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webrtc muxer: keep the WebSocket connection
The WebSocket connection is kept open in order to use it to notify shutdowns.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,4 +1,4 @@ | ||
| // Package rtmp implements a RTMP connection. | ||
| // Package rtmp provides RTMP connectivity. | ||
| package rtmp | ||
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| import ( | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| // Package websocket provides WebSocket connectivity. | ||
| package websocket | ||
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| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "net" | ||
| "net/http" | ||
| "time" | ||
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| "github.com/gorilla/websocket" | ||
| ) | ||
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| var ( | ||
| pingInterval = 30 * time.Second | ||
| pingTimeout = 5 * time.Second | ||
| writeTimeout = 2 * time.Second | ||
| ) | ||
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| var upgrader = websocket.Upgrader{ | ||
| CheckOrigin: func(r *http.Request) bool { | ||
| return true | ||
| }, | ||
| } | ||
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| // ServerConn is a server-side WebSocket connection with automatic, periodic ping / pong. | ||
| type ServerConn struct { | ||
| wc *websocket.Conn | ||
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| // in | ||
| terminate chan struct{} | ||
| write chan []byte | ||
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| // out | ||
| writeErr chan error | ||
| } | ||
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| // NewServerConn allocates a ServerConn. | ||
| func NewServerConn(w http.ResponseWriter, req *http.Request) (*ServerConn, error) { | ||
| wc, err := upgrader.Upgrade(w, req, nil) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
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| c := &ServerConn{ | ||
| wc: wc, | ||
| terminate: make(chan struct{}), | ||
| write: make(chan []byte), | ||
| writeErr: make(chan error), | ||
| } | ||
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| go c.run() | ||
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| return c, nil | ||
| } | ||
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| // Close closes a ServerConn. | ||
| func (c *ServerConn) Close() { | ||
| c.wc.Close() | ||
| close(c.terminate) | ||
| } | ||
|
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| // RemoteAddr returns the remote address. | ||
| func (c *ServerConn) RemoteAddr() net.Addr { | ||
| return c.wc.RemoteAddr() | ||
| } | ||
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| func (c *ServerConn) run() { | ||
| c.wc.SetReadDeadline(time.Now().Add(pingInterval + pingTimeout)) | ||
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| c.wc.SetPongHandler(func(string) error { | ||
| c.wc.SetReadDeadline(time.Now().Add(pingInterval + pingTimeout)) | ||
| return nil | ||
| }) | ||
|
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| pingTicker := time.NewTicker(pingInterval) | ||
| defer pingTicker.Stop() | ||
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| for { | ||
| select { | ||
| case byts := <-c.write: | ||
| c.wc.SetWriteDeadline(time.Now().Add(writeTimeout)) | ||
| err := c.wc.WriteMessage(websocket.TextMessage, byts) | ||
| c.writeErr <- err | ||
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| case <-pingTicker.C: | ||
| c.wc.SetWriteDeadline(time.Now().Add(writeTimeout)) | ||
| c.wc.WriteMessage(websocket.PingMessage, nil) | ||
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| case <-c.terminate: | ||
| return | ||
| } | ||
| } | ||
| } | ||
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| // ReadJSON reads a JSON object. | ||
| func (c *ServerConn) ReadJSON(in interface{}) error { | ||
| return c.wc.ReadJSON(in) | ||
| } | ||
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| // WriteJSON writes a JSON object. | ||
| func (c *ServerConn) WriteJSON(in interface{}) error { | ||
| byts, err := json.Marshal(in) | ||
| if err != nil { | ||
| return err | ||
| } | ||
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| select { | ||
| case c.write <- byts: | ||
| return <-c.writeErr | ||
| case <-c.terminate: | ||
| return fmt.Errorf("terminated") | ||
| } | ||
| } |
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