mirror of
https://codeberg.org/nobody/LocalCDN.git
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186 lines
5.6 KiB
JavaScript
186 lines
5.6 KiB
JavaScript
/**
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* Interceptor
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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 2016-04-06
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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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* Interceptor
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*/
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var interceptor = {};
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/**
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* Public Methods
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*/
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interceptor.handleRequest = function (requestDetails, tabIdentifier, tab) {
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let validCandidate, targetDetails, targetDomain, isGoogleFont, isGoogleMaterialIcons, initiatorDomain, isListed;
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if (requestDetails['type'] === WebRequestType.MAIN_FRAME &&
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helpers.checkAllowlisted(
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helpers.extractDomainFromUrl(tab.url, true),
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requestAnalyzer.allowlistedDomains
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)) {
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return {
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'cancel': false
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};
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}
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targetDetails = requestAnalyzer.getLocalTarget(requestDetails, tab.url);
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if (targetDetails['result'] === 'blocked') {
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return {
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'redirectUrl': chrome.runtime.getURL('resources/blocked/index.html')
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};
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}
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stateManager.requests[requestDetails.requestId] = {
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tabIdentifier, targetDetails
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};
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// Block POST, HEAD, PUT, DELETE, TRACE, OPTIONS
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if (BlockedRequestMethods[requestDetails.method]) {
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console.warn(`${LogString.PREFIX} ${LogString.NON_GET_REQUEST_BLOCKED}`);
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log.append(tab.url, requestDetails.url, LogString.NON_GET_REQUEST_BLOCKED, true);
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return {
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'cancel': true
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};
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}
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validCandidate = requestAnalyzer.isValidCandidate(requestDetails, tab);
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if (!validCandidate) {
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return {
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'cancel': false
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};
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}
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if (interceptor._isBadResource(requestDetails.url)) {
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console.log(`${LogString.PREFIX} ${LogString.EVIL_RESOURCE_BLOCKED} ${requestDetails.url}`);
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log.append(tab.url, requestDetails.url, '-', true);
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return {
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'cancel': true
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};
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}
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targetDomain = helpers.extractDomainFromUrl(requestDetails.url, true);
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isGoogleFont = requestAnalyzer.isGoogleFont(targetDomain);
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isGoogleMaterialIcons = requestAnalyzer.isGoogleMaterialIcons(requestDetails.url);
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if (BrowserType.FIREFOX && isGoogleFont && !isGoogleMaterialIcons) {
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initiatorDomain = helpers.extractDomainFromUrl(tab.url, true);
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isListed = helpers.checkAllowlisted(initiatorDomain, interceptor.allowedDomainsGoogleFonts);
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// Check if the website is allowed to load Google Fonts
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if (interceptor.blockGoogleFonts === true && isListed === false) {
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return {
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'redirectUrl': chrome.runtime.getURL('resources/google-fonts-placeholder.css')
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};
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} else if (interceptor.blockGoogleFonts === false || isListed === true) {
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return {
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'cancel': false
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};
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}
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}
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if (targetDetails['result'] === false) {
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if (!IgnoredHost[targetDomain]) {
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++stateManager.tabs[tabIdentifier].missing;
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}
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return interceptor._handleMissingCandidate(requestDetails.url, tabIdentifier);
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}
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console.log(`${LogString.PREFIX} ${LogString.REPLACED_RESOURCE} ${targetDetails.path}`);
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log.append(tab.url, requestDetails.url, targetDetails.path, false);
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return {
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'redirectUrl': chrome.runtime.getURL(targetDetails.path + fileGuard.secret)
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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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interceptor._handleMissingCandidate = function (requestUrl, tabIdentifier) {
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let requestUrlSegments, injectionCount, missingCount;
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if (stateManager.showIconBadge === true) {
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injectionCount = Object.keys(stateManager.tabs[tabIdentifier].injections).length || 0;
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if (stateManager.changeBadgeColorMissingResources === true) {
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missingCount = stateManager.tabs[tabIdentifier].missing || 0;
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if (missingCount > 0 && injectionCount === 0) {
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wrappers.setBadgeText(tabIdentifier, injectionCount);
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wrappers.setBadgeColoring(tabIdentifier, BadgeSettingMissingResource.TYPE);
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}
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} else {
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wrappers.setBadgeText(tabIdentifier, injectionCount);
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}
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}
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if (interceptor.blockMissing === true) {
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return {
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'cancel': true
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};
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}
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requestUrlSegments = new URL(requestUrl);
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if (requestUrlSegments.protocol === Address.HTTP) {
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requestUrlSegments.protocol = Address.HTTPS;
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requestUrl = requestUrlSegments.toString();
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return {
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'redirectUrl': requestUrl
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};
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} else {
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return {
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'cancel': false
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};
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}
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};
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interceptor._handleStorageChanged = function (changes) {
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if (Setting.XHR_TEST_DOMAIN in changes) {
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interceptor.xhrTestDomain = changes.xhrTestDomain.newValue;
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}
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if (Setting.BLOCK_MISSING in changes) {
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interceptor.blockMissing = changes.blockMissing.newValue;
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}
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if (Setting.BLOCK_GOOGLE_FONTS in changes) {
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interceptor.blockGoogleFonts = changes.blockGoogleFonts.newValue;
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}
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if (Setting.ALLOWED_DOMAINS_GOOGLE_FONTS in changes) {
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interceptor.allowedDomainsGoogleFonts = changes.allowedDomainsGoogleFonts.newValue;
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}
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};
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interceptor._isBadResource = function (requestUrl) {
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requestUrl = requestUrl.replace(/(^\w+:|^)\/\//, '');
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return Object.keys(BadResources).filter((path) => requestUrl.startsWith(path)).length !== 0;
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};
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/**
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* Event Handlers
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*/
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chrome.storage.onChanged.addListener(interceptor._handleStorageChanged);
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