Can't get webhooks using URL of my PHP script published on IIS.

[pnfstas]

I installed SMS GateWay on my Android (version 13), enabled cloud and local modes, configured the app permissions: SMS, phone, disabled the app from stopping in the background. Then I set up https on localhost. I also wrote a simple PHP script that gets the response content and writes it to a text file.

$jsonData = file_get_contents("php://input");
$arrData = json_decode($jsonData, true);
error_log("Response:\n" . var_export($arrData, true), 3, $log_filename);

I placed the PHP script in https://localhost/MyApp/ReceiveWebhooks.php and registered this endpoint as a webhook via the API:

curl -X POST -u <username>:<password> \
  -H "Content-Type: application/json" \
  -d '{ "url": "https://localhost/MyApp/ReceiveWebhooks.php", \
         "deviceId": "ffffffff980b485a000001991981ac13", \
         "event": "sms:received" }' \
  https://api.sms-gate.app/3rdparty/v1/webhooks

But the webhooks are not received: my script is not started. I also tried registering the webhook in local mode, but it did not solve the problem.
What is wrong?

[capcom6]

Hello!

Thank you for your interest in my project.

For the app on the device, localhost refers to the device itself. Have you placed the PHP script directly on your Android device? If not, you should use the IP address or hostname of your PC where the web server is actually running. Your PC must be accessible from your Android device using this address.

To help troubleshoot other potential issues: How did you generate the HTTPS certificate? If you used a self-signed certificate, you need to add your CA certificate to the trusted store on your Android device. For local network IP addresses, you can use the project's CA certificate as described here: https://docs.sms-gate.app/services/ca/

If issues persist, please check the app logs and also attach the JSON logs retrieved from the local server as described in the documentation: https://docs.sms-gate.app/features/logging/

[pnfstas]

Hello!
Thanks for the detailed answer. My PHP script is on the desktop. Yes, I used the built-in IIS self-signed certificate. I tried to follow your recommendations: registered a webhook on https://127.0.0.1:443/MyApp/ReceiveWebhooks.php using localhost IP address, exported IIS certificate with the private key to my Android device. But all these steps did not solve the problem. Log is attached.
SMS GateWay for Android Log

[capcom6]

Hello!

127.0.0.1 is a loopback address that always refers to the local device itself. When used on your Android device, it points back to that Android phone, not to your desktop computer. This is a fundamental networking concept that's important to understand.

Since your PHP script is running on your desktop, you need to use your desktop's actual IP address on your local network (e.g., 192.168.1.100 or similar) rather than localhost or 127.0.0.1. Your Android device and desktop must be on the same network, and the desktop's firewall must allow incoming connections on port 443.

I'd recommend that you take the time to learn about network addressing. Because the problem is not with the app, but with your network infrastructure.

[pnfstas]

Hello, @capcom6!
Thanks for reply. I got correct ip-address of localhost from ipconfig and registered a webhook to that address. After that, the error message in the logs changed to "Webhook failed with retry: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found"
As I understand, I cannot use a self-signed certificate for this purpose and I need to use your project's certificate.

[capcom6]

It is possible, but in this case you need to add your root CA certificate to the Android Trust Store.

However, it is recommended to use the project CA, as its root certificate is already embedded in the application. See https://docs.sms-gate.app/faq/webhooks/#how-to-use-webhooks-with-a-self-signed-certificate