Simple tracking plugin for WordPress

ajax.js

// Tracking JQuery call

function submit_me(){
		jQuery.post(the_ajax_script.ajaxurl, jQuery('#theForm').serialize()
		,
		function(response_from_tracking_function){
			jQuery("#response_area").html(response_from_tracking_function);
			}
		);
		
		jQuery('#theForm').find('input[type=text]').val('Consignment No');
			

		//jQuery( "deliverysignature" ).wrapInner( "<div><div><p><em><b></b></em></p></div></div>" );
		//});
		
		//$( "deliverysignature" ).wrapInner(function() {
		//	return "<img src=\'" + this.nodeValue + "\' />";
		//});
		/*var img = $('<img />'); //Equivalent: $(document.createElement('img'))
		img.attr('src', response_from_tracking_function.imgurl);
		img.appendTo('deliverysignature');		
		*/
}

style.css

/*
	Plugin Name: TraceNow Tracking
	Plugin URI: http://www.titandesign.co.uk
	Description: A simple parcel tracking plugin for Codeway TraceNow.
	Author: Richard King
	Author URI: http://www.titandesign.co.uk/
 
	Version: 1.0.0
 
	License: GPL-2.0+
	License URI: http://www.opensource.org/licenses/gpl-license.php 
*/
 
 
#response_area {
	width: 90%;
	margin: 0 auto;
	background-color: #eee;
	padding: 10px 20px;
	color: #000;
}
 
.tracenow {
	max-width: 100%;
}
 
#theForm{
	margin: 0 auto;
	margin-bottom: 5%;
	max-width: 500px;
}
 
#consignmentNumber {
	max-width: 100%;
	border: 1px solid #333;
	padding: 3px 5px;
}
 
#submit_button {
	position: relative;
	cursor: pointer;
	background: blue;
	color: white;
	padding: 2px 4px;
}

.category {
	font-weight: bold;
}
 
consignmentnumber {
	font-size: 24px;
}

consignmentnumber::before {
	content: "Consignment Number: ";
	color: red;
}
 
customerref,
itemcount, 
name,
address1,
address2,
town,
county,
postcode,
country,
recipient,
status,
collected,
delivered,
collectioncode,
deliverycode,
comments,
created,
deliverylatitude,
deliverylongitude {
	font-size: 18px;
	line-height: 1.2em;
}
 
deliverysignature:before {
	content: "";
}

deliverysignature:after {
	content: "";
}

itemcount::before {
	content: "Item quantity: ";
	border-bottom: 1px solid #ccc;
	color: red;
}

name::before {
	content: "Name: ";
	border-bottom: 1px solid #ccc;
	color: red;
}

address1::before {
	content: "Address: ";
	border-bottom: 1px solid #ccc;
	color: red;
}

recipient::before {
	content: "Recipient: ";
	border-bottom: 1px solid #ccc;
	color: red;
}

created::before {
	content: "Created: ";
	border-bottom: 1px solid #ccc;
	color: red;
}

status::before {
	content: "Status: ";
	border-bottom: 1px solid #ccc;
	color: red;
}

collected::before {
	content: "Collected: ";
	border-bottom: 1px solid #ccc;
	color: red;
}

delivered::before {
	content: "Delivered: ";
	border-bottom: 1px solid #ccc;
	color: red;
}

deliverylatitude::before {
	content: "Delivery Latitude: ";
	border-bottom: 1px solid #ccc;
	color: red;
}

deliverylongitude::before {
	content: "Delivery Longitude: ";
	border-bottom: 1px solid #ccc;
	color: red;
}
 
#imagediv {
	width: 90%;
	margin: 0 auto;
}

tracenow.php

<?php
 /*
 Plugin Name: TraceNow Tracking
 Plugin URI: http://www.titandesign.co.uk
 Description: A simple parcel tracking plugin for Codeway TraceNow.
 Version: 4.0
 Author: Richard King
 Author URI: http://www.titandesign.co.uk/
 
 License: GPL-2.0+
 License URI: http://www.opensource.org/licenses/gpl-license.php 
 */
 

 
 // ENQUEUE AND LOCALISE SCRIPTS
 

 wp_enqueue_script( 'my-ajax-handle', plugin_dir_url( __FILE__ ) . 'ajax.js', array( 'jquery' ) );
 
 wp_enqueue_style( 'my-ajax-handle', plugin_dir_url( __FILE__ ) . 'style.css' );
 
 wp_localize_script( 'my-ajax-handle', 'the_ajax_script', array( 'ajaxurl' => admin_url( 'admin-ajax.php' ) ) );
  
 
 // THE TRACKING FUNCTION
 
 if( !class_exists( 'WP_Http' ) )
    include_once( ABSPATH . WPINC. '/class-http.php' );
	
 
 function tracking_function(){ 
 
 	//if ( isset( $_POST['consignmentNumber'] ) && '1' == $_POST['consignmentNumber'] ) {
		
		$consignmentNumber = $_POST['consignmentNumber'];
		
  		$url = ('http://services.tracenow.net/TraceNowAccess.asmx/GetConsignment?consignmentNumber=' .($consignmentNumber) .'&externalAccessGuid=d5dbffb4-0336-44bf-b72c-00fb9aaac759');
		
		$args = array(
					
					'method' => 'GET',
					
					'timeout' => 45,
					
					'redirection' => 5,
					
					'httpversion' => '1.1',
					
					'content-type' => 'application/x-www-form-urlencoded',
					
					'body' => array(),
					
					'headers' => array(),
					
					'blocking' => true,
					
					'cookies' => array(),
					
					'connection' => 'close',
					
    				);
					
		$response = wp_remote_get( $url, $args );
		
		if ( is_wp_error( $response ) ) {
		
   				$error_message = $response->get_error_message();
				
  					 echo "Something went wrong: $error_message";
					 
				} else {
				
					/*include ('/render_xml_to_html.php');
				
							if(function_exists('render_xml_data')){
								render_xml_data('example_data.xml');
								}else{
								echo null;
							} */
						
						
						echo '<h3>Consignment Details</h3>' . '<pre>' . print_r($response['body'], true) . '</pre>';// this is passed back to the javascript function
						
						die();
					
				} // end if
				
 		//} // end if				
 }
 
 
 
 // THE AJAX ADD ACTIONS
 
 
 add_action( 'wp_ajax_the_ajax_hook', 'tracking_function' );
 
 add_action( 'wp_ajax_nopriv_the_ajax_hook', 'tracking_function' ); // need this to serve non logged in users


				
 // ADD TRACKING FORM TO THE PAGE
 
 function tracenow_frontend(){
 
 $the_form = '
 
 <form id="theForm" method="POST">
 
 <input id="consignmentNumber" name="consignmentNumber" value="Consignment No" type="text" />
 
 <input name="action" type="hidden" value="the_ajax_hook" /> <!-- this puts the action the_ajax_hook into the serialized form -->
 
 <input id="submit_button" value="Track" type="button" onClick="submit_me();" />
 
 </form>
 
 <div id="response_area">
 
 	Your tracking details will appear here
 
 <br />
 
 <div id="imagediv">
 	
 </div>
 
 </div>';// END DIV RESPONSE AREA
 
 return $the_form;
 
 }
 
 add_shortcode("tn_ajax_frontend", "tracenow_frontend");
 
 

I've tested the tracking function on its own in a separate php file. It returns the correct details for the consignment number and member guid used. The return is all the tracking details include datetime stamp, address, contact, parcel details and image of the signature.
Can be accessed here to see the xml response:

http://services.tracenow.net//TraceNowAccess.asmx/GetConsignment?consignmentNumber=lc0614061377&memberGuid=d5dbffb4-0336-44bf-b72c-00fb9aaac759 HTTP/1.1

Using the plugin the only return I get is 0. Obviously at the moment theres no installer so the plugin needs to be copied to the plugins folder manually. It will work on a page by adding the shortcode [tn_ajax_frontend].
Tracking number to use is: lc0614061377
If someone could have a look and point me in the right direction it would be gratefully appreciated.

Many thanks

Richard