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114 lines
3.8 KiB
JavaScript
114 lines
3.8 KiB
JavaScript
const http = require('http')
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const url = require('url')
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const fs = require('fs')
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const ws = require('ws')
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const redis = require('redis')
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const mime = require('mime')
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const XMLHttpRequest = require("xmlhttprequest").XMLHttpRequest
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const host = 'http://127.0.0.1:8080/'
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const outpath = ['sym', '', 'manifest.json', 'admin', 'stats', 'analytics']
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let led1_status = 'off';
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//redis client
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const redis_cli = redis.createClient({
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host: '127.0.0.1',
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port: 6379
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})
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redis_cli.on("error", function (error) {
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console.error(error)
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})
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//HTTP server
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http.createServer(function (req, res) {
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const q = url.parse(req.url, true);
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let filename = "./public" + q.pathname;
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let path_split = q.pathname.split("/", 3);
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if (path_split[path_split.length - 1] === "") filename += "/index.html";
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let file_type = mime.getType(filename)
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if (path_split[1] === "connect") {
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res.writeHead(200, {'Content-Type': file_type});
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res.write("");
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return res.end();
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}
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fs.readFile(filename, function(err, data) {
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if (err) {
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res.writeHead(404, {'Content-Type': "text/html"});
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return res.end("404 Not Found");
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}
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res.writeHead(200, {'Content-Type': file_type});
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res.write(data);
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return res.end();
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})
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}).listen(8080);
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//WS server
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const wss = new ws.Server({
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port: 8081,
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perMessageDeflate: {
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zlibDeflateOptions: {
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// See zlib defaults.
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chunkSize: 1024,
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memLevel: 7,
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level: 3
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},
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zlibInflateOptions: {
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chunkSize: 10 * 1024
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},
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// Other options settable:
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clientNoContextTakeover: true, // Defaults to negotiated value.
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serverNoContextTakeover: true, // Defaults to negotiated value.
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serverMaxWindowBits: 10, // Defaults to negotiated value.
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// Below options specified as default values.
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concurrencyLimit: 10, // Limits zlib concurrency for perf.
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threshold: 1024 // Size (in bytes) below which messages
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// should not be compressed.
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}
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});
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//WS handler
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wss.on('connection', ws => {
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ws.on('message', message => {
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console.log(`Received message => ${message}`)
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let msg = message.split(";", 2)
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if (msg[0] === 'led1') {
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if (msg[1] === '') ws.send('error;try again')
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else if (msg[1] === 'on' || msg[1] === "off"){
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let xhr = new XMLHttpRequest();
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xhr.onreadystatechange = function() {
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if (xhr.readyState === 4 && xhr.status === 200) {
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wss.clients.forEach(clients => {
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clients.send(message)
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})
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led1_status = msg[1]
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}
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}
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xhr.open('GET', `http://192.168.1.210/${msg[1]}`, true);
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xhr.timeout = 1000;
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xhr.ontimeout = function(e) {ws.send('error;device "led1" is offline')}
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xhr.send();
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setTimeout(to => {if (xhr.readyState !== 4) ws.send('error;device "led1" took too long to reach');xhr.abort()}, 1500)
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}else ws.send('error;try again')
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}
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})
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ws.send('websocket connected')
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ws.send(`led1;${led1_status}`)
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})
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//random key
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function get_key(length) {
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let forbidden = false; let output = ''
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let characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
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do{
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for (let i = 0; i < length; i++ )
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output += characters.charAt(Math.floor(Math.random() * characters.length))
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for (let i = 0; i < output.length; i++) if (output === outpath[i]) forbidden = true
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redis_cli.hget("surl;"+output, "url", function(err, obj) {
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if(err) console.log(err)
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if(obj) forbidden = true
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})
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} while (forbidden)
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return output
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}
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