Update and [issue2275]

Its been sometime since I posted my progress. Well, I traveled out of town for
a weekend, and then I could get back into groove immediately. Just realized
that its been more than a week.
Things will be much faster now and I hope not to get into unplanned travel
schedules.

Okay, coming back. I started working on issue2275, which is causing much
debate.

With the discussion, I realized that there is an "difference in opinion" in
fixing the bug. I had assumed that Headers dictionary should be
"User-Agent"="Mozilla Form", and the currently it is in "User-agent" ="Mozilla
form".

For Backward compatiblity purposes, looks like we will have to maintain
capitalize() form and then provide the title() cases to other methods and also
implement the .headers methods.

After much thought into this discussion and reading some of the articles, I
come to think that.

Apart from the current functionality of the headers.

1) .headers public interface.
2) get_header method returning titled()
3) get_header items method returning titled()

Would be desirable.

I referenced Python 2.3.8 Library Docs and found that those methods were not
there and has been implemented from Python 2.4 only.

So, I looking into those two older releases to see where this is change surface
in and fix things specific to that change, so that older code does not break
in.

> John J Lee <jjlee@users.sourceforge.net> added the comment:
>
> > With respect to point 1), I assume that we all agree upon that headers
> > should stored in Titled-Format instead of Capitalized-format.
>
> I would probably choose to store the headers in Capitalized-form,
> because that makes implementing .headers trivial.
>
> [...]
> > Now, if we go for a Case Normalization at the much later stage, will the
> > headers be stored still in capitalize() format? ( In that case, this bug
> > requests it be stored in .titled() format confirming to many practices)
> > Would you like to explain a bit more on that?
>
> Implement .get_header() and friends using .headers, along the lines of:
>
> def get_header(self, header_name, default=None):
> return self.headers.get(
> header_name,
> self.unredirected_hdrs.get(header_name, default)).title()
>
> And then ensure that the headers actually passed to httplib also get
> .title()-cased. This also has the benefit, compared with your patch, of
> leaving the behaviour of non-HTTP URL schemes unchanged.
>