[zope2-tracker] [Bug 143873] Re: getPreferredCharsets() returns iso-8859-1 and not utf-8 when HTTP_ACCEPT_CHARSET not present in request

[Charlie_X]

I don't think the sending back [] is of any use to man nor beast. From
the w3c specification:

"""If no Accept-Charset header is present, the default is that any
character set is acceptable. If an Accept-Charset header is present, and
if the server cannot send a response which is acceptable according to
the Accept-Charset header, then the server SHOULD send an error response
with the 406 (not acceptable) status code, though the sending of an
unacceptable response is also allowed."""
(http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html)

So, we have two choices:

1) send default_zpublisher_encode, which defaults to Latin-15 if not set
explicitly

2) explicitly set UTF-8 as the comments in http.py propose for other
situations

While I would like default_zpublisher_encode to default to UTF-8 and use
that I can imagine such a change potentially causing problems for ZMI
work and should be handled separately. I propose, therefore, to return
UTF-8 where the client does not set this header.

-- 
getPreferredCharsets() returns iso-8859-1 and not utf-8 when HTTP_ACCEPT_CHARSET not present in request
https://bugs.launchpad.net/bugs/143873
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