diff --git a/trunk/auto/depends.sh b/trunk/auto/depends.sh
index 3fc86b0b0..227fc901d 100755
--- a/trunk/auto/depends.sh
+++ b/trunk/auto/depends.sh
@@ -549,22 +549,22 @@ fi
 #####################################################################################
 # cherrypy for http hooks callback, CherryPy-3.2.4
 #####################################################################################
-if [[ -f ${SRS_OBJS}/CherryPy-3.2.4/setup.py ]]; then
-    echo "CherryPy-3.2.4 is ok.";
-else
-    require_sudoer "install CherryPy-3.2.4"
-    echo "Installing CherryPy-3.2.4";
-    (
-        sudo rm -rf ${SRS_OBJS}/CherryPy-3.2.4 && cd ${SRS_OBJS} && 
-        unzip -q ../3rdparty/CherryPy-3.2.4.zip && cd CherryPy-3.2.4 && 
-        sudo python setup.py install
-    )
-fi
-# check status
-ret=$?; if [[ $ret -ne 0 ]]; then echo "build CherryPy-3.2.4 failed, ret=$ret"; exit $ret; fi
-if [ ! -f ${SRS_OBJS}/CherryPy-3.2.4/setup.py ]; then echo "build CherryPy-3.2.4 failed."; exit -1; fi
-
 if [ $SRS_EXPORT_LIBRTMP_PROJECT = NO ]; then
+    if [[ -f ${SRS_OBJS}/CherryPy-3.2.4/setup.py ]]; then
+        echo "CherryPy-3.2.4 is ok.";
+    else
+        require_sudoer "install CherryPy-3.2.4"
+        echo "Installing CherryPy-3.2.4";
+        (
+            sudo rm -rf ${SRS_OBJS}/CherryPy-3.2.4 && cd ${SRS_OBJS} && 
+            unzip -q ../3rdparty/CherryPy-3.2.4.zip && cd CherryPy-3.2.4 && 
+            sudo python setup.py install
+        )
+    fi
+    # check status
+    ret=$?; if [[ $ret -ne 0 ]]; then echo "build CherryPy-3.2.4 failed, ret=$ret"; exit $ret; fi
+    if [ ! -f ${SRS_OBJS}/CherryPy-3.2.4/setup.py ]; then echo "build CherryPy-3.2.4 failed."; exit -1; fi
+
     echo "Link players to cherrypy static-dir"
     rm -rf research/api-server/static-dir/players &&
     ln -sf `pwd`/research/players research/api-server/static-dir/players &&
diff --git a/trunk/auto/generate-srs-librtmp-single.sh b/trunk/auto/generate-srs-librtmp-single.sh
index 149092050..34e7470f1 100755
--- a/trunk/auto/generate-srs-librtmp-single.sh
+++ b/trunk/auto/generate-srs-librtmp-single.sh
@@ -59,7 +59,7 @@ ret=$?; if [[ $ret -ne 0 ]]; then
     echo -e "${RED}failed to generate the srs_librtmp.cpp${BLACK}"
     exit $ret
 fi
-# module to cpp files.
+# module to hpp files.
 function build_module_hpp()
 {
     echo "build files ${SRS_LIBRTMP_OBJS} to $FILE"
diff --git a/trunk/configure b/trunk/configure
index 7c5282d61..7813835e6 100755
--- a/trunk/configure
+++ b/trunk/configure
@@ -154,9 +154,9 @@ MODULE_ID="KERNEL"
 MODULE_DEPENDS=("CORE") 
 ModuleLibIncs=(${SRS_OBJS_DIR})
 MODULE_FILES=("srs_kernel_error" "srs_kernel_log" "srs_kernel_buffer"
-        "srs_kernel_utility" "srs_kernel_flv" "srs_kernel_codec" "srs_kernel_file" 
+        "srs_kernel_utility" "srs_kernel_flv" "srs_kernel_codec" "srs_kernel_io"
         "srs_kernel_consts" "srs_kernel_aac" "srs_kernel_mp3" "srs_kernel_ts"
-        "srs_kernel_stream" "srs_kernel_balance" "srs_kernel_mp4" "srs_kernel_io")
+        "srs_kernel_stream" "srs_kernel_balance" "srs_kernel_mp4" "srs_kernel_file")
 KERNEL_INCS="src/kernel"; MODULE_DIR=${KERNEL_INCS} . auto/modules.sh
 KERNEL_OBJS="${MODULE_OBJS[@]}"
 #
diff --git a/trunk/src/libs/srs_librtmp.cpp b/trunk/src/libs/srs_librtmp.cpp
index ffe5618e8..2ac6972ca 100644
--- a/trunk/src/libs/srs_librtmp.cpp
+++ b/trunk/src/libs/srs_librtmp.cpp
@@ -72,6 +72,7 @@ struct Context
     std::string app;
     std::string stream;
     std::string param;
+    srs_url_schema schema;
 
     // extra request object for connect to server, NULL to ignore.
     SrsRequest* req;
@@ -122,6 +123,7 @@ struct Context
         h264_sps_changed = false;
         h264_pps_changed = false;
         rtimeout = stimeout = SRS_CONSTS_NO_TMMS;
+        schema = srs_url_schema_forbidden;
     }
     virtual ~Context() {
         srs_freep(req);
@@ -741,11 +743,22 @@ int srs_rtmp_connect_app(srs_rtmp_t rtmp)
     
     srs_assert(rtmp != NULL);
     Context* context = (Context*)rtmp;
-
-    string tcUrl = srs_generate_tc_url(
-            context->ip, context->vhost, context->app, context->port,
-            context->param
-        );
+    
+    string tcUrl;
+    switch(context->schema) {
+        case srs_url_schema_normal:
+            tcUrl=srs_generate_normal_tc_url(context->ip, context->vhost, context->app, context->port);
+            break;
+        case srs_url_schema_via:
+            tcUrl=srs_generate_via_tc_url(context->ip, context->vhost, context->app, context->port);
+            break;
+        case srs_url_schema_vis:
+        case srs_url_schema_vis2:
+            tcUrl=srs_generate_vis_tc_url(context->ip, context->vhost, context->app, context->port);
+            break;
+        default:
+            break;
+    }
     
     if ((ret = context->rtmp->connect_app(
         context->app, tcUrl, context->req, true)) != ERROR_SUCCESS) 
@@ -774,10 +787,21 @@ int srs_rtmp_connect_app2(srs_rtmp_t rtmp,
     srs_assert(rtmp != NULL);
     Context* context = (Context*)rtmp;
     
-    string tcUrl = srs_generate_tc_url(
-        context->ip, context->vhost, context->app, context->port,
-        context->param
-    );
+    string tcUrl;
+    switch(context->schema) {
+        case srs_url_schema_normal:
+            tcUrl=srs_generate_normal_tc_url(context->ip, context->vhost, context->app, context->port);
+            break;
+        case srs_url_schema_via:
+            tcUrl=srs_generate_via_tc_url(context->ip, context->vhost, context->app, context->port);
+            break;
+        case srs_url_schema_vis:
+        case srs_url_schema_vis2:
+            tcUrl=srs_generate_vis_tc_url(context->ip, context->vhost, context->app, context->port);
+            break;
+        default:
+            break;
+    }
     
     std::string sip, sserver, sprimary, sauthors, sversion;
     
@@ -795,34 +819,14 @@ int srs_rtmp_connect_app2(srs_rtmp_t rtmp,
     return ret;
 }
 
-int srs_rtmp_connect_app3(srs_rtmp_t rtmp, enum srs_url_schema sus)
+int srs_rtmp_set_schema(srs_rtmp_t rtmp, enum srs_url_schema schema)
 {
     int ret = ERROR_SUCCESS;
 
     srs_assert(rtmp != NULL);
     Context* context = (Context*)rtmp;
-
-    string tcUrl;
-    switch(sus) {
-        case srs_url_schema_normal:
-            tcUrl=srs_generate_normal_tc_url(context->ip, context->vhost, context->app, context->port);
-            break;
-        case srs_url_schema_via:
-            tcUrl=srs_generate_via_tc_url(context->ip, context->vhost, context->app, context->port);
-            break;
-        case srs_url_schema_vis:
-        case srs_url_schema_vis2:
-            tcUrl=srs_generate_vis_tc_url(context->ip, context->vhost, context->app, context->port);
-            break;
-        default:
-            break;
-    }
-
-    if ((ret = context->rtmp->connect_app(
-            context->app, tcUrl, context->req, true)) != ERROR_SUCCESS)
-    {
-        return ret;
-    }
+    
+    context->schema = schema;
 
     return ret;
 }
diff --git a/trunk/src/libs/srs_librtmp.hpp b/trunk/src/libs/srs_librtmp.hpp
index 9ea69509e..6e36ee648 100644
--- a/trunk/src/libs/srs_librtmp.hpp
+++ b/trunk/src/libs/srs_librtmp.hpp
@@ -79,10 +79,13 @@ extern "C"{
 *     srs_url_schema_vis   :    rtmp://ip:port/app/stream?vhost=xxx
 *     srs_url_schema_vis2  :    rtmp://ip:port/app/stream?domain=xxx
 */
-enum srs_url_schema{
+enum srs_url_schema
+{
+    // Forbidden.
+    srs_url_schema_forbidden = 0,
     // Normal RTMP URL, the vhost put in host field, using DNS to resolve the server ip.
     // For example, rtmp://vhost:port/app/stream
-    srs_url_schema_normal = 0,
+    srs_url_schema_normal,
     // VIA(vhost in app), the vhost put in app field.
     // For example, rtmp://ip:port/vhost/app/stream
     srs_url_schema_via,
@@ -225,16 +228,13 @@ extern int srs_rtmp_connect_app2(srs_rtmp_t rtmp,
     char srs_primary[128], char srs_authors[128], 
     char srs_version[32], int* srs_id, int* srs_pid
 );
-
+    
 /**
-* connect to rtmp vhost/app
-* category: publish/play
-* previous: handshake
-* next: publish or play
-*
-* @return 0, success; otherswise, failed.
-*/
-extern int srs_rtmp_connect_app3(srs_rtmp_t rtmp, enum srs_url_schema sus);
+ * Set the schema of URL when connect to server.
+ * @param schema, The schema of URL, @see srs_url_schema.
+ * @return 0, success; otherswise, failed.
+ */
+extern int srs_rtmp_set_schema(srs_rtmp_t rtmp, enum srs_url_schema schema);
 
 /**
 * play a live/vod stream.