Queuing function for Order Desk API calls

orderdesk-queue.php

<?php
include "order-desk-api-client.php";
$executionStartTime = microtime(true);
register_shutdown_function("unlock");

$od = new OrderDesk($storeid, $apikey);

$storeid = $_SERVER['HTTP_ORDERDESK_STORE_ID'];
$apikey = $_SERVER['HTTP_ORDERDESK_API_KEY'];
$url = substr($_SERVER['PATH_INFO'],1);
$method = strtolower($_SERVER['REQUEST_METHOD']);
$post = array();

if ($method == "get") {
    parse_str($_SERVER['QUERY_STRING'], $post);
    $response = $od->$method($url, $post);
    $response['execution_time'] = $executionStartTime;
    echo print_r($response, 1);
    exit;
}

else {
    $post = json_decode($HTTP_RAW_POST_DATA, 1);
}

$od = new OrderDeskApiClient($storeid, $apikey);

if (@mkdir('/tmp/.'.$storeid, 0700)) {
    $response = $od->$method($url, $post);
}

else {
    for ($i = 1; 1; $i++) {
        sleep(5 * rand(0, pow(2,$i) - 1));
        if (@mkdir('/tmp/.'.$storeid, 0700)) {
            $response = $od->$method($url, $post);
            break;
        }
    }
}

$response['execution_time'] = $executionStartTime;
echo print_r($response, 1);

function unlock() {
    rmdir('/tmp/.'.$storeid);
}

?>