iamniels

Server side printing with Google Cloud Print API from a PHP application

It took me quite some time to figure out how to print properly from a web application. I will explain here how I did it, so you don't have to spend the same time.

Authorization

Google Cloud Print API uses OAuth 2.0 for authorization.

As explained [here][1] on the Google Developer page, the best way to use OAuth with the Google API is with a Google service account. Create a service account as explained on the Google Developer page.

To use OAuth a library is required. Google has published the [Google API PHP client library][2]. If you want to use the examples from the Developer pages, you need to use version 1 of the library. In this article I use version 2 of the library.

	<!doctype html>
	<html lang="en">
	<head>
	<!-- Required meta tags -->
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

	<!-- Bootstrap CSS -->
	<link rel="stylesheet" href="https://bootswatch.com/4/darkly/bootstrap.min.css" crossorigin="anonymous">
	<script src="https://unpkg.com/feather-icons"></script>

	<?php
	$url = 'https://kiyoh.com/v1/invite/external';
	$params = array(
	'hash' => 'HASH',
	'location_id' => 'LOCATION_ID',
	'tenantId' => '98', // 99 for klantenvertellen
	'delay' => 0,
	'first_name' => 'CUSTOMER NAME', // Last name is optional, so just use first_name for the full name
	'ref_code' => 'YOUR REFERENCE',
	'language' => 'nl',

	Open On-Chip Debugger 0.9.0 (2015-09-02-10:42)
	Licensed under GNU GPL v2
	For bug reports, read
	http://openocd.org/doc/doxygen/bugs.html
	Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD
	adapter speed: 2000 kHz
	adapter_nsrst_delay: 100
	none separate
	srst_only separate srst_nogate srst_open_drain connect_deassert_srst
	Info : Unable to match requested speed 2000 kHz, using 1800 kHz