Telegram Web K with changes to work inside I2P
https://web.telegram.i2p/
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264 lines
7.5 KiB
264 lines
7.5 KiB
/* |
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* https://github.com/morethanwords/tweb |
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* Copyright (C) 2019-2021 Eduard Kuzmenko |
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* https://github.com/morethanwords/tweb/blob/master/LICENSE |
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*/ |
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// #if MTPROTO_SW |
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import '../mtproto/mtproto.worker'; |
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// #endif |
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import { logger, LogTypes } from '../logger'; |
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import { CACHE_ASSETS_NAME, requestCache } from './cache'; |
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import onStreamFetch from './stream'; |
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import { closeAllNotifications, onPing } from './push'; |
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import CacheStorageController from '../files/cacheStorage'; |
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import { IS_SAFARI } from '../../environment/userAgent'; |
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import ServiceMessagePort, { ServiceDownloadTaskPayload } from './serviceMessagePort'; |
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import listenMessagePort from '../../helpers/listenMessagePort'; |
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import { getWindowClients } from '../../helpers/context'; |
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import { MessageSendPort } from '../mtproto/superMessagePort'; |
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import noop from '../../helpers/noop'; |
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import makeError from '../../helpers/makeError'; |
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export const log = logger('SW', LogTypes.Error | LogTypes.Debug | LogTypes.Log | LogTypes.Warn); |
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const ctx = self as any as ServiceWorkerGlobalScope; |
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// #if !MTPROTO_SW |
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let _mtprotoMessagePort: MessagePort; |
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export const getMtprotoMessagePort = () => _mtprotoMessagePort; |
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const sendMessagePort = (source: MessageSendPort) => { |
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const channel = new MessageChannel(); |
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serviceMessagePort.attachPort(_mtprotoMessagePort = channel.port1); |
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serviceMessagePort.invokeVoid('port', undefined, source, [channel.port2]); |
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}; |
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const sendMessagePortIfNeeded = (source: MessageSendPort) => { |
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if(!connectedWindows.size && !_mtprotoMessagePort) { |
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sendMessagePort(source); |
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} |
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}; |
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const onWindowConnected = (source: WindowClient) => { |
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log('window connected', source.id); |
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if(source.frameType === 'none') { |
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log.warn('maybe a bugged Safari starting window', source.id); |
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return; |
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} |
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sendMessagePortIfNeeded(source); |
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connectedWindows.add(source.id); |
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}; |
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type DownloadType = Uint8Array; |
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type DownloadItem = ServiceDownloadTaskPayload & { |
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transformStream: TransformStream<DownloadType, DownloadType>, |
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readableStream: ReadableStream<DownloadType>, |
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writableStream: WritableStream<DownloadType>, |
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writer: WritableStreamDefaultWriter<DownloadType>, |
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// controller: TransformStreamDefaultController<DownloadType>, |
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// promise: CancellablePromise<void>, |
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used?: boolean |
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}; |
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const downloadMap: Map<string, DownloadItem> = new Map(); |
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const DOWNLOAD_ERROR = makeError('UNKNOWN'); |
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export const serviceMessagePort = new ServiceMessagePort<false>(); |
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serviceMessagePort.addMultipleEventsListeners({ |
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notificationsClear: closeAllNotifications, |
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toggleStorages: ({enabled, clearWrite}) => { |
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CacheStorageController.toggleStorage(enabled, clearWrite); |
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}, |
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pushPing: (payload, source) => { |
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onPing(payload, source); |
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}, |
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hello: (payload, source) => { |
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onWindowConnected(source as any as WindowClient); |
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}, |
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download: (payload) => { |
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const {id} = payload; |
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if(downloadMap.has(id)) { |
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return; |
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} |
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// const writableStrategy = new ByteLengthQueuingStrategy({highWaterMark: 1024 * 1024}); |
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// let controller: TransformStreamDefaultController<DownloadType>; |
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const transformStream = new TransformStream<DownloadType, DownloadType>(/* { |
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start: (_controller) => controller = _controller, |
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}, { |
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highWaterMark: 1, |
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size: (chunk) => chunk.byteLength |
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}, new CountQueuingStrategy({highWaterMark: 4}) */); |
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const {readable, writable} = transformStream; |
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const writer = writable.getWriter(); |
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// const promise = deferredPromise<void>(); |
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// promise.catch(noop).finally(() => { |
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// downloadMap.delete(id); |
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// }); |
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// writer.closed.then(promise.resolve, promise.reject); |
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writer.closed.catch(noop).finally(() => { |
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log.error('closed writer'); |
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downloadMap.delete(id); |
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}); |
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const item: DownloadItem = { |
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...payload, |
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transformStream, |
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readableStream: readable, |
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writableStream: writable, |
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writer, |
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// promise, |
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// controller |
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}; |
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downloadMap.set(id, item); |
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return writer.closed.catch(() => {throw DOWNLOAD_ERROR;}); |
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// return promise; |
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}, |
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downloadChunk: ({id, chunk}) => { |
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const item = downloadMap.get(id); |
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if(!item) { |
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return Promise.reject(); |
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} |
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// return item.controller.enqueue(chunk); |
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return item.writer.write(chunk); |
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}, |
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downloadFinalize: (id) => { |
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const item = downloadMap.get(id); |
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if(!item) { |
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return Promise.reject(); |
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} |
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// item.promise.resolve(); |
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// return item.controller.terminate(); |
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return item.writer.close(); |
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}, |
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downloadCancel: (id) => { |
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const item = downloadMap.get(id); |
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if(!item) { |
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return; |
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} |
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// item.promise.reject(); |
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// return item.controller.error(); |
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return item.writer.abort(); |
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} |
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}); |
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// * service worker can be killed, so won't get 'hello' event |
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getWindowClients().then((windowClients) => { |
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log(`got ${windowClients.length} windows from the start`); |
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windowClients.forEach((windowClient) => { |
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onWindowConnected(windowClient); |
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}); |
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}); |
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let connectedWindows: Set<string> = new Set(); |
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listenMessagePort(serviceMessagePort, undefined, (source) => { |
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const isWindowClient = source instanceof WindowClient; |
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if(!isWindowClient || !connectedWindows.has(source.id)) { |
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return; |
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} |
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log('window disconnected'); |
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connectedWindows.delete(source.id); |
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if(!connectedWindows.size) { |
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log.warn('no windows left'); |
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if(_mtprotoMessagePort) { |
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serviceMessagePort.detachPort(_mtprotoMessagePort); |
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_mtprotoMessagePort = undefined; |
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} |
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if(downloadMap.size) { |
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for(const [id, item] of downloadMap) { |
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item.writer.abort().catch(noop); |
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} |
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} |
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} |
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}); |
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// #endif |
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const onFetch = (event: FetchEvent): void => { |
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// #if !DEBUG |
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if( |
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!IS_SAFARI && |
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event.request.url.indexOf(location.origin + '/') === 0 && |
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event.request.url.match(/\.(js|css|jpe?g|json|wasm|png|mp3|svg|tgs|ico|woff2?|ttf|webmanifest?)(?:\?.*)?$/) |
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) { |
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return event.respondWith(requestCache(event)); |
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} |
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// #endif |
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try { |
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const [, url, scope, params] = /http[:s]+\/\/.*?(\/(.*?)(?:$|\/(.*)$))/.exec(event.request.url) || []; |
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// log.debug('[fetch]:', event); |
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switch(scope) { |
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case 'stream': { |
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onStreamFetch(event, params); |
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break; |
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} |
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case 'download': { |
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const item = downloadMap.get(params); |
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if(!item || item.used) { |
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break; |
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} |
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item.used = true; |
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const response = new Response(item.transformStream.readable, {headers: item.headers}); |
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event.respondWith(response); |
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break; |
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} |
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} |
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} catch(err) { |
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log.error('fetch error', err); |
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event.respondWith(new Response('', { |
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status: 500, |
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statusText: 'Internal Server Error', |
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})); |
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} |
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}; |
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const onChangeState = () => { |
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ctx.onfetch = onFetch; |
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}; |
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ctx.addEventListener('install', (event) => { |
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log('installing'); |
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event.waitUntil(ctx.skipWaiting()); // Activate worker immediately |
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}); |
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ctx.addEventListener('activate', (event) => { |
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log('activating', ctx); |
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event.waitUntil(ctx.caches.delete(CACHE_ASSETS_NAME)); |
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event.waitUntil(ctx.clients.claim()); |
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}); |
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// ctx.onerror = (error) => { |
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// log.error('error:', error); |
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// }; |
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// ctx.onunhandledrejection = (error) => { |
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// log.error('onunhandledrejection:', error); |
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// }; |
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ctx.onoffline = ctx.ononline = onChangeState; |
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onChangeState();
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