fix the hstrs bug on edge.

@@ -23,6 +23,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include <srs_app_http_stream.hpp>
 
+#define SRS_STREAM_CACHE_CYCLE_SECONDS 30
+
 #if defined(SRS_AUTO_HTTP_CORE)
 
 #include <sys/types.h>
@@ -107,6 +109,7 @@ int SrsStreamCache::cycle()
     
     // TODO: FIXME: support reload.
     if (fast_cache <= 0) {
+        st_sleep(SRS_STREAM_CACHE_CYCLE_SECONDS);
         return ret;
     }
     
@@ -1139,8 +1142,10 @@ int SrsHttpStreamServer::hijack(ISrsHttpMessage* request, ISrsHttpHandler** ph)
         }
         
         // hstrs not enabled, ignore.
-        // for origin: generally set hstrs to 'off' and mount while stream is pushed to origin.
-        // for edge: must set hstrs to 'on' so that it could trigger rtmp stream before mount.
+        // for origin, the http stream will be mount already when publish,
+        //      so it must never enter this line for stream already mounted.
+        // for edge, the http stream is trigger by hstrs and mount by it,
+        //      so we only hijack when only edge and hstrs is on.
         entry = it->second;
         if (!entry->hstrs) {
             return ret;
@@ -1177,14 +1182,20 @@ int SrsHttpStreamServer::hijack(ISrsHttpMessage* request, ISrsHttpHandler** ph)
     SrsAutoFree(SrsRequest, r);
 
     std::string sid = r->get_stream_url();
-    // check if the stream is enabled.
+    // check whether the http remux is enabled,
+    // for example, user disable the http flv then reload.
     if (sflvs.find(sid) != sflvs.end()) {
         SrsLiveEntry* s_entry = sflvs[sid];
         if (!s_entry->stream->entry->enabled) {
+            // only when the http entry is disabled, check the config whether http flv disable,
+            // for the http flv edge use hijack to trigger the edge ingester, we always mount it
+            // eventhough the origin does not exists the specified stream.
+            if (!_srs_config->get_vhost_http_remux_enabled(r->vhost)) {
                 srs_error("stream is disabled, hijack failed. ret=%d", ret);
                 return ret;
             }
         }
+    }
 
     SrsSource* s = SrsSource::fetch(r);
     if (!s) {