mirror of
https://github.com/gorhill/uBlock.git
synced 2024-09-04 10:09:38 +02:00
208 lines
6.5 KiB
JavaScript
208 lines
6.5 KiB
JavaScript
/*******************************************************************************
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uBlock Origin - a browser extension to block requests.
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Copyright (C) 2014-2106 The uBlock Origin authors
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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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// Purpose of this script is to workaround Chromium issue 129353:
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// https://bugs.chromium.org/p/chromium/issues/detail?id=129353
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// https://github.com/gorhill/uBlock/issues/956
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// https://github.com/gorhill/uBlock/issues/1497
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// WebSocket reference: https://html.spec.whatwg.org/multipage/comms.html
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// A WeakMap is used to hide the real WebSocket instance from caller's view, in
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// order to ensure that the wrapper can't be bypassed.
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// The script removes its own tag from the DOM.
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(function() {
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'use strict';
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var Wrapped = window.WebSocket;
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var toWrapped = new WeakMap();
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var onResponseReceived = function(wrapper, ok) {
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this.onload = this.onerror = null;
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var bag = toWrapped.get(wrapper);
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if ( !ok ) {
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if ( bag.properties.onerror ) {
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bag.properties.onerror(new window.ErrorEvent('error'));
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}
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return;
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}
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var wrapped = new Wrapped(bag.args.url, bag.args.protocols);
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for ( var prop in bag.properties ) {
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wrapped[prop] = bag.properties[prop];
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}
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toWrapped.set(wrapper, wrapped);
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};
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var noopfn = function() {};
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var fallthruGet = function(wrapper, prop, value) {
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var wrapped = toWrapped.get(wrapper);
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if ( !wrapped ) {
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return value;
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}
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if ( wrapped instanceof Wrapped ) {
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return wrapped[prop];
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}
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return wrapped.properties.hasOwnProperty(prop) ?
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wrapped.properties[prop] :
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value;
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};
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var fallthruSet = function(wrapper, prop, value) {
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if ( value instanceof Function ) {
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value = value.bind(wrapper);
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}
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var wrapped = toWrapped.get(wrapper);
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if ( !wrapped ) {
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return;
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}
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if ( wrapped instanceof Wrapped ) {
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wrapped[prop] = value;
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} else {
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wrapped.properties[prop] = value;
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}
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};
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var WebSocket = function(url, protocols) {
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if (
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window.location.protocol === 'https:' &&
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url.lastIndexOf('ws:', 0) === 0
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) {
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var ws = new Wrapped(url, protocols);
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if ( ws ) {
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ws.close();
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}
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}
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Object.defineProperties(this, {
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'binaryType': {
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get: function() {
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return fallthruGet(this, 'binaryType', '');
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},
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set: function(value) {
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fallthruSet(this, 'binaryType', value);
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}
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},
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'bufferedAmount': {
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get: function() {
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return fallthruGet(this, 'bufferedAmount', 0);
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},
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set: noopfn
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},
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'extensions': {
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get: function() {
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return fallthruGet(this, 'extensions', '');
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},
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set: noopfn
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},
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'onclose': {
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get: function() {
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return fallthruGet(this, 'onclose', null);
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},
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set: function(value) {
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fallthruSet(this, 'onclose', value);
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}
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},
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'onerror': {
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get: function() {
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return fallthruGet(this, 'onerror', null);
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},
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set: function(value) {
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fallthruSet(this, 'onerror', value);
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}
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},
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'onmessage': {
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get: function() {
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return fallthruGet(this, 'onmessage', null);
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},
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set: function(value) {
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fallthruSet(this, 'onmessage', value);
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}
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},
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'onopen': {
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get: function() {
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return fallthruGet(this, 'onopen', null);
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},
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set: function(value) {
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fallthruSet(this, 'onopen', value);
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}
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},
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'protocol': {
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get: function() {
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return fallthruGet(this, 'protocol', '');
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},
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set: noopfn
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},
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'readyState': {
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get: function() {
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return fallthruGet(this, 'readyState', 0);
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},
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set: noopfn
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},
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'url': {
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get: function() {
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return fallthruGet(this, 'url', '');
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},
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set: noopfn
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}
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});
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toWrapped.set(this, {
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args: { url: url, protocols: protocols },
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properties: {}
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});
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var img = new Image();
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img.src =
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window.location.origin
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+ '?url=' + encodeURIComponent(url)
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+ '&ubofix=f41665f3028c7fd10eecf573336216d3';
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img.onload = onResponseReceived.bind(img, this, true);
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img.onerror = onResponseReceived.bind(img, this, false);
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};
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WebSocket.prototype.CONNECTING = 0;
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WebSocket.prototype.OPEN = 1;
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WebSocket.prototype.CLOSING = 2;
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WebSocket.prototype.CLOSED = 3;
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WebSocket.prototype.close = function(code, reason) {
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var wrapped = toWrapped.get(this);
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if ( wrapped instanceof Wrapped ) {
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wrapped.close(code, reason);
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}
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};
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WebSocket.prototype.send = function(data) {
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var wrapped = toWrapped.get(this);
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if ( wrapped instanceof Wrapped ) {
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wrapped.send(data);
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}
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};
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window.WebSocket = WebSocket;
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var me = document.currentScript;
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if ( me && me.parentNode !== null ) {
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me.parentNode.removeChild(me);
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}
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})();
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