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Server Initiated Push

Sending a push notification from the simulator or mobile devi...
Server Initiated Push

Server Initiated Push

Sending a push notification from the simulator or mobile device is pretty trivial when we use the Push class. However, sending push messages from the server seems to be a bit more complicated for most developers since its not as well documented. The main point of complexity is that we didn't provide any samples of server push code and from the fact that the server expects arguments as POST.

This code should work for Java desktop and server side to perform a simple push, notice that the complexity is mostly related to JavaSE's lack of simplified POST arguments.

URLConnection connection = new URL("").openConnection();
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");
String query = "packageName=PACKAGE_NAME&" + deviceId +
                    "&type=1&auth=GOOGLE_AUTHKEY&certPassword=CERTIFICATE_PASSWORD&" +
                    "cert=LINK_TO_YOUR_P12_FILE&body=" + URLEncoder.encode(MESSAGE_BODY, "UTF-8"); 
try (OutputStream output = connection.getOutputStream()) {
int c = connection.getResponseCode();

The PHP code below was sent to us by a developer, we didn't test it but got feedback that it works fine.

$args = http_build_query(array(
'certPassword' => 'CERTIFICATE_PASSWORD',
'cert' => 'LINK_TO_YOUR_P12_FILE',
'production' => false,
'device' => $device['deviceId'],
'packageName' => 'YOUR_APP_PACKAGE_HERE',
'type' => 1,
'body' => $wstext));
$opts = array('http' =>
        'method'  => 'POST',
        'header'  => 'Content-type: application/x-www-form-urlencoded',
        'content' => $args 
$context = stream_context_create($opts);
$response = file_get_contents("", false, $context);
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Posted by Shai Almog

Shai is the co-founder of Codename One. He's been a professional programmer for over 25 years. During that time he has worked with dozens of companies including Sun Microsystems.
For more follow Shai on Twitter & github.