C2DM Server with PHP 401 Error - php

Question

I'm building my own C2DM application right now. I first started with a small Android application to test the push feature. And it works if I just call the curl command with the correct settings in my shell.
Now for the server part I wanted to use PHP but as it seems I'm doing something wrong as I always get a 401 error message when I try to send a message to the client. First of all the code consists of two parts. The first curl request asks for the server token. This works I get a real response from google with a working token!
The second curl request ends up with a 401 error message. Any ideas what I'm doing wrong?
$post_params = array ( "Email" => $MY_GOOGLE_ACC, "Passwd" => $MY_GOOGLE_PWD, "accountType"=>"GOOGLE", "source=" . $MY_GOOGLE_SRC, "service=ac2dm" );
$first = true;
$data_msg = "";
foreach ($post_params as $key => $value) {
if ($first)
$first = false;
else
$data_msg .= "&";
$data_msg .= urlencode($key) ."=". urlencode($value);
}
$x = curl_init("https://www.google.com/accounts/ClientLogin");
curl_setopt($x, CURLOPT_HEADER, 1);
curl_setopt($x, CURLOPT_POST, 1);
curl_setopt($x, CURLOPT_POSTFIELDS, $data_msg);
curl_setopt($x, CURLOPT_RETURNTRANSFER, 1);
$data = curl_exec($x);
curl_close($x);
$response = $data;
$authKey = trim(substr($response, 4+strpos($response, "SID=")));
echo $authKey;
$collapse_key = 'something';
$post_params = array ( "registration_id" => $DEVICE_TOKEN, "collapse_key" => $collapse_key, "data.payload"=>"cakephp" );
$first = true;
$data_msg = "";
foreach ($post_params as $key => $value) {
if ($first)
$first = false;
else
$data_msg .= "&";
$data_msg .= urlencode($key) ."=". urlencode($value);
}
$size=strlen($data_msg);
$x = curl_init("https://android.apis.google.com/c2dm/send");
curl_setopt($x, CURLOPT_HTTPHEADER, array('Content-Type: application/x-www-form-urlencoded', 'Content-Length:'. $size, 'Authorization: GoogleLogin auth=' . $authKey));
curl_setopt($x, CURLOPT_HEADER, 1);
curl_setopt($x, CURLOPT_POST, 1);
curl_setopt($x, CURLOPT_POSTFIELDS, $data_msg);
curl_setopt($x, CURLOPT_RETURNTRANSFER, 1);
$data = curl_exec($x);
curl_close($x);
$response = $data;

Answer 1

Example of key'd array use with curl. This is pretty much the exact code I have working (with minor changes for clarity).
$headers = array('Authorization: GoogleLogin auth=' . $authcode);
$data = array(
'registration_id' => $device_registration_id,
'collapse_key' => 'ck_' . $device_id,
'data.arg' => 'arrrrghhh'
);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://android.apis.google.com/c2dm/send");
if($headers) curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_exec($ch);
$authcode is the SID returned by ClientLogin. $device_registration_id is the registration ID that the client app on the phone gave us when we did the C2DM_REGISTER.
Hope that helps.

Answer 2

Try to register your app here. I had the same problem.

Answer 3

I'm not totally sure what's going on here, but here's a few difference I noticed from my application server that works fine.
In your curl_setopt call for CURLOPT_HTTPHEADER there is no space between the content length and the size. This 'shouldn't cause a problem, but I've seen webservers get tempremental over stupid stuff like that before.
Also, CURLOPT_POSTFIELDS is a string whereas I send mine as a key'd array.
Other than that I looks the same as my working code.