camera-streamer/html/webrtc.html at 4203f89df1596cc349b0260f26bf24a3c446a56b · ayufan/camera-streamer · GitHub

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<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title></title>
  <link rel="icon" href="data:;base64,iVBORw0KGgo=">
  <style>
    body {
      margin:0;
      padding:0;
      background-color:#303030;
    }

    #streamStage {
      position:fixed;
      top:0;
      left:0;
      width:100%;
      height:100%;
    }

    #streamStage:before {
      content: '';
      box-sizing: border-box;
      position: absolute;
      top: 50%;
      left: 50%;
      width: 2rem;
      height: 2rem;
      margin-top: -1rem;
      margin-left: -1rem;
    }

    #stream {
      max-height: 100%;
      max-width: 100%;
      margin: auto;
      position: absolute;
      top: 0; left: 0; bottom: 0; right: 0;
    }
  </style>
</head>
<body>
  <div id="streamtage">
    <video controls autoplay muted playsinline id="stream"></video>
  </div>

  <script>
    function startWebRTC() {
        const iceServers = [
          { urls: ['stun:stun.l.google.com:19302'] }
        ];

        var pc = null;

        const urlSearchParams = new URLSearchParams(window.location.search);
        const params = Object.fromEntries(urlSearchParams.entries());

        fetch(window.location.href, {
          body: JSON.stringify({
              type: 'request',
              res: params.res,
              iceServers: iceServers
          }),
          headers: {
              'Content-Type': 'application/json'
          },
          method: 'POST'
        }).then(function(response) {
          return response.json();
        }).then(function(request) {
          pc = new RTCPeerConnection({
            sdpSemantics: 'unified-plan',
            iceServers: request.iceServers
          });
          pc.remote_pc_id = request.id;
          pc.addTransceiver('video', { direction: 'recvonly' });
          pc.addEventListener('track', function(evt) {
            if (document.getElementById('stream'))
              document.getElementById('stream').srcObject = evt.streams[0];
          });
          pc.addEventListener("icecandidate", function(e) {
            if (e.candidate) {
              return fetch(window.location.href, {
                body: JSON.stringify({
                  type: 'remote_candidate',
                  id: pc.remote_pc_id,
                  candidates: [e.candidate]
                }),
                headers: { 'Content-Type': 'application/json' },
                method: 'POST'
              }).catch(function(e) {
                console.log("Failed to send ICE WebRTC: "+e);
              });
            }
          });

          return pc.setRemoteDescription(request);
        }).then(function() {
          return pc.createAnswer();
        }).then(function(answer) {
          return pc.setLocalDescription(answer);
        }).then(function() {
          var offer = pc.localDescription;

          return fetch(window.location.href, {
            body: JSON.stringify({
              type: offer.type,
              id: pc.remote_pc_id,
              sdp: offer.sdp,
            }),
            headers: { 'Content-Type': 'application/json' },
            method: 'POST'
          })
        }).then(function(response) {
          return response.json();
        }).catch(function(e) {
          console.log(e);
        });
    }

    function stopWebRTC() {
      setTimeout(function() {
        pc.close();
      }, 500);
    }
  </script>

  <script>
    window.onload = function() {
      startWebRTC();
    }
  </script>
</body>
</html>