This app provides monitoring and information features for the common freifunk user and the technical stuff of a freifunk community.
Code base is taken from a TUM Practical Course project and added here to see if Freifunk Altdorf can use it.
https://www.freifunk-altdorf.de
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279 lines
8.1 KiB
279 lines
8.1 KiB
/** |
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* Copyright (c) 2015-present, Facebook, Inc. |
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* |
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* This source code is licensed under the MIT license found in the |
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* LICENSE file in the root directory of this source tree. |
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* |
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* @providesModule WebSocket |
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* @flow |
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*/ |
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'use strict'; |
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const Blob = require('Blob'); |
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const EventTarget = require('event-target-shim'); |
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const NativeEventEmitter = require('NativeEventEmitter'); |
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const BlobManager = require('BlobManager'); |
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const NativeModules = require('NativeModules'); |
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const Platform = require('Platform'); |
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const WebSocketEvent = require('WebSocketEvent'); |
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/* $FlowFixMe(>=0.54.0 site=react_native_oss) This comment suppresses an error |
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* found when Flow v0.54 was deployed. To see the error delete this comment and |
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* run Flow. */ |
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const base64 = require('base64-js'); |
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const binaryToBase64 = require('binaryToBase64'); |
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const invariant = require('fbjs/lib/invariant'); |
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const {WebSocketModule} = NativeModules; |
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import type EventSubscription from 'EventSubscription'; |
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type ArrayBufferView = |
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| Int8Array |
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| Uint8Array |
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| Uint8ClampedArray |
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| Int16Array |
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| Uint16Array |
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| Int32Array |
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| Uint32Array |
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| Float32Array |
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| Float64Array |
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| DataView |
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type BinaryType = 'blob' | 'arraybuffer' |
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const CONNECTING = 0; |
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const OPEN = 1; |
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const CLOSING = 2; |
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const CLOSED = 3; |
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const CLOSE_NORMAL = 1000; |
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const WEBSOCKET_EVENTS = [ |
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'close', |
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'error', |
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'message', |
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'open', |
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]; |
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let nextWebSocketId = 0; |
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/** |
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* Browser-compatible WebSockets implementation. |
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* |
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* See https://developer.mozilla.org/en-US/docs/Web/API/WebSocket |
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* See https://github.com/websockets/ws |
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*/ |
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class WebSocket extends EventTarget(...WEBSOCKET_EVENTS) { |
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static CONNECTING = CONNECTING; |
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static OPEN = OPEN; |
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static CLOSING = CLOSING; |
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static CLOSED = CLOSED; |
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CONNECTING: number = CONNECTING; |
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OPEN: number = OPEN; |
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CLOSING: number = CLOSING; |
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CLOSED: number = CLOSED; |
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_socketId: number; |
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_eventEmitter: NativeEventEmitter; |
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_subscriptions: Array<EventSubscription>; |
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_binaryType: ?BinaryType; |
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onclose: ?Function; |
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onerror: ?Function; |
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onmessage: ?Function; |
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onopen: ?Function; |
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bufferedAmount: number; |
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extension: ?string; |
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protocol: ?string; |
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readyState: number = CONNECTING; |
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url: ?string; |
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// This module depends on the native `WebSocketModule` module. If you don't include it, |
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// `WebSocket.isAvailable` will return `false`, and WebSocket constructor will throw an error |
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static isAvailable: boolean = !!WebSocketModule; |
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constructor(url: string, protocols: ?string | ?Array<string>, options: ?{headers?: {origin?: string}}) { |
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super(); |
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if (typeof protocols === 'string') { |
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protocols = [protocols]; |
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} |
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const {headers = {}, ...unrecognized} = options || {}; |
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// Preserve deprecated backwards compatibility for the 'origin' option |
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if (unrecognized && typeof unrecognized.origin === 'string') { |
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console.warn('Specifying `origin` as a WebSocket connection option is deprecated. Include it under `headers` instead.'); |
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/* $FlowFixMe(>=0.54.0 site=react_native_fb,react_native_oss) This |
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* comment suppresses an error found when Flow v0.54 was deployed. To see |
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* the error delete this comment and run Flow. */ |
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headers.origin = unrecognized.origin; |
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/* $FlowFixMe(>=0.54.0 site=react_native_fb,react_native_oss) This |
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* comment suppresses an error found when Flow v0.54 was deployed. To see |
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* the error delete this comment and run Flow. */ |
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delete unrecognized.origin; |
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} |
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// Warn about and discard anything else |
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if (Object.keys(unrecognized).length > 0) { |
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console.warn('Unrecognized WebSocket connection option(s) `' + Object.keys(unrecognized).join('`, `') + '`. ' |
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+ 'Did you mean to put these under `headers`?'); |
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} |
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if (!Array.isArray(protocols)) { |
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protocols = null; |
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} |
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if (!WebSocket.isAvailable) { |
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throw new Error('Cannot initialize WebSocket module. ' + |
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'Native module WebSocketModule is missing.'); |
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} |
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this._eventEmitter = new NativeEventEmitter(WebSocketModule); |
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this._socketId = nextWebSocketId++; |
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this._registerEvents(); |
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WebSocketModule.connect(url, protocols, { headers }, this._socketId); |
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} |
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get binaryType(): ?BinaryType { |
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return this._binaryType; |
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} |
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set binaryType(binaryType: BinaryType): void { |
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if (binaryType !== 'blob' && binaryType !== 'arraybuffer') { |
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throw new Error('binaryType must be either \'blob\' or \'arraybuffer\''); |
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} |
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if (this._binaryType === 'blob' || binaryType === 'blob') { |
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invariant(BlobManager.isAvailable, 'Native module BlobModule is required for blob support'); |
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if (binaryType === 'blob') { |
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BlobManager.addWebSocketHandler(this._socketId); |
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} else { |
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BlobManager.removeWebSocketHandler(this._socketId); |
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} |
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} |
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this._binaryType = binaryType; |
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} |
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get binaryType(): ?BinaryType { |
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return this._binaryType; |
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} |
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close(code?: number, reason?: string): void { |
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if (this.readyState === this.CLOSING || |
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this.readyState === this.CLOSED) { |
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return; |
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} |
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this.readyState = this.CLOSING; |
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this._close(code, reason); |
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} |
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send(data: string | ArrayBuffer | ArrayBufferView | Blob): void { |
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if (this.readyState === this.CONNECTING) { |
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throw new Error('INVALID_STATE_ERR'); |
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} |
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if (data instanceof Blob) { |
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invariant(BlobManager.isAvailable, 'Native module BlobModule is required for blob support'); |
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BlobManager.sendOverSocket(data, this._socketId); |
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return; |
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} |
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if (typeof data === 'string') { |
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WebSocketModule.send(data, this._socketId); |
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return; |
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} |
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if (data instanceof ArrayBuffer || ArrayBuffer.isView(data)) { |
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WebSocketModule.sendBinary(binaryToBase64(data), this._socketId); |
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return; |
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} |
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throw new Error('Unsupported data type'); |
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} |
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ping(): void { |
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if (this.readyState === this.CONNECTING) { |
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throw new Error('INVALID_STATE_ERR'); |
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} |
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WebSocketModule.ping(this._socketId); |
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} |
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_close(code?: number, reason?: string): void { |
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if (Platform.OS === 'android') { |
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// See https://developer.mozilla.org/en-US/docs/Web/API/CloseEvent |
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const statusCode = typeof code === 'number' ? code : CLOSE_NORMAL; |
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const closeReason = typeof reason === 'string' ? reason : ''; |
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WebSocketModule.close(statusCode, closeReason, this._socketId); |
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} else { |
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WebSocketModule.close(this._socketId); |
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} |
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if (BlobManager.isAvailable && this._binaryType === 'blob') { |
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BlobManager.removeWebSocketHandler(this._socketId); |
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} |
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} |
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_unregisterEvents(): void { |
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this._subscriptions.forEach(e => e.remove()); |
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this._subscriptions = []; |
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} |
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_registerEvents(): void { |
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this._subscriptions = [ |
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this._eventEmitter.addListener('websocketMessage', ev => { |
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if (ev.id !== this._socketId) { |
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return; |
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} |
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let data = ev.data; |
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switch (ev.type) { |
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case 'binary': |
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data = base64.toByteArray(ev.data).buffer; |
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break; |
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case 'blob': |
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data = BlobManager.createFromOptions(ev.data); |
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break; |
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} |
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this.dispatchEvent(new WebSocketEvent('message', { data })); |
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}), |
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this._eventEmitter.addListener('websocketOpen', ev => { |
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if (ev.id !== this._socketId) { |
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return; |
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} |
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this.readyState = this.OPEN; |
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this.dispatchEvent(new WebSocketEvent('open')); |
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}), |
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this._eventEmitter.addListener('websocketClosed', ev => { |
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if (ev.id !== this._socketId) { |
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return; |
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} |
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this.readyState = this.CLOSED; |
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this.dispatchEvent(new WebSocketEvent('close', { |
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code: ev.code, |
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reason: ev.reason, |
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})); |
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this._unregisterEvents(); |
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this.close(); |
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}), |
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this._eventEmitter.addListener('websocketFailed', ev => { |
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if (ev.id !== this._socketId) { |
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return; |
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} |
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this.readyState = this.CLOSED; |
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this.dispatchEvent(new WebSocketEvent('error', { |
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message: ev.message, |
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})); |
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this.dispatchEvent(new WebSocketEvent('close', { |
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message: ev.message, |
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})); |
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this._unregisterEvents(); |
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this.close(); |
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}) |
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]; |
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} |
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} |
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module.exports = WebSocket;
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