mirror of
https://github.com/gorhill/uBlock.git
synced 2024-11-10 17:17:57 +01:00
1470 lines
46 KiB
JavaScript
1470 lines
46 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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/* jshint esnext: true, bitwise: false */
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/* global µBlock */
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/******************************************************************************/
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µBlock.abpFilters = (function(){
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/******************************************************************************/
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// fedcba9876543210
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// | | |
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// | | |
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// | | |
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// | | |
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// | | |
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// | | |
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// | | +---- party [0 - 7]
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// | +---- type [0 - 15]
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// +---- [BlockAction | AllowAction]
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const BlockAction = 0 << 15;
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const AllowAction = 1 << 15;
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const AnyType = 1 << 11;
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const AnyParty = 0 << 8;
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const FirstParty = 1 << 8;
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const ThirdParty = 2 << 8;
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const SpecificParty = 3 << 8;
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const SpecificNotParty = 4 << 8;
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const BlockAnyTypeAnyParty = BlockAction | AnyType | AnyParty;
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const BlockAnyType1stParty = BlockAction | AnyType | FirstParty;
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const BlockAnyType3rdParty = BlockAction | AnyType | ThirdParty;
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const BlockAnyTypeOneParty = BlockAction | AnyType | SpecificParty;
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const BlockAnyTypeOtherParties = BlockAction | AnyType | SpecificNotParty;
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const BlockAnyType = BlockAction | AnyType;
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const BlockAnyParty = BlockAction | AnyParty;
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const BlockOneParty = BlockAction | SpecificParty;
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const BlockOtherParties = BlockAction | SpecificNotParty;
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const AllowAnyTypeAnyParty = AllowAction | AnyType | AnyParty;
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const AllowAnyType1stParty = AllowAction | AnyType | FirstParty;
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const AllowAnyType3rdParty = AllowAction | AnyType | ThirdParty;
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const AllowAnyTypeOneParty = AllowAction | AnyType | SpecificParty;
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const AllowAnyTypeOtherParties = AllowAction | AnyType | SpecificNotParty;
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const AllowAnyType = AllowAction | AnyType;
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const AllowAnyParty = AllowAction | AnyParty;
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const AllowOneParty = AllowAction | SpecificParty;
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const AllowOtherParties = AllowAction | SpecificNotParty;
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var pageHostname = '';
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var reIgnoreEmpty = /^\s+$/;
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var reIgnoreComment = /^\[|^!/;
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var reHostnameRule = /^[0-9a-z][0-9a-z.-]+[0-9a-z]$/;
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var reHostnameToken = /^[0-9a-z]+/g;
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var reGoodToken = /[%0-9a-z]{2,}/g;
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var typeNameToTypeValue = {
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'stylesheet': 2 << 11,
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'image': 3 << 11,
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'object': 4 << 11,
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'script': 5 << 11,
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'xmlhttprequest': 6 << 11,
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'sub_frame': 7 << 11,
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'other': 8 << 11,
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'popup': 9 << 11
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};
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// ABP filters: https://adblockplus.org/en/filters
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// regex tester: http://regex101.com/
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/******************************************************************************/
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/*
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var histogram = function(label, categories) {
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var h = [],
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categoryBucket;
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for ( var k in categories ) {
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if ( categories.hasOwnProperty(k) === false ) {
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continue;
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}
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categoryBucket = categories[k];
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for ( var kk in categoryBucket ) {
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if ( categoryBucket.hasOwnProperty(kk) === false ) {
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continue;
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}
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filterBucket = categoryBucket[kk];
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h.push({
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k: k + ' ' + kk,
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n: filterBucket instanceof FilterBucket ? filterBucket.filters.length : 1
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});
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}
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}
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console.log('Histogram %s', label);
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var total = h.length;
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h.sort(function(a, b) { return b.n - a.n; });
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// Find indices of entries of interest
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var target = 2;
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for ( var i = 0; i < total; i++ ) {
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if ( h[i].n === target ) {
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console.log('\tEntries with only %d filter(s) start at index %s (key = "%s")', target, i, h[i].k);
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target -= 1;
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}
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}
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h = h.slice(0, 50);
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h.forEach(function(v) {
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console.log('\tkey=%s count=%d', v.k, v.n);
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});
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console.log('\tTotal buckets count: %d', total);
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};
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*/
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/*
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var adbProfiler = {
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testCount: 0,
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urlCount: 0,
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dumpEach: 200,
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countUrl: function() {
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this.urlCount += 1;
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if ( (this.urlCount % this.dumpEach) === 0 ) {
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this.dump();
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}
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},
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countTest: function() {
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this.testCount += 1;
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},
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dump: function() {
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console.log('µBlock.adbProfiler> number or filters tested per URL: %d (sample: %d URLs)', this.testCount / this.urlCount, this.urlCount);
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},
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reset: function() {
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this.testCount = 0;
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this.urlCount = 0;
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},
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dummy: 0
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};
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*/
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/*******************************************************************************
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Filters family tree:
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- plain (no wildcard)
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- anywhere
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- no hostname
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- specific hostname
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- specific not hostname
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- anchored at start
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- no hostname
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- specific hostname
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- specific not hostname
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- anchored at end
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- no hostname
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- specific hostname
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- specific not hostname
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- one wildcard
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- anywhere
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- no hostname
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- specific hostname
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- specific not hostname
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- anchored at start
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- no hostname
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- specific hostname
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- specific not hostname
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- anchored at end
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- no hostname
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- specific hostname
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- specific not hostname
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- more than one wildcard
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- anywhere
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- no hostname
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- specific hostname
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- specific not hostname
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- anchored at start
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- no hostname
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- specific hostname
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- specific not hostname
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- anchored at end
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- no hostname
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- specific hostname
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- specific not hostname
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*/
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/******************************************************************************/
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var FilterPlain = function(s, tokenBeg) {
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this.s = s;
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this.tokenBeg = tokenBeg;
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};
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FilterPlain.prototype.match = function(url, tokenBeg) {
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// adbProfiler.countTest();
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return url.substr(tokenBeg - this.tokenBeg, this.s.length) === this.s;
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};
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var FilterPlainHostname = function(s, tokenBeg, hostname) {
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this.s = s;
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this.tokenBeg = tokenBeg;
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this.hostname = hostname;
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};
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FilterPlainHostname.prototype.match = function(url, tokenBeg) {
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// adbProfiler.countTest();
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return pageHostname.slice(-this.hostname.length) === this.hostname &&
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url.substr(tokenBeg - this.tokenBeg, this.s.length) === this.s;
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};
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var FilterPlainNotHostname = function(s, tokenBeg, hostname) {
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this.s = s;
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this.tokenBeg = tokenBeg;
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this.hostname = hostname;
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};
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FilterPlainNotHostname.prototype.match = function(url, tokenBeg) {
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// adbProfiler.countTest();
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return pageHostname.slice(-this.hostname.length) !== this.hostname &&
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url.substr(tokenBeg - this.tokenBeg, this.s.length) === this.s;
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};
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/******************************************************************************/
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var FilterPlainPrefix0 = function(s) {
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this.s = s;
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};
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FilterPlainPrefix0.prototype.match = function(url, tokenBeg) {
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// adbProfiler.countTest();
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return url.substr(tokenBeg, this.s.length) === this.s;
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};
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var FilterPlainPrefix0Hostname = function(s, hostname) {
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this.s = s;
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this.hostname = hostname;
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};
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FilterPlainPrefix0Hostname.prototype.match = function(url, tokenBeg) {
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// adbProfiler.countTest();
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return pageHostname.slice(-this.hostname.length) === this.hostname &&
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url.substr(tokenBeg, this.s.length) === this.s;
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};
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var FilterPlainPrefix0NotHostname = function(s, hostname) {
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this.s = s;
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this.hostname = hostname;
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};
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FilterPlainPrefix0NotHostname.prototype.match = function(url, tokenBeg) {
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// adbProfiler.countTest();
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return pageHostname.slice(-this.hostname.length) !== this.hostname &&
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url.substr(tokenBeg, this.s.length) === this.s;
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};
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/******************************************************************************/
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var FilterPlainPrefix1 = function(s) {
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this.s = s;
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};
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FilterPlainPrefix1.prototype.match = function(url, tokenBeg) {
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// adbProfiler.countTest();
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return url.substr(tokenBeg - 1, this.s.length) === this.s;
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};
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var FilterPlainPrefix1Hostname = function(s, hostname) {
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this.s = s;
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this.hostname = hostname;
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};
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FilterPlainPrefix1Hostname.prototype.match = function(url, tokenBeg) {
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// adbProfiler.countTest();
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return pageHostname.slice(-this.hostname.length) === this.hostname &&
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url.substr(tokenBeg - 1, this.s.length) === this.s;
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};
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var FilterPlainPrefix1NotHostname = function(s, hostname) {
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this.s = s;
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this.hostname = hostname;
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};
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FilterPlainPrefix1NotHostname.prototype.match = function(url, tokenBeg) {
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// adbProfiler.countTest();
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return pageHostname.slice(-this.hostname.length) !== this.hostname &&
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url.substr(tokenBeg - 1, this.s.length) === this.s;
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};
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/******************************************************************************/
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var FilterPlainLeftAnchored = function(s) {
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this.s = s;
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};
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FilterPlainLeftAnchored.prototype.match = function(url) {
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// adbProfiler.countTest();
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return url.slice(0, this.s.length) === this.s;
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};
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var FilterPlainLeftAnchoredHostname = function(s, hostname) {
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this.s = s;
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this.hostname = hostname;
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};
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FilterPlainLeftAnchoredHostname.prototype.match = function(url) {
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// adbProfiler.countTest();
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return pageHostname.slice(-this.hostname.length) === this.hostname &&
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url.slice(0, this.s.length) === this.s;
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};
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var FilterPlainLeftAnchoredNotHostname = function(s, hostname) {
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this.s = s;
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this.hostname = hostname;
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};
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FilterPlainLeftAnchoredNotHostname.prototype.match = function(url) {
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// adbProfiler.countTest();
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return pageHostname.slice(-this.hostname.length) !== this.hostname &&
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url.slice(0, this.s.length) === this.s;
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};
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/******************************************************************************/
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var FilterPlainRightAnchored = function(s) {
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this.s = s;
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};
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FilterPlainRightAnchored.prototype.match = function(url) {
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// adbProfiler.countTest();
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return url.slice(-this.s.length) === this.s;
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};
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var FilterPlainRightAnchoredHostname = function(s, hostname) {
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this.s = s;
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this.hostname = hostname;
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};
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FilterPlainRightAnchoredHostname.prototype.match = function(url) {
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// adbProfiler.countTest();
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return pageHostname.slice(-this.hostname.length) === this.hostname &&
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url.slice(-this.s.length) === this.s;
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};
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var FilterPlainRightAnchoredNotHostname = function(s, hostname) {
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this.s = s;
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this.hostname = hostname;
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};
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FilterPlainRightAnchoredNotHostname.prototype.match = function(url) {
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// adbProfiler.countTest();
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return pageHostname.slice(-this.hostname.length) !== this.hostname &&
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url.slice(-this.s.length) === this.s;
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};
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/******************************************************************************/
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// With a single wildcard, regex is not optimal.
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// See:
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// http://jsperf.com/regexp-vs-indexof-abp-miss/3
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// http://jsperf.com/regexp-vs-indexof-abp-hit/3
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var FilterSingleWildcard = function(s, tokenBeg) {
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this.s = s;
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this.tokenBeg = tokenBeg;
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var wcOffset = s.indexOf('*');
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this.lSegment = s.slice(0, wcOffset);
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this.rSegment = s.slice(wcOffset + 1);
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};
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FilterSingleWildcard.prototype.match = function(url, tokenBeg) {
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// adbProfiler.countTest();
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tokenBeg -= this.tokenBeg;
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return url.substr(tokenBeg, this.lSegment.length) === this.lSegment &&
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url.indexOf(this.rSegment, tokenBeg + this.lSegment.length) > 0;
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};
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var FilterSingleWildcardHostname = function(s, tokenBeg, hostname) {
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this.s = s;
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this.tokenBeg = tokenBeg;
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var wcOffset = s.indexOf('*');
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this.lSegment = s.slice(0, wcOffset);
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this.rSegment = s.slice(wcOffset + 1);
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this.hostname = hostname;
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};
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FilterSingleWildcardHostname.prototype.match = function(url, tokenBeg) {
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// adbProfiler.countTest();
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tokenBeg -= this.tokenBeg;
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return pageHostname.slice(-this.hostname.length) === this.hostname &&
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url.substr(tokenBeg, this.lSegment.length) === this.lSegment &&
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url.indexOf(this.rSegment, tokenBeg + this.lSegment.length) > 0;
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};
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var FilterSingleWildcardNotHostname = function(s, tokenBeg, hostname) {
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this.s = s;
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this.tokenBeg = tokenBeg;
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var wcOffset = s.indexOf('*');
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this.lSegment = s.slice(0, wcOffset);
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this.rSegment = s.slice(wcOffset + 1);
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this.hostname = hostname;
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};
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FilterSingleWildcardNotHostname.prototype.match = function(url, tokenBeg) {
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// adbProfiler.countTest();
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tokenBeg -= this.tokenBeg;
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return pageHostname.slice(-this.hostname.length) !== this.hostname &&
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url.substr(tokenBeg, this.lSegment.length) === this.lSegment &&
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url.indexOf(this.rSegment, tokenBeg + this.lSegment.length) > 0;
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};
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/******************************************************************************/
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var FilterSingleWildcardPrefix0 = function(s) {
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this.s = s;
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var wcOffset = s.indexOf('*');
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this.lSegment = s.slice(0, wcOffset);
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this.rSegment = s.slice(wcOffset + 1);
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};
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FilterSingleWildcardPrefix0.prototype.match = function(url, tokenBeg) {
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// adbProfiler.countTest();
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return url.substr(tokenBeg, this.lSegment.length) === this.lSegment &&
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url.indexOf(this.rSegment, tokenBeg + this.lSegment.length) > 0;
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};
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var FilterSingleWildcardPrefix0Hostname = function(s, hostname) {
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this.s = s;
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var wcOffset = s.indexOf('*');
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this.lSegment = s.slice(0, wcOffset);
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this.rSegment = s.slice(wcOffset + 1);
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this.hostname = hostname;
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};
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FilterSingleWildcardPrefix0Hostname.prototype.match = function(url, tokenBeg) {
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// adbProfiler.countTest();
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return pageHostname.slice(-this.hostname.length) === this.hostname &&
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url.substr(tokenBeg, this.lSegment.length) === this.lSegment &&
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url.indexOf(this.rSegment, tokenBeg + this.lSegment.length) > 0;
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};
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var FilterSingleWildcardPrefix0NotHostname = function(s, hostname) {
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this.s = s;
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var wcOffset = s.indexOf('*');
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this.lSegment = s.slice(0, wcOffset);
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this.rSegment = s.slice(wcOffset + 1);
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this.hostname = hostname;
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};
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FilterSingleWildcardPrefix0NotHostname.prototype.match = function(url, tokenBeg) {
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// adbProfiler.countTest();
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return pageHostname.slice(-this.hostname.length) !== this.hostname &&
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url.substr(tokenBeg, this.lSegment.length) === this.lSegment &&
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url.indexOf(this.rSegment, tokenBeg + this.lSegment.length) > 0;
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};
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/******************************************************************************/
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// With a single wildcard, regex is not optimal.
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// See:
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// http://jsperf.com/regexp-vs-indexof-abp-miss/3
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// http://jsperf.com/regexp-vs-indexof-abp-hit/3
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var FilterSingleWildcardLeftAnchored = function(s) {
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this.s = s;
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var wcOffset = s.indexOf('*');
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this.lSegment = s.slice(0, wcOffset);
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this.rSegment = s.slice(wcOffset + 1);
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};
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FilterSingleWildcardLeftAnchored.prototype.match = function(url) {
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// adbProfiler.countTest();
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return url.slice(0, this.lSegment.length) === this.lSegment &&
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url.indexOf(this.rSegment, this.lSegment.length) > 0;
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};
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var FilterSingleWildcardLeftAnchoredHostname = function(s, hostname) {
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this.s = s;
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var wcOffset = s.indexOf('*');
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this.lSegment = s.slice(0, wcOffset);
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this.rSegment = s.slice(wcOffset + 1);
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this.hostname = hostname;
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};
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FilterSingleWildcardLeftAnchoredHostname.prototype.match = function(url) {
|
|
// adbProfiler.countTest();
|
|
return pageHostname.slice(-this.hostname.length) === this.hostname &&
|
|
url.slice(0, this.lSegment.length) === this.lSegment &&
|
|
url.indexOf(this.rSegment, this.lSegment.length) > 0;
|
|
};
|
|
|
|
var FilterSingleWildcardLeftAnchoredNotHostname = function(s, hostname) {
|
|
this.s = s;
|
|
var wcOffset = s.indexOf('*');
|
|
this.lSegment = s.slice(0, wcOffset);
|
|
this.rSegment = s.slice(wcOffset + 1);
|
|
this.hostname = hostname;
|
|
};
|
|
|
|
FilterSingleWildcardLeftAnchoredNotHostname.prototype.match = function(url) {
|
|
// adbProfiler.countTest();
|
|
return pageHostname.slice(-this.hostname.length) !== this.hostname &&
|
|
url.slice(0, this.lSegment.length) === this.lSegment &&
|
|
url.indexOf(this.rSegment, this.lSegment.length) > 0;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
// With a single wildcard, regex is not optimal.
|
|
// See:
|
|
// http://jsperf.com/regexp-vs-indexof-abp-miss/3
|
|
// http://jsperf.com/regexp-vs-indexof-abp-hit/3
|
|
|
|
var FilterSingleWildcardRightAnchored = function(s) {
|
|
this.s = s;
|
|
var wcOffset = s.indexOf('*');
|
|
this.lSegment = s.slice(0, wcOffset);
|
|
this.rSegment = s.slice(wcOffset + 1);
|
|
};
|
|
|
|
FilterSingleWildcardRightAnchored.prototype.match = function(url) {
|
|
// adbProfiler.countTest();
|
|
return url.slice(-this.rSegment.length) === this.rSegment &&
|
|
url.lastIndexOf(this.lSegment, url.length - this.rSegment.length - this.lSegment.length) >= 0;
|
|
};
|
|
|
|
var FilterSingleWildcardRightAnchoredHostname = function(s, hostname) {
|
|
this.s = s;
|
|
var wcOffset = s.indexOf('*');
|
|
this.lSegment = s.slice(0, wcOffset);
|
|
this.rSegment = s.slice(wcOffset + 1);
|
|
this.hostname = hostname;
|
|
};
|
|
|
|
FilterSingleWildcardRightAnchoredHostname.prototype.match = function(url) {
|
|
// adbProfiler.countTest();
|
|
return pageHostname.slice(-this.hostname.length) === this.hostname &&
|
|
url.slice(-this.rSegment.length) === this.rSegment &&
|
|
url.lastIndexOf(this.lSegment, url.length - this.rSegment.length - this.lSegment.length) >= 0;
|
|
};
|
|
|
|
var FilterSingleWildcardRightAnchoredNotHostname = function(s, hostname) {
|
|
this.s = s;
|
|
var wcOffset = s.indexOf('*');
|
|
this.lSegment = s.slice(0, wcOffset);
|
|
this.rSegment = s.slice(wcOffset + 1);
|
|
this.hostname = hostname;
|
|
};
|
|
|
|
FilterSingleWildcardRightAnchoredNotHostname.prototype.match = function(url) {
|
|
// adbProfiler.countTest();
|
|
return pageHostname.slice(-this.hostname.length) !== this.hostname &&
|
|
url.slice(-this.rSegment.length) === this.rSegment &&
|
|
url.lastIndexOf(this.lSegment, url.length - this.rSegment.length - this.lSegment.length) >= 0;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
// With many wildcards, a regex is best.
|
|
|
|
// Ref: regex escaper taken from:
|
|
// https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions
|
|
// modified for the purpose here.
|
|
|
|
var FilterManyWildcards = function(s, tokenBeg) {
|
|
this.s = s;
|
|
this.tokenBeg = tokenBeg;
|
|
this.re = new RegExp('^' + s.replace(/([.+?^=!:${}()|\[\]\/\\])/g, '\\$1').replace(/\*/g, '.*'));
|
|
};
|
|
|
|
FilterManyWildcards.prototype.match = function(url, tokenBeg) {
|
|
// adbProfiler.countTest();
|
|
return this.re.test(url.slice(tokenBeg - this.tokenBeg));
|
|
};
|
|
|
|
var FilterManyWildcardsHostname = function(s, tokenBeg, hostname) {
|
|
this.s = s;
|
|
this.tokenBeg = tokenBeg;
|
|
this.re = new RegExp('^' + s.replace(/([.+?^=!:${}()|\[\]\/\\])/g, '\\$1').replace(/\*/g, '.*'));
|
|
this.hostname = hostname;
|
|
};
|
|
|
|
FilterManyWildcardsHostname.prototype.match = function(url, tokenBeg) {
|
|
// adbProfiler.countTest();
|
|
return pageHostname.slice(-this.hostname.length) === this.hostname &&
|
|
this.re.test(url.slice(tokenBeg - this.tokenBeg));
|
|
};
|
|
|
|
var FilterManyWildcardsNotHostname = function(s, tokenBeg, hostname) {
|
|
this.s = s;
|
|
this.tokenBeg = tokenBeg;
|
|
this.re = new RegExp('^' + s.replace(/([.+?^=!:${}()|\[\]\/\\])/g, '\\$1').replace(/\*/g, '.*'));
|
|
this.hostname = hostname;
|
|
};
|
|
|
|
FilterManyWildcardsNotHostname.prototype.match = function(url, tokenBeg) {
|
|
// adbProfiler.countTest();
|
|
return pageHostname.slice(-this.hostname.length) !== this.hostname &&
|
|
this.re.test(url.slice(tokenBeg - this.tokenBeg));
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
var makeFilter = function(details, tokenBeg) {
|
|
var s = details.f;
|
|
var wcOffset = s.indexOf('*');
|
|
if ( wcOffset > 0 ) {
|
|
if ( (/\*[^*]\*/).test(s) ) {
|
|
return details.anchor === 0 ? new FilterManyWildcards(s, tokenBeg) : null;
|
|
}
|
|
if ( details.anchor < 0 ) {
|
|
return new FilterSingleWildcardLeftAnchored(s);
|
|
}
|
|
if ( details.anchor > 0 ) {
|
|
return new FilterSingleWildcardRightAnchored(s);
|
|
}
|
|
if ( tokenBeg === 0 ) {
|
|
return new FilterSingleWildcardPrefix0(s);
|
|
}
|
|
return new FilterSingleWildcard(s, tokenBeg);
|
|
}
|
|
if ( details.anchor < 0 ) {
|
|
return new FilterPlainLeftAnchored(s);
|
|
}
|
|
if ( details.anchor > 0 ) {
|
|
return new FilterPlainRightAnchored(s);
|
|
}
|
|
if ( tokenBeg === 0 ) {
|
|
return new FilterPlainPrefix0(s);
|
|
}
|
|
if ( tokenBeg === 1 ) {
|
|
return new FilterPlainPrefix1(s);
|
|
}
|
|
return new FilterPlain(s, tokenBeg);
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
var makeHostnameFilter = function(details, tokenBeg, hostname) {
|
|
var s = details.f;
|
|
var wcOffset = s.indexOf('*');
|
|
if ( wcOffset > 0 ) {
|
|
if ( (/\*[^*]\*/).test(s) ) {
|
|
return details.anchor === 0 ? new FilterManyWildcardsHostname(s, tokenBeg, hostname) : null;
|
|
}
|
|
if ( details.anchor < 0 ) {
|
|
return new FilterSingleWildcardLeftAnchoredHostname(s, hostname);
|
|
}
|
|
if ( details.anchor > 0 ) {
|
|
return new FilterSingleWildcardRightAnchoredHostname(s, hostname);
|
|
}
|
|
if ( tokenBeg === 0 ) {
|
|
return new FilterSingleWildcardPrefix0Hostname(s, hostname);
|
|
}
|
|
return new FilterSingleWildcardHostname(s, tokenBeg, hostname);
|
|
}
|
|
if ( details.anchor < 0 ) {
|
|
return new FilterPlainLeftAnchoredHostname(s, hostname);
|
|
}
|
|
if ( details.anchor > 0 ) {
|
|
return new FilterPlainRightAnchoredHostname(s, hostname);
|
|
}
|
|
if ( tokenBeg === 0 ) {
|
|
return new FilterPlainPrefix0Hostname(s, hostname);
|
|
}
|
|
if ( tokenBeg === 1 ) {
|
|
return new FilterPlainPrefix1Hostname(s, hostname);
|
|
}
|
|
return new FilterPlainHostname(s, tokenBeg, hostname);
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
var makeNotHostnameFilter = function(details, tokenBeg, hostname) {
|
|
var s = details.f;
|
|
var wcOffset = s.indexOf('*');
|
|
if ( wcOffset > 0 ) {
|
|
if ( (/\*[^*]\*/).test(s) ) {
|
|
return details.anchor === 0 ? new FilterManyWildcardsNotHostname(s, tokenBeg, hostname) : null;
|
|
}
|
|
if ( details.anchor < 0 ) {
|
|
return new FilterSingleWildcardLeftAnchoredNotHostname(s, hostname);
|
|
}
|
|
if ( details.anchor > 0 ) {
|
|
return new FilterSingleWildcardRightAnchoredNotHostname(s, hostname);
|
|
}
|
|
if ( tokenBeg === 0 ) {
|
|
return new FilterSingleWildcardPrefix0NotHostname(s, hostname);
|
|
}
|
|
return new FilterSingleWildcardNotHostname(s, tokenBeg, hostname);
|
|
}
|
|
if ( details.anchor < 0 ) {
|
|
return new FilterPlainLeftAnchoredNotHostname(s, hostname);
|
|
}
|
|
if ( details.anchor > 0 ) {
|
|
return new FilterPlainRightAnchoredNotHostname(s, hostname);
|
|
}
|
|
if ( tokenBeg === 0 ) {
|
|
return new FilterPlainPrefix0NotHostname(s, hostname);
|
|
}
|
|
if ( tokenBeg === 1 ) {
|
|
return new FilterPlainPrefix1NotHostname(s, hostname);
|
|
}
|
|
return new FilterPlainNotHostname(s, tokenBeg, hostname);
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
// Given a string, find a good token. Tokens which are too generic, i.e. very
|
|
// common with a high probability of ending up as a miss, are not
|
|
// good. Avoid if possible. This has a *significant* positive impact on
|
|
// performance.
|
|
// These "bad tokens" are collated manually.
|
|
|
|
var badTokens = {
|
|
'com': true,
|
|
'http': true,
|
|
'https': true,
|
|
'images': true,
|
|
'img': true,
|
|
'js': true,
|
|
'net': true,
|
|
'news': true,
|
|
'www': true
|
|
};
|
|
|
|
var findFirstGoodToken = function(s) {
|
|
reGoodToken.lastIndex = 0;
|
|
var matches;
|
|
while ( matches = reGoodToken.exec(s) ) {
|
|
if ( badTokens[matches[0]] === undefined ) {
|
|
return matches;
|
|
}
|
|
}
|
|
// No good token found, just return the first token from left
|
|
reGoodToken.lastIndex = 0;
|
|
return reGoodToken.exec(s);
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
var findHostnameToken = function(s) {
|
|
reHostnameToken.lastIndex = 0;
|
|
return reHostnameToken.exec(s);
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
// Trim leading/trailing char "c"
|
|
|
|
var trimChar = function(s, c) {
|
|
// Remove leading and trailing wildcards
|
|
var pos = 0;
|
|
while ( s.charAt(pos) === c ) {
|
|
pos += 1;
|
|
}
|
|
s = s.slice(pos);
|
|
if ( pos = s.length ) {
|
|
while ( s.charAt(pos-1) === c ) {
|
|
pos -= 1;
|
|
}
|
|
s = s.slice(0, pos);
|
|
}
|
|
return s;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
var FilterParser = function() {
|
|
this.action = BlockAction;
|
|
this.anchor = 0;
|
|
this.domains = [];
|
|
this.elemHiding = false;
|
|
this.f = '';
|
|
this.firstParty = false;
|
|
this.fopts = '';
|
|
this.hostname = false;
|
|
this.hostnames = [];
|
|
this.notDomains = [];
|
|
this.notHostnames = [];
|
|
this.thirdParty = false;
|
|
this.types = [];
|
|
this.unsupported = false;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterParser.prototype.toNormalizedType = {
|
|
'stylesheet': 'stylesheet',
|
|
'image': 'image',
|
|
'object': 'object',
|
|
'object-subrequest': 'object',
|
|
'script': 'script',
|
|
'xmlhttprequest': 'xmlhttprequest',
|
|
'subdocument': 'sub_frame',
|
|
'other': 'other',
|
|
'popup': 'popup'
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterParser.prototype.reset = function() {
|
|
this.action = BlockAction;
|
|
this.anchor = 0;
|
|
this.domains = [];
|
|
this.elemHiding = false;
|
|
this.f = '';
|
|
this.firstParty = false;
|
|
this.fopts = '';
|
|
this.hostname = false;
|
|
this.hostnames = [];
|
|
this.notDomains = [];
|
|
this.notHostnames = [];
|
|
this.thirdParty = false;
|
|
this.types = [];
|
|
this.unsupported = false;
|
|
return this;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterParser.prototype.parseOptType = function(raw, not) {
|
|
var type = this.toNormalizedType[raw];
|
|
if ( not ) {
|
|
for ( var k in typeNameToTypeValue ) {
|
|
if ( k === type ) {
|
|
continue;
|
|
}
|
|
this.types.push(typeNameToTypeValue[k]);
|
|
}
|
|
} else {
|
|
this.types.push(typeNameToTypeValue[type]);
|
|
}
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterParser.prototype.parseOptParty = function(not) {
|
|
if ( not ) {
|
|
this.firstParty = true;
|
|
} else {
|
|
this.thirdParty = true;
|
|
}
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterParser.prototype.parseOptHostnames = function(raw) {
|
|
var µburi = µBlock.URI;
|
|
var hostnames = raw.split('|');
|
|
var hostname, not, domain;
|
|
for ( var i = 0; i < hostnames.length; i++ ) {
|
|
hostname = hostnames[i];
|
|
not = hostname.charAt(0) === '~';
|
|
if ( not ) {
|
|
hostname = hostname.slice(1);
|
|
}
|
|
domain = µburi.domainFromHostname(hostname);
|
|
if ( not ) {
|
|
this.notHostnames.push(hostname);
|
|
this.notDomains.push(domain);
|
|
} else {
|
|
this.hostnames.push(hostname);
|
|
this.domains.push(domain);
|
|
}
|
|
}
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterParser.prototype.parse = function(s) {
|
|
// important!
|
|
this.reset();
|
|
|
|
// element hiding filter?
|
|
if ( s.indexOf('##') >= 0 || s.indexOf('#@') >= 0 ) {
|
|
this.elemHiding = true;
|
|
return this;
|
|
}
|
|
|
|
// block or allow filter?
|
|
if ( s.slice(0, 2) === '@@' ) {
|
|
this.action = AllowAction;
|
|
s = s.slice(2);
|
|
}
|
|
|
|
// hostname anchoring
|
|
if ( s.slice(0, 2) === '||' ) {
|
|
this.hostname = true;
|
|
s = s.slice(2);
|
|
}
|
|
|
|
// left-anchored
|
|
if ( s.charAt(0) === '|' ) {
|
|
this.anchor = -1;
|
|
s = s.slice(1);
|
|
}
|
|
|
|
// options
|
|
var pos = s.indexOf('$');
|
|
if ( pos > 0 ) {
|
|
this.fopts = s.slice(pos + 1);
|
|
s = s.slice(0, pos);
|
|
}
|
|
|
|
// right-anchored
|
|
if ( s.slice(-1) === '|' ) {
|
|
this.anchor = 1;
|
|
s = s.slice(0, -1);
|
|
}
|
|
|
|
// normalize placeholders
|
|
// TODO: transforming `^` into `*` is not a strict interpretation of
|
|
// ABP syntax.
|
|
s = s.replace(/\^/g, '*');
|
|
s = s.replace(/\*\*+/g, '*');
|
|
|
|
// remove leading and trailing wildcards
|
|
this.f = trimChar(s, '*');
|
|
|
|
if ( !this.fopts ) {
|
|
return this;
|
|
}
|
|
|
|
// parse options
|
|
var opts = this.fopts.split(',');
|
|
var opt, not;
|
|
for ( var i = 0; i < opts.length; i++ ) {
|
|
opt = opts[i];
|
|
not = opt.charAt(0) === '~';
|
|
if ( not ) {
|
|
opt = opt.slice(1);
|
|
}
|
|
if ( opt === 'third-party' ) {
|
|
this.parseOptParty(not);
|
|
continue;
|
|
}
|
|
if ( this.toNormalizedType.hasOwnProperty(opt) ) {
|
|
this.parseOptType(opt, not);
|
|
continue;
|
|
}
|
|
if ( opt.slice(0,7) === 'domain=' ) {
|
|
this.parseOptHostnames(opt.slice(7));
|
|
continue;
|
|
}
|
|
if ( opt === 'popup' ) {
|
|
this.parseOptType('popup', not);
|
|
break;
|
|
}
|
|
this.unsupported = true;
|
|
}
|
|
return this;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
/******************************************************************************/
|
|
|
|
var FilterBucket = function(a, b) {
|
|
this.filters = [a, b];
|
|
this.s = '';
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterBucket.prototype.add = function(a) {
|
|
this.filters.push(a);
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterBucket.prototype.match = function(url, tokenBeg) {
|
|
var filters = this.filters;
|
|
var i = filters.length;
|
|
while ( i-- ) {
|
|
if ( filters[i].match(url, tokenBeg) !== false ) {
|
|
this.s = filters[i].s;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
/******************************************************************************/
|
|
|
|
var FilterContainer = function() {
|
|
this.reAnyToken = /[%0-9a-z]+/g;
|
|
this.buckets = new Array(8);
|
|
this.blockedAnyPartyHostnames = new µBlock.LiquidDict();
|
|
this.blocked3rdPartyHostnames = new µBlock.LiquidDict();
|
|
this.filterParser = new FilterParser();
|
|
this.reset();
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
// Reset all, thus reducing to a minimum memory footprint of the context.
|
|
|
|
FilterContainer.prototype.reset = function() {
|
|
this.frozen = false;
|
|
this.processedFilterCount = 0;
|
|
this.acceptedCount = 0;
|
|
this.allowFilterCount = 0;
|
|
this.blockFilterCount = 0;
|
|
this.duplicateCount = 0;
|
|
this.categories = {};
|
|
this.duplicates = {};
|
|
this.blockedAnyPartyHostnames.reset();
|
|
this.blocked3rdPartyHostnames.reset();
|
|
this.filterParser.reset();
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterContainer.prototype.freeze = function() {
|
|
//histogram('allFilters', this.categories);
|
|
this.blockedAnyPartyHostnames.freeze();
|
|
this.blocked3rdPartyHostnames.freeze();
|
|
this.duplicates = {};
|
|
this.filterParser.reset();
|
|
this.frozen = true;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterContainer.prototype.toDomainBits = function(domain) {
|
|
if ( domain === undefined ) {
|
|
return 0;
|
|
}
|
|
var i = domain.length >> 2;
|
|
return (domain.charCodeAt( 0) & 0x01) << 3 |
|
|
(domain.charCodeAt( i) & 0x01) << 2 |
|
|
(domain.charCodeAt( i+i) & 0x01) << 1 |
|
|
(domain.charCodeAt(i+i+i) & 0x01) << 0;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterContainer.prototype.makeCategoryKey = function(category) {
|
|
return String.fromCharCode(category);
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterContainer.prototype.addAnyPartyHostname = function(hostname) {
|
|
if ( this.blockedAnyPartyHostnames.add(hostname) ) {
|
|
this.acceptedCount++;
|
|
this.blockFilterCount++;
|
|
return true;
|
|
}
|
|
this.duplicateCount++;
|
|
return false;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterContainer.prototype.add3rdPartyHostname = function(hostname) {
|
|
if ( this.blocked3rdPartyHostnames.add(hostname) ) {
|
|
this.acceptedCount++;
|
|
this.blockFilterCount++;
|
|
return true;
|
|
}
|
|
this.duplicateCount++;
|
|
return false;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterContainer.prototype.add = function(s) {
|
|
// ORDER OF TESTS IS IMPORTANT!
|
|
|
|
// Ignore empty lines
|
|
if ( reIgnoreEmpty.test(s) ) {
|
|
return false;
|
|
}
|
|
|
|
// Ignore comments
|
|
if ( reIgnoreComment.test(s) ) {
|
|
return false;
|
|
}
|
|
|
|
var parsed = this.filterParser.parse(s);
|
|
|
|
// Ignore element-hiding filters
|
|
if ( parsed.elemHiding ) {
|
|
return false;
|
|
}
|
|
|
|
if ( this.duplicates[s] ) {
|
|
this.duplicateCount++;
|
|
return false;
|
|
}
|
|
this.duplicates[s] = true;
|
|
|
|
this.processedFilterCount += 1;
|
|
|
|
// Ignore rules with other conditions for now
|
|
if ( parsed.unsupported ) {
|
|
// console.log('µBlock> abp-filter.js/FilterContainer.add(): unsupported filter "%s"', s);
|
|
return false;
|
|
}
|
|
|
|
// Ignore optionless hostname rules, these will be taken care of by µBlock.
|
|
if ( parsed.hostname && parsed.fopts === '' && parsed.action === BlockAction && reHostnameRule.test(parsed.f) ) {
|
|
return false;
|
|
}
|
|
|
|
this.acceptedCount += 1;
|
|
|
|
// Pure third-party hostnames, use more efficient liquid dict
|
|
if ( reHostnameRule.test(parsed.f) && parsed.hostname && parsed.action === BlockAction ) {
|
|
if ( parsed.fopts === 'third-party' ) {
|
|
return this.blocked3rdPartyHostnames.add(parsed.f);
|
|
}
|
|
if ( parsed.fopts === '' ) {
|
|
return this.blockedAnyPartyHostnames.add(parsed.f);
|
|
}
|
|
}
|
|
|
|
var r = this.addFilter(parsed);
|
|
if ( r === false ) {
|
|
return false;
|
|
}
|
|
|
|
if ( parsed.action ) {
|
|
this.allowFilterCount += 1;
|
|
} else {
|
|
this.blockFilterCount += 1;
|
|
}
|
|
return true;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterContainer.prototype.addFilter = function(parsed) {
|
|
// TODO: avoid duplicates
|
|
|
|
var matches = parsed.hostname ? findHostnameToken(parsed.f) : findFirstGoodToken(parsed.f);
|
|
if ( !matches || !matches[0].length ) {
|
|
return false;
|
|
}
|
|
var tokenBeg = matches.index;
|
|
var tokenEnd = parsed.hostname ? reHostnameToken.lastIndex : reGoodToken.lastIndex;
|
|
var i, n, filter;
|
|
|
|
if ( parsed.hostnames.length || parsed.notHostnames.length ) {
|
|
n = parsed.hostnames.length;
|
|
for ( i = 0; i < n; i++ ) {
|
|
filter = makeHostnameFilter(parsed, tokenBeg, parsed.hostnames[i]);
|
|
if ( !filter ) {
|
|
return false;
|
|
}
|
|
this.addFilterEntry(
|
|
filter,
|
|
parsed,
|
|
SpecificParty | this.toDomainBits(parsed.domains[i]),
|
|
tokenBeg,
|
|
tokenEnd
|
|
);
|
|
}
|
|
n = parsed.notHostnames.length;
|
|
for ( i = 0; i < n; i++ ) {
|
|
filter = makeNotHostnameFilter(parsed, tokenBeg, parsed.notHostnames[i]);
|
|
if ( !filter ) {
|
|
return false;
|
|
}
|
|
this.addFilterEntry(
|
|
filter,
|
|
parsed,
|
|
SpecificNotParty,
|
|
tokenBeg,
|
|
tokenEnd
|
|
);
|
|
}
|
|
} else {
|
|
filter = makeFilter(parsed, tokenBeg);
|
|
if ( !filter ) {
|
|
return false;
|
|
}
|
|
if ( parsed.firstParty ) {
|
|
this.addFilterEntry(filter, parsed, FirstParty, tokenBeg, tokenEnd);
|
|
} else if ( parsed.thirdParty ) {
|
|
this.addFilterEntry(filter, parsed, ThirdParty, tokenBeg, tokenEnd);
|
|
} else {
|
|
this.addFilterEntry(filter, parsed, AnyParty, tokenBeg, tokenEnd);
|
|
}
|
|
}
|
|
return true;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterContainer.prototype.addFilterEntry = function(filter, parsed, party, tokenBeg, tokenEnd) {
|
|
var s = parsed.f;
|
|
var tokenKey = s.slice(tokenBeg, tokenEnd);
|
|
if ( parsed.types.length === 0 ) {
|
|
this.addToCategory(parsed.action | AnyType | party, tokenKey, filter);
|
|
return;
|
|
}
|
|
var n = parsed.types.length;
|
|
for ( var i = 0; i < n; i++ ) {
|
|
this.addToCategory(parsed.action | parsed.types[i] | party, tokenKey, filter);
|
|
}
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterContainer.prototype.addToCategory = function(category, tokenKey, filter) {
|
|
var categoryKey = this.makeCategoryKey(category);
|
|
var categoryBucket = this.categories[categoryKey];
|
|
if ( !categoryBucket ) {
|
|
categoryBucket = this.categories[categoryKey] = {};
|
|
}
|
|
var filterEntry = categoryBucket[tokenKey];
|
|
if ( filterEntry === undefined ) {
|
|
categoryBucket[tokenKey] = filter;
|
|
return;
|
|
}
|
|
if ( filterEntry instanceof FilterBucket ) {
|
|
filterEntry.add(filter);
|
|
return;
|
|
}
|
|
categoryBucket[tokenKey] = new FilterBucket(filterEntry, filter);
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterContainer.prototype.matchTokens = function(url) {
|
|
var re = this.reAnyToken;
|
|
var matches, beg, token;
|
|
var buckets = this.buckets;
|
|
var bucket0 = buckets[0];
|
|
var bucket1 = buckets[1];
|
|
var bucket2 = buckets[2];
|
|
var bucket3 = buckets[3];
|
|
var bucket4 = buckets[4];
|
|
var bucket5 = buckets[5];
|
|
var bucket6 = buckets[6];
|
|
var bucket7 = buckets[7];
|
|
var f;
|
|
|
|
re.lastIndex = 0;
|
|
while ( matches = re.exec(url) ) {
|
|
beg = matches.index;
|
|
token = url.slice(beg, re.lastIndex);
|
|
if ( bucket0 !== undefined ) {
|
|
f = bucket0[token];
|
|
if ( f !== undefined && f.match(url, beg) !== false ) {
|
|
return f.s;
|
|
}
|
|
}
|
|
if ( bucket1 !== undefined ) {
|
|
f = bucket1[token];
|
|
if ( f !== undefined && f.match(url, beg) !== false ) {
|
|
return f.s;
|
|
}
|
|
}
|
|
if ( bucket2 !== undefined ) {
|
|
f = bucket2[token];
|
|
if ( f !== undefined && f.match(url, beg) !== false ) {
|
|
return f.s;
|
|
}
|
|
}
|
|
if ( bucket3 !== undefined ) {
|
|
f = bucket3[token];
|
|
if ( f !== undefined && f.match(url, beg) !== false ) {
|
|
return f.s;
|
|
}
|
|
}
|
|
if ( bucket4 !== undefined ) {
|
|
f = bucket4[token];
|
|
if ( f !== undefined && f.match(url, beg) !== false ) {
|
|
return f.s;
|
|
}
|
|
}
|
|
if ( bucket5 !== undefined ) {
|
|
f = bucket5[token];
|
|
if ( f !== undefined && f.match(url, beg) !== false ) {
|
|
return f.s;
|
|
}
|
|
}
|
|
if ( bucket6 !== undefined ) {
|
|
f = bucket6[token];
|
|
if ( f !== undefined && f.match(url, beg) !== false ) {
|
|
return f.s;
|
|
}
|
|
}
|
|
if ( bucket7 !== undefined ) {
|
|
f = bucket7[token];
|
|
if ( f !== undefined && f.match(url, beg) !== false ) {
|
|
return f.s;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
// This is where we test filters which have the form:
|
|
//
|
|
// `||www.example.com^`
|
|
//
|
|
// Because LiquidDict is well optimized to deal with plain hostname, we gain
|
|
// reusing it here for these sort of filters rather than using filters
|
|
// specialized to deal with other complex filters.
|
|
|
|
FilterContainer.prototype.matchAnyPartyHostname = function(requestHostname) {
|
|
// Quick test first
|
|
if ( this.blockedAnyPartyHostnames.test(requestHostname) ) {
|
|
return '||' + requestHostname + '^';
|
|
}
|
|
// Check parent hostnames if quick test failed
|
|
var hostnames = µBlock.URI.parentHostnamesFromHostname(requestHostname);
|
|
for ( var i = 0, n = hostnames.length; i < n; i++ ) {
|
|
if ( this.blockedAnyPartyHostnames.test(hostnames[i]) ) {
|
|
return '||' + hostnames[i] + '^';
|
|
}
|
|
}
|
|
return false;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
// This is where we test filters which have the form:
|
|
//
|
|
// `||www.example.com^$third-party`
|
|
//
|
|
// Because LiquidDict is well optimized to deal with plain hostname, we gain
|
|
// reusing it here for these sort of filters rather than using filters
|
|
// specialized to deal with other complex filters.
|
|
|
|
FilterContainer.prototype.match3rdPartyHostname = function(requestHostname) {
|
|
// Quick test first
|
|
if ( this.blocked3rdPartyHostnames.test(requestHostname) ) {
|
|
return '||' + requestHostname + '^$third-party';
|
|
}
|
|
// Check parent hostnames if quick test failed
|
|
var hostnames = µBlock.URI.parentHostnamesFromHostname(requestHostname);
|
|
for ( var i = 0, n = hostnames.length; i < n; i++ ) {
|
|
if ( this.blocked3rdPartyHostnames.test(hostnames[i]) ) {
|
|
return '||' + hostnames[i] + '^$third-party';
|
|
}
|
|
}
|
|
return false;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterContainer.prototype.matchString = function(pageDetails, requestURL, requestType, requestHostname) {
|
|
// adbProfiler.countUrl();
|
|
|
|
// https://github.com/gorhill/httpswitchboard/issues/239
|
|
// Convert url to lower case:
|
|
// `match-case` option not supported, but then, I saw only one
|
|
// occurrence of it in all the supported lists (bulgaria list).
|
|
var url = requestURL.toLowerCase();
|
|
|
|
// The logic here is simple:
|
|
//
|
|
// block = !whitelisted && blacklisted
|
|
// or equivalent
|
|
// allow = whitelisted || !blacklisted
|
|
|
|
// Statistically, hits on a URL in order of likelihood:
|
|
// 1. No hit
|
|
// 2. Hit on a block filter
|
|
// 3. Hit on an allow filter
|
|
//
|
|
// High likelihood of "no hit" means to optimize we need to reduce as much
|
|
// as possible the number of filters to test.
|
|
//
|
|
// Then, because of the order of probabilities, we should test only
|
|
// block filters first, and test allow filters if and only if there is a
|
|
// hit on a block filter. Since there is a high likelihood of no hit,
|
|
// testing allow filter by default is likely wasted work, hence allow
|
|
// filters are tested *only* if there is a (unlikely) hit on a block
|
|
// filter.
|
|
|
|
var pageDomain = pageDetails.pageDomain || '';
|
|
var party = requestHostname.slice(-pageDomain.length) === pageDomain ?
|
|
FirstParty :
|
|
ThirdParty;
|
|
|
|
// Test hostname-based block filters
|
|
var br = this.matchAnyPartyHostname(requestHostname);
|
|
if ( br === false && party === ThirdParty ) {
|
|
br = this.match3rdPartyHostname(requestHostname);
|
|
}
|
|
|
|
// This will be used by hostname-based filters
|
|
pageHostname = pageDetails.pageHostname || '';
|
|
|
|
var domainParty = this.toDomainBits(pageDomain);
|
|
var type = typeNameToTypeValue[requestType];
|
|
var categories = this.categories;
|
|
var buckets = this.buckets;
|
|
|
|
// Test against block filters
|
|
if ( br === false ) {
|
|
buckets[0] = categories[this.makeCategoryKey(BlockAnyTypeAnyParty)];
|
|
buckets[1] = categories[this.makeCategoryKey(BlockAnyType | party)];
|
|
buckets[2] = categories[this.makeCategoryKey(BlockAnyTypeOneParty | domainParty)];
|
|
buckets[3] = categories[this.makeCategoryKey(BlockAnyTypeOtherParties)];
|
|
buckets[4] = categories[this.makeCategoryKey(BlockAnyParty | type)];
|
|
buckets[5] = categories[this.makeCategoryKey(BlockAction | type | party)];
|
|
buckets[6] = categories[this.makeCategoryKey(BlockOneParty | type | domainParty)];
|
|
buckets[7] = categories[this.makeCategoryKey(BlockOtherParties | type)];
|
|
br = this.matchTokens(url);
|
|
}
|
|
|
|
// If there is no block filter, no need to test against allow filters
|
|
if ( br === false ) {
|
|
return false;
|
|
}
|
|
|
|
// Test against allow filters
|
|
buckets[0] = categories[this.makeCategoryKey(AllowAnyTypeAnyParty)];
|
|
buckets[1] = categories[this.makeCategoryKey(AllowAnyType | party)];
|
|
buckets[2] = categories[this.makeCategoryKey(AllowAnyTypeOneParty | domainParty)];
|
|
buckets[3] = categories[this.makeCategoryKey(AllowAnyTypeOtherParties | domainParty)];
|
|
buckets[4] = categories[this.makeCategoryKey(AllowAnyParty | type)];
|
|
buckets[5] = categories[this.makeCategoryKey(AllowAction | type | party)];
|
|
buckets[6] = categories[this.makeCategoryKey(AllowOneParty | type | domainParty)];
|
|
buckets[7] = categories[this.makeCategoryKey(AllowOtherParties | type | domainParty)];
|
|
var ar = this.matchTokens(url);
|
|
if ( ar !== false ) {
|
|
return '@@' + ar;
|
|
}
|
|
|
|
return br;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
FilterContainer.prototype.getFilterCount = function() {
|
|
return this.blockFilterCount + this.allowFilterCount;
|
|
};
|
|
|
|
/******************************************************************************/
|
|
|
|
return new FilterContainer();
|
|
|
|
/******************************************************************************/
|
|
|
|
})();
|