Question

I need to write socket in nodejs such as in PHP. In PHP language I do something like the following:

$http_request  = "POST $path HTTP/1.0\r\n";
$http_request .= "Host: $host\r\n";
$http_request .= "User-Agent: Picatcha/PHP\r\n";
$http_request .= "Content-Length: " . strlen($data) . "\r\n";
$http_request .= "Content-Type: application/x-www-form-urlencoded;\r\n";
$http_request .= "\r\n";
$http_request .= $data;

$response = '';
$fs = @fsockopen($host, $port, $errno, $errstr, 10)
if (FALSE == $fs) {
  die('Could not open socket');
}

fwrite($fs, $http_request);

How can I do thing above in nodejs server?

Answer 1

Take a look at the documentation for the net module.

net.connect(arguments...)

Construct a new socket object and opens a socket to the given location.

The function returns a Socket.

There’s a small example snippet on the page to demonstrate its use:

var net = require('net');
var client = net.connect(8124, function() { //'connect' listener
  console.log('client connected');
  client.write('world!\r\n');
});
client.on('data', function(data) {
  console.log(data.toString());
  client.end();
});
client.on('end', function() {
  console.log('client disconnected');
});

It’s been a while since I wrote PHP, but I would try this as a translation of your code:

var net = require('net');

var http_request;
http_request  = "POST " + path + " HTTP/1.0\r\n";
http_request += "Host: " + host + "\r\n";
http_request += "User-Agent: Picatcha/PHP\r\n";
http_request += "Content-Length: " + data.length + "\r\n";
http_request += "Content-Type: application/x-www-form-urlencoded;\r\n";
http_request += "\r\n";
http_request += data;

var client = net.connect(80, host, function() {
  client.end(http_request);
});

It’s worth nothing that, unless there’s a reason not to, you can use the request method of the http module to make HTTP requests.