Hikvision Camera Snapshot Auth Proxy

snapshot.php

<?php
# Hikvision Snapshot Proxy - authenticates session via GET request to retrieve
# a snapshot from an internal camera (not open to the Internet)
#
# https://yourserver/snapshot.php?auth=abcd1234&snapshot=2
# https://yourserver/snapshot.php?auth=abcd1234&snapshot=1
#
$password = "abcd1234";
$user = "user";  # of your camera
$pass = "password";  # of your camera
# Update the IP's below for your internal camera IP's, add other else if's if 
# you have more than 2 cameras, remove one if you have only 1. 

if (preg_match('/^192.168.1.\d+$/',$_SERVER['REMOTE_ADDR'])) {
    $auth=1;
}
if ($_REQUEST['auth'] && (!preg_match('/^[a-zA-Z0-9]+$/',$_REQUEST['auth']))) {
    exit;
}
if ($_REQUEST['snapshot'] && (!preg_match('/^[0-9]+$/',$_REQUEST['snapshot']))) {
    exit;
}

if (($_REQUEST['auth'] == $password) || ($auth == 1)) {
   if ($_REQUEST['snapshot'] == 1) {
    $url = "http://$user:$pass@192.168.2.12/Streaming/channels/1/picture";
   } else if ($_REQUEST['snapshot'] == 2) {
    $url = "http://$user:$pass@192.168.2.2/Streaming/channels/1/picture";
   }

  if ($url) {
      header("Content-type: image/jpeg");
      $image= file_get_contents($url);
      echo $image;
  }
}
?>