mod_proxy_fcgi: Support Dynamic Buffering for Large FastCGI Headers#522
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arturobernalg wants to merge 1 commit intoapache:trunkfrom
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mod_proxy_fcgi: Support Dynamic Buffering for Large FastCGI Headers#522arturobernalg wants to merge 1 commit intoapache:trunkfrom
arturobernalg wants to merge 1 commit intoapache:trunkfrom
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notroj
reviewed
Mar 11, 2025
modules/proxy/mod_proxy_fcgi.c
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| return 0; | ||
| } | ||
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| /** |
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This part should be added to the varbuf API in server/util.c or else the existing ap_varbuf_* should be used, IMO.
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sound reasonable move it to server/util.c
modules/proxy/mod_proxy_fcgi.c
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| ob = apr_brigade_create(r->pool, c->bucket_alloc); | ||
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| /* Create our dynamic header buffer for large headers */ | ||
| ap_varbuf *header_vb = NULL; |
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Declaration should be at the top of the function, this is causing the CI failures.
arturobernalg
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This patch fixes Bug 64919 by replacing the fixed 8192‐byte header buffer with a dynamically resizable buffer that can handle arbitrarily long headers. It also adds a trimming step to remove any leading whitespace from the header data before parsing, ensuring that FastCGI responses are correctly interpreted.
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Hey @notroj & @arturobernalg! Wondering if there is more work needed here or if there's additional steps to take. Happy to help out if so! :) |
bukka
reviewed
Dec 3, 2025
| * headers, so this part of the data will need | ||
| * to persist. */ | ||
| apr_bucket_setaside(b, setaside_pool); | ||
| } |
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this needs probably change indent for the above code...
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This pull request implements a dynamic header buffer in mod_proxy_fcgi to resolve Bug 64919. Previously, mod_proxy_fcgi used a fixed 8192-byte buffer to parse FastCGI headers, which caused failures when PHP-FPM (or similar backends) generated headers exceeding that size. With this patch, a dynamically resizable buffer is used so that arbitrarily large headers are handled gracefully.