curl - PHP: Why is it not sending a push notification to the subscription? - Stack Overflow

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I am working on a backend PHP script to send notifications to a subscription. Here is my code:

<?php
$endpoint = "/?token=BQYAAAAEycZlxsQTTp9zcqC%2fb8SosCVZv8A%2fzlCmVXBhpFZsBydTExEV7punPkvI6Iyq34EvL4DCGnq1q5iltFpbXpNfFIMFmZX5zceXuMKnxD7vfMCICw9T5j6yRyTtueWg%2fCpatXRfRTpVA3KnW2ZEW1HjcOvqY92pKLyj8Q0qNetRkyl1WUVhi46IjRRzFXqtB8zyM4jr%2fp0KUbGhhUIKodZ8QreC%2fGiw8CpVAjIFjn2F5a98zDgTyj6NHajd5OWGSQ2lzo452DmQpHgattx9bSfhfC7SrVuvBvoS7YUQ3y3lR4pfAejU9DIPc5H0iDCim9LDQ3BqfqCUJpW5l25NQNrs";
$keys = [
    "p256dh" => "BA7Fcw-tgO1UZrNZPUZjntJtkBYigJNLxcGFFRyHa0my0SszwnUwu0sZaE4W-EZas7yPi9iFNIe4LG5z6PtNfXc",
    "auth" => "mRmbv1KsA_Yc_sKR43KnQw"
];
$headers = [
    "TTL: 60",
    "Content-Encoding: aes128gcm",
    "Authorization: vapid t=eyJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiJ9.eyJhdWQiOiJodHRwczovL3duczItYnkzcC5ub3RpZnkud2luZG93cy5jb20iLCJleHAiOjE3Mzc0MzYwMjYsInN1YiI6Im1haWx0bzpzaW1wbGUtcHVzaC1kZW1vQGdhdW50ZmFjZS5jby51ayJ9.rtM4tswfpR4NQtgcTgO5zZBa-Hyw-7EZtQkI1z1o6VWIEcaqly7NR0-uXFJAFS1AQ406wrXlgXlOaayPXDmUnQ, k=BDd3_hVL9fZi9Ybo2UUzA284WG5FZR30_95YeZJsiApwXKpNcF1rRPF3foIiBHXRdJI2Qhumhf6_LFTeZaNndIo"
];

$message = json_encode([
    "title" => "Notification Title",
    "body" => "This is the body of the notification."
]);

$ch = curl_init($endpoint);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_POSTFIELDS, $message);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($ch);
if ($response === false) {
    throw new Exception('Curl error: ' . curl_error($ch));
}
curl_close($ch);

echo $response;
?>

The article at / says that messages have to be encrypted, but I'm not sure it applies to my situation.

When I visit this page in my browser, there is nothing on the page, which means it should have worked, even though I never receive a notification. Can someone please help me?

I am working on a backend PHP script to send notifications to a subscription. Here is my code:

<?php
$endpoint = "https://wns2-by3p.notify.windows.com/w/?token=BQYAAAAEycZlxsQTTp9zcqC%2fb8SosCVZv8A%2fzlCmVXBhpFZsBydTExEV7punPkvI6Iyq34EvL4DCGnq1q5iltFpbXpNfFIMFmZX5zceXuMKnxD7vfMCICw9T5j6yRyTtueWg%2fCpatXRfRTpVA3KnW2ZEW1HjcOvqY92pKLyj8Q0qNetRkyl1WUVhi46IjRRzFXqtB8zyM4jr%2fp0KUbGhhUIKodZ8QreC%2fGiw8CpVAjIFjn2F5a98zDgTyj6NHajd5OWGSQ2lzo452DmQpHgattx9bSfhfC7SrVuvBvoS7YUQ3y3lR4pfAejU9DIPc5H0iDCim9LDQ3BqfqCUJpW5l25NQNrs";
$keys = [
    "p256dh" => "BA7Fcw-tgO1UZrNZPUZjntJtkBYigJNLxcGFFRyHa0my0SszwnUwu0sZaE4W-EZas7yPi9iFNIe4LG5z6PtNfXc",
    "auth" => "mRmbv1KsA_Yc_sKR43KnQw"
];
$headers = [
    "TTL: 60",
    "Content-Encoding: aes128gcm",
    "Authorization: vapid t=eyJ0eXAiOiJKV1QiLCJhbGciOiJFUzI1NiJ9.eyJhdWQiOiJodHRwczovL3duczItYnkzcC5ub3RpZnkud2luZG93cy5jb20iLCJleHAiOjE3Mzc0MzYwMjYsInN1YiI6Im1haWx0bzpzaW1wbGUtcHVzaC1kZW1vQGdhdW50ZmFjZS5jby51ayJ9.rtM4tswfpR4NQtgcTgO5zZBa-Hyw-7EZtQkI1z1o6VWIEcaqly7NR0-uXFJAFS1AQ406wrXlgXlOaayPXDmUnQ, k=BDd3_hVL9fZi9Ybo2UUzA284WG5FZR30_95YeZJsiApwXKpNcF1rRPF3foIiBHXRdJI2Qhumhf6_LFTeZaNndIo"
];

$message = json_encode([
    "title" => "Notification Title",
    "body" => "This is the body of the notification."
]);

$ch = curl_init($endpoint);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_POSTFIELDS, $message);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($ch);
if ($response === false) {
    throw new Exception('Curl error: ' . curl_error($ch));
}
curl_close($ch);

echo $response;
?>

The article at https://developer.chrome.com/blog/web-push-encryption/ says that messages have to be encrypted, but I'm not sure it applies to my situation.

When I visit this page in my browser, there is nothing on the page, which means it should have worked, even though I never receive a notification. Can someone please help me?

• php
• curl
• web-push

Share Improve this question Follow edited Jan 21 at 15:11 Peemima asked Jan 21 at 14:24 PeemimaPeemima 922 bronze badges 5

• there is nothing on the page, which means it should have worked...why do you think that? – ADyson Commented Jan 21 at 14:32
• 1 Are you sure your site is able to display exceptions? – shingo Commented Jan 21 at 14:35
• 2 And please note if the remote service responds error code such as 403, 503, curl_exec returns true, you should check the status code. – shingo Commented Jan 21 at 14:44
• I am never receiving the notification, that's why I know it doesn't work. – Peemima Commented Jan 21 at 15:02
• That doesn't pinpoint a specific issue in your curl request of your php script though. There could be many reasons why a notification isn't received. Have you got php error reporting enabled? Have you debugged the curl request thoroughly and checked the response code, response body and any other potentially useful response headers? What exactly are you seeing back from that? You need to give us some meaningful info before we can help you - we can't run your code ourselves to test it. A code dump and "it's not working" isn't a meaningful problem description. – ADyson Commented Jan 21 at 15:05

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2 Answers 2

Sorted by: Reset to default 1

I don't have a solution, but I would advise you to check possible CURL errors.

Add something like the following to your code (instead of branching on the response like you do now):

if (curl_errno($ch)) {
    echo 'Error: ' . curl_error($ch);
    exit;
}

Next: If you get a blank page, first place to look is your webservers errorlog.

For Apache2 this is the standard errorlog of Apache, or in case you set up another one in your VHOST, check that one.

messages have to be encrypted, but I'm not sure it applies to my situation

Yes, it applies to your situation because you are sending a message with some data (title and body).

You need to implement message encryption:

https://datatracker.ietf.org/doc/html/rfc8291

It's not an easy task...

I recommend using a PHP library for Web Push that does that for you:

• https://github.com/web-push-libs/web-push-php (open source)
• https://github.com/pushpad/pushpad-php (SaaS)

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