mirror of
https://github.com/gorhill/uBlock.git
synced 2024-07-19 19:52:51 +02:00
445 lines
14 KiB
JavaScript
445 lines
14 KiB
JavaScript
/*******************************************************************************
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µBlock - a browser extension to block requests.
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Copyright (C) 2014 The µBlock 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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// For non background pages
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/******************************************************************************/
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(function() {
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'use strict';
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/******************************************************************************/
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self.vAPI = self.vAPI || {};
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vAPI.safari = true;
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/******************************************************************************/
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var messagingConnector = function(response) {
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if ( !response ) {
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return;
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}
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var channels = vAPI.messaging.channels;
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var channel, listener;
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if ( response.broadcast === true && !response.channelName ) {
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for ( channel in channels ) {
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if ( channels.hasOwnProperty(channel) === false ) {
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continue;
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}
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listener = channels[channel].listener;
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if ( typeof listener === 'function' ) {
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listener(response.msg);
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}
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}
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return;
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}
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if ( response.requestId ) {
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listener = vAPI.messaging.listeners[response.requestId];
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delete vAPI.messaging.listeners[response.requestId];
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delete response.requestId;
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}
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if ( !listener ) {
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channel = channels[response.channelName];
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listener = channel && channel.listener;
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}
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if ( typeof listener === 'function' ) {
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listener(response.msg);
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}
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};
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/******************************************************************************/
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var uniqueId = function() {
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return Math.random().toString(36).slice(2);
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};
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/******************************************************************************/
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// Relevant?
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// https://developer.apple.com/library/safari/documentation/Tools/Conceptual/SafariExtensionGuide/MessagesandProxies/MessagesandProxies.html#//apple_ref/doc/uid/TP40009977-CH14-SW12
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vAPI.messaging = {
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channels: {},
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listeners: {},
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requestId: 1,
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connectorId: uniqueId(),
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setup: function() {
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this.connector = function(msg) {
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// messages from the background script are sent to every frame,
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// so we need to check the connectorId to accept only
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// what is meant for the current context
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if ( msg.name === vAPI.messaging.connectorId
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|| msg.name === 'broadcast' ) {
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messagingConnector(msg.message);
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}
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};
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safari.self.addEventListener('message', this.connector, false);
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this.channels['vAPI'] = {
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listener: function(msg) {
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if ( msg.cmd === 'injectScript' && msg.details.code ) {
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Function(msg.details.code).call(self);
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}
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}
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};
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},
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close: function() {
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if ( this.connector ) {
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safari.self.removeEventListener('message', this.connector, false);
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this.connector = null;
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this.channels = {};
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this.listeners = {};
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}
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},
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channel: function(channelName, callback) {
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if ( !channelName ) {
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return;
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}
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this.channels[channelName] = {
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channelName: channelName,
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listener: typeof callback === 'function' ? callback : null,
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send: function(message, callback) {
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if ( !vAPI.messaging.connector ) {
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vAPI.messaging.setup();
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}
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message = {
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channelName: this.channelName,
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msg: message
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};
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if ( callback ) {
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message.requestId = vAPI.messaging.requestId++;
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vAPI.messaging.listeners[message.requestId] = callback;
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}
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// popover content doesn't know messaging...
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if ( safari.extension.globalPage ) {
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if ( !safari.self.visible ) {
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return;
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}
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safari.extension.globalPage.contentWindow
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.vAPI.messaging.onMessage({
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name: vAPI.messaging.connectorId,
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message: message,
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target: {
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page: {
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dispatchMessage: function(name, msg) {
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messagingConnector(msg);
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}
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}
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}
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});
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} else {
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safari.self.tab.dispatchMessage(
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vAPI.messaging.connectorId,
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message
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);
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}
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},
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close: function() {
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delete vAPI.messaging.channels[this.channelName];
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}
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};
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return this.channels[channelName];
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}
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};
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/******************************************************************************/
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vAPI.canExecuteContentScript = function() {
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return /^https?:/.test(location.protocol);
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};
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/******************************************************************************/
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// This file can be included into extensin pages,
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// but the following code should run only in content pages.
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if ( location.protocol === 'safari-extension:' ) {
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return;
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}
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/******************************************************************************/
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window.MutationObserver = window.MutationObserver || window.WebKitMutationObserver;
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if ( !window.MutationObserver ) {
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// Dummy, minimalistic shim for older versions (<6)
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// only supports node insertions, but currently we don't use it for anything else
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window.MutationObserver = function(handler) {
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this.observe = function(target) {
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target.addEventListener('DOMNodeInserted', function(e) {
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handler([{ addedNodes: [e.target] }]);
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}, true);
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};
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};
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}
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/******************************************************************************/
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var beforeLoadEvent = document.createEvent('Event');
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beforeLoadEvent.initEvent('beforeload');
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/******************************************************************************/
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var frameId = window === window.top ? 0 : Date.now() % 1E5;
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var linkHelper = document.createElement('a');
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var onBeforeLoad = function(e, details) {
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if ( e.url && e.url.slice(0, 5) === 'data:' ) {
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return;
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}
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linkHelper.href = details ? details.url : e.url;
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if ( linkHelper.protocol !== 'http:' && linkHelper.protocol !== 'https:' ) {
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if ( !(details && details.type === 'popup') ) {
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return;
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}
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}
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if ( details ) {
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details.url = linkHelper.href;
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} else {
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details = {
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url: linkHelper.href
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};
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switch ( e.target.nodeName.toLowerCase() ) {
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case 'frame':
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case 'iframe':
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details.type = 'sub_frame';
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break;
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case 'script':
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details.type = 'script';
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break;
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case 'img':
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case 'input': // type=image
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details.type = 'image';
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break;
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case 'object':
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case 'embed':
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details.type = 'object';
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break;
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case 'link':
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var rel = e.target.rel.trim().toLowerCase();
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if ( rel.indexOf('icon') !== -1 ) {
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details.type = 'image';
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break;
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} else if ( rel === 'stylesheet' ) {
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details.type = 'stylesheet';
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break;
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}
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default:
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details.type = 'other';
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}
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}
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// This can run even before the first DOMSubtreeModified event fired
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if ( firstMutation ) {
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firstMutation();
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}
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// tabId is determined in the background script
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// details.tabId = null;
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details.frameId = frameId;
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details.parentFrameId = frameId ? 0 : -1;
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details.timeStamp = Date.now();
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var response = safari.self.tab.canLoad(e, details);
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if ( !response ) {
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if ( details.type === 'main_frame' ) {
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window.stop();
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} else {
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e.preventDefault();
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}
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return false;
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}
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// Local mirroring, response should be a data: URL here
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if ( typeof response !== 'string' ) {
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return;
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}
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e.preventDefault();
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// Content Security Policy with disallowed inline scripts may break things
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details = document.createElement('script');
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details.textContent = atob(response.slice(response.indexOf(',', 20) + 1));
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if ( e.target.hasAttribute('defer') && document.readyState === 'loading' ) {
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var jsOnLoad = function(ev) {
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this.removeEventListener(ev.type, jsOnLoad, true);
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this.body.removeChild(this.body.appendChild(details));
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};
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document.addEventListener('DOMContentLoaded', jsOnLoad, true);
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} else {
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e.target.parentNode.insertBefore(details, e.target);
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details.parentNode.removeChild(details);
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}
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};
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document.addEventListener('beforeload', onBeforeLoad, true);
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/******************************************************************************/
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// block pop-ups, intercept xhr requests, and apply site patches
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var firstMutation = function() {
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document.removeEventListener('DOMSubtreeModified', firstMutation, true);
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firstMutation = null;
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var randEventName = uniqueId();
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window.addEventListener(randEventName, function(e) {
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var result = onBeforeLoad(beforeLoadEvent, e.detail);
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if ( result === false ) {
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e.detail.url = false;
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}
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}, true);
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// the extension context is unable to reach the page context,
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// also this only works when Content Security Policy allows inline scripts
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var tmpJS = document.createElement('script');
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var tmpScript = ['(function() {',
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'var block = function(u, t) {',
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'var e = document.createEvent("CustomEvent"),',
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'd = {url: u, type: t};',
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'e.initCustomEvent("' + randEventName + '", false, false, d);',
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'dispatchEvent(e);',
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'return d.url === false;',
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'}, wo = open, xo = XMLHttpRequest.prototype.open;',
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'open = function(u) {',
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'return block(u, "popup") ? null : wo.apply(this, arguments);',
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'};',
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'XMLHttpRequest.prototype.open = function(m, u, s) {',
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'return xo.apply(',
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'this,',
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'block(u, "xmlhttprequest") ? ["HEAD", u, s] : arguments',
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');',
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'};'
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];
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if ( frameId === 0 ) {
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tmpScript.push(
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'var pS = history.pushState, rS = history.replaceState,',
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'onpopstate = function(e) {',
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'if (!e || e.state !== null) block(location.href, "popstate");',
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'};',
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'window.addEventListener("popstate", onpopstate, true);',
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'history.pushState = function() {',
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'var r = pS.apply(this, arguments);',
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'onpopstate();',
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'return r;',
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'};',
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'history.replaceState = function() {',
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'var r = rS.apply(this, arguments);',
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'onpopstate();',
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'return r;',
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'};'
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);
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}
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var block = safari.self.tab.canLoad(beforeLoadEvent, {
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isURLWhiteListed: location.href
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});
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if ( vAPI.sitePatch && !block ) {
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tmpScript.push('(' + vAPI.sitePatch + ')();');
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}
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tmpScript.push('})();');
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tmpJS.textContent = tmpScript.join('');
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document.documentElement.removeChild(
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document.documentElement.appendChild(tmpJS)
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);
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};
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document.addEventListener('DOMSubtreeModified', firstMutation, true);
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/******************************************************************************/
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var onContextMenu = function(e) {
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var target = e.target;
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var tagName = target.tagName.toLowerCase();
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var details = {
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tagName: tagName,
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pageUrl: location.href,
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insideFrame: window !== window.top
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};
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details.editable = tagName === 'textarea' || tagName === 'input';
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if ( target.hasOwnProperty('checked') ) {
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details.checked = target.checked;
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}
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if ( tagName === 'a' ) {
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details.linkUrl = target.href;
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}
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if ( target.hasOwnProperty('src') ) {
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details.srcUrl = target.src;
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if ( tagName === 'img' ) {
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details.mediaType = 'image';
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} else if ( tagName === 'video' || tagName === 'audio' ) {
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details.mediaType = tagName;
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}
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}
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safari.self.tab.setContextMenuEventUserInfo(e, details);
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};
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self.addEventListener('contextmenu', onContextMenu, true);
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/******************************************************************************/
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// 'main_frame' simulation
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if ( frameId === 0 ) {
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onBeforeLoad(beforeLoadEvent, {
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url: location.href,
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type: 'main_frame'
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});
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}
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/******************************************************************************/
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})();
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/******************************************************************************/
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