316 lines
10 KiB
JavaScript
316 lines
10 KiB
JavaScript
/**
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* Request Analyzer
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* Belongs to LocalCDN (since 2020-02-26)
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* (Origin: Decentraleyes)
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*
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* @author Thomas Rientjes
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* @since 2016-04-11
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*
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* @author nobody
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* @since 2020-02-26
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*
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* @license MPL 2.0
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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'use strict';
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/**
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* Request Analyzer
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*/
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var requestAnalyzer = {};
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/**
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* Public Methods
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*/
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requestAnalyzer.isValidCandidate = function (requestDetails, tabDetails) {
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let initiatorDomain, requestedDomain, isAllowlisted;
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initiatorDomain = helpers.extractDomainFromUrl(tabDetails.url, true);
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if (initiatorDomain === null) {
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initiatorDomain = Address.EXAMPLE;
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}
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// If requested Domain not in mappings.js it is not relevant
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requestedDomain = helpers.extractDomainFromUrl(requestDetails.url, true);
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if (mappings['cdn'][requestedDomain] === undefined) {
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return false;
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}
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isAllowlisted = helpers.checkAllowlisted(initiatorDomain, requestAnalyzer.allowlistedDomains);
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if (isAllowlisted) {
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return false;
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}
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// Font Awesome injections in Chromium deactivated (https://gitlab.com/nobody42/localcdn/-/issues/67)
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if (!BrowserType.FIREFOX) {
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if (requestDetails.url.includes('font-awesome') || requestDetails.url.includes('fontawesome')) {
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console.warn(`${LogString.PREFIX} ${LogString.FONT_AWESOME}`);
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log.append(tabDetails.url, requestDetails.url, LogString.FONT_AWESOME, true);
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return false;
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}
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}
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// Ignore requests if website is 'yandex.com' and CDN is 'yastatic.net', because website and CDN are the same.
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if (tabDetails.url.includes('yandex.com') && requestDetails.url.includes('yastatic.net')) {
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log.append(tabDetails.url, requestDetails.url, LogString.YANDEX, true);
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return false;
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}
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// Only requests of type GET can be valid candidates.
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return requestDetails.method === WebRequest.GET;
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};
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requestAnalyzer.isGoogleMaterialIcons = function (url) {
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return url.includes('Material+Icons') || url.includes('materialicons');
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};
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requestAnalyzer.isGoogleFont = function (domain) {
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return domain.includes('fonts.googleapis.com') || domain.includes('fonts.gstatic.com');
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};
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requestAnalyzer.getLocalTarget = function (requestDetails, initiator) {
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let destinationUrl, destinationHost, destinationPath, hostMappings, basePath,
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resourceMappings, destinationSearchString;
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destinationSearchString = '';
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destinationUrl = new URL(requestDetails.url);
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destinationHost = destinationUrl.host;
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destinationPath = destinationUrl.pathname;
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if (destinationUrl.search) {
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destinationSearchString = destinationUrl.search;
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}
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// Use the proper mappings for the targeted host.
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hostMappings = mappings.cdn[destinationHost];
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// Resource mapping files are never locally available.
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if (Resource.MAPPING_EXPRESSION.test(destinationPath)) {
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return {
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'result': false,
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};
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}
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basePath = requestAnalyzer._matchBasePath(hostMappings, destinationPath)['result'];
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resourceMappings = hostMappings[basePath];
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if (!resourceMappings) {
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return {
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'result': false,
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};
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}
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// Return either the local target's path or false.
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// eslint-disable-next-line max-len
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return requestAnalyzer._findLocalTarget(
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resourceMappings,
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basePath,
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destinationHost,
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destinationPath,
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destinationSearchString,
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initiator
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);
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};
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/**
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* Private Methods
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*/
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requestAnalyzer._matchBasePath = function (hostMappings, channelPath) {
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for (let basePath of Object.keys(hostMappings)) {
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if (channelPath.startsWith(basePath)) {
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return {
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'result': basePath,
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};
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}
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}
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return {
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'result': false,
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};
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};
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// eslint-disable-next-line max-len
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requestAnalyzer._findLocalTarget = function (resourceMappings, basePath, channelHost, channelPath, destinationSearchString, initiator) {
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let resourcePath, versionNumber, resourcePattern, shorthandResource;
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resourcePath = channelPath.replace(basePath, '');
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// Evaluate first in case of version 'latest' and numerals in resource
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versionNumber = resourcePath.match(Resource.VERSION_EXPRESSION);
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// Handle weird version expressions
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if (!versionNumber && Resource.SINGLE_NUMBER_EXPRESSION.test(channelPath)) {
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versionNumber = channelPath.match(/\d{1,2}/);
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resourcePattern = resourcePath.replaceAll(versionNumber, Resource.VERSION_PLACEHOLDER);
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versionNumber = [`${versionNumber}.0`];
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} else {
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resourcePattern = resourcePath.replaceAll(versionNumber, Resource.VERSION_PLACEHOLDER);
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}
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shorthandResource = shorthands.specialFiles(channelHost, channelPath, destinationSearchString);
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if (shorthandResource['result'] !== false) {
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console.log(`${LogString.PREFIX} ${LogString.REPLACED_RESOURCE} ${shorthandResource.path}`);
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log.append(initiator, channelHost + channelPath, shorthandResource.path, false);
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return shorthandResource;
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}
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if (resourcePattern === undefined) {
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return {
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'result': false,
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};
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}
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for (let resourceMold of Object.keys(resourceMappings)) {
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if (resourcePattern.startsWith(resourceMold)) {
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let targetPath, versionDelivered, versionRequested, bundle;
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targetPath = resourceMappings[resourceMold].path;
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targetPath = targetPath.replaceAll(Resource.VERSION_PLACEHOLDER, versionNumber);
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// Replace the requested version with the latest depending on major version
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versionDelivered = targets.setLastVersion(targetPath, versionNumber);
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if (versionDelivered === '') {
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return {
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'result': false,
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};
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}
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targetPath = targetPath.replaceAll(versionNumber, versionDelivered);
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if (versionNumber === null) {
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versionDelivered = targetPath.match(Resource.VERSION_EXPRESSION).toString();
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versionRequested = 'latest';
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} else {
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versionRequested = versionNumber[0];
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}
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// Get bundle name
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bundle = targets.determineBundle(targetPath);
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if (bundle !== '') {
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targetPath = requestAnalyzer._getPathOfBundle(initiator, channelHost, channelPath, targetPath, bundle);
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}
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if (targetPath['result'] === false) {
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break;
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}
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// Prepare and return a local target.
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return {
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'source': channelHost,
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'versionRequested': versionRequested,
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'versionDelivered': versionDelivered,
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'path': targetPath,
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'bundle': bundle
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};
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}
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}
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if (!IgnoredHost[channelHost]) {
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console.warn(`${LogString.PREFIX} ${LogString.MISSING_RESOURCE} ${channelHost}${channelPath}`);
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log.append(initiator, channelHost + channelPath, '-', true);
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}
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if (Object.keys(mappings.cdn).includes(helpers.extractDomainFromUrl(initiator, true))) {
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return {'result': 'blocked'};
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}
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return {
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'result': false,
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};
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};
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requestAnalyzer._getPathOfBundle = function (initiator, channelHost, channelPath, targetPath, bundle) {
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let filename = channelPath.split('/').pop();
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if (bundle === 'MathJax (Bundle)' && filename !== 'MathJax.js') {
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filename = requestAnalyzer._handleMathJax(channelPath, channelHost, initiator);
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} else if (bundle === 'TinyMCE (Bundle)' && filename !== 'tinymce.min.js') {
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filename = requestAnalyzer._handleTinyMCE(channelPath, channelHost, initiator);
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} else if (bundle === 'DataTables (Bundle)') {
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filename = requestAnalyzer._handleDataTables(filename);
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}
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if (filename === false) {
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return {
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'result': false,
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};
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}
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return helpers.formatFilename(filename.endsWith('.js')
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? `${targetPath + filename}m`
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: targetPath + filename);
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};
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requestAnalyzer._handleMathJax = function (channelPath, channelHost, initiator) {
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let filename = channelPath.replace(Resource.MATHJAX, '');
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if (filename.startsWith('/npm/mathjax@3')) {
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filename = filename.replace('/npm/mathjax@3/', '');
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}
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if (filename === 'config/TeX-AMS_HTML.js') {
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filename = 'config/TeX-AMS_HTML-full.js';
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}
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if (!MathJaxFiles[filename] && !MathJax3Files[filename]) {
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console.warn(`${LogString.PREFIX} ${LogString.MISSING_RESOURCE} ${channelHost + channelPath}`);
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log.append(initiator, channelHost + channelPath, '-', true);
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return false;
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}
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return filename;
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};
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requestAnalyzer._handleDataTables = function (filename) {
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if (!filename.endsWith('.min.js') && filename.endsWith('.js')) {
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return filename.replace('.js', '.min.js');
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} else if (!filename.endsWith('.min.css') && filename.endsWith('.css')) {
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return filename.replace('.css', '.min.css');
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}
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return filename;
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};
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requestAnalyzer._handleTinyMCE = function (channelPath, channelHost, initiator) {
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let filename = channelPath.replace(Resource.TINYMCE, '');
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if (filename.startsWith('plugins/')) {
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console.warn(`${LogString.PREFIX} ${LogString.MISSING_RESOURCE} ${channelHost + channelPath}`);
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log.append(initiator, channelHost + channelPath, '-', true);
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return false;
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}
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return filename;
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};
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requestAnalyzer._applyAllowlistedDomains = function () {
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storageManager.type.get(Setting.ALLOWLISTED_DOMAINS, function (items) {
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requestAnalyzer.allowlistedDomains = items.allowlistedDomains || {};
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});
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};
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requestAnalyzer._applyManipulateDOMDomains = function () {
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storageManager.type.get(Setting.DOMAINS_MANIPULATE_DOM, function (items) {
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requestAnalyzer.domainsManipulateDOM = items.domainsManipulateDOM || {};
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});
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};
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/**
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* Initializations
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*/
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requestAnalyzer.allowlistedDomains = {};
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requestAnalyzer._applyAllowlistedDomains();
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requestAnalyzer.domainsManipulateDOM = {};
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requestAnalyzer._applyManipulateDOMDomains();
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/**
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* Event Handlers
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*/
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chrome.storage.onChanged.addListener(requestAnalyzer._applyAllowlistedDomains);
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chrome.storage.onChanged.addListener(requestAnalyzer._applyManipulateDOMDomains);
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