multiple nc request in keepalive fails to increase keepalive count

[tturbs]

Details

multiple nc request in keepalive fails to increase keepalive count.

Steps or code to reproduce the problem.

diff --git a/examples/test_proxy.c b/examples/test_proxy.c
index daba6e5..9a2c8ef 100644
--- a/examples/test_proxy.c
+++ b/examples/test_proxy.c
@@ -45,7 +45,8 @@ backend_cb(evhtp_request_t * backend_req, void * arg) {
     evhtp_request_t * frontend_req = (evhtp_request_t *)arg;

     evbuffer_prepend_buffer(frontend_req->buffer_out, backend_req->buffer_in);
-    evhtp_headers_add_headers(frontend_req->headers_out, backend_req->headers_in);
+    /* evhtp_headers_add_headers(frontend_req->headers_out, backend_req->headers_in); */
+

     /*
      * char body[1024] = { '\0' };
@@ -53,6 +54,7 @@ backend_cb(evhtp_request_t * backend_req, void * arg) {
      * printf("Backend %zu: %s\n", len, body);
      */

+    printf("yongk: %lu\n", frontend_req->conn->num_requests);
     evhtp_send_reply(frontend_req, EVHTP_RES_OK);
     evhtp_request_resume(frontend_req);
 }

build and run

$ gcc -I../include/ -I../build/include -pthread -lssl -lcrypto test_proxy.c -levent -levent_openssl -levent_pthreads ../build/libevhtp.a
$ ./a.out

reproduce

1. copy next to clipboard

GET / HTTP/1.1

GET / HTTP/1.1

GET / HTTP/1.1

GET / HTTP/1.1

2. Run nc and past it multiple times

$ nc -C localhost 8081

3. server print result

  Received frontend request on thread 8... Making backend request...
Ok.
Ok.
yongk: 0
  Received frontend request on thread 8... Making backend request...
Ok.
Ok.
yongk: 0
  Received frontend request on thread 8... Making backend request...
Ok.
Ok.
yongk: 0
  Received frontend request on thread 8... Making backend request...
Ok.
Ok.
yongk: 0
  Received frontend request on thread 8... Making backend request...
Ok.
Ok.
yongk: 1
  Received frontend request on thread 8... Making backend request...
Ok.
Ok.
yongk: 1
  Received frontend request on thread 8... Making backend request...
Ok.
Ok.
yongk: 1
  Received frontend request on thread 8... Making backend request...
Ok.
Ok.
yongk: 1
  Received frontend request on thread 8... Making backend request...
Ok.
Ok.
yongk: 2
  Received frontend request on thread 8... Making backend request...
Ok.
Ok.
yongk: 2
  Received frontend request on thread 8... Making backend request...
Ok.
Ok.
yongk: 2
  Received frontend request on thread 8... Making backend request...
Ok.
Ok.
yongk: 2
  Received frontend request on thread 8... Making backend request...
Ok.
Ok.

Example code (if applicable)

Version

tag: 1.2.18

[tturbs]

Here might cause this problem. Thanks.