Allow setups behind proxy, by allowing filtering of bp_get_requested_url

[calin]

Currently there are some issues with running buddypress behind proxy, because the requested url is not filtered so it cannot be modified and replaced with the actual real URL.

If your site is running in the following configuration, www.site.com -> backend.site.com, with www.site.com being the one facing the internet, the requested_url will be constructed with backend.site.com which will invalidate the nonces and cause redirects (with possible redirect loops) to invalid canonical urls.

[calin]

the patch against bp 1.6.1

[boonebgorges]

Great suggestion. This is a minimal fix for BP 1.7.

Is there anything BP can do to piggyback on WP for proxy setups? I haven't worked with this before. It looks like WP does have support in class-http.php for sending HTTP requests through a proxy, but I don't see anything in canonical.php that takes account of proxy setups while calculating redirect URLs. How do you handle this, calin?

[calin]

Hi, this patch is useful for running buddypress behind a reverse proxy, eg. have nginx frontend and apache as backend and not for making HTTP requests using a proxy.

For example you can have a setup where buddypress runs on apache with localhost as hostname and then you have a filter on wordpress's site_url which turns all your ​http://localhost/members/foo/ to ​http://example.com/members/foo/ and you proxy that through nginx, on hostname example.com.

So user enters in his browser ​http://example.com/members/foo/, but the request hits the apache backend with ​http://localhost/members/foo/ which will issue a redirect to ​http://example.com/members/foo/ and you end up with a loop.

This patch allows you to rewrite the actual requested URL in such cases.

[djpaul]

(In [6355]) Add filter to bp_get_requested_url(). Fixes #4478, props calin

[DJPaul]

Thanks for the patch. If there's anything you find we can improve in BuddyPress to enable this sort of set up, please let us know. Also, it might be useful for others if you consider writing a blog post or perhaps a page on codex.BuddyPress.org about this technique. :)