[core] replace con->response.keep_alive

set con->keep_alive = 0 to indicate backend request to close connection

src/base.h

@@ -50,8 +50,6 @@ typedef struct {
 
 typedef struct {
 	off_t   content_length;
-	int     keep_alive;               /* used by  the subrequests in proxy, cgi and fcgi to say the subrequest was keep-alive or not */
-
 	unsigned int htags; /* bitfield of flagged headers present in response */
 	array  *headers;
 	int send_chunked;

src/connections-glue.c

@@ -492,7 +492,6 @@ void connection_response_reset(server *srv, connection *con) {
 	con->is_writable = 1;
 	con->file_finished = 0;
 	con->file_started = 0;
-	con->response.keep_alive = 0;
 	if (con->physical.path) { /*(skip for mod_fastcgi authorizer)*/
 		buffer_clear(con->physical.doc_root);
 		buffer_reset(con->physical.path);

src/connections.c

@@ -422,22 +422,6 @@ static int connection_handle_write_prepare(server *srv, connection *con) {
 				con->keep_alive = 0;
 			}
 		}
-
-		/**
-		 * if the backend sent a Connection: close, follow the wish
-		 *
-		 * NOTE: if the backend sent Connection: Keep-Alive, but no Content-Length, we
-		 * will close the connection. That's fine. We can always decide the close 
-		 * the connection
-		 *
-		 * FIXME: to be nice we should remove the Connection: ... 
-		 */
-		if (con->response.htags & HTTP_HEADER_CONNECTION) {
-			/* a subrequest disable keep-alive although the client wanted it */
-			if (con->keep_alive && !con->response.keep_alive) {
-				con->keep_alive = 0;
-			}
-		}
 	}
 
 	if (con->request.http_method == HTTP_METHOD_HEAD) {
@@ -1200,7 +1184,6 @@ static int connection_handle_request(server *srv, connection *con) {
 								con->is_writable = 1;
 								con->file_finished = 0;
 								con->file_started = 0;
-								con->response.keep_alive = 0;
 
 								con->error_handler_saved_status = con->http_status;
 								con->error_handler_saved_method = con->request.http_method;

src/http-header-glue.c

@@ -988,8 +988,10 @@ static int http_response_process_headers(server *srv, connection *con, http_resp
             break;
           case HTTP_HEADER_CONNECTION:
             if (opts->backend == BACKEND_PROXY) continue;
-            con->response.keep_alive =
-              (0 == strcasecmp(value, "Keep-Alive")) ? 1 : 0;
+            /*(should parse for tokens and do case-insensitive match for "close"
+             * but this is an imperfect though simplistic attempt to honor
+             * backend request to close)*/
+            if (NULL != strstr(value, "lose")) con->keep_alive = 0;
             break;
           case HTTP_HEADER_CONTENT_LENGTH:
             con->response.content_length = strtoul(value, NULL, 10);