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#12586: add provisional email policy with new header parsing and folding.

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When the new policies are used (and only when the new policies are explicitly
used) headers turn into objects that have attributes based on their parsed
values, and can be set using objects that encapsulate the values, as well as
set directly from unicode strings.  The folding algorithm then takes care of
encoding unicode where needed, and folding according to the highest level
syntactic objects.

With this patch only date and time headers are parsed as anything other than
unstructured, but that is all the helper methods in the existing API handle.
I do plan to add more parsers, and complete the set specified in the RFC
before the package becomes stable.
This commit is contained in:
R David Murray 2012-05-25 18:42:14 -04:00
parent 0fa2edd08f
commit 0b6f6c82b5
16 changed files with 6992 additions and 114 deletions
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11
Lib/email/generator.py
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@ -95,9 +95,15 @@ class Generator:
self._encoded_NL = self._encode(self._NL)
self._EMPTY = ''
self._encoded_EMTPY = self._encode('')
p = self.policy
# Because we use clone (below) when we recursively process message
# subparts, and because clone uses the computed policy (not None),
# submessages will automatically get set to the computed policy when
# they are processed by this code.
old_gen_policy = self.policy
old_msg_policy = msg.policy
try:
self.policy = policy
msg.policy = policy
if unixfrom:
ufrom = msg.get_unixfrom()
if not ufrom:
@ -105,7 +111,8 @@ class Generator:
self.write(ufrom + self._NL)
self._write(msg)
finally:
self.policy = p
self.policy = old_gen_policy
msg.policy = old_msg_policy
def clone(self, fp):
"""Clone this generator with the exact same options."""