mirror of
https://github.com/gorhill/uBlock.git
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53 lines
1.8 KiB
JavaScript
53 lines
1.8 KiB
JavaScript
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/*******************************************************************************
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uBlock Origin - a browser extension to block requests.
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Copyright (C) 2015 Raymond Hill
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see {http://www.gnu.org/licenses/}.
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Home: https://github.com/gorhill/uBlock
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*/
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// https://github.com/gorhill/uBlock/issues/533#issuecomment-164292868
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// If WebRTC is supported, there won't be an exception if we
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// try to instanciate a peer connection object.
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// https://github.com/gorhill/uBlock/issues/533#issuecomment-168097594
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// Because Chromium leaks WebRTC connections after they have been closed
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// and forgotten, we need to test for WebRTC support inside an iframe, this
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// way the closed and forgottetn WebRTC connections are properly garbage
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// collected.
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(function() {
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'use strict';
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var pc = null;
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try {
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var PC = self.RTCPeerConnection || self.webkitRTCPeerConnection;
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if ( PC ) {
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pc = new PC(null);
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}
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} catch (ex) {
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console.error(ex);
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}
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if ( pc !== null ) {
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pc.close();
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}
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window.top.postMessage(
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pc !== null ? 'webRTCSupported' : 'webRTCNotSupported',
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window.location.origin
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);
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})();
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