add conf directive forward_append_stream_name,to support add ?vhost=xxxx to stre…

…am name when forward to cdn

-# the config for srs to forward
+# the cwrd_stream_name_appendnfig for srs to forward
 # @see https://github.com/ossrs/srs/wiki/v1_CN_SampleForward
 # @see full.conf for detail config.
 
@@ -16,4 +16,6 @@ vhost __defaultVhost__ {
 #if the forward server is same as this server , a origin,try use forward_peer,
 #the stream pushed from other forward peer will not forward any more in this server
     forward_peer 127.0.0.1:1936;
+#append the string after start with ? to the stream name when forward to the server
+    forward_append_stream_name 127.0.0.1:19350?vhost=newrtmp.xuedianyun.com
 }

@@ -1832,7 +1832,8 @@ int SrsConfig::check_config()
                 && n != "dvr" && n != "ingest" && n != "hls" && n != "http_hooks"
                 && n != "gop_cache" && n != "queue_length"
                 && n != "refer" && n != "refer_publish" && n != "refer_play"
-                && n != "forward" && n != "forward_server_other" && n != "forward_in_turn" && n != "forward_peer" && n != "transcode" && n != "bandcheck"
+                && n != "forward" && n != "transcode" && n != "bandcheck"
+                && n != "forward_server_other" && n != "forward_in_turn" && n != "forward_peer"  && n != "forward_append_stream_name"
                 && n != "time_jitter" && n != "mix_correct"
                 && n != "atc" && n != "atc_auto"
                 && n != "debug_srs_upnode"
@@ -2816,6 +2817,17 @@ SrsConfDirective* SrsConfig::get_forward_in_turn(string vhost)
     return conf->get("forward_in_turn");
 }
 
+SrsConfDirective* SrsConfig::get_forward_append_stream_name(string vhost)
+{
+    SrsConfDirective* conf = get_vhost(vhost);
+
+    if (!conf) {
+        return NULL;
+    }
+
+    return conf->get("forward_append_stream_name");
+}
+
 SrsConfDirective* SrsConfig::get_forward_peer(string vhost)
 {
     SrsConfDirective* conf = get_vhost(vhost);

@@ -581,6 +581,10 @@ public:
     * get the forward_peer directive of vhost.
     */
     virtual SrsConfDirective*   get_forward_peer(std::string vhost);
+    /**
+    * get the forward_append_stream_name directive of vhost.
+    */
+    virtual SrsConfDirective*   get_forward_append_stream_name(std::string vhost);
 // http_hooks section
 private:
     /**

@@ -138,6 +138,16 @@ int SrsForwarder::initialize(SrsRequest* req, string ep_forward)
         }
     }
 
+    size_t ep_len = ep_forward.length();
+    conf = _srs_config->get_forward_append_stream_name(_req->vhost);
+    for (int i = 0; conf && i < (int)conf->args.size(); i++) {
+        std::string forward_append_stream_name = conf->args.at(i);
+        if(forward_append_stream_name.length() > ep_len && forward_append_stream_name.at(ep_len)=='?' && !strncmp(ep_forward.c_str(),forward_append_stream_name.c_str(),ep_len)){
+            _steam_name_appender = forward_append_stream_name.substr(ep_len, forward_append_stream_name.length());
+        	break;
+        }
+    }
+
     return ret;
 }
 
@@ -300,7 +310,7 @@ int SrsForwarder::cycle()
         return ret;
     }
     
-    if ((ret = client->publish(_req->stream, stream_id)) != ERROR_SUCCESS) {
+    if ((ret = client->publish(_req->stream + _steam_name_appender, stream_id)) != ERROR_SUCCESS) {
         srs_error("connect with server failed, stream_name=%s, stream_id=%d. ret=%d", 
             _req->stream.c_str(), stream_id, ret);
         return ret;

@@ -55,6 +55,8 @@ private:
     std::string _ep_forward;
     SrsRequest* _req;
     int stream_id;
+    // the string append to stream name ,such as "?vhost=newrtmp.xuedianyun.com" for rtmp://video-center.alivecdn.com/live/test?vhost=newrtmp.xuedianyun.com
+    std::string _steam_name_appender;
 private:
     st_netfd_t stfd;
     SrsReusableThread2* pthread;