+# Author: barry@zope.com (Barry Warsaw)
+
+"""Module containing encoding functions for Image.Image and Text.Text.
+"""
+
+import base64
+from quopri import encodestring as _encodestring
+
+
+
+# Helpers
+def _qencode(s):
+ return _encodestring(s, quotetabs=1)
+
+def _bencode(s):
+ # We can't quite use base64.encodestring() since it tacks on a "courtesy
+ # newline". Blech!
+ if not s:
+ return s
+ hasnewline = (s[-1] == '\n')
+ value = base64.encodestring(s)
+ if not hasnewline and value[-1] == '\n':
+ return value[:-1]
+ return value
+
+
+
+def encode_base64(msg):
+ """Encode the message's payload in Base64.
+
+ Also, add an appropriate Content-Transfer-Encoding: header.
+ """
+ orig = msg.get_payload()
+ encdata = _bencode(orig)
+ msg.set_payload(encdata)
+ msg['Content-Transfer-Encoding'] = 'base64'
+
+
+
+def encode_quopri(msg):
+ """Encode the message's payload in Quoted-Printable.
+
+ Also, add an appropriate Content-Transfer-Encoding: header.
+ """
+ orig = msg.get_payload()
+ encdata = _qencode(orig)
+ msg.set_payload(encdata)
+ msg['Content-Transfer-Encoding'] = 'quoted-printable'
+
+
+
+def encode_7or8bit(msg):
+ """Set the Content-Transfer-Encoding: header to 7bit or 8bit."""
+ orig = msg.get_payload()
+ # 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:
+ orig.encode('ascii')
+ except UnicodeError:
+ msg['Content-Transfer-Encoding'] = '8bit'
+ else:
+ msg['Content-Transfer-Encoding'] = '7bit'
+
+
+
+def encode_noop(msg):
+ """Do nothing."""