Get a snapshot/still image from a Tmezon 7 inch doorbell network-enabled intercom

get_image.php

<?php 
  /*
    By reverse-engineering a bit the web interface, I wrote this simple script to get a clean still of a Tmezon doorbell camera
    This script has been tested with the old 720p version of this: https://www.tmezon.com/7-inch-ip-intercom-p0013.html
    It outputs an inline image, so you can upload this page to a php server and curl it to get a nice image of the current view from your doorbell
    
    As a bonus, notice that the doorbell password does not appear anywhere. NEAT :I
  */

	// Basic token authentication
	if (!(isset($_GET['token']) && $_GET['token'] == '-- Write some gibberish here --')) die('noauth');

  	// Set the doorbell IP here
	$ip = '192.168.X.X';
	
	// Turn on the doorbell camera (it goes to sleep after a minute)
	file_get_contents("http://$ip/cgi-bin/hi3510/doorConnect.cgi?&-door=0");

	// Take a snapshot
	$snap_path = file_get_contents("http://$ip/web/cgi-bin/hi3510/param.cgi?cmd=snap&");
	
	// Let's clean up a bit the snapshot string to get a nice path
	$snap_path = substr($snap_path, 11);
	$snap_path = substr($snap_path, 0, -3);
	
	// We can use this to check the snapshot progressive number
	if (isset($_GET['getlast'])) die($snap_path);
	
	// Read the image
	$img = file_get_contents("http://$ip$snap_path");
	
	// Tell the browser we're outputting a jpeg image
	header('Content-type: image/jpeg');
	header('Content-Length: ' . strlen($img));
	header('Content-Disposition: inline; filename="' . substr($snap_path, 23) . '"');
	
	// Finally, output the image
	echo $img;
?>