Tasklist Debugging

Example repository for debugging learning from this video

Here are two problems in this example code. Let's examine bug reports and fix them.

Problem: Bug during login

Description

When I try to register user, it is registered. When I try to login to this user, I see "Unauthorized1" from ApplicationConfig:60.

Steps to reproduce:

1. Run docker compose up to run a database
2. Run application
3. Register user - POST request to http://localhost:8080/api/v1/auth/register with JSON body:

{
    "name": "mark",
    "username": "markov",
    "password": "12345",
    "passwordConfirmation": "12345"
}

4. Login to this user - POST request to http://localhost:8080/api/v1/auth/login with JSON body:

{
    "username": "mark
    "password": "12345"
}

5. See "Unauthorized1"

Expected behavior

Get JwtResponse object with tokens.

Actual behavior

Get Unauthorized1

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Try to solve this problem during debugging process. I have some hints for you:

1. Create @RestControllerAdvice class, handle exception and print stack trace
2. Find causes and code lines in stack trace
3. Fix the first problem in UserRowMapper
4. You need to add if (resultSet.next()) { just before line user.setId(resultSet.getLong("user_id"));
5. Try to login again - you get new exception
6. Fix the second problem in JwtTokenProvider. See actual code here
7. Try to login again - all should work!

See this video for more details.