Add TURN support

The TURN server url can be set via environment variable VUE_APP_TURN_URL.

README.md

@@ -32,6 +32,10 @@ Sets the location to the palava signaling server. By default, it tries to reach
 
 The (required) [STUN server](https://en.wikipedia.org/wiki/STUN) to use, defaults to `stun: stun:stun.palava.tv`
 
+### `VUE_APP_STUN_URL`
+
+The (optional) [TURN server](https://en.wikipedia.org/wiki/TURN) to use.
+
 ### `BUILD_NOT_MINIFIED`
 
 When set, the production build will not be minified.

src/config.js

@@ -2,6 +2,7 @@ export default {
   env: {
     rtcUrl: process.env.VUE_APP_RTC_URL,
     stunUrl: process.env.VUE_APP_STUN_URL,
+    turnUrl: process.env.VUE_APP_TURN_URL,
   },
   defaultRtcUrl: 'ws://localhost:4233',
   defaultStunUrl: 'stun:stun.palava.tv',

src/views/Room.vue

@@ -55,12 +55,13 @@ export default {
     const roomId = this.$route.params.roomId
     this.catchInvalidRoomId(roomId)
     this.rtc = this.setupRtc(
-      new Session({
-        roomId,
+      sessionConfig = {
         webSocketAddress: config.env.rtcUrl || config.defaultRtcUrl,
         stun: config.env.stunUrl || config.defaultStunUrl,
         joinTimeout: config.defaultJoinTimeout,
-      })
+      }
+      if (config.env.turnUrl) { sessionConfig["turn"] = config.env.turnUrl }
+      new Session(roomId, sessionConfig)
     )
   },
   beforeDestroy() {