diff --git a/trunk/src/app/srs_app_conn.cpp b/trunk/src/app/srs_app_conn.cpp
index 8cedcfec3..3aa88fbdb 100644
--- a/trunk/src/app/srs_app_conn.cpp
+++ b/trunk/src/app/srs_app_conn.cpp
@@ -41,6 +41,7 @@ SrsConnection::SrsConnection(IConnectionManager* cm, st_netfd_t c)
     manager = cm;
     stfd = c;
     disposed = false;
+    expired = false;
     
     // the client thread should reap itself, 
     // so we never use joinable.
@@ -116,4 +117,9 @@ int SrsConnection::srs_id()
     return id;
 }
 
+void SrsConnection::expire()
+{
+    expired = true;
+}
+
 
diff --git a/trunk/src/app/srs_app_conn.hpp b/trunk/src/app/srs_app_conn.hpp
index d5130bf71..ae48421ba 100644
--- a/trunk/src/app/srs_app_conn.hpp
+++ b/trunk/src/app/srs_app_conn.hpp
@@ -88,6 +88,11 @@ protected:
      * when disposed, connection should stop cycle and cleanup itself.
      */
     bool disposed;
+    /**
+     * whether connection is expired, application definition.
+     * when expired, the connection must never be served and quit ASAP.
+     */
+    bool expired;
 public:
     SrsConnection(IConnectionManager* cm, st_netfd_t c);
     virtual ~SrsConnection();
@@ -125,6 +130,10 @@ public:
     * get the srs id which identify the client.
     */
     virtual int srs_id();
+    /**
+     * set connection to expired.
+     */
+    virtual void expire();
 protected:
     /**
     * for concrete connection to do the cycle.
diff --git a/trunk/src/app/srs_app_http_api.cpp b/trunk/src/app/srs_app_http_api.cpp
index fd9eb5449..46e862ab9 100755
--- a/trunk/src/app/srs_app_http_api.cpp
+++ b/trunk/src/app/srs_app_http_api.cpp
@@ -660,22 +660,8 @@ int SrsGoApiStreams::serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessage* r)
         srs_error("stream stream_id=%d not found. ret=%d", sid, ret);
         return srs_http_response_code(w, ret);
     }
-
-    if (r->is_http_delete()) {
-        srs_assert(stream);
-        
-        SrsSource* source = SrsSource::fetch(stream->vhost->vhost, stream->app, stream->stream);
-        if (!source) {
-            ret = ERROR_SOURCE_NOT_FOUND;
-            srs_warn("source not found for sid=%d", sid);
-            return srs_http_response_code(w, ret);
-        }
-        
-        source->set_expired();
-        srs_warn("disconnent stream=%d successfully. vhost=%s, app=%s, stream=%s.",
-            sid, stream->vhost->vhost.c_str(), stream->app.c_str(), stream->stream.c_str());
-        return srs_http_response_code(w, ret);
-    } else if (r->is_http_get()) {
+    
+    if (r->is_http_get()) {
         std::stringstream data;
         
         if (!stream) {
@@ -726,10 +712,15 @@ int SrsGoApiClients::serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessage* r)
         ret = ERROR_RTMP_STREAM_NOT_FOUND;
         srs_error("stream client_id=%d not found. ret=%d", cid, ret);
         return srs_http_response_code(w, ret);
-        
     }
     
-    if (r->is_http_get()) {
+    if (r->is_http_delete()) {
+        srs_assert(client);
+        
+        client->conn->expire();
+        srs_warn("delete client=%d ok", cid);
+        return srs_http_response_code(w, ret);
+    } else if (r->is_http_get()) {
         std::stringstream data;
         
         if (!client) {
@@ -751,6 +742,8 @@ int SrsGoApiClients::serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessage* r)
         }
         
         return srs_http_response_json(w, ss.str());
+    } else {
+        return srs_go_http_error(w, SRS_CONSTS_HTTP_MethodNotAllowed);
     }
 
     return ret;
diff --git a/trunk/src/app/srs_app_rtmp_conn.cpp b/trunk/src/app/srs_app_rtmp_conn.cpp
index e4651eecd..b4da91406 100755
--- a/trunk/src/app/srs_app_rtmp_conn.cpp
+++ b/trunk/src/app/srs_app_rtmp_conn.cpp
@@ -495,7 +495,7 @@ int SrsRtmpConn::stream_service_cycle()
     
     // update the statistic when source disconveried.
     SrsStatistic* stat = SrsStatistic::instance();
-    if ((ret = stat->on_client(_srs_context->get_id(), req)) != ERROR_SUCCESS) {
+    if ((ret = stat->on_client(_srs_context->get_id(), req, this, type)) != ERROR_SUCCESS) {
         srs_error("stat client failed. ret=%d", ret);
         return ret;
     }
@@ -671,6 +671,13 @@ int SrsRtmpConn::do_playing(SrsSource* source, SrsConsumer* consumer, SrsQueueRe
     while (!disposed) {
         // collect elapse for pithy print.
         pprint->elapse();
+        
+        // when source is set to expired, disconnect it.
+        if (expired) {
+            ret = ERROR_USER_DISCONNECT;
+            srs_error("connection expired. ret=%d", ret);
+            return ret;
+        }
 
         // to use isolate thread to recv, can improve about 33% performance.
         // @see: https://github.com/simple-rtmp-server/srs/issues/196
@@ -875,9 +882,9 @@ int SrsRtmpConn::do_publishing(SrsSource* source, SrsPublishRecvThread* trd)
         pprint->elapse();
         
         // when source is set to expired, disconnect it.
-        if (source->expired()) {
+        if (expired) {
             ret = ERROR_USER_DISCONNECT;
-            srs_error("source is expired. ret=%d", ret);
+            srs_error("connection expired. ret=%d", ret);
             return ret;
         }
 
diff --git a/trunk/src/app/srs_app_source.cpp b/trunk/src/app/srs_app_source.cpp
index f60f28887..ec00978cc 100755
--- a/trunk/src/app/srs_app_source.cpp
+++ b/trunk/src/app/srs_app_source.cpp
@@ -898,7 +898,6 @@ SrsSource::SrsSource()
     jitter_algorithm = SrsRtmpJitterAlgorithmOFF;
     mix_correct = false;
     mix_queue = new SrsMixQueue();
-    is_expired = false;
     
 #ifdef SRS_AUTO_HLS
     hls = new SrsHls();
@@ -2066,7 +2065,7 @@ int SrsSource::on_publish()
         return ret;
     }
     SrsStatistic* stat = SrsStatistic::instance();
-    stat->on_stream_publish(_req);
+    stat->on_stream_publish(_req, _source_id);
     return ret;
 }
 
@@ -2101,7 +2100,6 @@ void SrsSource::on_unpublish()
     
     _can_publish = true;
     _source_id = -1;
-    is_expired = false;
 
     // notify the handler.
     srs_assert(handler);
@@ -2260,13 +2258,3 @@ void SrsSource::destroy_forwarders()
     forwarders.clear();
 }
 
-bool SrsSource::expired()
-{
-    return is_expired;
-}
-
-void SrsSource::set_expired()
-{
-    is_expired = true;
-}
-
diff --git a/trunk/src/app/srs_app_source.hpp b/trunk/src/app/srs_app_source.hpp
index 18cdab86c..7c626b7eb 100755
--- a/trunk/src/app/srs_app_source.hpp
+++ b/trunk/src/app/srs_app_source.hpp
@@ -453,8 +453,6 @@ private:
     // whether use interlaced/mixed algorithm to correct timestamp.
     bool mix_correct;
     SrsMixQueue* mix_queue;
-    // the flag of source expired or not.
-    bool is_expired;
     // whether stream is monotonically increase.
     bool is_monotonically_increase;
     int64_t last_packet_time;
@@ -586,12 +584,6 @@ public:
 private:
     virtual int create_forwarders();
     virtual void destroy_forwarders();
-public:
-    virtual bool expired();
-    /**
-    * set source expired.
-    */
-    virtual void set_expired();
 };
 
 #endif
diff --git a/trunk/src/app/srs_app_statistic.cpp b/trunk/src/app/srs_app_statistic.cpp
index 6d7b459bb..2d375b067 100755
--- a/trunk/src/app/srs_app_statistic.cpp
+++ b/trunk/src/app/srs_app_statistic.cpp
@@ -72,8 +72,8 @@ int SrsStatisticVhost::dumps(stringstream& ss)
             << SRS_JFIELD_ORG("send_bytes", kbps->get_send_bytes()) << SRS_JFIELD_CONT
             << SRS_JFIELD_ORG("recv_bytes", kbps->get_recv_bytes()) << SRS_JFIELD_CONT
             << SRS_JFIELD_OBJ("kbps")
-                << SRS_JFIELD_ORG("r30s", kbps->get_recv_kbps_30s()) << SRS_JFIELD_CONT
-                << SRS_JFIELD_ORG("s30s", kbps->get_send_kbps_30s())
+                << SRS_JFIELD_ORG("recv_30s", kbps->get_recv_kbps_30s()) << SRS_JFIELD_CONT
+                << SRS_JFIELD_ORG("send_30s", kbps->get_send_kbps_30s())
             << SRS_JOBJECT_END << SRS_JFIELD_CONT
             << SRS_JFIELD_NAME("hls") << SRS_JOBJECT_START
                 << SRS_JFIELD_BOOL("enabled", hls_enabled);
@@ -91,7 +91,8 @@ SrsStatisticStream::SrsStatisticStream()
 {
     id = srs_generate_id();
     vhost = NULL;
-    status = STATISTIC_STREAM_STATUS_IDLING;
+    active = false;
+    connection_cid = -1;
     
     has_video = false;
     vcodec = SrsCodecVideoReserved;
@@ -124,15 +125,18 @@ int SrsStatisticStream::dumps(stringstream& ss)
             << SRS_JFIELD_STR("name", stream) << SRS_JFIELD_CONT
             << SRS_JFIELD_ORG("vhost", vhost->id) << SRS_JFIELD_CONT
             << SRS_JFIELD_STR("app", app) << SRS_JFIELD_CONT
+            << SRS_JFIELD_ORG("live_ms", srs_get_system_time_ms()) << SRS_JFIELD_CONT
             << SRS_JFIELD_ORG("clients", nb_clients) << SRS_JFIELD_CONT
             << SRS_JFIELD_ORG("send_bytes", kbps->get_send_bytes()) << SRS_JFIELD_CONT
             << SRS_JFIELD_ORG("recv_bytes", kbps->get_recv_bytes()) << SRS_JFIELD_CONT
             << SRS_JFIELD_OBJ("kbps")
-                << SRS_JFIELD_ORG("r30s", kbps->get_recv_kbps_30s()) << SRS_JFIELD_CONT
-                << SRS_JFIELD_ORG("s30s", kbps->get_send_kbps_30s())
+                << SRS_JFIELD_ORG("recv_30s", kbps->get_recv_kbps_30s()) << SRS_JFIELD_CONT
+                << SRS_JFIELD_ORG("send_30s", kbps->get_send_kbps_30s())
             << SRS_JOBJECT_END << SRS_JFIELD_CONT
-            << SRS_JFIELD_ORG("live_ms", srs_get_system_time_ms()) << SRS_JFIELD_CONT
-            << SRS_JFIELD_STR("status", status) << SRS_JFIELD_CONT;
+            << SRS_JFIELD_OBJ("publish")
+                << SRS_JFIELD_BOOL("active", active) << SRS_JFIELD_CONT
+                << SRS_JFIELD_ORG("cid", connection_cid)
+            << SRS_JOBJECT_END << SRS_JFIELD_CONT;
     
     if (!has_video) {
         ss  << SRS_JFIELD_NULL("video") << SRS_JFIELD_CONT;
@@ -161,21 +165,27 @@ int SrsStatisticStream::dumps(stringstream& ss)
     return ret;
 }
 
-void SrsStatisticStream::publish()
+void SrsStatisticStream::publish(int cid)
 {
-    status = STATISTIC_STREAM_STATUS_PUBLISHING;
+    connection_cid = cid;
+    active = true;
 }
 
 void SrsStatisticStream::close()
 {
     has_video = false;
     has_audio = false;
-    status = STATISTIC_STREAM_STATUS_IDLING;
+    active = false;
 }
 
 SrsStatisticClient::SrsStatisticClient()
 {
     id = 0;
+    stream = NULL;
+    conn = NULL;
+    req = NULL;
+    type = SrsRtmpConnUnknown;
+    create = srs_get_system_time_ms();
 }
 
 SrsStatisticClient::~SrsStatisticClient()
@@ -187,7 +197,17 @@ int SrsStatisticClient::dumps(stringstream& ss)
     int ret = ERROR_SUCCESS;
     
     ss << SRS_JOBJECT_START
-            << SRS_JFIELD_ORG("id", id)
+            << SRS_JFIELD_ORG("id", id) << SRS_JFIELD_CONT
+            << SRS_JFIELD_ORG("vhost", stream->vhost->id) << SRS_JFIELD_CONT
+            << SRS_JFIELD_ORG("stream", stream->id) << SRS_JFIELD_CONT
+            << SRS_JFIELD_STR("ip", req->ip) << SRS_JFIELD_CONT
+            << SRS_JFIELD_STR("pageUrl", req->pageUrl) << SRS_JFIELD_CONT
+            << SRS_JFIELD_STR("swfUrl", req->swfUrl) << SRS_JFIELD_CONT
+            << SRS_JFIELD_STR("tcUrl", req->tcUrl) << SRS_JFIELD_CONT
+            << SRS_JFIELD_STR("url", req->get_stream_url()) << SRS_JFIELD_CONT
+            << SRS_JFIELD_STR("type", srs_client_type_string(type)) << SRS_JFIELD_CONT
+            << SRS_JFIELD_BOOL("publish", srs_client_type_is_publish(type)) << SRS_JFIELD_CONT
+            << SRS_JFIELD_ORG("alive", srs_get_system_time_ms() - create)
         << SRS_JOBJECT_END;
     
     return ret;
@@ -301,12 +321,12 @@ int SrsStatistic::on_audio_info(SrsRequest* req,
     return ret;
 }
 
-void SrsStatistic::on_stream_publish(SrsRequest* req)
+void SrsStatistic::on_stream_publish(SrsRequest* req, int cid)
 {
     SrsStatisticVhost* vhost = create_vhost(req);
     SrsStatisticStream* stream = create_stream(vhost, req);
 
-    stream->publish();
+    stream->publish(cid);
 }
 
 void SrsStatistic::on_stream_close(SrsRequest* req)
@@ -317,7 +337,7 @@ void SrsStatistic::on_stream_close(SrsRequest* req)
     stream->close();
 }
 
-int SrsStatistic::on_client(int id, SrsRequest* req)
+int SrsStatistic::on_client(int id, SrsRequest* req, SrsConnection* conn, SrsRtmpConnType type)
 {
     int ret = ERROR_SUCCESS;
     
@@ -336,6 +356,9 @@ int SrsStatistic::on_client(int id, SrsRequest* req)
     }
     
     // got client.
+    client->conn = conn;
+    client->req = req;
+    client->type = type;
     stream->nb_clients++;
     vhost->nb_clients++;
 
@@ -458,7 +481,7 @@ int SrsStatistic::dumps_clients(stringstream& ss, int start, int count)
     
     ss << SRS_JARRAY_START;
     std::map<int, SrsStatisticClient*>::iterator it = clients.begin();
-    for (int i = 0; i < count && it != clients.end(); it++) {
+    for (int i = 0; i < start + count && it != clients.end(); it++, i++) {
         if (i < start) {
             continue;
         }
diff --git a/trunk/src/app/srs_app_statistic.hpp b/trunk/src/app/srs_app_statistic.hpp
index 9a8483245..9505ed497 100755
--- a/trunk/src/app/srs_app_statistic.hpp
+++ b/trunk/src/app/srs_app_statistic.hpp
@@ -34,9 +34,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <string>
 
 #include <srs_kernel_codec.hpp>
-
-#define STATISTIC_STREAM_STATUS_PUBLISHING    "publishing"
-#define STATISTIC_STREAM_STATUS_IDLING        "idling"
+#include <srs_rtmp_stack.hpp>
 
 class SrsKbps;
 class SrsRequest;
@@ -68,7 +66,8 @@ public:
     std::string app;
     std::string stream;
     std::string url;
-    std::string status;
+    bool active;
+    int connection_cid;
     int nb_clients;
 public:
     /**
@@ -103,7 +102,7 @@ public:
     /**
     * publish the stream.
     */
-    virtual void publish();
+    virtual void publish(int cid);
     /**
     * close the stream.
     */
@@ -114,7 +113,11 @@ struct SrsStatisticClient
 {
 public:
     SrsStatisticStream* stream;
+    SrsConnection* conn;
+    SrsRequest* req;
+    SrsRtmpConnType type;
     int id;
+    int64_t create;
 public:
     SrsStatisticClient();
     virtual ~SrsStatisticClient();
@@ -169,9 +172,11 @@ public:
         SrsAacObjectType aac_object
     );
     /**
-    * when publish stream.
-    */
-    virtual void on_stream_publish(SrsRequest* req);
+     * when publish stream.
+     * @param req the request object of publish connection.
+     * @param cid the cid of publish connection.
+     */
+    virtual void on_stream_publish(SrsRequest* req, int cid);
     /**
     * when close stream.
     */
@@ -181,8 +186,10 @@ public:
      * when got a client to publish/play stream,
      * @param id, the client srs id.
      * @param req, the client request object.
+     * @param conn, the physical absract connection object.
+     * @param type, the type of connection.
      */
-    virtual int on_client(int id, SrsRequest* req);
+    virtual int on_client(int id, SrsRequest* req, SrsConnection* conn, SrsRtmpConnType type);
     /**
      * client disconnect
      * @remark the on_disconnect always call, while the on_client is call when
diff --git a/trunk/src/kernel/srs_kernel_error.hpp b/trunk/src/kernel/srs_kernel_error.hpp
index 47c68c9b1..bb7fddcef 100755
--- a/trunk/src/kernel/srs_kernel_error.hpp
+++ b/trunk/src/kernel/srs_kernel_error.hpp
@@ -263,6 +263,11 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define ERROR_AAC_BYTES_INVALID             4028
 #define ERROR_HTTP_REQUEST_EOF              4029
 
+///////////////////////////////////////////////////////
+// HTTP API error.
+///////////////////////////////////////////////////////
+//#define ERROR_API_METHOD_NOT_ALLOWD
+
 ///////////////////////////////////////////////////////
 // user-define error.
 ///////////////////////////////////////////////////////
diff --git a/trunk/src/protocol/srs_http_stack.cpp b/trunk/src/protocol/srs_http_stack.cpp
index 75c55e5e3..8f767279b 100755
--- a/trunk/src/protocol/srs_http_stack.cpp
+++ b/trunk/src/protocol/srs_http_stack.cpp
@@ -120,8 +120,11 @@ string srs_go_http_detect(char* data, int size)
     return "application/octet-stream"; // fallback
 }
 
-// Error replies to the request with the specified error message and HTTP code.
-// The error message should be plain text.
+int srs_go_http_error(ISrsHttpResponseWriter* w, int code)
+{
+    return srs_go_http_error(w, code, srs_generate_http_status_text(code));
+}
+
 int srs_go_http_error(ISrsHttpResponseWriter* w, int code, string error)
 {
     int ret = ERROR_SUCCESS;
@@ -287,7 +290,7 @@ bool SrsHttpNotFoundHandler::is_not_found()
 
 int SrsHttpNotFoundHandler::serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessage* r)
 {
-    return srs_go_http_error(w, SRS_CONSTS_HTTP_NotFound, SRS_CONSTS_HTTP_NotFound_str);
+    return srs_go_http_error(w, SRS_CONSTS_HTTP_NotFound);
 }
 
 SrsHttpFileServer::SrsHttpFileServer(string root_dir)
diff --git a/trunk/src/protocol/srs_http_stack.hpp b/trunk/src/protocol/srs_http_stack.hpp
index 2888ce186..4e4fed7a2 100644
--- a/trunk/src/protocol/srs_http_stack.hpp
+++ b/trunk/src/protocol/srs_http_stack.hpp
@@ -76,6 +76,11 @@ class ISrsHttpResponseWriter;
 #define SRS_CONSTS_HTTP_PUT HTTP_PUT
 #define SRS_CONSTS_HTTP_DELETE HTTP_DELETE
 
+// Error replies to the request with the specified error message and HTTP code.
+// The error message should be plain text.
+extern int srs_go_http_error(ISrsHttpResponseWriter* w, int code);
+extern int srs_go_http_error(ISrsHttpResponseWriter* w, int code, std::string error);
+
 // helper function: response in json format.
 extern int srs_http_response_json(ISrsHttpResponseWriter* w, std::string data);
 /**
diff --git a/trunk/src/protocol/srs_rtmp_stack.cpp b/trunk/src/protocol/srs_rtmp_stack.cpp
index e7d15876d..277309a62 100644
--- a/trunk/src/protocol/srs_rtmp_stack.cpp
+++ b/trunk/src/protocol/srs_rtmp_stack.cpp
@@ -1747,12 +1747,17 @@ string srs_client_type_string(SrsRtmpConnType type)
 {
     switch (type) {
         case SrsRtmpConnPlay: return "Play";
-        case SrsRtmpConnFlashPublish: return "publish(FlashPublish)";
-        case SrsRtmpConnFMLEPublish: return "publish(FMLEPublish)";
+        case SrsRtmpConnFlashPublish: return "flash-publish)";
+        case SrsRtmpConnFMLEPublish: return "fmle-publish";
         default: return "Unknown";
     }
 }
 
+bool srs_client_type_is_publish(SrsRtmpConnType type)
+{
+    return type != SrsRtmpConnPlay;
+}
+
 SrsHandshakeBytes::SrsHandshakeBytes()
 {
     c0c1 = s0s1s2 = c2 = NULL;
diff --git a/trunk/src/protocol/srs_rtmp_stack.hpp b/trunk/src/protocol/srs_rtmp_stack.hpp
index f2c837fc8..ec50bf78a 100644
--- a/trunk/src/protocol/srs_rtmp_stack.hpp
+++ b/trunk/src/protocol/srs_rtmp_stack.hpp
@@ -622,6 +622,7 @@ enum SrsRtmpConnType
     SrsRtmpConnFlashPublish,
 };
 std::string srs_client_type_string(SrsRtmpConnType type);
+bool srs_client_type_is_publish(SrsRtmpConnType type);
 
 /**
  * store the handshake bytes,
diff --git a/trunk/src/protocol/srs_rtmp_utility.cpp b/trunk/src/protocol/srs_rtmp_utility.cpp
index 4d346ed0c..c28d5cf32 100644
--- a/trunk/src/protocol/srs_rtmp_utility.cpp
+++ b/trunk/src/protocol/srs_rtmp_utility.cpp
@@ -247,7 +247,7 @@ int srs_write_large_iovs(ISrsProtocolReaderWriter* skt, iovec* iovs, int size, s
     // for srs-librtmp, @see https://github.com/simple-rtmp-server/srs/issues/213
 #ifndef _WIN32
     // for linux, generally it's 1024.
-    static int limits = sysconf(_SC_IOV_MAX);
+    static int limits = (int)sysconf(_SC_IOV_MAX);
 #else
     static int limits = 1024;
 #endif