Wordpress LScache Plugin: Cache miss on Form POST
Last Updated on: Wed, 15 Apr 2026 00:00:02 Hello, I would like to build a custom form and handle the POST data on a wordpress page. This works okay with add_filter to create dynamic content. Litespeed shows strange behavior though when calling the page in the form action field ? the resulting page will not be served form cache nor will css minimize jump in. I separated the problem to a difference between GET and POST. When I redirect to a page with GET, the cache will work. If I use POST, the cache is missed. https://yoonde.de/test/ Example page shows GET and POST button. Please open inspector to follow network traffic and see the difference. Any help appreciated. Regards Chris The page I need help with: https://yoonde.de/test/ Hi, LiteSpeed Cache only caches GET , it wont cache POST Best regards, Hello qtwrk, I would understand, that it wont be cached for privacy reasons, but minify/combining of css/js files is also not working on the POST request. Why is that? Regards, Chris Hi, Please enable debug log , it will say why or what happened. Best regards, Hi qtwrk, here is the part from debug.log I guess what you mean is X Cache_control off ? not GET method:POST . Not caching POST data is ok, but why is optimization skipped? Thank you for your help. Regards, Chris ??????????????????????????? 05/27/20 06:29:16.500 [109.91.32.181:60812 1 QjW] ??POST HTTP/1.1 (HTTPS) /dashboard 05/27/20 06:29:16.500 [109.91.32.181:60812 1 QjW] Query String: 05/27/20 06:29:16.500 [109.91.32.181:60812 1 QjW] HTTP_REFERER: https://yoonde.de/dashboard/ 05/27/20 06:29:16.500 [109.91.32.181:60812 1 QjW] User Agent: Mozilla/5.0 (Macintosh Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36 05/27/20 06:29:16.500 [109.91.32.181:60812 1 QjW] Accept: text/html,application/xhtml+xml,application/xml q=0.9,image/webp,image/apng, / q=0.8,application/signed-exchange v=b3 q=0.9 05/27/20 06:29:16.500 [109.91.32.181:60812 1 QjW] Accept Encoding: gzip, deflate, br 05/27/20 06:29:16.500 [109.91.32.181:60812 1 QjW] X-LSCACHE: true 05/27/20 06:29:16.500 [109.91.32.181:60812 1 QjW] LSCACHE_VARY_VALUE: +webp 05/27/20 06:29:16.522 [109.91.32.181:60812 1 QjW] [Ctrl] X Cache_control -> stale 05/27/20 06:29:16.535 [109.91.32.181:60812 1 QjW] [Router] get_uid: 0 => LiteSpeed Router::get_uid()@232 => LiteSpeed Router::get_role()@251 => LiteSpeed Conf->in_optm_exc_roles()@653 => LiteSpeed LSC->after_user_init()@192 05/27/20 06:29:16.535 [109.91.32.181:60812 1 QjW] [Router] get_role: 05/27/20 06:29:16.535 [109.91.32.181:60812 1 QjW] [Media] init 05/27/20 06:29:16.535 [109.91.32.181:60812 1 QjW] [Placeholder] init 05/27/20 06:29:16.535 [109.91.32.181:60812 1 QjW] [CDN] init 05/27/20 06:29:16.535 [109.91.32.181:60812 1 QjW] Task init 05/27/20 06:29:16.535 [109.91.32.181:60812 1 QjW] [Router] LSCWP_CTRL bypassed empty 05/27/20 06:29:16.536 [109.91.32.181:60812 1 QjW] [GUI] init 05/27/20 06:29:16.542 [109.91.32.181:60812 1 QjW] [Ctrl] X Cache_control init on 05/27/20 06:29:16.595 [109.91.32.181:60812 1 QjW] [Media] webp replacing: https://yoonde.de/wp-content/uploads/2020/04/yoonde_logo.png => LiteSpeed Media->replace_webp(https://yoonde.de/wp-content/uploads/2020/04/yoonde_logo.png)@862 => LiteSpeed Media->webp_srcset(ARRAY)@845 => WP_Hook->apply_filters(ARRAY,ARRAY)@289 => /home/yogaalac/yoonde/wp-includes/media.php@206 05/27/20 06:29:16.595 [109.91.32.181:60812 1 QjW] [Media] ? replaced to: https://yoonde.de/wp-content/uploads/2020/04/yoonde_logo.png.webp 05/27/20 06:29:16.595 [109.91.32.181:60812 1 QjW] [Media] webp replacing: https://yoonde.de/wp-content/uploads/2020/04/yoonde_logo-300?93.png => LiteSpeed Media->replace_webp(https://yoonde.de/wp-content/uploads/2020/04/yoonde_logo-300?93.png)@862 => LiteSpeed Media->webp_srcset(ARRAY)@845 => WP_Hook->apply_filters(ARRAY,ARRAY)@289 => /home/yogaalac/yoonde/wp-includes/media.php@206 05/27/20 06:29:16.595 [109.91.32.181:60812 1 QjW] [Media] ? replaced to: https://yoonde.de/wp-content/uploads/2020/04/yoonde_logo-300?93.png.webp 05/27/20 06:29:16.677 [109.91.32.181:60812 1 QjW] [Core] Footer hook called 05/27/20 06:29:16.680 [109.91.32.181:60812 1 QjW] [Core] CHK html bypass: not get method POST 05/27/20 06:29:16.680 [109.91.32.181:60812 1 QjW] [Ctrl] X Cache_control off ? not GET method:POST 05/27/20 06:29:16.680 [109.91.32.181:60812 1 QjW] [Ctrl] X Cache_control -> no Cache => LiteSpeed Control::set_nocache()@381 => LiteSpeed Control::finalize()@640 => LiteSpeed LSC->send_headers()@466 05/27/20 06:29:16.680 [109.91.32.181:60812 1 QjW] [Router] get_role: 05/27/20 06:29:16.680 [109.91.32.181:60812 1 QjW] [Vary] role id: failed, guest 05/27/20 06:29:16.680 [109.91.32.181:60812 1 QjW] [Router] get_role: 05/27/20 06:29:16.680 [109.91.32.181:60812 1 QjW] [Router] get_role: 05/27/20 06:29:16.680 [109.91.32.181:60812 1 QjW] [Vary] no custimzed vary 05/27/20 06:29:16.680 [109.91.32.181:60812 1 QjW] X-LiteSpeed-Cache-Control: no-cache 05/27/20 06:29:16.680 [109.91.32.181:60812 1 QjW] [Core] CHK html bypass: not get method POST 05/27/20 06:29:16.680 [109.91.32.181:60812 1 QjW] [Media] bypass: Not frontend HTML type 05/27/20 06:29:16.680 [109.91.32.181:60812 1 QjW] GUI bypassed by no counter 05/27/20 06:29:16.680 [109.91.32.181:60812 1 QjW] [Optm] bypass: Not frontend HTML type 05/27/20 06:29:16.680 [109.91.32.181:60812 1 QjW] CDN bypass 05/27/20 06:29:16.680 [109.91.32.181:60812 1 QjW] End response ??????????????????????????? Hi, From the log 05/27/20 06:29:16.680 [109.91.32.181:60812 1 QjW] [Core] CHK html bypass: not get method POST 05/27/20 06:29:16.680 [109.91.32.181:60812 1 QjW] [Media] bypass: Not frontend HTML type 05/27/20 06:29:16.680 [109.91.32.181:60812 1 QjW] GUI bypassed by no counter 05/27/20 06:29:16.680 [109.91.32.181:60812 1 QjW] [Optm] bypass: Not frontend HTML type the first line if ( $_SERVER[ REQUEST_METHOD ] !== GET ) Debug2::debug2( [Core] CHK html bypass: not get method . $_SERVER[ REQUEST_METHOD ] ) return it just bypasses POST at all , so following if ( ! $is_html ) Debug2::debug( [Core] Footer check failed: . ob_get_level() . - . substr( $buffer, 0, 100 ) ) return Debug2::debug( [Core] Footer check passed ) if ( ! defined( LITESPEED_IS_HTML ) ) define( LITESPEED_IS_HTML, true ) is_html will be false , and define( LITESPEED_IS_HTML, true ) wont happen , so it doesnt optimize. It seems LSCWP was not designed to check POST output at all. Maybe you could try define( LITESPEED_IS_HTML, true ) on your POST to force LSCWP does optimize. Best regards, Hello qtwrk, how cool is that? That worked!Thank you VERY much! Best regards, Chris
LiteCache Rush: Speed comes from using less, not from doing it faster
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