Zebra CUPS

zebra_cups.py

#!/usr/bin/env python
from flask import Flask, request, abort
import cups
import requests
import os
import tempfile


app = Flask(__name__)


@app.route('/', methods=['POST'])
def print_job():
    try:
        zpl_url = request.form.get('zpl_url')
        zpl_data = request.form.get('zpl_data')
        printer = request.form['printer_name']

        if zpl_url:
            response = requests.get(zpl_url)
            response.raise_for_status()
            file_print(printer, response.content)
        elif zpl_data:
            file_print(printer, zpl_data)
    except (RuntimeError, cups.IPPError, requests.exceptions.RequestException) as error:
        abort(400)
    return '', 201


def stream_print(printer, zpl_data):
    cups_connection = cups.Connection()
    job_id = cups_connection.createJob(printer, '', {})
    cups_connection.startDocument(printer, job_id, '', cups.CUPS_FORMAT_RAW, 1)
    cups_connection.writeRequestData(zpl_data, len(zpl_data))
    cups_connection.finishDocument(printer)


def file_print(printer, zpl_data):
    temp = tempfile.NamedTemporaryFile()
    try:
        temp.write(zpl_data)
        temp.seek(0)
        cups_connection = cups.Connection()
        cups_connection.printFile(printer, temp.name, 'label', {})
    finally:
        temp.close()


if __name__ == "__main__":
    #app.debug = True
    app.run(host='0.0.0.0', port=8000)