mirror of
https://codeberg.org/nobody/LocalCDN.git
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208 lines
7.0 KiB
JavaScript
208 lines
7.0 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, isWhitelisted;
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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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isWhitelisted = requestAnalyzer.whitelistedDomains[initiatorDomain];
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if (isWhitelisted) {
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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.CHROMIUM) {
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if (/(font-awesome|fontawesome)/.test(requestDetails.url)) {
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console.warn('[ LocalCDN ] Font Awesome is not fully supported by your browser.');
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return false;
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} else if (requestDetails.url.startsWith('https://fonts.googleapis.com')) {
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// also valid for Google Material icons
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console.warn('[ LocalCDN ] Google Material Icons are not fully supported by your browser.');
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return false;
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}
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}
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// Disable LocalCDN 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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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.getLocalTarget = function (requestDetails) {
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let destinationUrl, destinationHost, destinationPath, hostMappings, basePath, resourceMappings;
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let 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[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 false;
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}
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basePath = requestAnalyzer._matchBasePath(hostMappings, destinationPath);
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resourceMappings = hostMappings[basePath];
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if (!resourceMappings) {
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return false;
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}
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// Return either the local target's path or false.
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return requestAnalyzer._findLocalTarget(resourceMappings, basePath, destinationHost, destinationPath, destinationSearchString);
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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 basePath;
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}
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}
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return false;
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};
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requestAnalyzer._findLocalTarget = function (resourceMappings, basePath, channelHost, channelPath, destinationSearchString) {
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let resourcePath, versionNumber, resourcePattern, filename, shorthandResource;
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chrome.storage.sync.get(Setting.LOGGING, function (items) {
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requestAnalyzer.logging = items.enableLogging;
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});
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resourcePath = channelPath.replace(basePath, '');
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versionNumber = resourcePath.match(Resource.VERSION_EXPRESSION);
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resourcePattern = resourcePath.replace(versionNumber, Resource.VERSION_PLACEHOLDER);
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shorthandResource = shorthands.specialFiles(channelHost, channelPath, destinationSearchString);
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if (shorthandResource) {
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if (requestAnalyzer.logging) {
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console.log('[ LocalCDN ] Replaced resource: ' + shorthandResource.path);
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}
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return shorthandResource;
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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;
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targetPath = resourceMappings[resourceMold].path;
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targetPath = targetPath.replace(Resource.VERSION_PLACEHOLDER, versionNumber);
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// Replace the requested version with the latest depending on major version
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versionDelivered = helpers.setLastVersion(targetPath, versionNumber).toString();
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targetPath = targetPath.replace(versionNumber, versionDelivered);
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versionRequested = versionNumber === null ? 'latest' : versionNumber[0];
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if (versionNumber === null) {
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versionDelivered = targetPath.match(Resource.VERSION_EXPRESSION).toString();
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}
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// Get bundle name
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let bundle = helpers.determineBundle(channelPath);
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if (bundle !== '') {
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filename = channelPath.split('/').pop();
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targetPath = ( RegExp('.*\.css$').test(filename) ) ? targetPath + filename : targetPath + filename + 'm';
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}
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if (requestAnalyzer.logging) {
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console.log('[ LocalCDN ] Replaced resource: ' + targetPath);
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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 (requestAnalyzer.logging) {
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console.warn('[ LocalCDN ] Missing resource: ' + channelHost + channelPath);
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}
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return false;
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};
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requestAnalyzer._applyWhitelistedDomains = function () {
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chrome.storage.sync.get(Setting.WHITELISTED_DOMAINS, function (items) {
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requestAnalyzer.whitelistedDomains = items.whitelistedDomains || {};
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});
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};
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requestAnalyzer._applyManipulateDOMDomains = function () {
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chrome.storage.sync.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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requestAnalyzer._applyAllowedDomainsGoogleFonts = function () {
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chrome.storage.sync.get(Setting.ALLOWED_DOMAINS_GOOGLE_FONTS, function (items) {
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requestAnalyzer.domainsGoogleFonts = items.allowedDomainsGoogleFonts || {};
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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.whitelistedDomains = {};
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requestAnalyzer._applyWhitelistedDomains();
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requestAnalyzer.domainsManipulateDOM = {};
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requestAnalyzer._applyManipulateDOMDomains();
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requestAnalyzer.domainsGoogleFonts = {};
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requestAnalyzer._applyAllowedDomainsGoogleFonts();
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/**
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* Event Handlers
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*/
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chrome.storage.onChanged.addListener(requestAnalyzer._applyWhitelistedDomains);
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chrome.storage.onChanged.addListener(requestAnalyzer._applyManipulateDOMDomains);
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chrome.storage.onChanged.addListener(requestAnalyzer._applyAllowedDomainsGoogleFonts);
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