mirror of
https://github.com/gorhill/uBlock.git
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137 lines
4.1 KiB
JavaScript
137 lines
4.1 KiB
JavaScript
/*******************************************************************************
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µBlock - a Chromium browser extension to block 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/uBlock
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*/
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/* global chrome, µBlock */
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/******************************************************************************/
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// Start isolation from global scope
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µBlock.webRequest = (function() {
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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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//console.debug('onBeforeRequestHandler()> "%s": %o', details.url, details);
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// Do not block behind the scene requests.
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var tabId = details.tabId;
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if ( tabId < 0 ) {
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return;
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}
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var µb = µBlock;
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var requestType = details.type;
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// Never block root main doc.
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if ( requestType === 'main_frame' && details.parentFrameId < 0 ) {
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µb.bindTabToPageStats(tabId, details.url);
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return;
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}
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var requestURL = details.url;
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var µburi = µb.URI.set(details.url);
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// Ignore non-http schemes
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var requestScheme = µburi.scheme;
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if ( requestScheme.indexOf('http') !== 0 ) {
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return;
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}
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var requestHostname = µburi.hostname;
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var requestPath = µburi.path;
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// rhill 2013-12-15:
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// Try to transpose generic `other` category into something more
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// meaningful.
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if ( requestType === 'other' ) {
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requestType = µb.transposeType(requestType, requestPath);
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}
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// Lookup the page store associated with this tab id.
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var pageStore = µb.pageStoreFromTabId(tabId);
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if ( !pageStore ) {
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return;
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}
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var reason = false;
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if ( µb.getNetFilteringSwitch(pageStore.pageHostname) ) {
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//quickProfiler.start('abpFilters.matchString');
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reason = µb.abpFilters.matchString(pageStore, requestURL, requestType, requestHostname);
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//quickProfiler.stop();
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}
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// Record what happened.
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pageStore.recordRequest(requestType, requestURL, reason);
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// Not blocked?
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if ( reason === false ) {
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return;
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}
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// Blocked
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//console.debug('µBlock> onBeforeRequestHandler()> BLOCK "%s" because "%s"', details.url, reason);
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// https://github.com/gorhill/uBlock/issues/18
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// Do not use redirection, we need to block outright to be sure the request
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// will not be made. There can be no such guarantee with redirection.
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return { 'cancel': true };
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};
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/******************************************************************************/
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chrome.webRequest.onBeforeRequest.addListener(
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//function(details) {
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// quickProfiler.start('onBeforeRequest');
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// var r = onBeforeRequestHandler(details);
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// quickProfiler.stop();
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// return r;
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//},
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onBeforeRequestHandler,
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{
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"urls": [
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"http://*/*",
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"https://*/*",
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],
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"types": [
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"main_frame",
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"sub_frame",
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'stylesheet',
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"script",
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"image",
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"object",
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"xmlhttprequest",
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"other"
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]
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},
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[ "blocking" ]
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);
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console.log('µBlock> Beginning to intercept net requests at %s', (new Date()).toISOString());
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/******************************************************************************/
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})();
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/******************************************************************************/
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