dunkiegaming.github.io/calltest.html at master · DunkieGaming/dunkiegaming.github.io · GitHub

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<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <!-- This adapter normalizes cross-browser differences in WebRTC APIs. Currently necessary in order to support Firefox. -->
    <script
      src="https://cdnjs.cloudflare.com/ajax/libs/webrtc-adapter/8.1.2/adapter.min.js"
      integrity="sha512-l40eBFtXx+ve5RryIELC3y6/OM6Nu89mLGQd7fg1C93tN6XrkC3supb+/YiD/Y+B8P37kdJjtG1MT1kOO2VzxA=="
      crossorigin="anonymous"
      referrerpolicy="no-referrer"
    ></script>
  </head>


  <body>
    <div class="grid">
      <h1>Calls Echo Demo</h1>
      <div>
        <h2>Local stream</h2>
        <video id="local-video" autoplay muted></video>
      </div>
      <div>
        <h2>Remote echo stream</h2>
        <video id="remote-video" autoplay></video>
      </div>
    </div>


    <script type="module">
      // This is a class the defines the Calls API interactions.
      // It's not an SDK but a example of how Calls API can be used.


      // This is the App Id provided by the dashboard that identifies this Calls Application.
      const appId = 'a61a0375df17de53ca304f756d056d6a';
      // DO NOT USE YOUR SECRET IN THE BROWSER FOR PRODUCTION. It should be kept and used server-side.
      const appSecret = 'bc7fc97ad6b7f028863d52417ed38127ca7e0bfc49fbfb22a6af066b6c334676';


      class CallsApp {
        constructor(appId, basePath = 'https://rtc.live.cloudflare.com/v1') {
          this.prefixPath = `${basePath}/apps/${appId}`;
        }


        async sendRequest(url, body, method = 'POST') {
          const request = {
            method: method,
            mode: 'cors',
            headers: {
              'content-type': 'application/json',
              Authorization: `Bearer ${appSecret}`
            },
            body: JSON.stringify(body)
          };
          const response = await fetch(url, request);
          const result = await response.json();
          return result;
        }


        checkErrors(result, tracksCount = 0) {
          if (result.errorCode) {
            throw new Error(result.errorDescription);
          }
          for (let i = 0; i < tracksCount; i++) {
            if (result.tracks[i].errorCode) {
              throw new Error(
                `tracks[${i}]: ${result.tracks[i].errorDescription}`
              );
            }
          }
        }


        // newSession sends the initial offer and creates a session
        async newSession(offerSDP) {
          const url = `${this.prefixPath}/sessions/new`;
          const body = {
            sessionDescription: {
              type: 'offer',
              sdp: offerSDP
            }
          };
          const result = await this.sendRequest(url, body);
          this.checkErrors(result);
          this.sessionId = result.sessionId;
          return result;
        }


        // newTracks shares local tracks or gets tracks
        async newTracks(trackObjects, offerSDP = null) {
          const url = `${this.prefixPath}/sessions/${this.sessionId}/tracks/new`;
          const body = {
            sessionDescription: {
              type: 'offer',
              sdp: offerSDP
            },
            tracks: trackObjects
          };
          if (!offerSDP) {
            delete body['sessionDescription'];
          }
          const result = await this.sendRequest(url, body);
          this.checkErrors(result, trackObjects.length);
          return result;
        }


        // sendAnswerSDP sends an answer SDP if a renegotiation is required
        async sendAnswerSDP(answer) {
          const url = `${this.prefixPath}/sessions/${this.sessionId}/renegotiate`;
          const body = {
            sessionDescription: {
              type: 'answer',
              sdp: answer
            }
          };
          const result = await this.sendRequest(url, body, 'PUT');
          this.checkErrors(result);
        }
      }


      // Use Cloudflare's STUN server
      self.pc = new RTCPeerConnection({
        iceServers: [
          {
            urls: 'stun:stun.cloudflare.com:3478'
          }
        ],
        bundlePolicy: 'max-bundle'
      });


      // In order to successfully establish a peer connection, we need at least one track to publish.
      // In this case, we create two: video & audio
      const localStream = await navigator.mediaDevices.getUserMedia({
        video: true,
        audio: true
      });


      // Get the local video element in the HTML and set the source to show local stream
      const localVideoElement = document.getElementById('local-video');
      localVideoElement.srcObject = localStream;


      // Add sendonly trancievers to the PeerConnection
      self.transceivers = localStream.getTracks().map(track =>
        self.pc.addTransceiver(track, {
          direction: 'sendonly'
        })
      );


      // Create a instance of CallsApp (defined below). Please note that this is not an official SDK but just a demo showing the HTML API.
      self.app = new CallsApp(appId);


      // Send the first offer and create a session. The returned sessionId is required to retrieve any track published by this peer
      await self.pc.setLocalDescription(await self.pc.createOffer());
      const newSessionResult = await self.app.newSession(
        self.pc.localDescription.sdp
      );
      await self.pc.setRemoteDescription(
        new RTCSessionDescription(newSessionResult.sessionDescription)
      );


      // Make the peer connection was established
      await new Promise((resolve, reject) => {
        self.pc.addEventListener('iceconnectionstatechange', ev => {
          if (ev.target.iceConnectionState === 'connected') {
            resolve();
          }
          setTimeout(reject, 5000, 'connect timeout');
        });
      });


      // We associate a trackName to a transceiver identified by a mid (media ID). This way the track
      // is remotely reachable by the tuple (sessionId, trackName)
      let trackObjects = self.transceivers.map(transceiver => {
        return {
          location: 'local',
          mid: transceiver.mid,
          trackName: transceiver.sender.track.id
        };
      });


      // Get local description, create a new track, set remote description with the response
      await self.pc.setLocalDescription(await self.pc.createOffer());
      const newLocalTracksResult = await self.app.newTracks(
        trackObjects,
        self.pc.localDescription.sdp
      );
      await self.pc.setRemoteDescription(
        new RTCSessionDescription(newLocalTracksResult.sessionDescription)
      );


      // At this point in code, we are successfully sending local stream to Cloudflare Calls.
      // Now, we will pull the same stream from Cloudflare Calls.


      // Update trackObjects to reference the tracks as "remote"
      trackObjects = trackObjects.map(trackObject => {
        return {
          location: 'remote',
          sessionId: self.app.sessionId,
          trackName: trackObject.trackName
        };
      });


      // Prepare to receive the tracks before asking for them
      const remoteTracksPromise = new Promise(resolve => {
        let tracks = [];
        self.pc.ontrack = event => {
          tracks.push(event.track);
          console.debug(`Got track mid=${event.track.mid}`);
          if (tracks.length >= 2) {
            // remote video & audio are ready
            resolve(tracks);
          }
        };
      });


      // Calls API request to ask for the tracks
      const newRemoteTracksResult = await self.app.newTracks(trackObjects);
      if (newRemoteTracksResult.requiresImmediateRenegotiation) {
        switch (newRemoteTracksResult.sessionDescription.type) {
          case 'offer':
            // We let Cloudflare know we're ready to receive the tracks
            await self.pc.setRemoteDescription(
              new RTCSessionDescription(
                newRemoteTracksResult.sessionDescription
              )
            );
            await self.pc.setLocalDescription(await self.pc.createAnswer());
            await self.app.sendAnswerSDP(self.pc.localDescription.sdp);
            break;
          case 'answer':
            throw new Error('An offer SDP was expected');
        }
      }


      // Once started receiving the tracks (video & audio) send the data to the video tag
      const remoteTracks = await remoteTracksPromise;
      const remoteVideoElement = document.getElementById('remote-video');
      const remoteStream = new MediaStream();
      remoteStream.addTrack(remoteTracks[0]);
      remoteStream.addTrack(remoteTracks[1]);
      remoteVideoElement.srcObject = remoteStream;
    </script>
    <style>
      /* Styles are safe to ignore, just here for demo */


      html {
        color-scheme: light dark;
        font-family:
          system-ui,
          -apple-system,
          BlinkMacSystemFont,
          'Segoe UI',
          Roboto,
          Oxygen,
          Ubuntu,
          Cantarell,
          'Open Sans',
          'Helvetica Neue',
          sans-serif;
        background: white;
        color: black;
      }
      body,
      h1,
      h2 {
        margin: 0;
      }
      h1,
      h2 {
        font-weight: 400;
      }
      h1 {
        font-size: 1.5rem;
        grid-column: 1 / -1;
      }
      h2 {
        font-size: 1rem;
        margin-bottom: 0.5rem;
      }
      video {
        width: 100%;
      }
      .grid {
        display: grid;
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        gap: 1rem;
      }


      @media (max-width: 500px) {
        .grid {
          grid-template-columns: minmax(0, 1fr);
        }
      }
    </style>
  </body>
</html>