tree ac9f8553d70df6478f113424d69dcc01eeaafaf9
parent 013a89927bd67d56703749602fefdcc1ad0ff970
author Gary Burd <gary@beagledreams.com> 1433973115 -0700
committer Gary Burd <gary@beagledreams.com> 1434343426 -0700

Handle vanity redirect to godoc.org

Gddo assumes that the project URL for a vanity import is the page
containing the go-import meta tag for the vanity path.

This change sets the project URL to the resolved package project URL in
the case where the page uses an http-equiv meta tag to redirect the user
back to godoc.org.

Here's an example. The vanity import path "rsc.io/benchstat" resolves to
"gitbub.com/rsc/benchstat". The page at "http://rsc.io/benchstat" has an
http-equiv meta tag the refreshes to "https://godoc.org/rsc.io/benchstat".

Prior to this change, the project name in the gray banner at the top of
the package documentation page linked to "http://rsc.io/benchstat". The
page on rsc.io redirects the user back to the package documentation
page. Clicking the link is a noop.

After this change, the project name in the gray banner links to
https://github.com/rsc/benchstat".

This is a partial fix to issue #270. This change does not handle the
case  where the vanity server responds with an HTTP redirect when
?go-get=1 query is not specified.