mirror of
https://github.com/anticensority/runet-censorship-bypass.git
synced 2024-11-24 10:23:43 +03:00
362 lines
11 KiB
JavaScript
Executable File
362 lines
11 KiB
JavaScript
Executable File
'use strict';
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/*
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Task 1. Gets IP for host proxy.antizapret.prostovpn.org with dns-lg.com.
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This IP is used in block-informer to inform user when proxy is ON.
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Task 2. Downloads PAC proxy script from Antizapret and sets it in Chromium settings.
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Task 3. Schedules tasks 1 & 2 for every 2 hours.
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*/
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/*
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In background scripts use window.antiCensorRu public variables.
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Thay are synced with chrome.storage so they persist restarts.
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In pages window.antiCensorRu are not accessible,
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use chrome.runtime.getBackgroundPage(..),
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avoid old extension.getBackgroundPage.
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*/
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window.antiCensorRu = {
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// PUBLIC
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version: chrome.runtime.getManifest().version,
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pacProviders: {
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Антизапрет: {
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pacUrl: 'http://antizapret.prostovpn.org/proxy.pac',
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proxyHosts: ['proxy.antizapret.prostovpn.org'],
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proxyIps: {
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'195.154.110.37': 'proxy.antizapret.prostovpn.org'
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}
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},
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Антиценз: {
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pacUrl: 'https://config.anticenz.org/proxy.pac',
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proxyHosts: ['gw2.anticenz.org'],
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proxyIps: {
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'5.196.220.114': 'gw2.anticenz.org'
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}
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},
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Оба_и_на_свитчах: {
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pacUrl: 'https://drive.google.com/uc?export=download&id=0B-ZCVSvuNWf0akpCOURNS2VCTmc',
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proxyHosts: ['gw2.anticenz.org', 'proxy.antizapret.prostovpn.org'],
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proxyIps: {
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'5.196.220.114': 'gw2.anticenz.org',
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'195.154.110.37': 'proxy.antizapret.prostovpn.org'
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}
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}
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},
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_currentPacProviderKey: 'Оба_и_на_свитчах',
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get currentPacProviderKey() { return this._currentPacProviderKey },
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set currentPacProviderKey(newKey) {
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if (newKey && !this.pacProviders[newKey])
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throw new IllegalArgumentException('No provider for key:'+newKey);
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this._currentPacProviderKey = newKey;
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},
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get pacProvider() { return this.pacProviders[this.currentPacProviderKey] },
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/*
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Is it the first time extension installed? Do something, e.g. initiate PAC sync.
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*/
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ifFirstInstall: false,
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lastPacUpdateStamp: 0,
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// PROTECTED
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_periodicUpdateAlarmReason: 'Периодичное обновление PAC-скрипта Антизапрет',
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pushToStorage(cb) {
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// Copy only settable properties.
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var onlySettable = {};
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for(var key of Object.keys(this))
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if (Object.getOwnPropertyDescriptor(this, key).writable && typeof(this[key]) !== 'function')
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onlySettable[key] = this[key]
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return chrome.storage.local.clear(
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() => chrome.storage.local.set(
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onlySettable,
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() => cb && cb(chrome.runtime.lastError, onlySettable)
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)
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);
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},
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pullFromStorage(cb) {
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chrome.storage.local.get(null, storage => {
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console.log('In storage:', storage);
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for(var key of Object.keys(storage))
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this[key] = storage[key];
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console.log('Synced with storage, any callback?', !!cb);
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if (cb)
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cb(chrome.runtime.lastError, storage);
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});
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},
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migrateStorage(cb) {
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chrome.storage.local.get(null, oldStorage => {
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var getPubCounter = version => parseInt( version.match(/\d+$/)[0] );
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var version = oldStorage.version || '0.0.0.0';
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var oldPubCounter = getPubCounter( version );
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if (oldPubCounter > 9) {
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console.log('No migration required, storage pub', oldPubCounter, 'is up to date.');
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return cb && cb(chrome.runtime.lastError, oldStorage);
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}
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console.log('Starting storage migration from publication', oldPubCounter, 'to', getPubCounter( this.version ));
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this._currentPacProviderKey = oldStorage._currentPacProviderKey;
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this.lastPacUpdateStamp = oldStorage.lastPacUpdateStamp;
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// There is no need to persist other properties in the storage.
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return this.pushToStorage(cb);
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/*
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History of Changes to Storage
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-----------------------------
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Version 0.0.0.10
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* Added this.version
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* PacProvider.proxyIps changed from {ip -> Boolean} to {ip -> hostname}
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Version 0.0.0.8-9
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* Changed storage.ifNotInstalled to storage.ifFirstInstall
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* Added storage.lastPacUpdateStamp
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**/
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});
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},
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syncWithPacProvider(cb) {
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var cb = cb || (() => {});
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var pacSetPromise = new Promise(
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(resolve, reject) => setPacScriptFromProvider(
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this.pacProvider,
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(err, res) => {
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if (err)
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return reject(err);
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this.lastPacUpdateStamp = Date.now();
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this.ifFirstInstall = false;
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return resolve(res);
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}
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)
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);
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return updatePacProxyIps(
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this.pacProvider,
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ipsError => {
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if (ipsError && ipsError.clarification)
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ipsError.clarification.ifNotCritical = true;
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pacSetPromise.then(
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res => this.pushToStorage(
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pushError => pushError ? cb(pushError) : cb(ipsError, res)
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),
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err => cb(err)
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)
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}
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);
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},
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installPac(key, cb) {
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if(typeof(key) === 'function') {
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cb = key;
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key = undefined;
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}
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if(key)
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this.currentPacProviderKey = key;
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var cb = asyncLogGroup('Installing PAC...', cb);
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chrome.alarms.clear(
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this._periodicUpdateAlarmReason,
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() => chrome.alarms.create(
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this._periodicUpdateAlarmReason,
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{ periodInMinutes: 4*60 }
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)
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);
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this.syncWithPacProvider(cb);
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},
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clearPac(cb) {
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var cb = asyncLogGroup('Cearing alarms and PAC...', cb);
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chrome.alarms.clearAll(
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() => chrome.proxy.settings.clear(
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{},
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() => {
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this.currentPacProviderKey = undefined;
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return this.pushToStorage(cb);
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}
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)
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);
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}
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};
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// ON EACH LAUNCH OF EXTENSION
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// Not only on Chrome's startUp, but aslo on Enable/Disable
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window.storageSyncedPromise = new Promise(
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(resolve, reject) => {
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/* We have to migrate on each launch, because:
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1. There is no way to check that chrome.runtime.onInstalled wasn't fired except timeout.
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2. There is no way to schedule onInstalled before pullFromStorage without timeouts.
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3. So inside onInstalled storage may only be already pulled.
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*/
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window.antiCensorRu.migrateStorage(
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(err, migratedStorage) =>
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err ? reject(err) : window.antiCensorRu.pullFromStorage(
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(err, res) => err ? reject(err) : resolve(res)
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)
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);
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}
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);
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window.storageSyncedPromise.then(
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storage => {
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chrome.alarms.onAlarm.addListener(
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alarm => {
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if (alarm.name === window.antiCensorRu._periodicUpdateAlarmReason) {
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console.log('Periodic update triggered:', new Date());
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window.antiCensorRu.syncWithPacProvider();
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}
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}
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);
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console.log('Alarm listener installed. We won\'t miss any PAC update.');
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chrome.alarms.get(
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window.antiCensorRu._periodicUpdateAlarmReason,
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alarm => alarm && console.log(
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'Next update is scheduled on', new Date(alarm.scheduledTime).toLocaleString('ru-RU')
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)
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);
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}
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);
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chrome.runtime.onInstalled.addListener( installDetails => {
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console.log('Extension just installed, reason:', installDetails.reason);
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window.storageSyncedPromise.then(
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storage => {
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switch(installDetails.reason) {
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case 'update':
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console.log('Update or reload. Do nothing.');
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break;
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case 'install':
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window.antiCensorRu.ifFirstInstall = true;
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chrome.runtime.openOptionsPage();
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}
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}
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)
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});
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// PRIVATE
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function asyncLogGroup() {
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var args = [].slice.apply(arguments);
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var cb = args.pop();
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console.group.apply(console, args);
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return function() {
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console.log('Finished');
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console.groupEnd();
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var _cb = cb || (() => {});
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return _cb.apply(this, arguments);
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}
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}
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function ifSuccessfulCode(status) {
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return status >= 200 && status < 300 || status === 304;
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}
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function httpGet(url, cb) {
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var cb = cb || (() => {});
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var req = new XMLHttpRequest();
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var ifAsync = true;
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req.open('GET', url, ifAsync);
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req.onload = event => {
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if ( !ifSuccessfulCode(req.status) ) {
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req.clarification = {message: 'Получен ответ с неудачным HTTP-кодом '+req.status+ '.'};
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return cb(req);
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}
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console.log('GETed with success.');
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return cb(null, req.responseText)
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};
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req.onerror = event => { event.clarification = {message: 'Что-то не так с сетью, проверьте соединение.'}; return cb(event); };
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req.send();
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}
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function updatePacProxyIps(provider, cb) {
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if (!provider.proxyHosts) {
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console.log(provider+' has no proxies defined.');
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return cb(null, null);
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}
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var cb = asyncLogGroup('Getting IP for '+ provider.proxyHosts.join(', ') +'...', cb);
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var failure = {
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clarification: {message:'Не удалось получить один или несколько IP адресов для прокси-серверов. Иконка для уведомления об обходе блокировок может не отображаться.'},
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errors: {}
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};
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var i = 0;
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for (var proxyHost of provider.proxyHosts) {
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httpGet(
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'http://www.dns-lg.com/google1/'+ proxyHost +'/A',
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(err, res) => {
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if (!err) {
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provider.proxyIps = provider.proxyIps || {};
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provider.proxyIps[ JSON.parse(res).answer[0].rdata ] = proxyHost;
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} else
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failure.errors[proxyHost] = err;
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if ( ++i == provider.proxyHosts.length ) {
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failure = Object.keys(failure.errors).length ? failure : null;
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return cb(failure, provider.proxyIps);
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}
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}
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);
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}
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}
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function setPacScriptFromProvider(provider, cb) {
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var cb = asyncLogGroup('Getting pac script from provider...', provider.pacUrl, cb);
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httpGet(
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provider.pacUrl,
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(err, res) => {
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if (err) {
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err.clarification = {
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message: 'Не удалось скачать PAC-скрипт с адреса: ' +provider.pacUrl+ '.',
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prev: err.clarification
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};
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return cb(err);
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}
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console.log('Clearing chrome proxy settings...');
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return chrome.proxy.settings.clear({}, () => {
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var config = {
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mode: 'pac_script',
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pacScript: {
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mandatory: false,
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data: res
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}
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};
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console.log('Setting chrome proxy settings...');
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chrome.proxy.settings.set( {value: config}, cb );
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});
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}
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);
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}
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