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Opened 4 months ago

#60143 new defect (bug)

Running behind HAProxy with fcgi makes WordPress think URL rewriting is unavailable

Reported by: nebulon42's profile nebulon42 Owned by:
Milestone: Awaiting Review Priority: normal
Severity: normal Version: 6.4.2
Component: Permalinks Keywords:
Focuses: Cc:


I have WordPress set up behind HAProxy which directly uses fcgi for PHP and nginX for static files. HAProxy sends $_SERVER['SERVER_SOFTWARE'] = 'HAProxy 2.3.20-1ppa1~focal'. As a result in Settings > Permalinks I'm having index.php prefixes for permalinks. If I do not change permalink settings rewriting works just fine but as soon as I make changes I'm set for index.php in the permalinks as then the rewrite rules are updated.

WordPress here incorrectly infers that URL rewriting might be unavailable. If I trick WordPress into believing I'm running on nginX by making HAProxy sending $_SERVER['SERVER_SOFTWARE'] = 'nginx' rewriting works fine and the index.php prefix for permalinks is gone.

This might be resolved by adding a condition for HAProxy in got_url_rewrite() and defining a is_haproxy global similar to the one for nginX which then checks if the SERVER_SOFTWARE contains HAProxy.

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