97 lines
2.5 KiB
JavaScript
97 lines
2.5 KiB
JavaScript
//Websocket Server <<<<<<<<<<<<<<
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var wsPort = 8080;
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var subscribers = [];
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var WebSocketServer = require('ws').Server
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, wss = new WebSocketServer({port: wsPort});
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var fs = require('fs');
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wss.on('connection', function(ws) {
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subscribers.push(ws);
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ws.send(subscribers.length-1 + '###thatsYou');
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for(var i=0;i<subscribers.length;i++) {
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if(subscribers[i] != null)
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broadcastMessage(i, "connected");
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}
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console.log("~~~~~~~~ WELCOME TO SERVER ~~~~~~ s:"+subscribers.length);
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ws.on('message', function(message) {
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var parts = message.split("###");
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if(parts[0] != "fileOp") {
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broadcastMessage(getClientId(), message);
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} else {
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if(parts[1] == "write")
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writeInFile(parts[2], parts[3], function(ret) {
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if(ret == "error") {
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broadcastMessage(getClientId(), "error###Fehler beim Schreiben einer Datei... siehe Serverlog!");
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} else {
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broadcastMessage(getClientId(), "file###"+parts[2]+"###"+parts[3]);
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}
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});
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else if(parts[1] == "read") {
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readFile(parts[2], function(content) {
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if(content == "error") {
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broadcastMessage(getClientId(), "error###Fehler beim Lesen einer Datei... siehe Serverlog!");
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} else {
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broadcastMessage(getClientId(), "file###"+parts[2]+"###"+content);
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}
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});
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}
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}
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console.log('msg: ' + message);
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});
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ws.on("close", function() {
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var cId = getClientId();
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subscribers[cId] = null;
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broadcastMessage(cId, "disconnected");
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console.log('Subscriber left: ' + subscribers.length + " total.\n");
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});
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function getClientId() {
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for(var i=0;i<subscribers.length;i++) {
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if(subscribers[i] == ws)
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return i;
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}
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}
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});
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function broadcastMessage(clientId, msg) {
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//console.log("broadcast:"+msg+" length:"+subscribers.length);
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for(var i=0;i<subscribers.length;i++) {
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if(subscribers[i] != null)
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subscribers[i].send(msg);
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}
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}
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console.log("Websocket Server running at ws://127.0.0.1:"+wsPort);
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//Show NODEJS errors
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process.on('uncaughtException', function (err) {
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console.log('Caught exception: ' + err);
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});
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function writeInFile(filename, content, callback) {
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fs.writeFile(filename, content, function(err) {
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if(err) {
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console.log(err);
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callback("error");
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} else {
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callback("success");
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console.log("The file '"+filename+"' was saved!");
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}
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});
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}
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function readFile(filname, callback) {
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fs.readFile(filname, 'utf8', function (err,data) {
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if (err) {
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console.log(err);
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callback("error");
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}
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callback(data);
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});
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}
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