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using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;
using Microsoft.IdentityModel.Tokens;
using System;
using System.Threading.Tasks;
using Timeline.Models.Http;
using Timeline.Services;
using Timeline.Helpers;
namespace Timeline
{
public static partial class ErrorCodes
{
public static partial class Http
{
public static class Token // bbb = 001
{
public static class Create // cc = 01
{
public const int BadCredential = 10010101;
}
public static class Verify // cc = 02
{
public const int BadFormat = 10010201;
public const int UserNotExist = 10010202;
public const int OldVersion = 10010203;
public const int Expired = 10010204;
}
}
}
}
}
namespace Timeline.Controllers
{
[Route("token")]
[ApiController]
public class TokenController : Controller
{
private readonly IUserService _userService;
private readonly ILogger<TokenController> _logger;
private readonly IClock _clock;
public TokenController(IUserService userService, ILogger<TokenController> logger, IClock clock)
{
_userService = userService;
_logger = logger;
_clock = clock;
}
[HttpPost("create")]
[AllowAnonymous]
public async Task<IActionResult> Create([FromBody] CreateTokenRequest request)
{
void LogFailure(string reason, Exception? e = null)
{
_logger.LogInformation(e, Log.Format("Attemp to login failed.",
("Reason", reason),
("Username", request.Username),
("Password", request.Password),
("Expire (in days)", request.Expire)
));
}
try
{
DateTime? expireTime = null;
if (request.Expire != null)
expireTime = _clock.GetCurrentTime().AddDays(request.Expire.Value);
var result = await _userService.CreateToken(request.Username, request.Password, expireTime);
_logger.LogInformation(Log.Format("Attemp to login succeeded.",
("Username", request.Username),
("Expire At", expireTime?.ToString() ?? "default")
));
return Ok(new CreateTokenResponse
{
Token = result.Token,
User = result.User
});
}
catch (UserNotExistException e)
{
LogFailure("User does not exist.", e);
return BadRequest(new CommonResponse(ErrorCodes.Http.Token.Create.BadCredential,
"Bad username or password."));
}
catch (BadPasswordException e)
{
LogFailure("Password is wrong.", e);
return BadRequest(new CommonResponse(ErrorCodes.Http.Token.Create.BadCredential,
"Bad username or password."));
}
}
[HttpPost("verify")]
[AllowAnonymous]
public async Task<IActionResult> Verify([FromBody] VerifyTokenRequest request)
{
void LogFailure(string reason, Exception? e = null, params (string, object?)[] otherProperties)
{
var properties = new (string, object)[2 + otherProperties.Length];
properties[0] = ("Reason", reason);
properties[1] = ("Token", request.Token);
otherProperties.CopyTo(properties, 2);
_logger.LogInformation(e, Log.Format("Token verification failed.", properties));
}
try
{
var result = await _userService.VerifyToken(request.Token);
_logger.LogInformation(Log.Format("Token verification succeeded.",
("Username", result.Username), ("Token", request.Token)));
return Ok(new VerifyTokenResponse
{
User = result
});
}
catch (JwtTokenVerifyException e)
{
if (e.ErrorCode == JwtTokenVerifyException.ErrorCodes.Expired)
{
const string message = "Token is expired.";
var innerException = e.InnerException as SecurityTokenExpiredException;
LogFailure(message, e, ("Expires", innerException?.Expires), ("Current Time", _clock.GetCurrentTime()));
return BadRequest(new CommonResponse(ErrorCodes.Http.Token.Verify.Expired, message));
}
else
{
const string message = "Token is of bad format.";
LogFailure(message, e);
return BadRequest(new CommonResponse(ErrorCodes.Http.Token.Verify.BadFormat, message));
}
}
catch (UserNotExistException e)
{
const string message = "User does not exist. Administrator might have deleted this user.";
LogFailure(message, e);
return BadRequest(new CommonResponse(ErrorCodes.Http.Token.Verify.UserNotExist, message));
}
catch (BadTokenVersionException e)
{
const string message = "Token has an old version.";
LogFailure(message, e, ("Token Version", e.TokenVersion), ("Required Version", e.RequiredVersion));
return BadRequest(new CommonResponse(ErrorCodes.Http.Token.Verify.OldVersion, message));
}
}
}
}
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