mirror of
https://github.com/gorhill/uMatrix.git
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659 lines
22 KiB
JavaScript
659 lines
22 KiB
JavaScript
/*******************************************************************************
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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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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/uMatrix
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*/
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/* global chrome, µMatrix */
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/* jshint boss: true */
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/******************************************************************************/
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// Start isolation from global scope
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µMatrix.webRequest = (function() {
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/******************************************************************************/
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// The `id='uMatrix'` is important, it allows µMatrix to detect whether a
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// specific data URI originates from itself.
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var rootFrameReplacement = [
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'<!DOCTYPE html><html id="uMatrix">',
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'<head>',
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'<meta charset="utf-8" />',
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'<style>',
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'@font-face {',
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'font-family:httpsb;',
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'font-style:normal;',
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'font-weight:400;',
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'src: local("httpsb"),url("', µMatrix.fontCSSURL, '") format("truetype");',
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'}',
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'body {',
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'margin:0;',
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'border:0;',
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'padding:0;',
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'font:15px httpsb,sans-serif;',
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'width:100%;',
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'height:100%;',
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'background-color:transparent;',
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'background-size:10px 10px;',
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'background-image:',
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'repeating-linear-gradient(',
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'-45deg,',
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'rgba(204,0,0,0.5),rgba(204,0,0,0.5) 24%,',
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'transparent 26%,transparent 49%,',
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'rgba(204,0,0,0.5) 51%,rgba(204,0,0,0.5) 74%,',
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'transparent 76%,transparent',
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');',
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'text-align: center;',
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'}',
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'#p {',
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'margin:8px;',
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'padding:4px;',
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'display:inline-block;',
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'background-color:white;',
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'}',
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'#t {',
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'margin:2px;',
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'border:0;',
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'padding:0 2px;',
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'display:inline-block;',
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'}',
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'#t b {',
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'padding:0 4px;',
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'background-color:#eee;',
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'font-weight:normal;',
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'}',
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'</style>',
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'<link href="{{cssURL}}?url={{originalURL}}&hostname={{hostname}}&t={{now}}" rel="stylesheet" type="text/css">',
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'<title>Blocked by μMatrix</title>',
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'</head>',
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'<body>',
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'<div id="p">',
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'<div id="t"><b>{{hostname}}</b> blocked by μMatrix</div>',
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'</div>',
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'</body>',
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'</html>'
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].join('');
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var subFrameReplacement = [
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'<!DOCTYPE html>',
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'<html>',
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'<head>',
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'<meta charset="utf-8" />',
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'<style>',
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'@font-face{',
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'font-family:httpsb;',
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'font-style:normal;',
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'font-weight:400;',
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'src:local("httpsb"),url("', µMatrix.fontCSSURL, '") format("truetype");',
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'}',
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'body{',
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'margin:0;',
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'border:0;',
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'padding:0;',
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'font:13px httpsb,sans-serif;',
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'}',
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'#bg{',
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'border:1px dotted {{subframeColor}};',
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'position:absolute;',
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'top:0;',
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'right:0;',
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'bottom:0;',
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'left:0;',
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'background-color:transparent;',
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'background-size:10px 10px;',
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'background-image:',
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'repeating-linear-gradient(',
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'-45deg,',
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'{{subframeColor}},{{subframeColor}} 24%,',
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'transparent 25%,transparent 49%,',
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'{{subframeColor}} 50%,{{subframeColor}} 74%,',
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'transparent 75%,transparent',
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');',
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'opacity:{{subframeOpacity}};',
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'text-align:center;',
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'}',
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'#bg > div{',
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'display:inline-block;',
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'background-color:rgba(255,255,255,1);',
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'}',
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'#bg > div > a {',
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'padding:0 2px;',
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'display:inline-block;',
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'color:white;',
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'background-color:{{subframeColor}};',
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'text-decoration:none;',
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'}',
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'</style>',
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'<title>Blocked by μMatrix</title>',
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'</head>',
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'<body title="“{{hostname}}” frame\nblocked by μMatrix">',
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'<div id="bg"><div><a href="{{frameSrc}}" target="_blank">{{hostname}}</a></div></div>',
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'</body>',
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'</html>'
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].join('');
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/******************************************************************************/
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// If it is HTTP Switchboard's root frame replacement URL, verify that
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// the page that was blacklisted is still blacklisted, and if not,
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// redirect to the previously blacklisted page.
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var onBeforeChromeExtensionRequestHandler = function(details) {
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var requestURL = details.url;
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// console.debug('onBeforeChromeExtensionRequestHandler()> "%s": %o', details.url, details);
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// rhill 2013-12-10: Avoid regex whenever a faster indexOf() can be used:
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// here we can use fast indexOf() as a first filter -- which is executed
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// for every single request (so speed matters).
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var matches = requestURL.match(/url=([^&]+)&hostname=([^&]+)/);
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if ( !matches ) {
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return;
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}
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var µm = µMatrix;
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var pageURL = decodeURIComponent(matches[1]);
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var pageHostname = decodeURIComponent(matches[2]);
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// Blacklisted as per matrix?
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if ( µm.mustBlock(µm.scopeFromURL(pageURL), pageHostname, 'doc') ) {
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return;
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}
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µMatrix.asyncJobs.add(
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'gotoURL-' + details.tabId,
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{ tabId: details.tabId, url: pageURL },
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µm.utils.gotoURL,
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200,
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false
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);
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};
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/******************************************************************************/
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// Intercept and filter web requests according to white and black lists.
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var onBeforeRootFrameRequestHandler = function(details) {
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var µm = µMatrix;
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var requestURL = details.url;
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var tabId = details.tabId;
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µm.tabContextManager.push(tabId, requestURL);
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var tabContext = µm.tabContextManager.mustLookup(tabId);
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var pageStore = µm.bindTabToPageStats(tabId, 'weak');
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// Disallow request as per matrix?
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var block = µm.mustBlock(tabContext.rootHostname, details.hostname, 'doc');
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// console.debug('onBeforeRequestHandler()> block=%s "%s": %o', block, details.url, details);
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pageStore.recordRequest('doc', requestURL, block);
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pageStore.updateBadgeAsync();
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// Not blocked
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if ( !block ) {
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// rhill 2013-11-07: Senseless to do this for behind-the-scene requests.
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// rhill 2013-12-03: Do this here only for root frames.
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µm.cookieHunter.recordPageCookies(pageStore);
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return;
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}
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// Blocked
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// If it's a blacklisted frame, redirect to frame.html
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// rhill 2013-11-05: The root frame contains a link to noop.css, this
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// allows to later check whether the root frame has been unblocked by the
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// user, in which case we are able to force a reload using a redirect.
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var html = rootFrameReplacement;
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html = html.replace('{{cssURL}}', µm.noopCSSURL);
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html = html.replace(/{{hostname}}/g, encodeURIComponent(requestHostname));
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html = html.replace('{{originalURL}}', encodeURIComponent(requestURL));
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html = html.replace('{{now}}', String(Date.now()));
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var dataURI = 'data:text/html;base64,' + btoa(html);
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return { 'redirectUrl': dataURI };
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};
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/******************************************************************************/
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// Intercept and filter web requests according to white and black lists.
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var onBeforeRequestHandler = function(details) {
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var µm = µMatrix;
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var µmuri = µm.URI.set(details.url);
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var requestScheme = µmuri.scheme;
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// rhill 2014-02-17: Ignore 'filesystem:': this can happen when listening
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// to 'chrome-extension://'.
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if ( requestScheme === 'filesystem' ) {
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return;
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}
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// console.debug('onBeforeRequestHandler()> "%s": %o', details.url, details);
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var requestType = requestTypeNormalizer[details.type] || 'other';
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// https://github.com/gorhill/httpswitchboard/issues/303
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// Wherever the main doc comes from, create a receiver page URL: synthetize
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// one if needed.
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if ( requestType === 'doc' && details.parentFrameId < 0 ) {
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return onBeforeRootFrameRequestHandler(details);
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}
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var requestURL = details.url;
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// Is it µMatrix's noop css file?
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if ( requestType === 'css' && requestURL.lastIndexOf(µm.noopCSSURL, 0) === 0 ) {
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return onBeforeChromeExtensionRequestHandler(details);
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}
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// Ignore non-http schemes
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if ( requestScheme.indexOf('http') !== 0 ) {
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return;
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}
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// Do not block myself from updating assets
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// https://github.com/gorhill/httpswitchboard/issues/202
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if ( requestType === 'xhr' && requestURL.lastIndexOf(µm.projectServerRoot, 0) === 0 ) {
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return;
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}
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// Re-classify orphan HTTP requests as behind-the-scene requests. There is
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// not much else which can be done, because there are URLs
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// which cannot be handled by µMatrix, i.e. `opera://startpage`,
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// as this would lead to complications with no obvious solution, like how
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// to scope on unknown scheme? Etc.
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// https://github.com/gorhill/httpswitchboard/issues/191
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// https://github.com/gorhill/httpswitchboard/issues/91#issuecomment-37180275
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var tabContext = µm.tabContextManager.mustLookup(details.tabId);
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var tabId = tabContext.tabId;
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var requestHostname = µmuri.hostname;
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// Disallow request as per temporary matrix?
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var block = µm.mustBlock(tabContext.rootHostname, requestHostname, requestType);
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// Record request.
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// https://github.com/gorhill/httpswitchboard/issues/342
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// The way requests are handled now, it may happen at this point some
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// processing has already been performed, and that a synthetic URL has
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// been constructed for logging purpose. Use this synthetic URL if
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// it is available.
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var pageStore = µm.mustPageStoreFromTabId(details.tabId);
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pageStore.recordRequest(requestType, requestURL, block);
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pageStore.updateBadgeAsync();
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// whitelisted?
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if ( !block ) {
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// console.debug('onBeforeRequestHandler()> ALLOW "%s": %o', details.url, details);
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return;
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}
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// blacklisted
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// console.debug('onBeforeRequestHandler()> BLOCK "%s": %o', details.url, details);
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// If it's a blacklisted frame, redirect to frame.html
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// rhill 2013-11-05: The root frame contains a link to noop.css, this
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// allows to later check whether the root frame has been unblocked by the
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// user, in which case we are able to force a reload using a redirect.
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if ( requestType === 'frame' ) {
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var html = subFrameReplacement
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.replace(/{{hostname}}/g, requestHostname)
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.replace('{{frameSrc}}', requestURL)
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.replace(/{{subframeColor}}/g, µm.userSettings.subframeColor)
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.replace('{{subframeOpacity}}', (µm.userSettings.subframeOpacity / 100).toFixed(1));
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return { 'redirectUrl': 'data:text/html,' + encodeURIComponent(html) };
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}
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return { 'cancel': true };
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};
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/******************************************************************************/
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// Sanitize outgoing headers as per user settings.
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var onBeforeSendHeadersHandler = function(details) {
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var µm = µMatrix;
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// console.debug('onBeforeSendHeadersHandler()> "%s": %o', details.url, details);
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// Re-classify orphan HTTP requests as behind-the-scene requests. There is
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// not much else which can be done, because there are URLs
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// which cannot be handled by HTTP Switchboard, i.e. `opera://startpage`,
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// as this would lead to complications with no obvious solution, like how
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// to scope on unknown scheme? Etc.
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// https://github.com/gorhill/httpswitchboard/issues/191
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// https://github.com/gorhill/httpswitchboard/issues/91#issuecomment-37180275
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var pageStore = µm.mustPageStoreFromTabId(details.tabId);
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var tabId = pageStore.tabId;
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// https://github.com/gorhill/httpswitchboard/issues/342
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// Is this hyperlink auditing?
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// If yes, create a synthetic URL for reporting hyperlink auditing
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// in request log. This way the user is better informed of what went
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// on.
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// http://www.whatwg.org/specs/web-apps/current-work/multipage/links.html#hyperlink-auditing
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//
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// Target URL = the href of the link
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// Doc URL = URL of the document containing the target URL
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// Ping URLs = servers which will be told that user clicked target URL
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//
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// `Content-Type` = `text/ping` (always present)
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// `Ping-To` = target URL (always present)
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// `Ping-From` = doc URL
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// `Referer` = doc URL
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// request URL = URL which will receive the information
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//
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// With hyperlink-auditing, removing header(s) is pointless, the whole
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// request must be cancelled.
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var requestURL = details.url;
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var requestType = requestTypeNormalizer[details.type] || 'other';
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if ( requestType === 'ping' ) {
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var linkAuditor = details.requestHeaders.getHeader('ping-to');
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if ( linkAuditor !== '' ) {
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var block = µm.userSettings.processHyperlinkAuditing;
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pageStore.recordRequest('other', requestURL + '{Ping-To:' + linkAuditor + '}', block);
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pageStore.updateBadgeAsync();
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if ( block ) {
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µm.hyperlinkAuditingFoiledCounter += 1;
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return { 'cancel': true };
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}
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}
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}
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// If we reach this point, request is not blocked, so what is left to do
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// is to sanitize headers.
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var reqHostname = µm.hostnameFromURL(requestURL);
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if ( µm.mustBlock(pageStore.pageHostname, reqHostname, 'cookie') ) {
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if ( details.requestHeaders.setHeader('cookie', '') ) {
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µm.cookieHeaderFoiledCounter++;
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}
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}
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if ( µm.tMatrix.evaluateSwitchZ('referrer-spoof', pageStore.pageHostname) ) {
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foilRefererHeaders(µm, reqHostname, details);
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}
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if ( µm.tMatrix.evaluateSwitchZ('ua-spoof', pageStore.pageHostname) ) {
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details.requestHeaders.setHeader('user-agent', µm.userAgentReplaceStr);
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}
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};
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/******************************************************************************/
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var foilRefererHeaders = function(µm, toHostname, details) {
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var referer = details.requestHeaders.getHeader('referer');
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if ( referer === '' ) {
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return;
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}
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var µmuri = µm.URI;
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if ( µmuri.domainFromHostname(toHostname) === µmuri.domainFromURI(referer) ) {
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return;
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}
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//console.debug('foilRefererHeaders()> foiled referer for "%s"', details.url);
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//console.debug('\treferrer "%s"', header.value);
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// https://github.com/gorhill/httpswitchboard/issues/222#issuecomment-44828402
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details.requestHeaders.setHeader(
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'referer',
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µmuri.schemeFromURI(details.url) + '://' + toHostname + '/'
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);
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µm.refererHeaderFoiledCounter++;
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};
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/******************************************************************************/
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// To prevent inline javascript from being executed.
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// Prevent inline scripting using `Content-Security-Policy`:
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// https://dvcs.w3.org/hg/content-security-policy/raw-file/tip/csp-specification.dev.html
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// This fixes:
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// https://github.com/gorhill/httpswitchboard/issues/35
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var onHeadersReceived = function(details) {
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// console.debug('onHeadersReceived()> "%s": %o', details.url, details);
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// Ignore schemes other than 'http...'
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if ( details.url.lastIndexOf('http', 0) !== 0 ) {
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return;
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}
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var requestType = requestTypeNormalizer[details.type] || 'other';
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if ( requestType === 'frame' ) {
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return onSubDocHeadersReceived(details);
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}
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if ( requestType === 'doc' ) {
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return onMainDocHeadersReceived(details);
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}
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};
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/******************************************************************************/
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var onMainDocHeadersReceived = function(details) {
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var µm = µMatrix;
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// https://github.com/gorhill/uMatrix/issues/145
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// Check if the main_frame is a download
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if ( headerValue(details.responseHeaders, 'content-disposition').lastIndexOf('attachment', 0) === 0 ) {
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µm.tabContextManager.unpush(details.tabId, details.url);
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}
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var tabContext = µm.tabContextManager.lookup(details.tabId);
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if ( tabContext === null ) {
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return;
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}
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// console.debug('onMainDocHeadersReceived()> "%s": %o', details.url, details);
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// rhill 2013-12-07:
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// Apparently in Opera, onBeforeRequest() is triggered while the
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// URL is not yet bound to a tab (-1), which caused the code here
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// to not be able to lookup the page store. So let the code here bind
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// the page to a tab if not done yet.
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// https://github.com/gorhill/httpswitchboard/issues/75
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// TODO: check this works fine on Opera
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// Re-classify orphan HTTP requests as behind-the-scene requests. There is
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// not much else which can be done, because there are URLs
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// which cannot be handled by HTTP Switchboard, i.e. `opera://startpage`,
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// as this would lead to complications with no obvious solution, like how
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// to scope on unknown scheme? Etc.
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// https://github.com/gorhill/httpswitchboard/issues/191
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// https://github.com/gorhill/httpswitchboard/issues/91#issuecomment-37180275
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var pageStore = µm.mustPageStoreFromTabId(details.tabId);
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var headers = details.responseHeaders;
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// Maybe modify inbound headers
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var csp = '';
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// Enforce strict HTTPS?
|
|
var requestScheme = µm.URI.schemeFromURI(details.url);
|
|
if ( requestScheme === 'https' && µm.tMatrix.evaluateSwitchZ('https-strict', tabContext.rootHostname) ) {
|
|
csp += "default-src chrome-search: data: https: wss: 'unsafe-eval' 'unsafe-inline';";
|
|
}
|
|
|
|
// https://github.com/gorhill/httpswitchboard/issues/181
|
|
pageStore.pageScriptBlocked = µm.mustBlock(tabContext.rootHostname, tabContext.rootHostname, 'script');
|
|
if ( pageStore.pageScriptBlocked ) {
|
|
// If javascript not allowed, say so through a `Content-Security-Policy` directive.
|
|
// console.debug('onMainDocHeadersReceived()> PAGE CSP "%s": %o', details.url, details);
|
|
csp += " script-src 'none'";
|
|
}
|
|
|
|
// https://github.com/gorhill/httpswitchboard/issues/181
|
|
if ( csp !== '' ) {
|
|
headers.push({
|
|
'name': 'Content-Security-Policy',
|
|
'value': csp.trim()
|
|
});
|
|
return { responseHeaders: headers };
|
|
}
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
var onSubDocHeadersReceived = function(details) {
|
|
|
|
// console.debug('onSubDocHeadersReceived()> "%s": %o', details.url, details);
|
|
|
|
var µm = µMatrix;
|
|
|
|
// Do not ignore traffic outside tabs.
|
|
// https://github.com/gorhill/httpswitchboard/issues/91#issuecomment-37180275
|
|
var tabId = details.tabId;
|
|
var tabContext = µm.tabContextManager.lookup(tabId);
|
|
if ( tabContext === null ) {
|
|
return;
|
|
}
|
|
|
|
// Evaluate
|
|
if ( µm.mustAllow(tabContext.rootHostname, µm.hostnameFromURL(details.url), 'script') ) {
|
|
return;
|
|
}
|
|
|
|
// If javascript not allowed, say so through a `Content-Security-Policy`
|
|
// directive.
|
|
|
|
// For inline javascript within iframes, we need to sandbox.
|
|
|
|
// https://github.com/gorhill/httpswitchboard/issues/73
|
|
// Now because sandbox cancels all permissions, this means
|
|
// not just javascript is disabled. To avoid negative side
|
|
// effects, I allow some other permissions, but...
|
|
|
|
// https://github.com/gorhill/uMatrix/issues/27
|
|
// Need to add `allow-popups` to prevent completely breaking links on
|
|
// some sites old style sites.
|
|
|
|
// TODO: Reuse CSP `sandbox` directive if it's already in the
|
|
// headers (strip out `allow-scripts` if present),
|
|
// and find out if the `sandbox` in the header interfere with a
|
|
// `sandbox` attribute which might be present on the iframe.
|
|
|
|
// console.debug('onSubDocHeadersReceived()> FRAME CSP "%s": %o, scope="%s"', details.url, details, pageURL);
|
|
|
|
details.responseHeaders.push({
|
|
'name': 'Content-Security-Policy',
|
|
'value': "script-src 'none'"
|
|
});
|
|
|
|
return { responseHeaders: details.responseHeaders };
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
var headerValue = function(headers, name) {
|
|
var i = headers.length;
|
|
while ( i-- ) {
|
|
if ( headers[i].name.toLowerCase() === name ) {
|
|
return headers[i].value.trim();
|
|
}
|
|
}
|
|
return '';
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
// Caller must ensure headerName is normalized to lower case.
|
|
|
|
var headerIndexFromName = function(headerName, headers) {
|
|
var i = headers.length;
|
|
while ( i-- ) {
|
|
if ( headers[i].name.toLowerCase() === headerName ) {
|
|
return i;
|
|
}
|
|
}
|
|
return -1;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
var requestTypeNormalizer = {
|
|
'font' : 'css',
|
|
'image' : 'image',
|
|
'main_frame' : 'doc',
|
|
'object' : 'plugin',
|
|
'other' : 'other',
|
|
'ping' : 'ping',
|
|
'script' : 'script',
|
|
'stylesheet' : 'css',
|
|
'sub_frame' : 'frame',
|
|
'xmlhttprequest': 'xhr'
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
vAPI.net.onBeforeRequest = {
|
|
urls: [
|
|
"http://*/*",
|
|
"https://*/*",
|
|
"chrome-extension://*/*"
|
|
],
|
|
extra: [ 'blocking' ],
|
|
callback: onBeforeRequestHandler
|
|
};
|
|
|
|
vAPI.net.onBeforeSendHeaders = {
|
|
urls: [
|
|
"http://*/*",
|
|
"https://*/*"
|
|
],
|
|
extra: [ 'blocking', 'requestHeaders' ],
|
|
callback: onBeforeSendHeadersHandler
|
|
};
|
|
|
|
vAPI.net.onHeadersReceived = {
|
|
urls: [
|
|
"http://*/*",
|
|
"https://*/*"
|
|
],
|
|
types: [
|
|
"main_frame",
|
|
"sub_frame"
|
|
],
|
|
extra: [ 'blocking', 'responseHeaders' ],
|
|
callback: onHeadersReceived
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
var start = function() {
|
|
vAPI.net.registerListeners();
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
return {
|
|
blockedRootFramePrefix: 'data:text/html;base64,' + btoa(rootFrameReplacement).slice(0, 80),
|
|
start: start
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
})();
|
|
|
|
/******************************************************************************/
|
|
|