no data returned posting to API

I have a Wordpress plugin that posts to a custom shipping API in Australia.

Now recently the API has been updated to .Net MVC and the plugin code no longer works, even though I have updated the URL used etc. Could the params be the issue due to the fact that they're using MVC and the actual url structure has changed?

Website: http://www.portdouglasgiftbaskets.com.au/ - just add a product and view the basket

Here's a working URL on the API:

http://farmapi.fastway.org/v2/psc/lookup/AUK/Elsthorpe/4110/5?api_key=YOUR_API_KEY


I would love it if someone could tell me what is wrong as I am not a PHP developer.

<?php
/*
  Plugin Name: FastWay Courier Shipping Rates for WooCommerce
  Plugin URI: http://www.patsatech.com
  Description: FastWay Courier Shipping Rates based on Weight for WooCommerce
  Version: 1.0
  Author: PatSaTECH
  Author URI: http://www.patsatech.com
  Copyright: © 2008-2012 PatSaTECH.
  License: GNU General Public License v3.0
  License URI: http://www.gnu.org/licenses/gpl-3.0.html
 */

add_action('plugins_loaded', 'woocommerce_cust_init', 0);

function woocommerce_cust_init() {

    if (!class_exists('WC_Shipping_Method'))
        return;

function Unset_AUStates( $states ) {     
	unset($states["AU"]);
	//$states["AU"] = array();
	return $states; 
} 
add_filter( 'woocommerce_states', 'Unset_AUStates', 10, 1 );		
	 	

function Unset_AULocale( $states ) {     
	unset($states["AU"]);
	$states["AU"] = array(
					'state'		=> array(
						'label' 		=> __('Suburb', 'woocommerce'),
						'placeholder' 	=> __('Suburb', 'woocommerce'),
						'required' 		=> true
					));
	return $states; 
} 
add_filter( 'woocommerce_get_country_locale', 'Unset_AULocale', 10, 1 );	
		
// Our hooked in function - $fields is passed via the filter!
function Override_State_Fields( $fields ) {
     $fields['billing']['billing_suburb'] = array(
        'label'     => __('State', 'woocommerce'),
    'placeholder'   => _x('State', 'placeholder', 'woocommerce'),
    'required'  => true,
    'class'     => array('form-row-wide'),
    'clear'     => true
     );
     $fields['shipping']['shipping_suburb'] = array(
        'label'     => __('Suburb', 'woocommerce'),
    'placeholder'   => _x('Suburb', 'placeholder', 'woocommerce'),
    'required'  => true,
    'class'     => array('form-row-wide'),
    'clear'     => true
     );
     $fields['billing']['billing_state']['label'] = 'Suburb';
     $fields['billing']['billing_state']['placeholder'] = 'Suburb';
     $fields['shipping']['shipping_state']['label'] = 'Suburb';
     $fields['shipping']['shipping_state']['placeholder'] = 'Suburb';
     return $fields;
}

add_filter( 'woocommerce_checkout_fields' , 'Override_State_Fields' );

add_action('woocommerce_checkout_update_order_meta', 'Update_State_Fields');
 
function Update_State_Fields( $order_id ) {
    if ($_POST['shipping_suburb']) update_post_meta( $order_id, '_shipping_state', esc_attr($_POST['shipping_suburb']));
    if ($_POST['billing_suburb']) update_post_meta( $order_id, '_billing_state', esc_attr($_POST['billing_suburb']));
}

class WC_FastWay_Courier extends WC_Shipping_Method {
	
	function __construct() { 
		$this->id = 'FastWay_Courier';
		$this->method_title = __('FastWay Courier', 'woocommerce');
		$this->init();
	} 
	
    function init() {
		// Load the form fields.
		$this->init_form_fields();
		
		// Load the settings.
		$this->init_settings();
		
		// Define user set variables
		$this->enabled		= empty( $this->settings['enabled'] ) ? 'no' : $this->settings['enabled'];
		$this->title		= empty( $this->settings['title'] ) ? '' : $this->settings['title'];
		$this->api_key		= empty( $this->settings['api_key'] ) ? '' : $this->settings['api_key'];
		$this->free_postcode= empty( $this->settings['free_postcode'] ) ? '' : $this->settings['free_postcode'];
		$this->availability	= empty( $this->settings['availability'] ) ? '' : $this->settings['availability'];
		$this->countries	= empty( $this->settings['countries'] ) ? '' : $this->settings['countries'];	
		add_action('woocommerce_update_options_shipping_'.$this->id, array(&$this, 'process_admin_options'));
	}
	 
 
	 
	function calculate_shipping( $data = false ) {
		global $woocommerce;
		$shipping_total = 0;
		$api_key = $this->api_key;
		$free_postcode = $this->free_postcode;
		if(empty($free_postcode)){
			$free_postcode = '0000';
		}
		$free_postcode = explode(',',$free_postcode);

		//$woocommerce->add_error( "Sorry, we don't ship to PO BOX addresses." );
		 
        $customer = $woocommerce->customer;
		
		$weight = $woocommerce->cart->cart_contents_weight;
		
		$state = $customer->get_shipping_state();
		
		$code = $customer->get_shipping_postcode();
		
		//$rates = "http://farmapi.fastway.org/latest/psc/lookup/CNS/$state/$code/$weight?&api_key=$api_key";
		$params = array(
					  	"RFCode" => "CNS",
					  	"Suburb" => $state,
					  	"DestPostcode " => $code,
						"WeightInKg " => $weight,
						"api_key" => $api_key
					  );	
		$rate = $this->getrates($params);
		$shipping_total = $this->api_key;
		if(in_array($code, $free_postcode)){
			$freerate = array(
	    		'id' 	=> 'free_shipping',
	    		'label' => 'Free Shipping',
	    		'cost' 	=> 0,
	    		'taxes' => false
	    	);
	    	$this->add_rate( $freerate );
			
		}else{
			if(!isset($rate['error'])){
				$totweight = $rate["result"]['parcel_weight_kg'];
				foreach($rate['result']['services'] as $id => $value){		
				$rates = "";
				if($value['type'] == 'Satchel' && $totweight <= '2'){			
						$rates = array(
							'id' 		=> $value['type'],
							'label' 	=> $value['type'], 
							'cost' 		=> $value['labelprice_normal']
						);
						$this->add_rate($rates);
				}else if($value['type'] == 'Parcel' && $totweight > '2'){			
						$rates = array(
							'id' 		=> $value['type'],
							'label' 	=> $value['type'], 
							'cost' 		=> $value['labelprice_normal']
						);
						$this->add_rate($rates);
				}
					/*if($value['FranchiseName'] == 'Wollongong'){
						echo $value['FranchiseCode'];
					}*/
				}
			}else{
				//$woocommerce->add_error('Please enter the Suburb in State feild to Calculate the Shipping Correctly.');
				$woocommerce->add_error($rate['error']);
			}
		}
	}
	
	function init_form_fields() {
    	global $woocommerce;
    	$this->form_fields = array(
			'enabled' => array(
				'title' 		=> __( 'Enable', 'woocommerce' ), 
				'type' 			=> 'checkbox', 
				'label' 		=> __( 'Enable FastWay Courier', 'woocommerce' ), 
				'default' 		=> 'yes'
			), 
			'api_key' => array(
				'title' 		=> __( 'API Key', 'woocommerce' ), 
				'type' 			=> 'text', 
				'description' 	=> __( 'API reuired to get rates from FastWay.', 'woocommerce' ), 
				'default'		=> ''
			),
			'free_postcode' => array(
				'title' 		=> __( 'Free PostCodes', 'woocommerce' ), 
				'type' 			=> 'text', 
				'description' 	=> __( 'Seperate with commas(,). These PostCode will be shown a Free Shipping Option Only.', 'woocommerce' ), 
				'default'		=> ''
			),
			'availability' => array(
							'title' 		=> __( 'Method availability', 'woocommerce' ), 
							'type' 			=> 'select', 
							'default' 		=> 'all',
							'class'			=> 'availability',
							'options'		=> array(
								'all' 		=> __('All allowed countries', 'woocommerce'),
								'specific' 	=> __('Specific Countries', 'woocommerce')
							)
						),
			'countries' => array(
							'title' 		=> __( 'Specific Countries', 'woocommerce' ), 
							'type' 			=> 'multiselect', 
							'class'			=> 'chosen_select',
							'css'			=> 'width: 450px;',
							'default' 		=> '',
							'options'		=> $woocommerce->countries->countries
						)	
		);
	}

	function admin_options() {
		global $woocommerce; ?>
		<h3><?php echo $this->method_title; ?></h3>
		
		<table class="form-table">
    		<?php $this->generate_settings_html(); ?>
    	</table> <?php
	}

    function is_available( $package ) {
    	global $woocommerce;
    	
    	if ($this->enabled=="no") return false;
		
		// If post codes are listed, let's use them.
		$codes = '';
		if($this->codes != '') {
			foreach(explode(',',$this->codes) as $code) {
				$codes[] = $this->clean($code);
			}
		}
		
		if (is_array($codes))
			if ( ! in_array($this->clean( $package['destination']['postcode'] ), $codes))
				return false;
		
		// Either post codes not setup, or post codes are in array... so lefts check countries for backwards compatability.
		$ship_to_countries = '';
		if ($this->availability == 'specific') :
			$ship_to_countries = $this->countries;
		else :
			if (get_option('woocommerce_allowed_countries')=='specific') :
				$ship_to_countries = get_option('woocommerce_specific_allowed_countries');
			endif;
		endif; 

		if (is_array($ship_to_countries))
			if (!in_array( $package['destination']['country'] , $ship_to_countries))
				return false;
		
		// Yay! We passed!
		return apply_filters( 'woocommerce_shipping_' . $this->id . '_is_available', true );
    } 
    
    function clean($code) {
    	return str_replace('-','',sanitize_title($code));
    }
	
	function getrates($params){
	
		$url = "http://farmapi.fastway.org/v3/psc/lookup/";
		$curl = curl_init();		
		curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
		curl_setopt($curl, CURLOPT_URL, $url);
		curl_setopt($curl, CURLOPT_POST, true);
		curl_setopt($curl, CURLOPT_POSTFIELDS, $params);
		curl_setopt($curl, CURLOPT_USERAGENT, "Fastway API PHP Wrapper");
		$raw_result = curl_exec($curl);
		$result = json_decode($raw_result, true);	
		curl_close($curl);
		return $result;
	}
    
}
function add_fastway_courier_method($methods) { $methods[] = 'WC_FastWay_Courier'; return $methods; }
add_filter('woocommerce_shipping_methods','add_fastway_courier_method');
}

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