diff --git a/trunk/src/app/srs_app_kbps.cpp b/trunk/src/app/srs_app_kbps.cpp
index c7fd53e0b..39e3fd149 100644
--- a/trunk/src/app/srs_app_kbps.cpp
+++ b/trunk/src/app/srs_app_kbps.cpp
@@ -77,22 +77,22 @@ void SrsKbpsSlice::sample()
     }
     
     if (now - sample_30s.time > 30 * 1000) {
-        sample_30s.kbps = (total_bytes - sample_30s.bytes) * 8 / (now - sample_30s.time);
+        sample_30s.kbps = (int)((total_bytes - sample_30s.bytes) * 8 / (now - sample_30s.time));
         sample_30s.time = now;
         sample_30s.bytes = total_bytes;
     }
     if (now - sample_1m.time > 60 * 1000) {
-        sample_1m.kbps = (total_bytes - sample_1m.bytes) * 8 / (now - sample_1m.time);
+        sample_1m.kbps = (int)((total_bytes - sample_1m.bytes) * 8 / (now - sample_1m.time));
         sample_1m.time = now;
         sample_1m.bytes = total_bytes;
     }
     if (now - sample_5m.time > 300 * 1000) {
-        sample_5m.kbps = (total_bytes - sample_5m.bytes) * 8 / (now - sample_5m.time);
+        sample_5m.kbps = (int)((total_bytes - sample_5m.bytes) * 8 / (now - sample_5m.time));
         sample_5m.time = now;
         sample_5m.bytes = total_bytes;
     }
     if (now - sample_60m.time > 3600 * 1000) {
-        sample_60m.kbps = (total_bytes - sample_60m.bytes) * 8 / (now - sample_60m.time);
+        sample_60m.kbps = (int)((total_bytes - sample_60m.bytes) * 8 / (now - sample_60m.time));
         sample_60m.time = now;
         sample_60m.bytes = total_bytes;
     }
@@ -160,7 +160,7 @@ int SrsKbps::get_send_kbps()
         return 0;
     }
     int64_t bytes = get_send_bytes();
-    return bytes * 8 / duration;
+    return (int)(bytes * 8 / duration);
 }
 
 int SrsKbps::get_recv_kbps()
@@ -170,7 +170,7 @@ int SrsKbps::get_recv_kbps()
         return 0;
     }
     int64_t bytes = get_recv_bytes();
-    return bytes * 8 / duration;
+    return (int)(bytes * 8 / duration);
 }
 
 int SrsKbps::get_send_kbps_30s()
diff --git a/trunk/src/app/srs_app_listener.cpp b/trunk/src/app/srs_app_listener.cpp
index fb370d708..915c95c23 100644
--- a/trunk/src/app/srs_app_listener.cpp
+++ b/trunk/src/app/srs_app_listener.cpp
@@ -54,6 +54,11 @@ ISrsUdpHandler::~ISrsUdpHandler()
 {
 }
 
+int ISrsUdpHandler::on_stfd_change(st_netfd_t /*fd*/)
+{
+    return ERROR_SUCCESS;
+}
+
 ISrsTcpHandler::ISrsTcpHandler()
 {
 }
@@ -69,7 +74,7 @@ SrsUdpListener::SrsUdpListener(ISrsUdpHandler* h, string i, int p)
     port = p;
 
     _fd = -1;
-    stfd = NULL;
+    _stfd = NULL;
 
     nb_buf = SRS_UDP_MAX_PACKET_SIZE;
     buf = new char[nb_buf];
@@ -80,7 +85,7 @@ SrsUdpListener::SrsUdpListener(ISrsUdpHandler* h, string i, int p)
 SrsUdpListener::~SrsUdpListener()
 {
     // close the stfd to trigger thread to interrupted.
-    srs_close_stfd(stfd);
+    srs_close_stfd(_stfd);
 
     pthread->stop();
     srs_freep(pthread);
@@ -97,6 +102,11 @@ int SrsUdpListener::fd()
     return _fd;
 }
 
+st_netfd_t SrsUdpListener::stfd()
+{
+    return _stfd;
+}
+
 int SrsUdpListener::listen()
 {
     int ret = ERROR_SUCCESS;
@@ -127,7 +137,7 @@ int SrsUdpListener::listen()
     }
     srs_verbose("bind socket success. ep=%s:%d, fd=%d", ip.c_str(), port, _fd);
     
-    if ((stfd = st_netfd_open_socket(_fd)) == NULL){
+    if ((_stfd = st_netfd_open_socket(_fd)) == NULL){
         ret = ERROR_ST_OPEN_SOCKET;
         srs_error("st_netfd_open_socket open socket failed. ep=%s:%d, ret=%d", ip.c_str(), port, ret);
         return ret;
@@ -153,7 +163,7 @@ int SrsUdpListener::cycle()
         int nb_from = sizeof(sockaddr_in);
         int nread = 0;
 
-        if ((nread = st_recvfrom(stfd, buf, nb_buf, (sockaddr*)&from, &nb_from, ST_UTIME_NO_TIMEOUT)) <= 0) {
+        if ((nread = st_recvfrom(_stfd, buf, nb_buf, (sockaddr*)&from, &nb_from, ST_UTIME_NO_TIMEOUT)) <= 0) {
             srs_warn("ignore recv udp packet failed, nread=%d", nread);
             continue;
         }
@@ -178,7 +188,7 @@ SrsTcpListener::SrsTcpListener(ISrsTcpHandler* h, string i, int p)
     port = p;
 
     _fd = -1;
-    stfd = NULL;
+    _stfd = NULL;
 
     pthread = new SrsThread("tcp", this, 0, true);
 }
@@ -186,7 +196,7 @@ SrsTcpListener::SrsTcpListener(ISrsTcpHandler* h, string i, int p)
 SrsTcpListener::~SrsTcpListener()
 {
     // close the stfd to trigger thread to interrupted.
-    srs_close_stfd(stfd);
+    srs_close_stfd(_stfd);
 
     pthread->stop();
     srs_freep(pthread);
@@ -238,7 +248,7 @@ int SrsTcpListener::listen()
     }
     srs_verbose("listen socket success. ep=%s:%d, fd=%d", ip.c_str(), port, _fd);
     
-    if ((stfd = st_netfd_open_socket(_fd)) == NULL){
+    if ((_stfd = st_netfd_open_socket(_fd)) == NULL){
         ret = ERROR_ST_OPEN_SOCKET;
         srs_error("st_netfd_open_socket open socket failed. ep=%s:%d, ret=%d", ip.c_str(), port, ret);
         return ret;
@@ -258,7 +268,7 @@ int SrsTcpListener::cycle()
 {
     int ret = ERROR_SUCCESS;
     
-    st_netfd_t client_stfd = st_accept(stfd, NULL, NULL, ST_UTIME_NO_TIMEOUT);
+    st_netfd_t client_stfd = st_accept(_stfd, NULL, NULL, ST_UTIME_NO_TIMEOUT);
     
     if(client_stfd == NULL){
         // ignore error.
diff --git a/trunk/src/app/srs_app_listener.hpp b/trunk/src/app/srs_app_listener.hpp
index 679bf1bda..371b5acba 100644
--- a/trunk/src/app/srs_app_listener.hpp
+++ b/trunk/src/app/srs_app_listener.hpp
@@ -45,6 +45,12 @@ class ISrsUdpHandler
 public:
     ISrsUdpHandler();
     virtual ~ISrsUdpHandler();
+public:
+    /**
+     * when fd changed, for instance, reload the listen port,
+     * notify the handler and user can do something.
+     */
+    virtual int on_stfd_change(st_netfd_t fd);
 public:
     /**
     * when udp listener got a udp packet, notice server to process it.
@@ -80,7 +86,7 @@ class SrsUdpListener : public ISrsThreadHandler
 {
 private:
     int _fd;
-    st_netfd_t stfd;
+    st_netfd_t _stfd;
     SrsThread* pthread;
 private:
     char* buf;
@@ -94,6 +100,7 @@ public:
     virtual ~SrsUdpListener();
 public:
     virtual int fd();
+    virtual st_netfd_t stfd();
 public:
     virtual int listen();
 // interface ISrsThreadHandler.
@@ -108,7 +115,7 @@ class SrsTcpListener : public ISrsThreadHandler
 {
 private:
     int _fd;
-    st_netfd_t stfd;
+    st_netfd_t _stfd;
     SrsThread* pthread;
 private:
     ISrsTcpHandler* handler;
diff --git a/trunk/src/app/srs_app_server.cpp b/trunk/src/app/srs_app_server.cpp
index d91b5101d..7e2c0809a 100644
--- a/trunk/src/app/srs_app_server.cpp
+++ b/trunk/src/app/srs_app_server.cpp
@@ -330,6 +330,12 @@ int SrsUdpStreamListener::listen(string i, int p)
     srs_info("listen thread cid=%d, current_cid=%d, "
         "listen at port=%d, type=%d, fd=%d started success, ep=%s:%d",
         pthread->cid(), _srs_context->get_id(), port, type, fd, ip.c_str(), port);
+    
+    // notify the handler the fd changed.
+    if ((ret = caster->on_stfd_change(listener->stfd())) != ERROR_SUCCESS) {
+        srs_error("notify handler fd changed. ret=%d", ret);
+        return ret;
+    }
 
     srs_trace("%s listen at udp://%s:%d, fd=%d", srs_listener_type2string(type).c_str(), ip.c_str(), port, listener->fd());
 
diff --git a/trunk/src/app/srs_app_source.cpp b/trunk/src/app/srs_app_source.cpp
index d4c4d7823..7e6dfafe3 100644
--- a/trunk/src/app/srs_app_source.cpp
+++ b/trunk/src/app/srs_app_source.cpp
@@ -45,6 +45,7 @@ using namespace std;
 #include <srs_app_hds.hpp>
 #include <srs_app_statistic.hpp>
 #include <srs_core_autofree.hpp>
+#include <srs_rtmp_utility.hpp>
 
 #define CONST_MAX_JITTER_MS         500
 #define DEFAULT_FRAME_TIME_MS         40
@@ -759,6 +760,20 @@ SrsSource* SrsSource::fetch(SrsRequest* r)
     return source;
 }
 
+SrsSource* SrsSource::fetch(std::string vhost, std::string app, std::string stream)
+{
+    SrsSource* source = NULL;
+	string stream_url = srs_generate_stream_url(vhost, app, stream);
+    
+    if (pool.find(stream_url) == pool.end()) {
+        return NULL;
+    }
+
+    source = pool[stream_url];
+
+    return source;
+}
+
 void SrsSource::destroy()
 {
     std::map<std::string, SrsSource*>::iterator it;
diff --git a/trunk/src/app/srs_app_source.hpp b/trunk/src/app/srs_app_source.hpp
index 4d4799f70..3c83e1163 100644
--- a/trunk/src/app/srs_app_source.hpp
+++ b/trunk/src/app/srs_app_source.hpp
@@ -407,6 +407,10 @@ public:
     */
     static SrsSource* fetch(SrsRequest* r);
     /**
+    * get the exists source by stream info(vhost, app, stream), NULL when not exists.
+    */
+    static SrsSource* fetch(std::string vhost, std::string app, std::string stream);
+    /**
     * when system exit, destroy the sources,
     * for gmc to analysis mem leaks.
     */
diff --git a/trunk/src/app/srs_app_statistic.cpp b/trunk/src/app/srs_app_statistic.cpp
index 59076db0f..275815917 100644
--- a/trunk/src/app/srs_app_statistic.cpp
+++ b/trunk/src/app/srs_app_statistic.cpp
@@ -195,6 +195,7 @@ int SrsStatistic::on_client(int id, SrsRequest* req)
     SrsStatisticClient* client = NULL;
     if (clients.find(id) == clients.end()) {
         client = new SrsStatisticClient();
+        client->id = id;
         client->stream = stream;
         clients[id] = client;
     } else {
diff --git a/trunk/src/kernel/srs_kernel_error.hpp b/trunk/src/kernel/srs_kernel_error.hpp
index bfcdad6b6..11f3e35b6 100644
--- a/trunk/src/kernel/srs_kernel_error.hpp
+++ b/trunk/src/kernel/srs_kernel_error.hpp
@@ -255,7 +255,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define ERROR_HTTP_INVALID_CHUNK_HEADER     4026
 #define ERROR_AVC_NALU_UEV                  4027
 #define ERROR_AAC_BYTES_INVALID             4028
-#define ERROR_HTTP_REQUEST_EOF             4029
+#define ERROR_HTTP_REQUEST_EOF              4029
 
 ///////////////////////////////////////////////////////
 // user-define error.
diff --git a/trunk/src/protocol/srs_rtmp_sdk.cpp b/trunk/src/protocol/srs_rtmp_sdk.cpp
index 3ee7ee9bd..ba5757340 100644
--- a/trunk/src/protocol/srs_rtmp_sdk.cpp
+++ b/trunk/src/protocol/srs_rtmp_sdk.cpp
@@ -99,15 +99,7 @@ void SrsRequest::update_auth(SrsRequest* req)
 
 string SrsRequest::get_stream_url()
 {
-    std::string url = "";
-    
-    url += vhost;
-    url += "/";
-    url += app;
-    url += "/";
-    url += stream;
-
-    return url;
+    return srs_generate_stream_url(vhost, app, stream);
 }
 
 void SrsRequest::strip()
diff --git a/trunk/src/protocol/srs_rtmp_utility.cpp b/trunk/src/protocol/srs_rtmp_utility.cpp
index bb1ed35ef..7c892ad36 100644
--- a/trunk/src/protocol/srs_rtmp_utility.cpp
+++ b/trunk/src/protocol/srs_rtmp_utility.cpp
@@ -31,6 +31,7 @@ using namespace std;
 #include <srs_kernel_stream.hpp>
 #include <srs_rtmp_stack.hpp>
 #include <srs_kernel_codec.hpp>
+#include <srs_kernel_consts.hpp>
 
 void srs_discovery_tc_url(
     string tcUrl, 
@@ -346,3 +347,18 @@ int srs_rtmp_create_msg(char type, u_int32_t timestamp, char* data, int size, in
     return ret;
 }
 
+std::string srs_generate_stream_url(std::string vhost, std::string app, std::string stream) 
+{
+    std::string url = "";
+    
+    if (SRS_CONSTS_RTMP_DEFAULT_VHOST != vhost){
+    	url += vhost;
+    }
+    url += "/";
+    url += app;
+    url += "/";
+    url += stream;
+
+    return url;
+}
+
diff --git a/trunk/src/protocol/srs_rtmp_utility.hpp b/trunk/src/protocol/srs_rtmp_utility.hpp
index afa02eaa8..09e834d09 100644
--- a/trunk/src/protocol/srs_rtmp_utility.hpp
+++ b/trunk/src/protocol/srs_rtmp_utility.hpp
@@ -120,5 +120,8 @@ extern int srs_chunk_header_c3(
 */
 extern int srs_rtmp_create_msg(char type, u_int32_t timestamp, char* data, int size, int stream_id, SrsSharedPtrMessage** ppmsg);
 
+// get the stream identify, vhost/app/stream.
+extern std::string srs_generate_stream_url(std::string vhost, std::string app, std::string stream);
+
 #endif