STAT: Add server_id into http_hooks (#2692)

trunk/src/app/srs_app_http_hooks.cpp

@@ -45,10 +45,13 @@ srs_error_t SrsHttpHooks::on_connect(string url, SrsRequest* req)
     srs_error_t err = srs_success;
     
     SrsContextId cid = _srs_context->get_id();
+
+    SrsStatistic* stat = SrsStatistic::instance();
     
     SrsJsonObject* obj = SrsJsonAny::object();
     SrsAutoFree(SrsJsonObject, obj);
     
+    obj->set("server_id", SrsJsonAny::str(stat->server_id().c_str()));
     obj->set("action", SrsJsonAny::str("on_connect"));
     obj->set("client_id", SrsJsonAny::str(cid.c_str()));
     obj->set("ip", SrsJsonAny::str(req->ip.c_str()));