[Haskell-cafe] http-client: proxy environment variable support

[Michael Snoyman]

Definitely, that's part of the changeset already.

On Mon Jan 19 2015 at 4:33:25 PM Miguel Mitrofanov <miguelimo38 at yandex.ru>
wrote:

> I think it might be good to also allow user to explicitly require not to
> use proxy, even if it's set in environment.
>
> 19.01.2015, 16:53, "Michael Snoyman" <michael at snoyman.com>:
> > Neil Mitchell opened an issue[1] for http_proxy and https_proxy
> environment variable support in http-client. I've written that support, and
> it's ready to go, but there's an open question: what should the default
> behavior be? In particular, should environment variables, by default, be
> checked to determine the proxy, or not? Arguments each way:
> >
> > In favor of using environment variables:
> > * Matches behavior of many other tools and libraries
> > * Allows application users control without requiring a code change from
> application writers
> >
> > Against using environment variables:
> > * It's a change in behavior vs what http-client does today (though that
> could certainly be seen as just a missing feature)
> > * Environment variables will implicitly change the behavior of code,
> which generally speaking can be problematic
> >
> > I'm leaning towards having the default behavior be:
> >
> > * If the user explicitly chooses a proxy setting on the manager, use that
> > * If the user explicitly sets a proxy value on the Request, use that
> > * If the environment variable is set, use that
> > * Otherwise, no proxy
> >
> > In addition to whether we should make this change in behavior, I'm also
> interested in whether people think this should require a major version bump.
> >
> > [1] https://github.com/snoyberg/http-client/issues/94
> > ,
> >
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>
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