I am new to Node.js and I have 2 questions about it:
- Can you create regular TCP sockets on the server's side?
- Is it possible to read/write to a file on the server's side?
That's all. Both of these are critical for putting my program on the web.
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1 Answer
Node has inbuilt modules that have the functionality you're looking for. You can create raw TCP sockets on the server side with the native net module.
var net = require('net');
net.createServer(function(socket) {
socket.write('data');
socket.end();
});
And there is also a fs module for file system manipulation:
var fs = require('fs');
var data = 'a string';
var file = './file';
fs.writeFile(file, data, function(err) {
if (err) throw err;
// file has been written to disk
});
// or synchronously writing a file
fs.writeFileSync(file, data);
// fetch the data asynchronously
fs.readFile(file, function(err, data) {
// we have "a string"
});
// synchronously reading a file
var str = fs.readFileSync(file);
5 Comments
hammereditor
I want to create a client-like socket that connects to a server, not a server-sided TCP socket.
hexacyanide
You asked for a "regular TCP socket on the server's side". What are you asking for then? Connecting to a TCP server with Node?
hammereditor
The web application will act as kind of a 'relay' to another server. It will act as a client. So I need to create client sockets.
hexacyanide
Just use
net.Connect(). Find it here: nodejs.org/api/… hammereditor
Okay, thank you. I will first try to get a program from a Socket.IO tutorial running, then completely modify the code so that I can test TCP sockets.