lib/data-handler.js

-/**
- * Data Handler
- * Belongs to Decentraleyes.
- *
- * @author      Thomas Rientjes
- * @since       2014-05-30
- * @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';
-
-/**
- * Imports
- */
-
-var { Cc, Ci } = require('chrome');
-var self = require('sdk/self');
-
-//noinspection JSUnresolvedFunction
-var ioService = Cc['@mozilla.org/network/io-service;1']
-    .getService(Ci.nsIIOService);
-
-/**
- * Absolute resource file paths.
- * @var {object} files
- */
-var files = require('./files');
-
-/**
- * Constants
- */
-
-const DELIVERY_NOTICE = '/**\n * Local delivery by Decentraleyes (' + self.version + ').\n */\n\n';
-
-/**
- * Variables
- */
-
-var resourceData = self.data;
-
-/**
- * Public Methods
- */
-
-function getRedirectionURI(targetPath, characterSet, type) {
-
-    var data, dataURI, redirectionURI;
-
-    data = _loadResource(targetPath);
-    dataURI = _buildDataURI(type, characterSet, data);
-    redirectionURI = ioService.newURI(dataURI, null, null);
-
-    return redirectionURI;
-}
-
-/**
- * Exports
- */
-
-exports.getRedirectionURI = getRedirectionURI;
-
-/**
- * Private Methods
- */
-
-function _loadResource(targetPath) {
-
-    var resource;
-
-    // Find the result inside a static path index.
-    if (!files[targetPath]) {
-        throw new Error('The requested resource is missing.');
-    }
-
-    // Attempt to load resource contents.
-    return resource = resourceData.load(targetPath);
-}
-
-function _buildDataURI(type, characterSet, data) {
-
-    var addNotice, dataURI;
-
-    //noinspection JSUnresolvedVariable
-    addNotice = require('sdk/simple-prefs').prefs.addNotice;
-    dataURI = 'data:' + type + ';charset=' + characterSet + ',';
-
-    // Remove the syntax invalidation character.
-    data = data.substring(1);
-
-    if (!addNotice) {
-        dataURI = dataURI + encodeURIComponent(data);
-    } else {
-        dataURI = dataURI + encodeURIComponent(DELIVERY_NOTICE + data);
-    }
-
-    return dataURI;
-}

lib/interceptor.js

-/**
- * Interceptor
- * Belongs to Decentraleyes.
- *
- * @author      Thomas Rientjes
- * @since       2014-05-30
- * @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';
-
-/**
- * Imports
- */
-
-var { Class } = require('sdk/core/heritage');
-var { Unknown } = require('sdk/platform/xpcom');
-var { Cc, Ci, Cr } = require('chrome');
-
-/**
- * Gets and sets add-on specific preferences.
- * @var {object} simplePreferences
- */
-var simplePreferences = require('sdk/simple-prefs');
-
-/**
- * Retains data across application restarts.
- * @var {object} simpleStorage
- */
-var simpleStorage = require('sdk/simple-storage');
-
-//noinspection JSUnresolvedFunction
-var observerService = Cc['@mozilla.org/observer-service;1']
-    .getService(Ci.nsIObserverService);
-
-var requestAnalyzer = require('./request-analyzer');
-var dataHandler = require('./data-handler');
-
-/**
- * Variables
- */
-
-var preferences = simplePreferences.prefs;
-var storage = simpleStorage.storage;
-
-/**
- * Interceptor Class
- */
-
-var Interceptor = new Class({
-
-    extends: Unknown,
-    interfaces: ['nsIObserver'],
-    topic: 'http-on-modify-request',
-
-    register: function () {
-        observerService.addObserver(this, this.topic, false);
-    },
-
-    unregister: function () {
-        observerService.removeObserver(this, this.topic);
-    },
-
-    /**
-     * Called whenever an HTTP request is made.
-     * @param httpChannel
-     */
-    observe: function (httpChannel) {
-
-        var validCandidate, target, characterSet, redirectionURI;
-
-        // Enable runtime discovery.
-        httpChannel.QueryInterface(Ci.nsIHttpChannel);
-
-        // Determine the validity of the candidate.
-        validCandidate = requestAnalyzer.isValidCandidate(httpChannel);
-
-        if (!validCandidate) {
-            return;
-        }
-
-        // Remove referer header from request.
-        httpChannel.setRequestHeader('Referer', null, false);
-
-        // Convert the original request URI to a local target.
-        target = requestAnalyzer.getLocalTarget(httpChannel.URI.host, httpChannel.URI.path);
-
-        if (!target) {
-            return this.handleMissingCandidate(httpChannel);
-        }
-
-        characterSet = httpChannel.URI.originCharset;
-
-        // Fetch local data and create a redirection URI.
-        try {
-            redirectionURI = dataHandler.getRedirectionURI(target.path, characterSet, target.type);
-        } catch (exception) {
-            return this.handleMissingCandidate(httpChannel);
-        }
-
-        // Fix for reported edge-case issues with specific websites.
-        var initiatorDomain =
-            httpChannel.loadInfo && httpChannel.loadInfo.loadingDocument && httpChannel.loadInfo.loadingDocument.domain ||
-            httpChannel.referrer && httpChannel.referrer.host;
-
-        if (storage.taintedDomains[initiatorDomain] || /yandex\./.test(initiatorDomain)) {
-            return this.handleMissingCandidate(httpChannel);
-        }
-
-        // Redirect the HTTP channel to the the local destination.
-        httpChannel.redirectTo(redirectionURI);
-
-        //noinspection JSUnresolvedVariable
-        preferences.amountInjected++;
-    },
-
-    /**
-     * Called when a valid candidate cannot be injected.
-     * @param httpChannel
-     */
-    handleMissingCandidate: function (httpChannel) {
-
-        //noinspection JSUnresolvedVariable
-        if (preferences.blockMissing) {
-            httpChannel.cancel(Cr.NS_ERROR_NOT_AVAILABLE);
-        }
-    }
-});
-
-/**
- * Exports
- */
-
-module.exports = Interceptor;

lib/load-watcher.js

-/**
- * Load Watcher
- * Belongs to Decentraleyes.
- *
- * @author      Thomas Rientjes
- * @since       2016-02-04
- * @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';
-
-/**
- * Imports
- */
-
-var { Class } = require('sdk/core/heritage');
-var { Unknown, Factory } = require('sdk/platform/xpcom');
-var { Cc, Ci, Cu } = require('chrome');
-
-var xpcom = require('sdk/platform/xpcom');
-
-/**
- * Resource version mappings.
- * @var {object} mappings
- */
-var mappings = require('./mappings');
-
-/**
- * Retains data across application restarts.
- * @var {object} simpleStorage
- */
-var simpleStorage = require('sdk/simple-storage');
-
-//noinspection JSUnresolvedFunction
-var categoryManager = Cc['@mozilla.org/categorymanager;1']
-    .getService(Ci.nsICategoryManager);
-
-/**
- * Constants
- */
-
-const CONTRACT_ID = '@decentraleyes.org/load-watcher;1';
-const SCRIPT_CONTENT_TYPE = Ci.nsIContentPolicy.TYPE_SCRIPT;
-const SCRIPT_ELEMENT = Ci.nsIDOMHTMLScriptElement;
-const REQUEST_ACCEPTATION = Ci.nsIContentPolicy.ACCEPT;
-
-/**
- * Variables
- */
-
-var storage = simpleStorage.storage;
-
-/**
- * Tainted domains that are not automatically detectable.
- * @var {object} undetectableTaintedDomains
- */
-var undetectableTaintedDomains = {
-
-    'identi.ca': true,
-    'minigames.mail.ru': true,
-    'passport.twitch.tv': true,
-    'ya.ru': true,
-    'yadi.sk': true
-};
-
-/**
- * Initializations
- */
-
-Object.extend = function (destination, source) {
-
-    for (var property in source) {
-
-        if (source.hasOwnProperty(property)) {
-            destination[property] = source[property];
-        }
-    }
-
-    return destination;
-};
-
-storage.taintedDomains = storage.taintedDomains || {};
-storage.taintedDomains = Object.extend(storage.taintedDomains, undetectableTaintedDomains);
-
-/**
- * Load Watcher Class
- */
-
-var LoadWatcher = new Class({
-
-    extends: Unknown,
-    interfaces: ['nsIContentPolicy'],
-    get wrappedJSObject() {
-        return this
-    },
-
-    register: function () {
-
-        categoryManager.deleteCategoryEntry('content-policy', CONTRACT_ID, false);
-        categoryManager.addCategoryEntry('content-policy', CONTRACT_ID, CONTRACT_ID, false, true);
-    },
-
-    shouldLoad: function (contentType, contentLocation, requestOrigin, node) {
-
-        if (contentType == SCRIPT_CONTENT_TYPE && mappings[contentLocation.host]) {
-
-            if (node instanceof SCRIPT_ELEMENT) {
-
-                if (node.hasAttribute('crossorigin') || node.hasAttribute('integrity')) {
-
-                    // Add corresponding origin domain to the list of tainted domains.
-                    storage.taintedDomains[requestOrigin.host] = true;
-                }
-            }
-        }
-
-        // Accept the resource load request.
-        return REQUEST_ACCEPTATION;
-    }
-});
-
-/**
- * Load Watcher Factory
- */
-
-var factory = Factory({
-
-    contract: CONTRACT_ID,
-    Component: LoadWatcher,
-    unregister: false
-});
-
-/**
- * Unregister
- */
-
-var unload = require('sdk/system/unload');
-
-unload.when(function () {
-
-    function trueUnregister() {
-
-        categoryManager.deleteCategoryEntry('content-policy', CONTRACT_ID, false);
-
-        try {
-            xpcom.unregister(factory);
-        } catch (exception) {
-            Cu.reportError(exception);
-        }
-    }
-
-    if ('dispatch' in Cu) {
-        Cu.dispatch(trueUnregister, trueUnregister);
-    } else {
-        Cu.import('resource://gre/modules/Services.jsm');
-        Services.tm.mainThread.dispatch(trueUnregister, 0);
-    }
-});
-
-/**
- * Exports
- */
-
-module.exports = LoadWatcher;

lib/main.js

-/**
- * Entry Point
- * Belongs to Decentraleyes.
- *
- * @author      Thomas Rientjes
- * @since       2014-05-30
- * @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';
-
-/**
- * Imports
- */
-
-var Interceptor = require('./interceptor');
-var LoadWatcher = require('./load-watcher');
-
-var preferences = require('sdk/simple-prefs').prefs;
-var self = require('sdk/self');
-var tabs = require("sdk/tabs");
-
-/**
- * Main
- */
-
-var interceptor = new Interceptor();
-var loadWatcher = new LoadWatcher();
-
-var featurelessVersions = {
-
-    '1.3.7': true
-};
-
-// Executed as soon as the add-on is loaded.
-exports.main = function (options) {
-
-    // Initialize add-on state.
-    interceptor.register();
-    loadWatcher.register();
-
-    if (preferences.showReleaseNotes) {
-
-        if (options.loadReason === 'install' || (options.loadReason === 'upgrade' && !featurelessVersions[self.version])) {
-
-            if (preferences['sdk.baseURI']) {
-                tabs.open(preferences['sdk.baseURI'] + 'static/release-notes.html');
-            }
-        }
-    }
-};
-
-// Executed as soon as the add-on is unloaded.
-exports.onUnload = function () {
-
-    // Clean up add-on state.
-    interceptor.unregister();
-};