Outline

Solution: Exception Handling

In the Conduit.Models Project

Add a new class in the Exceptions Namespace

Name it LoginFailedException
Inherits from Exception
Add a constructor with a message parameter type string
Pass the parameter to the base class

In the Conduit.Api Project

Modify UsersController.LoginAsync Method

Add a try...catch block around the existing code
- Catch an Exception
- Log the error
- Return a 500
Add a second catch block
- Catch the LoginFailedException
- Log the warning
- Return a 400 or a 422

Here's the code for the LoginFailedException.cs File:

using System;

namespace Conduit.Models.Exceptions
{
    public class LoginFailedException : Exception
    {
        public LoginFailedException(string message) : base(message)
        {

        }
    }
}

Here is the code for the LoginAsync Method in the UsersController.cs File:

        [HttpPost("login")]
        public async Task<IActionResult> LoginAsync([FromBody] UserRequest<Login> req)
        {
            try
            {
                User user = await AccountRepo.LoginAsync(req.User).ConfigureAwait(false);
                return Ok(new { user });
            }
            catch (LoginFailedException ex)
            {
                Logger.LogWarning(ex.Message, ex);
                return StatusCode(422, ex.ToDictionary());
            }
            catch (Exception e)
            {
                Logger.LogError(e.Message, e);
                return StatusCode(500, e.Message);
            }
        }

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Solution - Exception Handling

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Outline

Outline

Solution: Exception Handling