mirror of
https://github.com/python/cpython.git
synced 2025-11-03 03:22:27 +00:00
3638e487b9
svn+ssh://pythondev@svn.python.org/python/trunk ........ r71572 | georg.brandl | 2009-04-13 15:13:25 +0200 (Mo, 13 Apr 2009) | 1 line #5745: more linking for identifiers in email docs. ........
57 lines
2.1 KiB
ReStructuredText
57 lines
2.1 KiB
ReStructuredText
:mod:`email`: Encoders
|
|
----------------------
|
|
|
|
.. module:: email.encoders
|
|
:synopsis: Encoders for email message payloads.
|
|
|
|
|
|
When creating :class:`~email.message.Message` objects from scratch, you often
|
|
need to encode the payloads for transport through compliant mail servers. This
|
|
is especially true for :mimetype:`image/\*` and :mimetype:`text/\*` type messages
|
|
containing binary data.
|
|
|
|
The :mod:`email` package provides some convenient encodings in its
|
|
:mod:`encoders` module. These encoders are actually used by the
|
|
:class:`~email.mime.audio.MIMEAudio` and :class:`~email.mime.image.MIMEImage`
|
|
class constructors to provide default encodings. All encoder functions take
|
|
exactly one argument, the message object to encode. They usually extract the
|
|
payload, encode it, and reset the payload to this newly encoded value. They
|
|
should also set the :mailheader:`Content-Transfer-Encoding` header as appropriate.
|
|
|
|
Here are the encoding functions provided:
|
|
|
|
|
|
.. function:: encode_quopri(msg)
|
|
|
|
Encodes the payload into quoted-printable form and sets the
|
|
:mailheader:`Content-Transfer-Encoding` header to ``quoted-printable`` [#]_.
|
|
This is a good encoding to use when most of your payload is normal printable
|
|
data, but contains a few unprintable characters.
|
|
|
|
|
|
.. function:: encode_base64(msg)
|
|
|
|
Encodes the payload into base64 form and sets the
|
|
:mailheader:`Content-Transfer-Encoding` header to ``base64``. This is a good
|
|
encoding to use when most of your payload is unprintable data since it is a more
|
|
compact form than quoted-printable. The drawback of base64 encoding is that it
|
|
renders the text non-human readable.
|
|
|
|
|
|
.. function:: encode_7or8bit(msg)
|
|
|
|
This doesn't actually modify the message's payload, but it does set the
|
|
:mailheader:`Content-Transfer-Encoding` header to either ``7bit`` or ``8bit`` as
|
|
appropriate, based on the payload data.
|
|
|
|
|
|
.. function:: encode_noop(msg)
|
|
|
|
This does nothing; it doesn't even set the
|
|
:mailheader:`Content-Transfer-Encoding` header.
|
|
|
|
.. rubric:: Footnotes
|
|
|
|
.. [#] Note that encoding with :meth:`encode_quopri` also encodes all tabs and space
|
|
characters in the data.
|
|
|