API support for channel change
This commit is contained in:
david
parent
a83a5fa605
commit
358f9c8784
6
dvb_channel.conf
Normal file
6
dvb_channel.conf
Normal file
@ -0,0 +1,6 @@
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ION:521028615:8VSB:49:52:3
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KATU:533028615:8VSB:49:52:3
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KOIN-HD:539028615:8VSB:49:52:3
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KGW:545028615:8VSB:49:52:3
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KBLN-DT:575028615:8VSB:49:52:1
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TBN HD:581028615:8VSB:49:52:3
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10
package.json
10
package.json
@ -5,9 +5,13 @@
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"ws": "^8.18.0"
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},
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"scripts": {
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"build": "npx tsc --skipLibCheck --outDir dist src/server.ts",
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"build:scss": "npx sass src/static/css:dist/static/css",
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"copy:html": "cp src/static/index.html dist/static",
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"build:js:fe": "npx tsc src/static/js/*.ts --outDir dist/static/js",
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"build:js:be": "npx tsc --skipLibCheck src/*.ts --outDir dist",
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"build": "npm run build:js:fe && npm run build:js:be && npm run build:scss && npm run copy:html",
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"start": "npm run build && node dist/server.js",
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"debug": "npx ts-node src/server.ts"
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"dev": "npm run build && npx ts-node src/server.ts"
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},
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"devDependencies": {
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"@types/node": "^22.10.2",
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@ -15,4 +19,4 @@
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"ts-node": "^10.9.2",
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"typescript": "^5.8.2"
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}
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}
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}
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47
src/http.ts
47
src/http.ts
@ -8,20 +8,45 @@ export default class HttpServer {
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private httpServer: http.Server;
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private port: number;
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private root: string;
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public constructor(port: number, root : string) {
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public constructor(port: number, root: string, tune: (ch: string, adp?: number) => void) {
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this.port = port;
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this.root = root;
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this.httpServer = http.createServer((req, res) => {
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const filePath = path.join(root, req.url === "/" ? "index.html" : req.url || "");
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fs.readFile(filePath, (err, data) => {
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if (err) {
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res.writeHead(404);
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res.end("Not Found");
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} else {
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res.writeHead(200);
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res.end(data);
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let status: number = 404;
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let body: any;
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const url = new URL(req.url, `http://${req.headers.host}`);
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const pathname = path.normalize(url.pathname);
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if (req.method === 'GET') {
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const filePath = path.join(root, path.extname(pathname) === '' ? pathname + "/index.html" : pathname);
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try {
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body = fs.readFileSync(filePath);
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status = 200;
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}
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});
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catch (err) {
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body = "Invalid File"
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}
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}
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else if (req.method === 'PUT' && pathname.startsWith('/api/')) {
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const query = pathname.split('/');
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const api = query[2];
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switch (api) {
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case "channel":
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const channel = query[3];
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const adapter = parseInt(url.searchParams.get('adapter'));
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tune(channel, adapter);
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break;
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default:
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body = "Invalid API Endpoint"
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break;
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}
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}
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else {
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body = "Invalid Request"
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}
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res.writeHead(status);
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res.end(body);
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});
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}
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public start() {
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@ -34,5 +59,7 @@ export default class HttpServer {
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}
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@ -1,15 +1,51 @@
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import HttpServer from './http';
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import TVWebSocket from './ws';
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import Zap, { IZap } from './zap';
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const HTTP_PORT = process.env.HTTP_PORT ? parseInt(process.env.HTTP_PORT,10) : 8080;
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import * as readline from 'readline';
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const HTTP_PORT = process.env.HTTP_PORT ? parseInt(process.env.HTTP_PORT, 10) : 8080;
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const WS_PORT = process.env.WS_PORT ? parseInt(process.env.WS_PORT, 10) : 3001;
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const STATIC_ROOT = process.cwd() + "/dist/static";;
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const STATIC_ROOT = process.cwd() + "/dist/static";
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const TV_DEV_0 = process.env.TV_DEV_0 ?? '/dev/dvb/adapter0/dvr0'
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const TV_DEV_1 = process.env.TV_DEV_1 ? '/dev/dvb/adapter0/dvr1' : null;
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const httpServer = new HttpServer(HTTP_PORT, STATIC_ROOT);
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const zap = new Zap();
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const tune = (reqChannel: string, reqAdapter?: number) => {
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const adapter = reqAdapter === 0 || reqAdapter === 1 ? reqAdapter : 0;
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zap.zapTo(reqChannel, adapter).then((zap: IZap) => {
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console.log(`Tuned ${zap.adapter} to ${zap.channel}`)
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}).catch((err: Error) => {
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console.error(err.message);
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});
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}
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const httpServer = new HttpServer(HTTP_PORT, STATIC_ROOT, tune);
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const tvWebSocket = new TVWebSocket(WS_PORT);
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httpServer.start();
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process.stdin.setEncoding("utf8");
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process.stdin.resume();
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console.log("Enter Channel Name:");
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process.stdin.on("data", async (data: string) => {
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const input = data.trim();
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console.log(`Received: "${input}"`);
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await zap.zapTo(input).then((zap: IZap) => {
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console.log(`Tuned ${zap.adapter} to ${zap.channel}`)
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}).catch((err: Error) => {
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console.error(err.message);
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});
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});
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127
src/zap.ts
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127
src/zap.ts
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@ -0,0 +1,127 @@
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import { spawn, ChildProcessWithoutNullStreams } from "child_process";
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import * as fs from "fs";
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export interface IZap {
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process: ChildProcessWithoutNullStreams | null,
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channel: string,
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adapter: 0 | 1
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}
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export default class Zap {
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private zap0: IZap;
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private zap1: IZap;
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private channelNameList: string[];
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private fileName: string;
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public constructor(fileName = "dvb_channel.conf", channel = "ION") {
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const zap0: IZap = {
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process: null,
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channel,
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adapter: 0
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}
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const zap1: IZap = {
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process: null,
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channel,
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adapter: 1
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}
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this.zap0 = zap0;
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this.zap1 = zap1;
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const file = fs.readFileSync('./' + fileName, "utf-8");
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const lines = file.split("\n").map(line => line.trim()).filter(line => line && !line.startsWith("#")).map(line => line.split(":")[0]);
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this.channelNameList = lines;
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this.fileName = fileName;
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}
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private nextChannel(channel: string) {
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const size = this.channelNameList.length;
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const currentIndex = this.channelNameList.indexOf(channel);
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if (currentIndex >= 0) {
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return this.channelNameList[this.mod(currentIndex + 1, size)];
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}
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else {
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return channel;
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}
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}
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private mod(n: number, m: number) {
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return ((n % m) + m) % m;
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}
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private previousChannel(channel: string) {
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const size = this.channelNameList.length;
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const currentIndex = this.channelNameList.indexOf(channel);
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if (currentIndex >= 0) {
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return this.channelNameList[this.mod(currentIndex - 1, size)];
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}
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else {
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return channel;
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}
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}
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private cleanup(proc: ChildProcessWithoutNullStreams): Promise<void> {
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proc.kill('SIGHUP');
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return new Promise((resolve, reject) => {
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proc.once('exit', () =>
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resolve()
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)
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proc.on("error", (err:Error) =>
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reject(err)
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);
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})
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}
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public async zapTo(channel: string, adapter: 0 | 1 = 0): Promise<IZap> {
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let zap = adapter == 0 ? this.zap0 : this.zap1;
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let verifiedChannel: string;
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if (channel == '+') {
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verifiedChannel = this.nextChannel(zap.channel);
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}
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else if (channel == '-') {
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verifiedChannel = this.previousChannel(zap.channel);
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}
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else {
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if (!this.channelNameList.includes(channel)) {
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return Promise.reject(new Error("Invalid Channel name"));
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}
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else {
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verifiedChannel = channel;
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}
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}
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const cmd = 'dvbv5-zap'
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const args: string[] = ["-r", "-C", "US", "-I", "ZAP", "-c", this.fileName, "-a", adapter.toString(), verifiedChannel];
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if (zap.process != null) {
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await this.cleanup(zap.process).catch(err => Promise.reject(err));
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}
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zap.process = spawn(cmd, args);
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return new Promise((resolve, reject) => {
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let lockTimer: NodeJS.Timeout;
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zap.process.stderr.on("data", (data) => {
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const output = data.toString();
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if (/Lock/.test(output)) {
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clearTimeout(lockTimer);
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zap.channel = verifiedChannel;
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resolve(zap);
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}
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if (/Not locked/.test(output)) {
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clearTimeout(lockTimer);
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zap.process.kill("SIGHUP");
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}
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});
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zap.process.on("exit", (code) => {
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reject(new Error("Unexpected exit of Zap"));
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});
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lockTimer = setTimeout(() => {
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reject(new Error("Failed to Zap in time"));
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}, 5000);
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})
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}
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}
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