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mod_proxy_fcgi: Handle CGI Local Redirect Responses - #810
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* modules/proxy/mod_proxy_fcgi.c (dispatch): Recognize a CGI Local Redirect Response (RFC 3875, 6.2.2), a Location with a local URI path and no other header, read the rest of the response and remember the URI. (fcgi_request_status): New, does the internal redirect once the connection to the backend has been released, like mod_proxy_scgi. * test/modules/proxy/fcgi_faker.py, test_07_fcgi_local_redirect.py: New. * test/modules/proxy/env.py: Load proxy_fcgi. * docs/log-message-tags/next-number: Update. PR: 61430
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mod_proxy_fcgi did not handle CGI Local Redirect Responses as required by RFC 3875 section 6.2.2. A FastCGI response containing only a local Location header was forwarded to the client instead of being processed as an internal redirect.
The change detects this response form, drains the FastCGI request normally, releases the backend connection, and performs the internal redirect afterwards.
Includes regression coverage for local redirects, query strings, POST/HEAD handling, backend connection reuse, external redirects, and normal FastCGI responses.