Google-api-php-client: Access Token is NULL for Firebase Messaging

Created on 28 Apr 2018 · 5Comments · Source: googleapis/google-api-php-client

I setuped WEB Firebace Cloud Messaging and collected tokens from clients.
I try to send first message by this instruction https://firebase.google.com/docs/cloud-messaging/js/first-message like this:

POST https://fcm.googleapis.com/v1/projects/myproject-b5ae1/messages:send HTTP/1.1

Content-Type: application/json
Authorization: Bearer ya29.ElqKBGN2Ri_Uz...HnS_uNreA

{
  "message":{
    "token" : "bk3RNwTe3H0:CI2k_HHwgIpoDKCIZvvDMExUdFQ3P1...",
    "notification" : {
      "body" : "This is an FCM notification message!",
      "title" : "FCM Message",
      }
   }
}

But I need Bearer

Content-type: application/json
Authorization: Bearer <valid Oauth 2.0 token for the service account of the Firebase project>

I need access_token to do it.

I found exampe on nodeJS, how to get access_token
I try to convert this nodeJS code to PHP (https://firebase.google.com/docs/cloud-messaging/auth-server#authorize_http_v1_send_requests)

function getAccessToken() {
  return new Promise(function(resolve, reject) {
    var key = require('./service-account.json');
    var jwtClient = new google.auth.JWT(
      key.client_email,
      null,
      key.private_key,
      SCOPES,
      null
    );
    jwtClient.authorize(function(err, tokens) {
      if (err) {
        reject(err);
        return;
      }
      resolve(tokens.access_token);
    });
  });
}

My code:

$SCOPE = "https://www.googleapis.com/auth/firebase.messaging";

$client = new Google_Client();
$client->setApplicationName('Play Cool Math Notifications');
$client->setAuthConfig("token/play-cool-math-notifications-firebase-adminsdk.json");
$client->setScopes($SCOPE);
$client->authorize();
$token = $client->getAccessToken();
echo $token;

But I got NULL, what did I do wrong?

Source

DenisSokoloff

All 5 comments

getting same issue……

jaylin507 on 3 May 2018

I found way to send w/o Access Token

private function sendNotification($_token, $_title, $_body, $_link)
    {
        $SERVER_KEY = "AAAA....";

        $data = array(
            "to" => $_token,
            //"content_available"   => false,
            "notification" => array
            (
                "title"         => $_title,
                "body"          => $_body,
                "icon"          => "https://...../icons/android-icon-192x192.png",
                "click_action"  => $_link."?".(new DateTime())->getTimestamp()
            )
        );
        $data_string = json_encode($data);

        $ch = curl_init('https://fcm.googleapis.com/fcm/send');

        curl_setopt($ch, CURLOPT_CUSTOMREQUEST,     "POST");
        curl_setopt($ch, CURLOPT_POSTFIELDS,        $data_string);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER,    true);
        curl_setopt($ch, CURLOPT_HTTPHEADER,
            array(
                'Content-Type: application/json',
                'Authorization: key='.$SERVER_KEY
            ))  ;
        $result = curl_exec($ch);
        var_dump($result);
        curl_close ($ch);

        return $result;
    }

DenisSokoloff on 3 May 2018

👎4

Thanks!

jaylin507 on 6 May 2018

Thanks for creating this issue.