Magento XML Connect Demo

gistfile1.php

<?php


// Initialize
$app = new SimpleHttpClient('http://www.demo.local/xmlconnect/');
$app->addCookie('app_code', 'INSERT APP CODE HERE');
$app->addCookie('screen_size', '600x400');


// get products in category 3
echo "\n[REQUEST] Fetching product catalog...\n";
$response = $app->request('catalog/category/id/3/offset/0/count/100');
if ((string)$response->status == 'error') {
    echo "Error: " . (string)$response->text . "\n";
    exit(1);
}
$productId = (int)$response->xpath('/category/products/item[1]/entity_id')[0];


// add this product to the cart
echo "\n[REQUEST] Adding product $productId to cart...\n";
$response = $app->request('cart/add/product/' . $productId);
if ((string)$response->status != 'success') {
    echo "Error while adding product to cart";
    exit(1);
}
echo "Message: " . (string)$response->text . "\n";


// get cart content and verify the item we just added is there
echo "\n[REQUEST] Fetching cart content...\n";
$cart = $app->request('cart');
if ((int)$cart->products->item[0]->entity_id != $productId) {
    echo "Could not find product in cart";
    exit(1);
}
echo "Verified that product is in cart now.\n";


// get billing address form fields
echo "\n[REQUEST] Getting billing address form fields...\n";
$response = $app->request('checkout/newBillingAddressForm');
foreach ($response->field as $field) {
    echo " - {$field['name']}\n";
}


$address = array(
    'firstname' => 'John',
    'lastname' => 'Doe',
    'email' => 'john.doe@example.com',
    'street' => array('Street 1'),
    'city' => 'San Francisco',
    'country_id' => 'US',
    'region_id' => '12', // California
    'postcode' => '94015',
    'telephone' => '4152300694',
    'fax' => '',
    'save_in_address_book' => ''
);

// billing address
echo "\n[REQUEST] Posting billing address...\n";
$response = $app->request('checkout/saveBillingAddress', 'POST', array('billing' => $address));
if ((string)$response->status != 'success') {
    echo "Error while saving billing address";
    exit(1);
}
echo "Message: " . (string)$response->text . "\n";


// shipping address
echo "\n[REQUEST] Posting shipping address...\n";
$response = $app->request('checkout/saveShippingAddress', 'POST', array('shipping' => $address));
if ((string)$response->status != 'success') {
    echo "Error while saving shipping address";
    exit(1);
}
echo "Message: " . (string)$response->text . "\n";


// get shipping methods
echo "\n[REQUEST] Fetching available shipping methods...\n";
$response = $app->request('checkout/shippingMethodsList');
$shippingMethods = array();
foreach ($response->method->rates->rate as $rate) {
    $shippingMethods[] = (string)$rate['code'];
    echo " - {$rate['code']}\n";
}


// save shipping method
echo "\n[REQUEST] Saving shipping method...\n";
$response = $app->request('checkout/saveShippingMethod', 'POST', array('shipping_method' => $shippingMethods[0]));
if ((string)$response->status != 'success') {
    echo "Error while saving shipping method";
    exit(1);
}
echo "Message: " . (string)$response->text . "\n";


// get payment methods
echo "\n[REQUEST] Fetching available payment methods...\n";
$response = $app->request('checkout/paymentMethodList');
$paymentMethods = array();
foreach ($response->method_list->method as $method) {
    $paymentMethods[] = (string)$method['code'];
    echo " - {$method['code']}\n";
}

if (!in_array('checkmo', $paymentMethods)) {
    echo "This demo only supports 'checkmo'. Please enable 'Check / Money Order' in configuration.";
}


// save payment method
echo "\n[REQUEST] Saving payment method...\n";
$response = $app->request('checkout/savePayment', 'POST', array('payment' => array('method' => 'checkmo')));
if ((string)$response->status != 'success') {
    echo "Error while saving payment method";
    exit(1);
}
echo "Message: " . (string)$response->text . "\n";


// order review
echo "\n[REQUEST] Fetching order review...\n";
$response = $app->request('checkout/orderReview');
echo "Products:\n";
foreach ($response->products->item as $item) {
    echo " - {$item->qty}x {$item->name}\n";
}
echo "Totals:\n";
foreach ($response->totals->children() as $total) {
    echo " - {$total->title}: {$total->formated_value}\n";
}


// place order
echo "\n[REQUEST] Place order...\n";
$response = $app->request('checkout/saveOrder', 'POST', array('payment' => array('method' => 'checkmo')));
if ((string)$response->status != 'success') {
    echo "Error while saving order";
    exit(1);
}
echo "Message: " . (string)$response->text . "\n";
echo "Order ID: " . (string)$response->order_id . "\n";






/**
 * Simple HTTP client for demonstration purposes
 *
 * @author Fabrizio Branca
 * @since 2015-05-21
 */
class SimpleHttpClient
{

    /**
     * @var array
     */
    protected $cookieJar = array();

    /**
     * @var string
     */
    protected $baseUrl;

    /**
     * @var resource
     */
    protected $ch;

    /**
     * Constructor
     *
     * @param string $baseUrl
     */
    public function __construct($baseUrl)
    {
        $this->baseUrl = rtrim($baseUrl, '/') . '/';
        $this->ch = curl_init();
    }

    /**
     * Request (and store cookies from response in cookie jar)
     *
     * @param string $url
     * @return SimpleXMLElement response
     */
    public function request($url, $method = 'GET', array $data = array())
    {
        $url = ltrim($url, '/');
        curl_setopt($this->ch, CURLOPT_URL, $this->baseUrl . $url);
        curl_setopt($this->ch, CURLOPT_HEADER, false);
        curl_setopt($this->ch, CURLOPT_COOKIE, $this->getCookieString());
        curl_setopt($this->ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($this->ch, CURLOPT_HEADER, 1);

        if ($method == 'POST') {
            curl_setopt($this->ch, CURLOPT_POST, 1);
            curl_setopt($this->ch, CURLOPT_POSTFIELDS, http_build_query($data));
        }

        $response = curl_exec($this->ch);

        $header_size = curl_getinfo($this->ch, CURLINFO_HEADER_SIZE);
        $header = substr($response, 0, $header_size);
        $body = substr($response, $header_size);

        $this->addCookiesToJarFromHeader($header);

        return simplexml_load_string($body);
    }

    /**
     * Add cookie
     *
     * @param string $name
     * @param string $value
     */
    public function addCookie($name, $value)
    {
        $this->cookieJar[$name] = $value;
    }

    /**
     * Extract cookies from header and add them to the cookie jar
     *
     * @param string $header
     */
    protected function addCookiesToJarFromHeader($header)
    {
        preg_match_all('/^Set-Cookie:\s*([^;]*)/mi', $header, $matches);
        $cookies = array();
        foreach ($matches[1] as $item) {
            parse_str($item, $cookie);
            $cookies = array_merge($cookies, $cookie);
        }

        $this->cookieJar = array_merge($this->cookieJar, $cookies);
    }

    /**
     * Return all cookies as a string
     *
     * @return string
     */
    protected function getCookieString()
    {
        $tmp = array();
        foreach ($this->cookieJar as $name => $value) {
            $tmp[] = "$name=$value";
        }

        return implode('; ', $tmp);
    }

    /**
     * Destruct
     */
    public function __destruct()
    {
        curl_close($this->ch);
    }

}

Thank you for your video tutorial.
I am confused that why XML Connect should be in php language while we want to use it in mobile applications?
How to use this php example in Android Studio?
Do I have to setup a second php server and upload this php code to the server then try to communicate from Java to php server?
Is there any documentation on how to implement a simple data retrieval (e.g. new orders coming) app for android?

Thank you for your video tutorial.
I am confused that why XML Connect should be in php language while we want to use it in mobile applications?
How to use this php example in Android Studio?
Do I have to setup a second php server and upload this php code to the server then try to communicate from Java to php server?
Is there any documentation on how to implement a simple data retrieval (e.g. new orders coming) app for android?

@JToward, i was wonder if you manage to progress further after posting the above questions. Thanks.
/Tommy