Error 500.30 when publishing WTelegramClient app to Azure

Question

I've made a web app in .NET 6.0 using WTelegramClient. It works fine locally but when I try to publish it to Azure App Service i obtain the following error: HTTP Error 500.30 - ASP.NET Core app failed to start

I tried to remove WTelegramClient initialization from app and it works fine on Azure too.

This is my Config function:

public static string Config(string what)
        {   
            switch (what)
            {
                case "api_id": return Instance.m_oTgConfig.api_id;
                case "api_hash": return Instance.m_oTgConfig.api_hash;
                case "phone_number": return Instance.m_oTgConfig.phone_number;
                case "verification_code": Console.Write("Code: "); return Console.ReadLine();
                case "first_name": return Instance.m_oTgConfig.first_name;    // if sign-up is required
                case "last_name": return Instance.m_oTgConfig.last_name;        // if sign-up is required
                case "password": return Instance.m_oTgConfig.password;     // if user has enabled 2FA
                case "session_pathname": return "/WTelegram.session";
                default: return null; // let WTelegramClient decide the default config
            }
        }

Am I doing somethin wrong with the .session file?

I think that the problem is that I must to insert verification_code (telegram OTP) by hand from the console. In local I do it from the console. How can I do the same thing in Azure? If I run MyApp.exe from Azure's console it do not ask anything.

In Azure, you need to enable logging in web.config file - through Kudu services - and investigate the stack trace in the log file produced after you try to publish the app. I don't think this question has enough details to give proper solution — Yehor Androsov, Mar 16 '23 at 14:41
Most likely, your appsettings.json is missing some parameters because of the environment. You could try to start with publishing application in Development configuration to see if it works — Yehor Androsov, Mar 16 '23 at 14:45
In azure app configuration check if the process is set to 64 bit . Try changing it, then restarting the app — thanzeel, Mar 16 '23 at 14:50
If I run MyApp.exe from Azure console i obtain: Unhandled exception: System.ApplicationException: You must provide a config value for verification_code. How do I insert my verification code from console if it do not ask for it? — grrfnc, Mar 16 '23 at 15:32

score 0 · Answer 1 · answered Mar 17 '23 at 00:06

See WTelegramClient ASP.NET example for how to login & prompt for the verification_code interactively via a web page.

Make also sure session_pathname points inside a directory where you have read/write access so the session file can get saved there.

And before further questions, please read the ReadMe file and the FAQ page as they both answer your issue

Error 500.30 when publishing WTelegramClient app to Azure

1 Answers1