GitHub login redirects to main Trac page instead of the page I was on

[ryandesign (Ryan Carsten Schmidt)]

If I use the Login link, and I haven't yet logged in, and I go through the GitHub login process, I'm redirected back to the main Trac page instead of the page I was on.

(You can simulate not having logged in before by using your web browser's private browsing function, which hides your existing login cookies.)

[raimue (Rainer Müller)]

Note that using /login adds another a redirect to /github/login first. I only added that because of ​trac-github#95. The link in the navigation points to /github/login.

I can reproduce this with a browser session that was never logged in.

The original URL seems to be lost in trac-github with the redirects to GitHub for authorization and then back to the callback URL. The LoginModule will try to redirect back to the referer, which will probably be empty or the GitHub URL (have not checked). Therefore ​this redirect drops the user to the front page without a better target.

[ryandesign (Ryan Carsten Schmidt)]

So how do we fix it? Or, is it a bug in the trac-github module? I looked through the issues of the trac-github module and didn't find a report of this problem. If it's their bug, I should report it to them.

[neverpanic (Clemens Lang)]

I think this is exactly the problem described by ​trac-github#95. The proposed solution there is to set the auth_path_prefix to an empty string, since we don't have any other login modules on our trac instance and hence do not need the functionality of not overriding the standard login URL. That should fix the issue.

[raimue (Rainer Müller)]

I don't think ​trac-github#95 solves this particular problem, because going through the external redirects to github.com for OAuth2 will still lose the original referrer that the LoginModule wants to use.