58 lines
2.0 KiB
C#
58 lines
2.0 KiB
C#
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namespace TomatenMusic_Api.Auth.Helpers;
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using Microsoft.Extensions.Options;
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using Microsoft.IdentityModel.Tokens;
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using System.IdentityModel.Tokens.Jwt;
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using System.Text;
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using TomatenMusic_Api.Auth.Services;
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public class JwtMiddleware
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{
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private readonly RequestDelegate _next;
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private readonly AppSettings _appSettings;
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public JwtMiddleware(RequestDelegate next, IOptions<AppSettings> appSettings)
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{
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_next = next;
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_appSettings = appSettings.Value;
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}
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public async Task Invoke(HttpContext context, IUserService userService)
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{
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var token = context.Request.Headers["Authorization"].FirstOrDefault()?.Split(" ").Last();
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if (token != null)
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attachUserToContext(context, userService, token);
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await _next(context);
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}
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private void attachUserToContext(HttpContext context, IUserService userService, string token)
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{
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try
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{
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var tokenHandler = new JwtSecurityTokenHandler();
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var key = Encoding.ASCII.GetBytes(_appSettings.Secret);
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tokenHandler.ValidateToken(token, new TokenValidationParameters
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{
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ValidateIssuerSigningKey = true,
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IssuerSigningKey = new SymmetricSecurityKey(key),
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ValidateIssuer = false,
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ValidateAudience = false,
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// set clockskew to zero so tokens expire exactly at token expiration time (instead of 5 minutes later)
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ClockSkew = TimeSpan.Zero
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}, out SecurityToken validatedToken);
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var jwtToken = (JwtSecurityToken)validatedToken;
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var userId = int.Parse(jwtToken.Claims.First(x => x.Type == "id").Value);
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// attach user to context on successful jwt validation
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context.Items["User"] = userService.GetById(userId);
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}
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catch
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{
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// do nothing if jwt validation fails
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// user is not attached to context so request won't have access to secure routes
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}
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}
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}
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