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@ -1,7 +1,7 @@ |
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/******************************************************************************* |
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µMatrix - a Chromium browser extension to black/white list requests. |
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Copyright (C) 2014 Raymond Hill |
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Copyright (C) 2014-2105 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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@ -63,18 +63,18 @@ vAPI.contentscriptEndInjected = true; |
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var localMessager = vAPI.messaging.channel('contentscript-end.js'); |
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vAPI.shutdown.add(function() { |
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localMessager.close(); |
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}); |
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/******************************************************************************/ |
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/******************************************************************************/ |
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// This is to be executed only once: putting this code in its own closure
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// means the code will be flushed from memory once executed.
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(function() { |
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/******************************************************************************/ |
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// Unrendered noscript (because CSP) workaround
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/*------------[ Unrendered Noscript (because CSP) Workaround ]----------------*/ |
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// Executed once.
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(function() { |
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var checkScriptBlacklistedHandler = function(response) { |
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if ( !response.scriptBlacklisted ) { |
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return; |
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@ -94,9 +94,14 @@ localMessager.send({ |
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what: 'checkScriptBlacklisted', |
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url: window.location.href |
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}, checkScriptBlacklistedHandler); |
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})(); |
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/******************************************************************************/ |
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/******************************************************************************/ |
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// Executed only once.
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(function() { |
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var localStorageHandler = function(mustRemove) { |
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if ( mustRemove ) { |
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window.localStorage.clear(); |
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@ -135,16 +140,166 @@ try { |
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} |
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catch (e) { |
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} |
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/******************************************************************************/ |
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})(); |
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/******************************************************************************/ |
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/******************************************************************************/ |
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(function() { |
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// https://github.com/gorhill/uMatrix/issues/45
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var collapser = (function() { |
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var timer = null; |
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var requestId = 1; |
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var newRequests = []; |
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var pendingRequests = {}; |
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var pendingRequestCount = 0; |
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var srcProps = { |
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'iframe': 'src', |
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'img': 'src' |
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}; |
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var PendingRequest = function(target, tagName, attr) { |
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this.id = requestId++; |
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this.target = target; |
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pendingRequests[this.id] = this; |
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pendingRequestCount += 1; |
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}; |
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// Because a while ago I have observed constructors are faster than
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// literal object instanciations.
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var BouncingRequest = function(id, tagName, url) { |
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this.id = id; |
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this.tagName = tagName; |
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this.url = url; |
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this.collapse = false; |
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}; |
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var onProcessed = function(requests) { |
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if ( requests === null || Array.isArray(requests) === false ) { |
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return; |
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} |
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var i = requests.length; |
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var request, entry; |
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while ( i-- ) { |
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request = requests[i]; |
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if ( pendingRequests.hasOwnProperty(request.id) === false ) { |
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continue; |
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} |
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entry = pendingRequests[request.id]; |
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delete pendingRequests[request.id]; |
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pendingRequestCount -= 1; |
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// https://github.com/chrisaljoudi/uBlock/issues/869
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if ( !request.collapse ) { |
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continue; |
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} |
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// https://github.com/chrisaljoudi/uBlock/issues/399
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// Never remove elements from the DOM, just hide them
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entry.target.style.setProperty('display', 'none', 'important'); |
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} |
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// Renew map: I believe that even if all properties are deleted, an
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// object will still use more memory than a brand new one.
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if ( pendingRequestCount === 0 ) { |
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pendingRequests = {}; |
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} |
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}; |
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var send = function() { |
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timer = null; |
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localMessager.send({ |
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what: 'evaluateURLs', |
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requests: newRequests |
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}, onProcessed); |
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newRequests = []; |
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}; |
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var process = function(delay) { |
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if ( newRequests.length === 0 ) { |
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return; |
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} |
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if ( delay === 0 ) { |
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clearTimeout(timer); |
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send(); |
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} else if ( timer === null ) { |
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timer = setTimeout(send, delay || 50); |
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} |
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}; |
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var addNode = function(target) { |
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var tagName = target.localName; |
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var prop = srcProps[tagName]; |
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if ( prop === undefined ) { |
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return; |
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} |
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// https://github.com/chrisaljoudi/uBlock/issues/174
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// Do not remove fragment from src URL
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var src = target[prop]; |
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if ( typeof src !== 'string' || src === '' ) { |
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return; |
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} |
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if ( src.lastIndexOf('http', 0) !== 0 ) { |
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return; |
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} |
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var req = new PendingRequest(target, tagName, prop); |
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newRequests.push(new BouncingRequest(req.id, tagName, src)); |
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}; |
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var addNodes = function(nodes) { |
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var node; |
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var i = nodes.length; |
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while ( i-- ) { |
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node = nodes[i]; |
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if ( node.nodeType === 1 ) { |
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addNode(node); |
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} |
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} |
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}; |
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var addBranches = function(branches) { |
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var root; |
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var i = branches.length; |
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while ( i-- ) { |
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root = branches[i]; |
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if ( root.nodeType === 1 ) { |
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addNode(root); |
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// blocked images will be reported by onResourceFailed
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addNodes(root.querySelectorAll('iframe')); |
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} |
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} |
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}; |
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// Listener to collapse blocked resources.
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// - Future requests not blocked yet
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// - Elements dynamically added to the page
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// - Elements which resource URL changes
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var onResourceFailed = function(ev) { |
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addNode(ev.target); |
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process(); |
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}; |
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document.addEventListener('error', onResourceFailed, true); |
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vAPI.shutdown.add(function() { |
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if ( timer !== null ) { |
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clearTimeout(timer); |
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timer = null; |
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} |
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document.removeEventListener('error', onResourceFailed, true); |
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newRequests = []; |
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pendingRequests = {}; |
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pendingRequestCount = 0; |
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}); |
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return { |
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addNodes: addNodes, |
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addBranches: addBranches, |
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process: process |
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}; |
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})(); |
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/******************************************************************************/ |
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/******************************************************************************/ |
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var nodesAddedHandler = function(nodeList, summary) { |
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@ -154,17 +309,17 @@ var nodesAddedHandler = function(nodeList, summary) { |
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if ( node.nodeType !== 1 ) { |
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continue; |
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} |
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if ( typeof node.tagName !== 'string' ) { |
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if ( typeof node.localName !== 'string' ) { |
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continue; |
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} |
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switch ( node.tagName.toUpperCase() ) { |
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switch ( node.localName ) { |
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case 'SCRIPT': |
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case 'script': |
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// https://github.com/gorhill/httpswitchboard/issues/252
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// Do not count µMatrix's own script tags, they are not required
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// to "unbreak" a web page
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if ( node.id && node.id.indexOf('uMatrix-') === 0 ) { |
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if ( typeof node.id === 'string' && node.id.lastIndexOf('uMatrix-', 0) === 0 ) { |
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break; |
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} |
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text = node.textContent.trim(); |
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@ -179,14 +334,14 @@ var nodesAddedHandler = function(nodeList, summary) { |
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} |
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break; |
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case 'A': |
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if ( node.href.indexOf('javascript:') === 0 ) { |
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case 'a': |
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if ( node.href.lastIndexOf('javascript', 0) === 0 ) { |
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summary.scriptSources['{inline_script}'] = true; |
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summary.mustReport = true; |
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} |
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break; |
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case 'OBJECT': |
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case 'object': |
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src = (node.data || '').trim(); |
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if ( src !== '' ) { |
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summary.pluginSources[src] = true; |
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@ -194,7 +349,7 @@ var nodesAddedHandler = function(nodeList, summary) { |
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} |
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break; |
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case 'EMBED': |
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case 'embed': |
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src = (node.src || '').trim(); |
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if ( src !== '' ) { |
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summary.pluginSources[src] = true; |
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@ -221,13 +376,18 @@ var nodeListsAddedHandler = function(nodeLists) { |
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}; |
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while ( i-- ) { |
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nodesAddedHandler(nodeLists[i], summary); |
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collapser.addBranches(nodeLists[i]); |
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} |
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if ( summary.mustReport ) { |
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localMessager.send(summary); |
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} |
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collapser.process(); |
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}; |
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/******************************************************************************/ |
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/******************************************************************************/ |
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// Executed only once.
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(function() { |
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var summary = { |
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@ -241,18 +401,24 @@ var nodeListsAddedHandler = function(nodeLists) { |
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// &
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// Looks for inline javascript also in at least one a[href] element.
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// https://github.com/gorhill/httpswitchboard/issues/131
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nodesAddedHandler(document.querySelectorAll('script, a[href^="javascript:"], object, embed'), summary); |
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nodesAddedHandler(document.querySelectorAll('a[href^="javascript:"],embed,object,script'), summary); |
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//console.debug('contentscript-end.js > firstObservationHandler(): found %d script tags in "%s"', Object.keys(summary.scriptSources).length, window.location.href);
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localMessager.send(summary); |
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collapser.addNodes(document.querySelectorAll('iframe,img')); |
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collapser.process(); |
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})(); |
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/******************************************************************************/ |
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/******************************************************************************/ |
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// Observe changes in the DOM
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// Added node lists will be cumulated here before being processed
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(function() { |
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var addedNodeLists = []; |
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var addedNodeListsTimer = null; |
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@ -284,17 +450,37 @@ var treeMutationObservedHandlerAsync = function(mutations) { |
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// This fixes http://acid3.acidtests.org/
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if ( document.body ) { |
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return; |
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} |
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// https://github.com/gorhill/httpswitchboard/issues/176
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var treeObserver = new MutationObserver(treeMutationObservedHandlerAsync); |
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treeObserver.observe(document.body, { |
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childList: true, |
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subtree: true |
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}); |
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vAPI.shutdown.add(function() { |
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if ( addedNodeListsTimer !== null ) { |
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clearTimeout(addedNodeListsTimer); |
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addedNodeListsTimer = null; |
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} |
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if ( treeObserver !== null ) { |
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treeObserver.disconnect(); |
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treeObserver = null; |
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} |
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addedNodeLists = []; |
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}); |
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})(); |
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/******************************************************************************/ |
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/******************************************************************************/ |
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})(); |
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localMessager.send({ what: 'shutdown?' }, function(response) { |
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if ( response === true ) { |
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vAPI.shutdown.exec(); |
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} |
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}); |
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/******************************************************************************/ |
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/******************************************************************************/ |
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gorhill
10 years ago
