mirror of
https://github.com/gorhill/uMatrix.git
synced 2024-06-23 08:30:38 +12:00
303 lines
9.9 KiB
JavaScript
303 lines
9.9 KiB
JavaScript
/*******************************************************************************
|
|
|
|
µMatrix - a Chromium browser extension to black/white list requests.
|
|
Copyright (C) 2014 Raymond Hill
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see {http://www.gnu.org/licenses/}.
|
|
|
|
Home: https://github.com/gorhill/uMatrix
|
|
*/
|
|
|
|
/* global vAPI */
|
|
/* jshint multistr: true, boss: true */
|
|
|
|
/******************************************************************************/
|
|
/******************************************************************************/
|
|
|
|
// Injected into content pages
|
|
|
|
(function() {
|
|
|
|
'use strict';
|
|
|
|
/******************************************************************************/
|
|
|
|
// https://github.com/chrisaljoudi/uBlock/issues/464
|
|
if ( document instanceof HTMLDocument === false ) {
|
|
//console.debug('contentscript-end.js > not a HTLMDocument');
|
|
return false;
|
|
}
|
|
|
|
// This can happen
|
|
if ( !vAPI ) {
|
|
//console.debug('contentscript-end.js > vAPI not found');
|
|
return;
|
|
}
|
|
|
|
// https://github.com/chrisaljoudi/uBlock/issues/587
|
|
// Pointless to execute without the start script having done its job.
|
|
if ( !vAPI.contentscriptStartInjected ) {
|
|
return;
|
|
}
|
|
|
|
// https://github.com/chrisaljoudi/uBlock/issues/456
|
|
// Already injected?
|
|
if ( vAPI.contentscriptEndInjected ) {
|
|
//console.debug('contentscript-end.js > content script already injected');
|
|
return;
|
|
}
|
|
vAPI.contentscriptEndInjected = true;
|
|
|
|
/******************************************************************************/
|
|
|
|
var localMessager = vAPI.messaging.channel('contentscript-end.js');
|
|
|
|
/******************************************************************************/
|
|
/******************************************************************************/
|
|
|
|
// This is to be executed only once: putting this code in its own closure
|
|
// means the code will be flushed from memory once executed.
|
|
|
|
(function() {
|
|
|
|
/******************************************************************************/
|
|
|
|
/*------------[ Unrendered Noscript (because CSP) Workaround ]----------------*/
|
|
|
|
var checkScriptBlacklistedHandler = function(response) {
|
|
if ( !response.scriptBlacklisted ) {
|
|
return;
|
|
}
|
|
var scripts = document.querySelectorAll('noscript');
|
|
var i = scripts.length;
|
|
var realNoscript, fakeNoscript;
|
|
while ( i-- ) {
|
|
realNoscript = scripts[i];
|
|
fakeNoscript = document.createElement('div');
|
|
fakeNoscript.innerHTML = '<!-- uMatrix NOSCRIPT tag replacement: see <https://github.com/gorhill/httpswitchboard/issues/177> -->\n' + realNoscript.textContent;
|
|
realNoscript.parentNode.replaceChild(fakeNoscript, realNoscript);
|
|
}
|
|
};
|
|
|
|
localMessager.send({
|
|
what: 'checkScriptBlacklisted',
|
|
url: window.location.href
|
|
}, checkScriptBlacklistedHandler);
|
|
|
|
/******************************************************************************/
|
|
|
|
var localStorageHandler = function(mustRemove) {
|
|
if ( mustRemove ) {
|
|
window.localStorage.clear();
|
|
window.sessionStorage.clear();
|
|
// console.debug('HTTP Switchboard > found and removed non-empty localStorage');
|
|
}
|
|
};
|
|
|
|
// Check with extension whether local storage must be emptied
|
|
// rhill 2014-03-28: we need an exception handler in case 3rd-party access
|
|
// to site data is disabled.
|
|
// https://github.com/gorhill/httpswitchboard/issues/215
|
|
try {
|
|
var hasLocalStorage = window.localStorage && window.localStorage.length;
|
|
var hasSessionStorage = window.sessionStorage && window.sessionStorage.length;
|
|
if ( hasLocalStorage || hasSessionStorage ) {
|
|
localMessager.send({
|
|
what: 'contentScriptHasLocalStorage',
|
|
url: window.location.href
|
|
}, localStorageHandler);
|
|
}
|
|
|
|
// TODO: indexedDB
|
|
if ( window.indexedDB && !!window.indexedDB.webkitGetDatabaseNames ) {
|
|
// var db = window.indexedDB.webkitGetDatabaseNames().onsuccess = function(sender) {
|
|
// console.debug('webkitGetDatabaseNames(): result=%o', sender.target.result);
|
|
// };
|
|
}
|
|
|
|
// TODO: Web SQL
|
|
if ( window.openDatabase ) {
|
|
// Sad:
|
|
// "There is no way to enumerate or delete the databases available for an origin from this API."
|
|
// Ref.: http://www.w3.org/TR/webdatabase/#databases
|
|
}
|
|
}
|
|
catch (e) {
|
|
}
|
|
|
|
/******************************************************************************/
|
|
|
|
})();
|
|
|
|
/******************************************************************************/
|
|
/******************************************************************************/
|
|
|
|
(function() {
|
|
|
|
/******************************************************************************/
|
|
|
|
var nodesAddedHandler = function(nodeList, summary) {
|
|
var i = 0;
|
|
var node, src, text;
|
|
while ( node = nodeList.item(i++) ) {
|
|
if ( node.nodeType !== 1 ) {
|
|
continue;
|
|
}
|
|
if ( typeof node.tagName !== 'string' ) {
|
|
continue;
|
|
}
|
|
|
|
switch ( node.tagName.toUpperCase() ) {
|
|
|
|
case 'SCRIPT':
|
|
// https://github.com/gorhill/httpswitchboard/issues/252
|
|
// Do not count µMatrix's own script tags, they are not required
|
|
// to "unbreak" a web page
|
|
if ( node.id && node.id.indexOf('uMatrix-') === 0 ) {
|
|
break;
|
|
}
|
|
text = node.textContent.trim();
|
|
if ( text !== '' ) {
|
|
summary.scriptSources['{inline_script}'] = true;
|
|
summary.mustReport = true;
|
|
}
|
|
src = (node.src || '').trim();
|
|
if ( src !== '' ) {
|
|
summary.scriptSources[src] = true;
|
|
summary.mustReport = true;
|
|
}
|
|
break;
|
|
|
|
case 'A':
|
|
if ( node.href.indexOf('javascript:') === 0 ) {
|
|
summary.scriptSources['{inline_script}'] = true;
|
|
summary.mustReport = true;
|
|
}
|
|
break;
|
|
|
|
case 'OBJECT':
|
|
src = (node.data || '').trim();
|
|
if ( src !== '' ) {
|
|
summary.pluginSources[src] = true;
|
|
summary.mustReport = true;
|
|
}
|
|
break;
|
|
|
|
case 'EMBED':
|
|
src = (node.src || '').trim();
|
|
if ( src !== '' ) {
|
|
summary.pluginSources[src] = true;
|
|
summary.mustReport = true;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
var nodeListsAddedHandler = function(nodeLists) {
|
|
var i = nodeLists.length;
|
|
if ( i === 0 ) {
|
|
return;
|
|
}
|
|
var summary = {
|
|
what: 'contentScriptSummary',
|
|
locationURL: window.location.href,
|
|
scriptSources: {}, // to avoid duplicates
|
|
pluginSources: {}, // to avoid duplicates
|
|
mustReport: false
|
|
};
|
|
while ( i-- ) {
|
|
nodesAddedHandler(nodeLists[i], summary);
|
|
}
|
|
if ( summary.mustReport ) {
|
|
localMessager.send(summary);
|
|
}
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
(function() {
|
|
var summary = {
|
|
what: 'contentScriptSummary',
|
|
locationURL: window.location.href,
|
|
scriptSources: {}, // to avoid duplicates
|
|
pluginSources: {}, // to avoid duplicates
|
|
mustReport: true
|
|
};
|
|
// https://github.com/gorhill/httpswitchboard/issues/25
|
|
// &
|
|
// Looks for inline javascript also in at least one a[href] element.
|
|
// https://github.com/gorhill/httpswitchboard/issues/131
|
|
nodesAddedHandler(document.querySelectorAll('script, a[href^="javascript:"], object, embed'), summary);
|
|
|
|
//console.debug('contentscript-end.js > firstObservationHandler(): found %d script tags in "%s"', Object.keys(summary.scriptSources).length, window.location.href);
|
|
|
|
localMessager.send(summary);
|
|
})();
|
|
|
|
/******************************************************************************/
|
|
|
|
// Observe changes in the DOM
|
|
|
|
// Added node lists will be cumulated here before being processed
|
|
var addedNodeLists = [];
|
|
var addedNodeListsTimer = null;
|
|
|
|
var treeMutationObservedHandler = function() {
|
|
nodeListsAddedHandler(addedNodeLists);
|
|
addedNodeListsTimer = null;
|
|
addedNodeLists = [];
|
|
};
|
|
|
|
// https://github.com/gorhill/uBlock/issues/205
|
|
// Do not handle added node directly from within mutation observer.
|
|
var treeMutationObservedHandlerAsync = function(mutations) {
|
|
var iMutation = mutations.length;
|
|
var nodeList;
|
|
while ( iMutation-- ) {
|
|
nodeList = mutations[iMutation].addedNodes;
|
|
if ( nodeList.length !== 0 ) {
|
|
addedNodeLists.push(nodeList);
|
|
}
|
|
}
|
|
// I arbitrarily chose 250 ms for now:
|
|
// I have to compromise between the overhead of processing too few
|
|
// nodes too often and the delay of many nodes less often. There is nothing
|
|
// time critical here.
|
|
if ( addedNodeListsTimer === null ) {
|
|
addedNodeListsTimer = setTimeout(treeMutationObservedHandler, 250);
|
|
}
|
|
};
|
|
|
|
// This fixes http://acid3.acidtests.org/
|
|
if ( document.body ) {
|
|
// https://github.com/gorhill/httpswitchboard/issues/176
|
|
var treeObserver = new MutationObserver(treeMutationObservedHandlerAsync);
|
|
treeObserver.observe(document.body, {
|
|
childList: true,
|
|
subtree: true
|
|
});
|
|
}
|
|
|
|
/******************************************************************************/
|
|
|
|
})();
|
|
|
|
/******************************************************************************/
|
|
/******************************************************************************/
|
|
|
|
})();
|