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Name	Size	Permission	Action
local-print-agent.js	2.32 KB	-rw-rw-rw-

Code Editor : local-print-agent.js

const http = require('http');
const fs = require('fs');
const os = require('os');
const path = require('path');
const { execFile } = require('child_process');

const port = Number(process.env.PMS_PRINT_AGENT_PORT || 9109);
const printerName = process.env.PMS_PRINTER_NAME || '';

function send(res, status, body) {
  res.writeHead(status, {
    'content-type': 'application/json',
    'access-control-allow-origin': '*',
    'access-control-allow-methods': 'GET,POST,OPTIONS',
    'access-control-allow-headers': 'content-type',
  });
  res.end(JSON.stringify(body));
}

function printText(payload) {
  return new Promise((resolve, reject) => {
    const file = path.join(os.tmpdir(), `pms-receipt-${Date.now()}.txt`);
    fs.writeFileSync(file, payload.receipt || '', 'utf8');

const args = printerName
      ? ['-NoProfile', '-Command', `Start-Process -FilePath notepad.exe -ArgumentList '/p','${file.replace(/'/g, "''")}' -WindowStyle Hidden`]
      : ['-NoProfile', '-Command', `Start-Process -FilePath notepad.exe -ArgumentList '/p','${file.replace(/'/g, "''")}' -WindowStyle Hidden`];

execFile('powershell.exe', args, { windowsHide: true }, (error) => {
      if (error) reject(error);
      else resolve(file);
    });
  });
}

const server = http.createServer(async (req, res) => {
  if (req.method === 'OPTIONS') {
    return send(res, 200, { ok: true });
  }

if (req.method === 'GET' && req.url === '/health') {
    return send(res, 200, { ok: true, printerName: printerName || 'Windows default printer' });
  }

if (req.method === 'POST' && req.url === '/print') {
    try {
      const payload = await collectJson(req);
      const file = await printText(payload);
      return send(res, 200, { ok: true, invoice: payload.invoice, file });
    } catch (error) {
      return send(res, 500, { ok: false, error: error.message });
    }
  }

send(res, 404, { ok: false, error: 'Not found' });
});

server.listen(port, '127.0.0.1', () => {
  console.log(`PMS local print agent running at http://127.0.0.1:${port}`);
  console.log(`Printer: ${printerName || 'Windows default printer'}`);
});

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Code Editor : local-print-agent.js