コード例 #1
0
ファイル: dms.go プロジェクト: ronindev/dms
func (server *Server) contentDirectoryEventSubHandler(w http.ResponseWriter, r *http.Request) {
	if server.StallEventSubscribe {
		// I have an LG TV that doesn't like my eventing implementation.
		// Returning unimplemented (501?) errors, results in repeat subscribe
		// attempts which hits some kind of error count limit on the TV
		// causing it to forcefully disconnect. It also won't work if the CDS
		// service doesn't include an EventSubURL. The best thing I can do is
		// cause every attempt to subscribe to timeout on the TV end, which
		// reduces the error rate enough that the TV continues to operate
		// without eventing.
		//
		// I've not found a reliable way to identify this TV, since it and
		// others don't seem to include any client-identifying headers on
		// SUBSCRIBE requests.
		//
		// TODO: Get eventing to work with the problematic TV.
		t := time.Now()
		<-w.(http.CloseNotifier).CloseNotify()
		eventingLogger.Printf("stalled subscribe connection went away after %s", time.Since(t))
		return
	}
	// The following code is a work in progress. It partially implements
	// the spec on eventing but hasn't been completed as I have nothing to
	// test it with.
	eventingLogger.Print(r.Header)
	service := server.services["ContentDirectory"]
	eventingLogger.Println(r.RemoteAddr, r.Method, r.Header.Get("SID"))
	if r.Method == "SUBSCRIBE" && r.Header.Get("SID") == "" {
		urls := upnp.ParseCallbackURLs(r.Header.Get("CALLBACK"))
		eventingLogger.Println(urls)
		var timeout int
		fmt.Sscanf(r.Header.Get("TIMEOUT"), "Second-%d", &timeout)
		eventingLogger.Println(timeout, r.Header.Get("TIMEOUT"))
		sid, timeout, _ := service.Subscribe(urls, timeout)
		w.Header()["SID"] = []string{sid}
		w.Header()["TIMEOUT"] = []string{fmt.Sprintf("Second-%d", timeout)}
		// TODO: Shouldn't have to do this to get headers logged.
		w.WriteHeader(http.StatusOK)
		go func() {
			time.Sleep(100 * time.Millisecond)
			server.contentDirectoryInitialEvent(urls, sid)
		}()
	} else if r.Method == "SUBSCRIBE" {
		http.Error(w, "meh", http.StatusPreconditionFailed)
	} else {
		eventingLogger.Printf("unhandled event method: %s", r.Method)
	}
}
コード例 #2
0
ファイル: dms.go プロジェクト: postfix/dms
func (server *Server) contentDirectoryEventSubHandler(w http.ResponseWriter, r *http.Request) {
	if r.UserAgent() == "" && true {
		// This should block forever. Clearly it's a minor resource leak,
		// since the underlying transport should expire eventually. I have
		// an (LG?) TV that doesn't provide a User-Agent in this request
		// that will refuse to operate correctly with any eventing I've
		// implemented. Returning unimplemented (501?) errors, results in
		// repeat subscribe attempts which hits some kind of error count
		// limit on the TV causing it to forcefully disconnect. It also
		// won't work if the CDS service doesn't include an EventSubURL.
		// The best thing I can do is cause every attempt to subscribe to
		// timeout on the TV end, which reduces the error rate enough that
		// the TV continues to operate without eventing.
		//
		// TODO: Stall the underlying connection until it drops without
		// stalling the entire goroutine indefinitely, get eventing to
		// work with the problematic TV.
		timeoutSocketBelt.Ride()
		return
	}
	// The following code is a work in progress. It partially implements
	// the spec on eventing but hasn't been completed as I have nothing to
	// test it with.
	log.Print(r.Header)
	service := server.services["ContentDirectory"]
	log.Println(r.RemoteAddr, r.Method, r.Header.Get("SID"))
	if r.Method == "SUBSCRIBE" && r.Header.Get("SID") == "" {
		urls := upnp.ParseCallbackURLs(r.Header.Get("CALLBACK"))
		log.Println(urls)
		var timeout int
		fmt.Sscanf(r.Header.Get("TIMEOUT"), "Second-%d", &timeout)
		log.Println(timeout, r.Header.Get("TIMEOUT"))
		sid, timeout, _ := service.Subscribe(urls, timeout)
		w.Header()["SID"] = []string{sid}
		w.Header()["TIMEOUT"] = []string{fmt.Sprintf("Second-%d", timeout)}
		// TODO: Shouldn't have to do this to get headers logged.
		w.WriteHeader(http.StatusOK)
		go func() {
			time.Sleep(100 * time.Millisecond)
			server.contentDirectoryInitialEvent(urls, sid)
		}()
	} else if r.Method == "SUBSCRIBE" {
		http.Error(w, "meh", http.StatusPreconditionFailed)
	} else {
		log.Print("unhandled event")
	}
}