mirror of
https://github.com/anticensority/runet-censorship-bypass.git
synced 2024-11-27 20:03:45 +03:00
543 lines
16 KiB
JavaScript
Executable File
543 lines
16 KiB
JavaScript
Executable File
'use strict';
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/*
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Task 1. Gets IPs for proxies of antizapret/anticenz via dns over https.
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These IPs are used in block-informer to inform user when proxy is ON.
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Task 2. Downloads PAC proxy script from antizapret/anticenz/my Google Drive and sets it in Chromium settings.
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Task 3. Schedules tasks 1 & 2 for every 4 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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In pages window.antiCensorRu is not accessible,
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use chrome.runtime.getBackgroundPage(..),
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extension.getBackgroundPage is deprecated
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*/
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window.antiCensorRu = {
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version: chrome.runtime.getManifest().version,
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pacProviders: {
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Антизапрет: {
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pacUrl: 'https://antizapret.prostovpn.org/proxy.pac',
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proxyHosts: ['proxy.antizapret.prostovpn.org'],
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proxyIps: {
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'195.123.209.38': 'proxy.antizapret.prostovpn.org',
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'2a02:27ac::10': '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', // 0.14
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pacUrl: 'https://drive.google.com/uc?export=download&id=0B-ZCVSvuNWf0bzNUR2F4RF8wOU0', // 0.15
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proxyHosts: ['proxy.antizapret.prostovpn.org', 'gw2.anticenz.org'],
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proxyIps: {
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'195.123.209.38': 'proxy.antizapret.prostovpn.org',
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'2a02:27ac::10': 'proxy.antizapret.prostovpn.org',
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'5.196.220.114': 'gw2.anticenz.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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_periodicUpdateAlarmReason: 'Периодичное обновление PAC-скрипта Антизапрет',
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pushToStorage(cb) {
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console.log('Pushing to storage...');
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// Copy only settable properties (except functions).
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const onlySettable = {};
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for(const 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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}
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}
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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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chromified(cb, 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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const err = checkChromeError();
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if (!err) {
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console.log('Pulled from storage:', storage);
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for(const key of Object.keys(storage)) {
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this[key] = storage[key];
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}
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}
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console.log('Synced with storage, any callback?', !!cb);
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return cb && cb(err, storage);
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});
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},
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syncWithPacProvider(cb) {
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cb = asyncLogGroup('Syncing with PAC provider...', cb);
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if (!this.pacProvider) {
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return cb({clarification:{message:'Сперва выберите PAC-провайдера.'}});
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}
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const 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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this.lastPacUpdateStamp = Date.now();
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this.ifFirstInstall = false;
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this.setAlarms();
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}
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return resolve([err, res]);
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}
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)
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);
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const ipsPromise = new Promise(
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(resolve, reject) => 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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}
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return resolve([ipsError]);
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}
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)
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);
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Promise.all([pacSetPromise, ipsPromise]).then(
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([[pacErr, pacRes], [ipsErr]]) => {
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if (pacErr && ipsErr) {
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return cb(pacErr, pacRes);
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}
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return cb(pacErr || ipsErr);
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this.pushToStorage(
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(pushErr) => cb(pacErr || ipsErr || pushErr, pacRes)
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);
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}
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);
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},
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_pacUpdatePeriodInMinutes: 4*60,
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setAlarms() {
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let nextUpdateMoment = this.lastPacUpdateStamp + this._pacUpdatePeriodInMinutes*60*1000;
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const now = Date.now();
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if (nextUpdateMoment < now)
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nextUpdateMoment = now;
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console.log( 'Next PAC update is scheduled on', new Date(nextUpdateMoment).toLocaleString('ru-RU') );
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chrome.alarms.create(
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this._periodicUpdateAlarmReason,
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{
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when: nextUpdateMoment,
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periodInMinutes: this._pacUpdatePeriodInMinutes
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}
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);
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return nextUpdateMoment === now; // ifAlarmTriggered. May be changed in the future.
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},
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installPac(key, cb) {
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console.log('Installing PAC');
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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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}
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return this.syncWithPacProvider(cb);
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},
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clearPac(cb) {
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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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const err = checkChromeError();
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if (err) {
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return cb(err);
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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, STARTUP, RELOAD, UPDATE, ENABLE
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chrome.storage.local.get(null, (oldStorage) => {
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console.log('Init on storage:', oldStorage);
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antiCensorRu.ifFirstInstall = Object.keys(oldStorage).length === 0;
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if (!antiCensorRu.ifFirstInstall) {
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// LAUNCH, RELOAD, UPDATE
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antiCensorRu._currentPacProviderKey = oldStorage._currentPacProviderKey;
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antiCensorRu.lastPacUpdateStamp = oldStorage.lastPacUpdateStamp || antiCensorRu.lastPacUpdateStamp;
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console.log( 'Last PAC update was on', new Date(antiCensorRu.lastPacUpdateStamp).toLocaleString('ru-RU') );
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}
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chrome.alarms.onAlarm.addListener(
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(alarm) => {
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if (alarm.name === antiCensorRu._periodicUpdateAlarmReason) {
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console.log('Periodic PAC update triggered:', new Date().toLocaleString('ru-RU'));
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antiCensorRu.syncWithPacProvider(/* Swallows errors. */);
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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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window.addEventListener('online', () => {
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console.log('We are online, checking periodic updates...');
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antiCensorRu.setAlarms();
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});
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if (antiCensorRu.ifFirstInstall) {
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// INSTALL
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console.log('Installing...');
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return chrome.runtime.openOptionsPage();
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}
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if (!antiCensorRu.pacProvider) {
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return console.log('No PAC provider set. Do nothing.');
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}
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/*
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1. There is no way to check that chrome.runtime.onInstalled wasn't fired except timeout.
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Otherwise we could put storage migration code only there.
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2. We have to check storage for migration before using it.
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Better on each launch then on each pull.
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*/
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const ifAlarmTriggered = antiCensorRu.setAlarms();
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if (antiCensorRu.version === oldStorage.version) {
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// LAUNCH, RELOAD, ENABLE
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antiCensorRu.pacProviders = oldStorage.pacProviders;
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return console.log('Extension launched, reloaded or enabled.');
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}
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// UPDATE & MIGRATION
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console.log('Extension updated.');
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if (!ifAlarmTriggered) {
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updatePacProxyIps(
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antiCensorRu.pacProvider,
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(ipsError) => ipsError ? console.error('Error updating IPs:', ipsError) : antiCensorRu.pushToStorage(/* Swallows errors. */)
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);
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}
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/*
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History of Changes to Storage (Migration Guide)
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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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function asyncLogGroup(...args) {
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const cb = args.pop() || (() => {});
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console.group.apply(console, args);
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return function(...cbArgs) {
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console.groupEnd();
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console.log('Group finished.');
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return cb.apply(this, cbArgs);
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}
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}
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function checkChromeError(betterStack) {
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// Chrome API calls your cb in a context different from the point of API method invokation.
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const err = chrome.runtime.lastError || chrome.extension.lastError || null;
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if (err) {
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const args = ['API returned error:', err];
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if (betterStack) {
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args.push('\n' + betterStack);
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}
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console.warn.apply(console, args);
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}
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return err;
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}
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function chromified(cb, ...replaceArgs) {
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const stack = (new Error()).stack;
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// Take error first callback and covert it to chrome api callback.
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return function(...args) {
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if (replaceArgs.length) {
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args = replaceArgs;
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}
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const err = checkChromeError(stack);
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return cb && cb.call(this, err, ...args);
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};
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}
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function httpGet(url, cb) {
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const start = Date.now();
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return fetch(url).then(
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(res) => {
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const textCb =
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(err) => cb && res.text()
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.then( (text) => cb(err, text), cb );
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const status = res.status;
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if ( !( status >= 200 && status < 300 || status === 304 ) ) {
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res.clarification = {message: 'Получен ответ с неудачным HTTP-кодом ' + status + '.'};
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return textCb(res);
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}
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console.log('GETed with success:', url, Date.now() - start);
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return textCb();
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},
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(err) => {
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err.clarification = {message: 'Что-то не так с сетью, проверьте соединение.'};
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return cb && cb(err);
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}
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);
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}
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function getOneDnsRecord(args, cb) {
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// args: { host:..., type: 'AAAA', filter: ['AAAA'] }
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if (!(args.host && args.type && cb)) {
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throw new Error('Wrong args:' + host + ',' + type);
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}
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const type2str = {
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// https://en.wikipedia.org/wiki/List_of_DNS_record_types
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// A, AAAA may be localized (github, e.g.), but you may use ANY
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1: 'A', // IPv4
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28: 'AAAA', // IPv6
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2: 'NS',
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5: 'CNAME', // Synonyms, returned by server together with A/AAAA.
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255: 'ANY' // Deprecated on some servers, not recommended
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};
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httpGet(
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'https://dns.google.com/resolve?type=' + args.type + '&name=' + args.host,
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(err, res) => {
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if (res) {
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try {
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res = JSON.parse(res);
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console.log('Json parsed.');
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if (err || res.Status) {
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const msg = ['Answer', 'Comment', 'Status']
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.filter( (prop) => res[ prop ] )
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.map( (prop) => prop + ': ' + JSON.stringify( res[ prop ] ) )
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.join(', \n');
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err.clarification.message += ' Сервер (json): ' + msg;
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err.data = err.data || res;
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}
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else {
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res = res.Answer || [];
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for (const record of res) {
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record.type = type2str[ record.type ];
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}
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if ( args.filter ) {
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res = res.filter( (record) => args.filter.indexOf( record.type ) > -1 );
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}
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}
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}
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catch(e) {
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err = e || err || {clarification:{message:''}};
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err.clarification = err.clarification || { message: '' };
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err.clarification.message += ' Сервер (текст): '+ res;
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err.clarification.message.trim();
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err.data = err.data || res;
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}
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}
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return cb( err, res );
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}
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);
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};
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function getDnsRecords(args, cb) {
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/*
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Example of input:
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{
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// Required
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host: 'proxy.navalny.cia.gov',
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// Optional
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types: {
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string: ['A', 'AAAA'], // <- Default. Makes one request per each type.
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filter: ['A', 'AAAA'], // <- Default. E.g., you want to get rid of CNAME type from response.
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}
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}
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Exmple of answer from google:
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"Answer":
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[
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{
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"name": "apple.com.", // Always matches name in the Question section
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"type": 1, // A - Standard DNS RR type
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"TTL": 3599, // Record's time-to-live in seconds
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"data": "17.178.96.59" // Data for A - IP address as text
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},
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...
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Exmple of output:
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The same as google, but types _may be_ canonical strings ('AAAA', 'A')
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**/
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if ( !args.host.length ) {
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throw new Error('args.host is required: ' + args.host);
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}
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args.types = Object.assign({
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string: ['A', 'AAAA'],
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filter: ['A', 'AAAA']
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}, args.types);
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const promises = args.types.string.map(
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(type) => new Promise( (resolve, reject) =>
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getOneDnsRecord({ host: args.host, type: type, filter: args.types.filter }, (err, res) => err ? reject(err) : resolve(res) )
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)
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);
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Promise.all(promises).then( (answers) => cb( null, [].concat.apply([], answers) ), cb );
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}
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const getIpDnsRecords = (host, cb) => getDnsRecords({ host: host }, cb);
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function updatePacProxyIps(provider, cb) {
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cb = asyncLogGroup('Getting IP for '+ provider.proxyHosts.join(', ') +'...', cb);
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let 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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let i = 0;
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provider.proxyHosts.map(
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(proxyHost) => getIpDnsRecords(
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proxyHost,
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(err, records) => {
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if (!err) {
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provider.proxyIps = provider.proxyIps || {};
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records.forEach( (ans) => provider.proxyIps[ ans.data ] = proxyHost );
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}
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else {
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failure.errors[proxyHost] = err;
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}
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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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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, pacData) => {
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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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const config = {
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mode: 'pac_script',
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pacScript: {
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mandatory: false,
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data: pacData
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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}, chromified(cb) );
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}
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);
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}
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window.addEventListener('error', (err) => {
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console.error('Global error');
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});
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window.addEventListener('unhandledrejection', (event) => {
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console.warn('Unhandled rejection. Throwing error.');
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event.preventDefault();
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throw event.reason;
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});
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