mirror of
https://github.com/gorhill/uBlock.git
synced 2024-07-08 12:57:57 +02:00
58ae9f266b
Currently, this is done the same way we block XMLHttpRequests: mess with the constructor. This was done in the most efficient way I could think of (overhead is relatively minimal). This also injects uBlock's blocking interceptor earlier, thusly covering more requests that may have slipped through before.
314 lines
11 KiB
JavaScript
314 lines
11 KiB
JavaScript
/*******************************************************************************
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µBlock - a browser extension to block requests.
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Copyright (C) 2015 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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/******************************************************************************/
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// For non background pages
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(function(self) {
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'use strict';
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var vAPI = self.vAPI = self.vAPI || {};
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if(vAPI.vapiClientInjected) {
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return;
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}
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vAPI.vapiClientInjected = true;
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vAPI.safari = true;
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vAPI.sessionId = String.fromCharCode(Date.now() % 25 + 97) +
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Math.random().toString(36).slice(2);
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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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// 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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setup: function() {
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if(typeof safari === "undefined") {
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return;
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}
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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 vAPI.sessionId to accept only
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// what is meant for the current context
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if(msg.name === vAPI.sessionId || 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(typeof safari === "undefined") {
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return;
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}
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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.vAPI.messaging.onMessage({
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name: vAPI.sessionId,
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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(vAPI.sessionId, message);
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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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// The following code should run only in content pages
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if(location.protocol === "safari-extension:" || typeof safari !== "object") {
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return;
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}
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var frameId = window === window.top ? 0 : Date.now() % 1E5;
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var parentFrameId = (frameId ? 0 : -1);
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// Helper event to message background,
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// and helper anchor element
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var beforeLoadEvent = new Event("beforeload"),
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linkHelper = document.createElement("a");
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// Inform that we've navigated
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if(frameId === 0) {
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safari.self.tab.canLoad(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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var nodeTypes = {
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"frame": "sub_frame",
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"iframe": "sub_frame",
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"script": "script",
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"img": "image",
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"input": "image",
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"object": "object",
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"embed": "object",
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"link": "stylesheet"
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};
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var shouldBlockDetailedRequest = function(details) {
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linkHelper.href = details.url;
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details.url = linkHelper.href;
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details.frameId = frameId;
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details.parentFrameId = parentFrameId;
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details.timeStamp = Date.now();
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return !(safari.self.tab.canLoad(beforeLoadEvent, details));
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};
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var onBeforeLoad = function(e) {
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if(firstMutation !== false) {
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firstMutation();
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}
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linkHelper.href = e.url;
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if(linkHelper.protocol.charCodeAt(0) !== 104) { // h = 104
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return;
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}
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var details = {
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url: linkHelper.href,
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type: nodeTypes[e.target.nodeName.toLowerCase()] || "other",
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// tabId is determined in the background script
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frameId: frameId,
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parentFrameId: parentFrameId,
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timeStamp: Date.now()
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};
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var response = safari.self.tab.canLoad(e, details);
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if(response === false) {
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e.preventDefault();
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}
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};
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document.addEventListener("beforeload", onBeforeLoad, true);
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// Block popups, intercept XHRs
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var firstMutation = function() {
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document.removeEventListener("DOMContentLoaded", firstMutation, true);
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firstMutation = false;
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document.addEventListener(vAPI.sessionId, function(e) {
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if(shouldBlockDetailedRequest(e.detail)) {
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e.detail.url = false;
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}
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}, true);
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var tmpJS = document.createElement("script");
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var tmpScript = "\
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(function() {\
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var block = function(u, t) {\
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var e = new CustomEvent('" + vAPI.sessionId + "', {\
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detail: {\
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url: u,\
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type: t\
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},\
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bubbles: false\
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});\
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document.dispatchEvent(e);\
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return e.detail.url === false;\
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},\
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wo = open,\
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xo = XMLHttpRequest.prototype.open,\
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img = Image;\
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_noOP = function(){};\
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Image = function() {\
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var x = new img();\
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Object.defineProperty(x, 'src', {\
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get: function() {\
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return x.getAttribute('src');\
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},\
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set: function(val) {\
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x.setAttribute('src', block(val, 'image') ? 'data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=' : val);\
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}\
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});\
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return x;\
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};\
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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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if(block(u, 'xmlhttprequest')) return {send: _noOP};\
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else return xo.apply(this, arguments);\
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};";
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if(frameId === 0) {
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tmpScript += "\
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var pS = history.pushState,\
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rS = history.replaceState,\
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onpopstate = function(e) {\
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if(!e || e.state !== null) {\
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block(location.href, 'popstate');\
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}\
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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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tmpScript += "})();";
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tmpJS.textContent = tmpScript;
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document.documentElement.removeChild(document.documentElement.appendChild(tmpJS));
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};
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document.addEventListener("DOMContentLoaded", firstMutation, true);
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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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})(this);
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/******************************************************************************/
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