print-utils/index.js

import {getPrinters, print} from "unix-print";

import express from 'express'
import cors from 'cors'
import bodyParser from 'body-parser'
import multer from 'multer'

const app = express()
const port = 1903

const upload = multer({dest: 'uploads/'})

app.use(cors())
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: true}));

app.get('/', (req, res) => {
    res.send('Hello World!')
})

app.get('/printers', async (req, res) => {
    const printers = await getPrinters()
    return res.json(printers.map(printer => {
        return {
            default: false,
            format: 'PDF',
            id: printer.printer,
            name: printer.printer,
        }
    }))
})

app.post('/printers/:printer/print', upload.single('file'), async (req, res) => {
    const {printer} = req.params

    // query: user-id: string, docType: label
    // form data: file: binary, copies: string, shipment-ids: string

    const fileToPrint = req.file.path;
    const printJob = await print(fileToPrint, printer);
    const jobId = getRequestId(printJob);

    return res.json({
        jobs: [jobId],
    })

})

app.listen(port, () => {
    console.log(`App listening on port ${port}`)
})

function getRequestId(printJob) {
    const requestId = printJob.stdout.split(' ')[3]
    return requestId.split('-')[1]
}