uBlock/js/traffic.js

138 lines
4.0 KiB
JavaScript

/*******************************************************************************
µBlock - a Chromium browser extension to block 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/uBlock
*/
/* jshint multistr: true */
/* global chrome, µBlock */
/******************************************************************************/
// Start isolation from global scope
µBlock.webRequest = (function() {
/******************************************************************************/
// Intercept and filter web requests according to white and black lists.
var onBeforeRequestHandler = function(details) {
var requestType = details.type;
// console.debug('onBeforeRequestHandler()> "%s": %o', details.url, details);
// Do not block behind the scene requests.
if ( details.tabId < 0 ) {
return;
}
// Never block root main doc.
if ( requestType === 'main_frame' && details.parentFrameId < 0 ) {
return;
}
var µb = µBlock;
var µburi = µb.URI;
var requestURL = µburi.set(details.url).normalizedURI();
var requestScheme = µburi.scheme;
var requestHostname = µburi.hostname;
var requestPath = µburi.path;
// Ignore non-http schemes
if ( requestScheme.indexOf('http') !== 0 ) {
return;
}
// Do not block myself from updating assets
if ( requestType === 'xmlhttprequest' && requestURL.slice(0, µb.projectServerRoot.length) === µb.projectServerRoot ) {
return;
}
// rhill 2013-12-15:
// Try to transpose generic `other` category into something more
// meaningful.
if ( requestType === 'other' ) {
requestType = µb.transposeType(requestType, requestPath);
}
// Lookup the page store associated with this tab id.
var pageStore = µb.pageStoreFromTabId(details.tabId) || {};
var reason = false;
if ( µb.getNetFilteringSwitch(pageStore.pageHostname) ) {
reason = µb.abpFilters.matchString(pageStore, requestURL, requestType, requestHostname);
}
// Block using ABP filters?
pageStore.recordRequest(requestType, requestURL, reason);
// whitelisted?
if ( reason === false ) {
return;
}
// blacklisted
// console.debug('onBeforeRequestHandler()> BLOCK "%s": %o', details.url, details);
// If it's a blacklisted frame, redirect to something harmless.
if ( requestType === 'sub_frame' ) {
return { 'redirectUrl': 'about:blank' };
}
return { 'cancel': true };
};
/******************************************************************************/
chrome.webRequest.onBeforeRequest.addListener(
//function(details) {
// quickProfiler.start('onBeforeRequest');
// var r = onBeforeRequestHandler(details);
// quickProfiler.stop();
// return r;
//},
onBeforeRequestHandler,
{
"urls": [
"http://*/*",
"https://*/*",
],
"types": [
"main_frame",
"sub_frame",
'stylesheet',
"script",
"image",
"object",
"xmlhttprequest",
"other"
]
},
[ "blocking" ]
);
console.log('µBlock> Beginning to intercept net requests at %s', (new Date()).toISOString());
/******************************************************************************/
})();
/******************************************************************************/