Created
November 18, 2016 14:36
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getScreenId.html
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| <!-- saved from url=(0046)https://www.webrtc-experiment.com/getSourceId/ --> | |
| <html><head><meta http-equiv="Content-Type" content="text/html; charset=windows-1252"><script> | |
| // https://github.com/muaz-khan/DetectRTC | |
| var DetectRTC = {}; | |
| var screenCallback; | |
| DetectRTC.screen = { | |
| chromeMediaSource: 'screen', | |
| getSourceId: function (callback) { | |
| screenCallback = callback; | |
| window.postMessage('get-sourceId', '*'); | |
| }, | |
| onMessageCallback: function (data) { | |
| // "cancel" button is clicked | |
| if (data == 'PermissionDeniedError') { | |
| DetectRTC.screen.chromeMediaSource = 'PermissionDeniedError'; | |
| if (screenCallback) return screenCallback('PermissionDeniedError'); | |
| else throw new Error('PermissionDeniedError'); | |
| } | |
| // extension notified his presence | |
| if (data == 'rtcmulticonnection-extension-loaded') { | |
| DetectRTC.screen.chromeMediaSource = 'desktop'; | |
| } | |
| // extension shared temp sourceId | |
| if (data.sourceId) { | |
| DetectRTC.screen.sourceId = data.sourceId; | |
| if (screenCallback) screenCallback(DetectRTC.screen.sourceId); | |
| } | |
| }, | |
| getChromeExtensionStatus: function (callback) { | |
| // https://chrome.google.com/webstore/detail/screen-capturing/ajhifddimkapgcifgcodmmfdlknahffk | |
| var extensionid = 'ppnjmjmgjkngfoinjnolcegcbmljaajn'; | |
| var image = document.createElement('img'); | |
| image.src = 'chrome-extension://' + extensionid + '/icon.png'; | |
| image.onload = function () { | |
| DetectRTC.screen.chromeMediaSource = 'screen'; | |
| window.postMessage('are-you-there', '*'); | |
| setTimeout(function () { | |
| if (DetectRTC.screen.chromeMediaSource == 'screen') { | |
| callback('installed-disabled'); | |
| } else callback('installed-enabled'); | |
| }, 2000); | |
| }; | |
| image.onerror = function () { | |
| callback('not-installed'); | |
| }; | |
| } | |
| }; | |
| window.addEventListener('message', function (event) { | |
| if (!event.data || !(typeof event.data == 'string' || event.data.sourceId || event.data.captureSourceId)) return; | |
| if (event.data.captureSourceId) captureSourceId(); | |
| DetectRTC.screen.onMessageCallback(event.data); | |
| }); | |
| function captureSourceId() { | |
| // check if desktop-capture extension installed. | |
| DetectRTC.screen.getChromeExtensionStatus(function (status) { | |
| if (status != 'installed-enabled') { | |
| window.parent.postMessage({ | |
| chromeExtensionStatus: status | |
| }, '*'); | |
| return; | |
| } | |
| DetectRTC.screen.getSourceId(function (sourceId) { | |
| window.parent.postMessage({ | |
| chromeMediaSourceId: sourceId | |
| }, '*'); | |
| }); | |
| }); | |
| } | |
| </script> | |
| </head><body></body></html> |
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