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| 1 | +import { Connection } from "home-assistant-js-websocket" |
| 2 | +import { HOMEASSISTANT } from "../config" |
| 3 | + |
| 4 | +import { |
| 5 | + ERR_INVALID_AUTH, |
| 6 | + ERR_CANNOT_CONNECT, |
| 7 | +} from "home-assistant-js-websocket/dist/errors.js"; |
| 8 | +import type { Error } from "home-assistant-js-websocket"; |
| 9 | +import * as messages from "home-assistant-js-websocket/dist/messages.js"; |
| 10 | +import { atLeastHaVersion } from "home-assistant-js-websocket/dist/util.js"; |
| 11 | + |
| 12 | +const DEBUG = true; |
| 13 | + |
| 14 | +export const MSG_TYPE_AUTH_REQUIRED = "auth_required"; |
| 15 | +export const MSG_TYPE_AUTH_INVALID = "auth_invalid"; |
| 16 | +export const MSG_TYPE_AUTH_OK = "auth_ok"; |
| 17 | + |
| 18 | +export interface HaWebSocket extends WebSocket { |
| 19 | + haVersion: string; |
| 20 | +} |
| 21 | + |
| 22 | +const getWSUrl = () => { |
| 23 | + const url = new URL(HOMEASSISTANT.url) |
| 24 | + url.protocol = url.protocol === 'https:' ? 'wss:' : 'ws:' |
| 25 | + url.pathname = '/core/websocket' |
| 26 | + return url.toString() |
| 27 | +} |
| 28 | + |
| 29 | +export function createSocket(): Promise<HaWebSocket> { |
| 30 | + // Convert from http:// -> ws://, https:// -> wss:// |
| 31 | + const url = getWSUrl(); |
| 32 | + |
| 33 | + if (DEBUG) { |
| 34 | + console.log("[Auth phase] Initializing", url); |
| 35 | + } |
| 36 | + |
| 37 | + function connect( |
| 38 | + triesLeft: number, |
| 39 | + promResolve: (socket: HaWebSocket) => void, |
| 40 | + promReject: (err: Error) => void, |
| 41 | + ) { |
| 42 | + if (DEBUG) { |
| 43 | + console.log("[Auth phase] New connection", url); |
| 44 | + } |
| 45 | + |
| 46 | + const socket = new WebSocket(url) as HaWebSocket; |
| 47 | + |
| 48 | + // If invalid auth, we will not try to reconnect. |
| 49 | + let invalidAuth = false; |
| 50 | + |
| 51 | + const closeMessage = () => { |
| 52 | + // If we are in error handler make sure close handler doesn't also fire. |
| 53 | + socket.removeEventListener("close", closeMessage); |
| 54 | + if (invalidAuth) { |
| 55 | + promReject(ERR_INVALID_AUTH); |
| 56 | + return; |
| 57 | + } |
| 58 | + |
| 59 | + // Reject if we no longer have to retry |
| 60 | + if (triesLeft === 0) { |
| 61 | + // We never were connected and will not retry |
| 62 | + promReject(ERR_CANNOT_CONNECT); |
| 63 | + return; |
| 64 | + } |
| 65 | + |
| 66 | + const newTries = triesLeft === -1 ? -1 : triesLeft - 1; |
| 67 | + // Try again in a second |
| 68 | + setTimeout(() => connect(newTries, promResolve, promReject), 1000); |
| 69 | + }; |
| 70 | + |
| 71 | + // Auth is mandatory, so we can send the auth message right away. |
| 72 | + const handleOpen = async (event: MessageEventInit) => { |
| 73 | + try { |
| 74 | + socket.send(JSON.stringify({ |
| 75 | + ...messages.auth(HOMEASSISTANT.token), |
| 76 | + api_password: HOMEASSISTANT.token |
| 77 | + })); |
| 78 | + } catch (err) { |
| 79 | + // Refresh token failed |
| 80 | + invalidAuth = err === ERR_INVALID_AUTH; |
| 81 | + socket.close(); |
| 82 | + } |
| 83 | + }; |
| 84 | + |
| 85 | + const handleMessage = async (event: MessageEvent) => { |
| 86 | + const message = JSON.parse(event.data); |
| 87 | + |
| 88 | + if (DEBUG) { |
| 89 | + console.log("[Auth phase] Received", message); |
| 90 | + } |
| 91 | + switch (message.type) { |
| 92 | + case MSG_TYPE_AUTH_INVALID: |
| 93 | + invalidAuth = true; |
| 94 | + socket.close(); |
| 95 | + break; |
| 96 | + |
| 97 | + case MSG_TYPE_AUTH_OK: |
| 98 | + socket.removeEventListener("open", handleOpen); |
| 99 | + socket.removeEventListener("message", handleMessage); |
| 100 | + socket.removeEventListener("close", closeMessage); |
| 101 | + socket.removeEventListener("error", closeMessage); |
| 102 | + socket.haVersion = message.ha_version; |
| 103 | + if (atLeastHaVersion(socket.haVersion, 2022, 9)) { |
| 104 | + socket.send(JSON.stringify(messages.supportedFeatures())); |
| 105 | + } |
| 106 | + |
| 107 | + promResolve(socket); |
| 108 | + break; |
| 109 | + |
| 110 | + default: |
| 111 | + if (DEBUG) { |
| 112 | + // We already send response to this message when socket opens |
| 113 | + if (message.type !== MSG_TYPE_AUTH_REQUIRED) { |
| 114 | + console.warn("[Auth phase] Unhandled message", message); |
| 115 | + } |
| 116 | + } |
| 117 | + } |
| 118 | + }; |
| 119 | + |
| 120 | + socket.addEventListener("open", handleOpen); |
| 121 | + socket.addEventListener("message", handleMessage); |
| 122 | + socket.addEventListener("close", closeMessage); |
| 123 | + socket.addEventListener("error", closeMessage); |
| 124 | + } |
| 125 | + |
| 126 | + return new Promise((resolve, reject) => |
| 127 | + connect(3, resolve, reject), |
| 128 | + ); |
| 129 | +} |
| 130 | + |
| 131 | +export const createConnectionFromHassio = async () => { |
| 132 | + return new Connection(await createSocket(), { |
| 133 | + createSocket, |
| 134 | + setupRetry: 3 |
| 135 | + }) |
| 136 | +} |
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