cast.html

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Copyright 2017 Google Inc. All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
    http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
 -->
<!--
This sample demonstrates how to build your own Receiver for use with Google
Cast.
 -->
<!DOCTYPE html>
<html>

<head>
    <link rel="shortcut icon" href="about:blank"></link>
    <script type="text/javascript" src="//www.gstatic.com/cast/sdk/libs/caf_receiver/v3/cast_receiver_framework.js"></script>
    <script src="//console.re/connector.js" data-channel="cx-chromecast-1234" id="consolerescript"></script>
</head>

<body>
    <cast-media-player id="player"></cast-media-player>

    <script>
        var isPlaying = false;
        console.re.log('Starting receiver...');
        const context = cast.framework.CastReceiverContext.getInstance();
        const playerManager = context.getPlayerManager();
        
        var sessionToken = null;
        
        playerManager.addEventListener(cast.framework.events.EventType.ALL,
            function (event) {
                console.re.log('event: %s', event);
            });
        playerManager.addEventListener(cast.framework.events.EventType.TIME_UPDATE,
            function (event) {
                if (event.currentMediaTime > 1)
                {
                    isPlaying = true;
                }
            
            });
        playerManager.setMediaPlaybackInfoHandler((loadRequest, playbackConfig) => {
            
            var gNEOriginal = shaka.Player.prototype.getNetworkingEngine;
            shaka.Player.prototype.getNetworkingEngine = function() {
              var networkingEngine = gNEOriginal.apply(this, arguments);
              networkingEngine.registerResponseFilter(function(type, response) {  
                   if (type == shaka.net.NetworkingEngine.RequestType.LICENSE) {
                      console.re.log('networkingEngine  : %s', response);
                   }
              });
              return networkingEngine;
            };
            
            console.re.log('load request: %s', loadRequest);
            playbackConfig.licenseUrl = loadRequest.media.customData.licServer;
            if (loadRequest.media.customData.licServer.indexOf('.asmx') >= 0) {
                playbackConfig.protectionSystem = cast.framework.ContentProtection.PLAYREADY;
            }
            else {
                playbackConfig.protectionSystem = cast.framework.ContentProtection.WIDEVINE;
            }
            

            return getPreauthToken(loadRequest.media.customData.tokenOrUrl).then(tokenData => {
                
                playbackConfig.licenseHandler = licenseData => {
                    var asBase64 = shaka.util.Uint8ArrayUtils.toBase64(licenseData);
                    console.re.log('licenseData length: %s, data: %s', licenseData.length, asBase64);
                    return licenseData;
                };
                
                playbackConfig.licenseRequestHandler = requestInfo => {
                    console.re.log('tokenData: %s', tokenData);
                    Object.assign(requestInfo.headers, tokenData);
                    if (isPlaying)
                    {
                        requestInfo.url = loadRequest.media.customData.renewUrl;
                    }
                    else
                    {
                        requestInfo.url = loadRequest.media.customData.licServer;
                    }
                    //requestInfo.headers['nv-tenant-id'] = loadRequest.media.customData.tenantId;
                    //requestInfo.headers['PreAuthorization'] = token;
                    console.re.log('licenseRequestHandler requestInfo: %s', requestInfo);
                }

                console.re.log('playbackConfig: %s', playbackConfig);
                return playbackConfig;
            });


        });

        function getPreauthToken(tokenOrUrl) {
            console.re.log('getPreauthToken, tokenOrUrl: %s', tokenOrUrl);
            if (tokenOrUrl.indexOf('http') >= 0) {
                return get(tokenOrUrl).then(json => {
                    return {'PreAuthorization':json.preAuthToken};
                });
            }
            else {
                return new Promise(function (resolve, reject) {
                    resolve({'nv-authorizations':tokenOrUrl});
                });
            }

        }

        function get(url, responseType, headers) {
            // Return a new promise.
            return new Promise(function (resolve, reject) {
                // Do the usual XHR stuff
                var req = new XMLHttpRequest();
                req.responseType = responseType;

                req.open('GET', url);
                for (var key in headers) {
                    if (headers.hasOwnProperty(key)) {
                        console.log(key + " -> " + headers[key]);
                        req.setRequestHeader(key, headers[key]);
                    }
                }

                req.onload = function () {
                    // This is called even on 404 etc
                    // so check the status
                    if (req.status == 200) {
                        // Resolve the promise with the response text
                        resolve(JSON.parse(req.response));
                    }
                    else {
                        // Otherwise reject with the status text
                        // which will hopefully be a meaningful error
                        reject(Error(req.statusText));
                    }
                };

                // Handle network errors
                req.onerror = function () {
                    reject(Error("Network Error"));
                };

                // Make the request
                req.send();
            });
        }


        var playbackConfig = new cast.framework.PlaybackConfig();
        context.start({ playbackConfig: playbackConfig });
    </script>
</body>

</html>