PHP Google Checkout Notifications - code sample for sending notification request?

Question

I've integrated Google Checkout with a site, got it working / pretending to charge people fine and also processing the order notifications fine.

However, when I make a request back to Google to get the details of the notification, I receive a 400 response, something about invalid XML.

Thing is, everything for this integration so far has been HTML key value pairs, but all of a sudden I need to parse and deal with XML? I may be missing something, but I can't see where in the docs it tells me exactly what my request should look like.

See here: http://code.google.com/apis/checkout/developer/Google_Checkout_HTML_API_Notification_API.html#Receiving_and_Processing_Notifications

It clearly lists an example with name / value pairs, yet apparently I actually need to send them as XML?

Here's where I am right now:

<?php    $header_arr = array("Authorization: Basic ".$authKey,
                    "Content-Type: application/xml; charset=UTF-8",
            "Accept: application/xml; charset=UTF-8");

$request='type=notification-history-request&serial-number='.$serialNumber;

$ch = curl_init($test_URL);     
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, $header_arr);
curl_setopt($ch, CURLOPT_POSTFIELDS, $request);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$body = curl_exec($ch);

if (curl_errno($ch)) {
  $log.=', error! :'.curl_error($ch);
} else {
  $status_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
  $log.=', status code is: '.$status_code;  //400
}
?>

This returns a 400 each time - yes I realise I'm setting an accept header for XML, this is as the docs specify, here: http://code.google.com/apis/checkout/developer/Google_Checkout_HTML_API.html#https_auth_scheme

So, I find myself needing to send the correct request... any ideas?

P.S I've also checked through google's sample code but it's so layered and dependency-ridden that while I've managed to use some of it, the rest is a mystery - so unless you can give me line numbers, the samples aren't much help

totallyNotLizards totallyNotLizards · Accepted Answer · 2011-11-11T14:43:12

OK turns out this was really simple.

I had the param names wrong - 'type' should have been '_type', like this:

$request='_type=notification-history-request&serial-number='.$serialNumber;

I'm getting the response I need now, panic averted :)

PHP Google Checkout Notifications - code sample for sending notification request?

1 Answers