LocalCDN-Firefox-Chrome-Brave/core/interceptor.js

172 lines
4.8 KiB
JavaScript

/**
* Interceptor
* Belongs to LocalCDN (since 2020-02-26)
* (Origin: Decentraleyes)
*
* @author Thomas Rientjes
* @since 2016-04-06
*
* @author nobody
* @since 2020-02-26
*
* @license MPL 2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/.
*/
'use strict';
/**
* Interceptor
*/
var interceptor = {};
/**
* Public Methods
*/
interceptor.handleRequest = function (requestDetails, tabIdentifier, tab) {
let validCandidate, targetDetails, targetPath, targetDetailURL;
validCandidate = requestAnalyzer.isValidCandidate(requestDetails, tab);
if (!validCandidate) {
return {
'cancel': false
};
}
targetDetails = requestAnalyzer.getLocalTarget(requestDetails, tab.url);
targetPath = targetDetails.path;
if (Regex.GOOGLE_FONTS.test(requestDetails.url)) {
let initiatorDomain = helpers.extractDomainFromUrl(tab.url, true);
// Check if the website is allowed to load Google Fonts
if (interceptor.blockGoogleFonts === true && !requestAnalyzer.domainsGoogleFonts[initiatorDomain]) {
return {
'cancel': true
};
} else if (interceptor.blockGoogleFonts === false || requestAnalyzer.domainsGoogleFonts[initiatorDomain]) {
return {
'cancel': false
};
}
}
targetDetailURL = helpers.extractDomainFromUrl(requestDetails.url, true);
if (targetDetails === false && !IgnoredHost[targetDetailURL]) {
++stateManager.tabs[tabIdentifier].missing;
}
if (!targetDetails) {
return interceptor._handleMissingCandidate(requestDetails.url, tabIdentifier);
}
stateManager.requests[requestDetails.requestId] = {
tabIdentifier, targetDetails
};
return {
'redirectUrl': chrome.runtime.getURL(targetPath + fileGuard.secret)
};
};
/**
* Private Methods
*/
interceptor._handleMissingCandidate = function (requestUrl, tabIdentifier) {
let requestUrlSegments, injectionCount, missingCount;
if (stateManager.showIconBadge === true) {
injectionCount = Object.keys(stateManager.tabs[tabIdentifier].injections).length || 0;
if (stateManager.changeBadgeColorMissingResources === true) {
missingCount = stateManager.tabs[tabIdentifier].missing || 0;
if (missingCount > 0 && injectionCount === 0) {
wrappers.setBadgeMissing(tabIdentifier, injectionCount);
}
} else {
wrappers.defaultBadge(tabIdentifier, injectionCount);
}
}
if (interceptor.blockMissing === true) {
return {
'cancel': true
};
}
requestUrlSegments = new URL(requestUrl);
if (requestUrlSegments.protocol === Address.HTTP) {
requestUrlSegments.protocol = Address.HTTPS;
requestUrl = requestUrlSegments.toString();
return {
'redirectUrl': requestUrl
};
} else {
return {
'cancel': false
};
}
};
interceptor._handleStorageChanged = function (changes) {
if (Setting.XHR_TEST_DOMAIN in changes) {
interceptor.xhrTestDomain = changes.xhrTestDomain.newValue;
}
if (Setting.BLOCK_MISSING in changes) {
interceptor.blockMissing = changes.blockMissing.newValue;
}
if (Setting.BLOCK_GOOGLE_FONTS in changes) {
interceptor.blockGoogleFonts = changes.blockGoogleFonts.newValue;
}
if (Setting.ALLOWED_DOMAINS_GOOGLE_FONTS in changes) {
interceptor.allowedDomainsGoogleFonts = changes.allowedDomainsGoogleFonts.newValue;
}
};
/**
* Initializations
*/
interceptor.xhrTestDomain = Address.LOCALCDN;
interceptor.blockMissing = false;
interceptor.blockGoogleFonts = true;
interceptor.allowedDomainsGoogleFonts = {};
interceptor.relatedSettings = [];
interceptor.relatedSettings.push(Setting.AMOUNT_INJECTED);
interceptor.relatedSettings.push(Setting.XHR_TEST_DOMAIN);
interceptor.relatedSettings.push(Setting.BLOCK_MISSING);
interceptor.relatedSettings.push(Setting.ALLOWED_DOMAINS_GOOGLE_FONTS);
storageManager.type.get(interceptor.relatedSettings, function (items) {
storageManager.amountInjected = items.amountInjected || 0;
interceptor.xhrTestDomain = items.xhrTestDomain || Address.LOCALCDN;
interceptor.allowedDomainsGoogleFonts = items.allowedDomainsGoogleFonts || {};
interceptor.blockMissing = items.blockMissing === undefined ? false : items.blockMissing;
interceptor.blockGoogleFonts = items.blockGoogleFonts === undefined ? true : items.blockGoogleFonts;
});
/**
* Event Handlers
*/
chrome.storage.onChanged.addListener(interceptor._handleStorageChanged);