feat: HTTP/1.1 persistent connections (keep-alive)#53
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mgrossmann merged 2 commits intomainfrom Apr 9, 2026
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- New HTTPC fields: keepalive (0x53), request_count (0x54) - New HTTPD config: cfg_keepalive_timeout (default 5s), cfg_keepalive_max (default 100 requests) - Parmlib keywords: KEEPALIVE_TIMEOUT, KEEPALIVE_MAX - httpin.c: determine keepalive from request version and Connection header. HTTP/1.1 defaults to keep-alive, HTTP/1.0 defaults to close. Enforce max request limit. Keep-alive idle timeout goes to CSTATE_CLOSE (not RESET). - httpresp.c: send Connection: keep-alive or close based on httpc->keepalive flag - httprese.c: if keepalive, increment request_count, reset per-request state, set start time, transition to CSTATE_IN. Worker loop re-enters http_in for next request on same socket. - httpgets.c: use cfg_keepalive_timeout for idle wait between keep-alive requests (shorter than cfg_client_timeout) CGI modules (mvsMF) are unaffected — keepalive is transparent to the request processing pipeline. Fixes #52
Add the new keep-alive configuration keywords to the sample Parmlib member with their default values (5s timeout, 100 max requests per connection). Ref #52
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Summary
KEEPALIVE_TIMEOUT=5,KEEPALIVE_MAX=100Changed files
include/httpd.hkeepalive,request_count. New HTTPD config:cfg_keepalive_timeout,cfg_keepalive_maxinclude/httpcgi.hsrc/httpin.csrc/httpresp.cConnection: keep-aliveorConnection: closebased on flagsrc/httprese.csrc/httpgets.ccfg_keepalive_timeoutfor idle wait between keep-alive requestssrc/httpprm.csamplib/httpprm0Test results
curl -v --http1.1multiple requests →Connection: keep-aliveheadercurl -v --http1.0→Connection: close, no keep-aliveFixes #52