HTTP requests in keepalive session #563
Description
Tinyproxy version
1.11.2
Issue
My service call http (without TLS) url via tinyproxy instance and send several requests via single TCP connection.
Here is dump of TCP session from my service to tinyproxy:
* TCP connection to proxy-svc-18.service.lan:80 established
< POST http://1.2.3.4:8080/webhook HTTP/1.1
< Content-Length: 121
< Host: 1.2.3.4:8080
< Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
< Content-Type: application/x-www-form-urlencoded
< User-Agent: WebhookSender/1.7.2
<
< post payload
> HTTP/1.1 200 OK
> Date: Sat, 30 Nov 2024 10:08:12 GMT
> Server: nginx
> Content-Length: 0
> Content-Type: text/html; charset=UTF-8
< POST http://1.2.3.4:8080/webhook HTTP/1.1
< Content-Length: 176
< Host: 1.2.3.4:8080
< Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
< Content-Type: application/x-www-form-urlencoded
< User-Agent: WebhookSender/1.7.2
<
< post payload 2
* No HTTP response on second request.
* TCP connection closed from remote site
Here is dump of TCP session from tinyproxy to remote destination:
* TCP connection to 1.2.3.4:8080 established
< POST /webhook HTTP/1.1
< Host: 1.2.3.4:8080
< Connection: close
< Content-Length: 121
< Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
< Content-Type: application/x-www-form-urlencoded
< User-Agent: WebhookSender/1.7.2
<
< post payload
> HTTP/1.1 200 OK
> Date: Sat, 30 Nov 2024 10:08:12 GMT
> Server: nginx
> Content-Length: 0
> Connection: close
> Content-Type: text/html; charset=UTF-8
< POST http://1.2.3.4:8080/webhook HTTP/1.1
< Content-Length: 176
< Host: 1.2.3.4:8080
< Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
< Content-Type: application/x-www-form-urlencoded
< User-Agent: WebhookSender/1.7.2
<
< post payload 2
* No HTTP response on second request.
* TCP connection closed from remote site.
Several questions here:
- Why tinyproxy adds
Connection: closeheader? - Why tinyproxy forward response from remote endpoint to my service with
Connection: closestripped? - Why tinyproxy ignores its own
Connection: closedirective and doesn't close any connection? - Why tinyproxy send first request correctly, but second request send to remote endpoint as it received from my service:
POST http://1.2.3.4:8080/webhook HTTP/1.1?