Code Samples

Printing is a plain TCP socket, so every language does the same three things: connect to virtual-printer.online on your printer's port, write the bytes, close the connection. Encoding matters — the samples below use CP437, the default code page; see Code pages if your receipt has non-ASCII text.

using System.Net.Sockets;
using System.Text;

// Raw TCP, like printing to a network printer on 9100 - use your printer's own port.
var client = new TcpClient("virtual-printer.online", 9107);
var stream = client.GetStream();
var data = Encoding.GetEncoding(437).GetBytes("Hello from Virtual Printer!\n");
stream.Write(data, 0, data.Length);
client.Close();

#include <winsock2.h>
#include <ws2tcpip.h>
#include <iostream>
#pragma comment(lib, "Ws2_32.lib")

int main() {
    WSADATA wsaData;
    WSAStartup(MAKEWORD(2, 2), &wsaData);

    SOCKET sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

    sockaddr_in addr;
    addr.sin_family = AF_INET;
    addr.sin_port = htons(9107); // your printer's port from the 9100 block
    inet_pton(AF_INET, "virtual-printer.online", &addr.sin_addr);

    connect(sock, (sockaddr*)&addr, sizeof(addr));

    const char* data = "Hello from Virtual Printer!\n";
    send(sock, data, strlen(data), 0);

    closesocket(sock);
    WSACleanup();
    return 0;
}

const net = require('net');

// Raw TCP, like printing to a network printer on 9100 - use your printer's own port.
const client = net.connect({ host: 'virtual-printer.online', port: 9107 }, () => {
  const buffer = Buffer.from('Hello from Virtual Printer!\n', 'latin1');
  client.write(buffer);
  client.end();
});

import socket

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# Raw TCP, like printing to a network printer on 9100 - use your printer's own port.
sock.connect(('virtual-printer.online', 9107))
data = 'Hello from Virtual Printer!\n'.encode('cp437')
sock.sendall(data)
sock.close()

Next pageAutomated Tests →