public class LoginRequestDTO { [Required] [JsonProperty("username")] public string Username { get; set; } [Required] [JsonProperty("password")] public string Password { get; set; } }
[Route("api/[controller]")] [ApiController] public class AuthenticationController : ControllerBase { [AllowAnonymous] [HttpPost, Route("requestToken")] public ActionResult RequestToken([FromBody] LoginRequestDTO request) { if (!ModelState.IsValid) { return BadRequest("Invalid Request"); } return Ok(); } }
目前上面的控制器只实现了基本的逻辑，下面我们要创建签发token的服务，去完成具体的业务。第一步我们先创建对应的服务接口，命名为 IAuthenticateService
public interface IAuthenticateService { bool IsAuthenticated(LoginRequestDTO request, out string token); }
接下来，实现接口
public class TokenAuthenticationService : IAuthenticateService { public bool IsAuthenticated(LoginRequestDTO request, out string token) { throw new NotImplementedException(); } }
在 Startup 的 ConfigureServices 方法中注册服务
services.AddScoped<IAuthenticateService, TokenAuthenticationService>();
在Controller中注入IAuthenticateService服务，并完善action
public class AuthenticationController : ControllerBase { private readonly IAuthenticateService _authService; public AuthenticationController(IAuthenticateService authService) { this._authService = authService; } [AllowAnonymous] [HttpPost, Route("requestToken")] public ActionResult RequestToken([FromBody] LoginRequestDTO request) { if (!ModelState.IsValid) { return BadRequest("Invalid Request"); } string token; if (_authService.IsAuthenticated(request, out token)) { return Ok(token); } return BadRequest("Invalid Request"); } }
正常情况，我们都会根据请求的用户和密码去验证用户是否合法，需要连接到数据库获取数据进行校验，我们这里为了方便，假设任何请求的用户都是合法的。
这里单独加个用户管理的服务，不在IAuthenticateService这个服务里面添加相应逻辑，主要遵循了 职责单一原则 。首先和上面一样，创建一个服务接口 IUserService
public interface IUserService { bool IsValid(LoginRequestDTO req); }
实现 IUserService 接口
public class UserService : IUserService { //模拟测试，默认都是人为验证有效 public bool IsValid(LoginRequestDTO req) { return true; } }
同样注册到容器中
services.AddScoped<IUserService, UserService>();
接下来，就要完善TokenAuthenticationService签发token的逻辑，首先要注入IUserService 和 TokenManagement，然后实现具体的业务逻辑，这个token的生成还是使用的Jwt的类库提供的api，具体不详细描述。
特别注意下TokenManagement的注入是已IOptions的接口类型注入的，还记得在Startpup中吗？我们是通过配置项的方式注册TokenManagement类型的。
public class TokenAuthenticationService : IAuthenticateService { private readonly IUserService _userService; private readonly TokenManagement _tokenManagement; public TokenAuthenticationService(IUserService userService, IOptions<TokenManagement> tokenManagement) { _userService = userService; _tokenManagement = tokenManagement.Value; } public bool IsAuthenticated(LoginRequestDTO request, out string token) { token = string.Empty; if (!_userService.IsValid(request)) return false; var claims = new[] { new Claim(ClaimTypes.Name,request.Username) }; var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_tokenManagement.Secret)); var credentials = new SigningCredentials(key, SecurityAlgorithms.HmacSha256); var jwtToken = new JwtSecurityToken(_tokenManagement.Issuer, _tokenManagement.Audience, claims, expires: DateTime.Now.AddMinutes(_tokenManagement.AccessExpiration), signingCredentials: credentials); token = new JwtSecurityTokenHandler().WriteToken(jwtToken); return true; } }
准备好测试试用的APi，打上Authorize特性，表明需要授权！
[ApiController] [Route("[controller]")] [Authorize] public class WeatherForecastController : ControllerBase { private static readonly string[] Summaries = new[] { "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching" }; private readonly ILogger<WeatherForecastController> _logger; public WeatherForecastController(ILogger<WeatherForecastController> logger) { _logger = logger; } [HttpGet] public IEnumerable<WeatherForecast> Get() { var rng = new Random(); return Enumerable.Range(1, 5).Select(index => new WeatherForecast { Date = DateTime.Now.AddDays(index), TemperatureC = rng.Next(-20, 55), Summary = Summaries[rng.Next(Summaries.Length)] }) .ToArray(); } }
支持我们可以测试验证了，我们可以使用postman来进行http请求，先启动http服务，获取url，先测试一个访问需要授权的接口，但没有携带token信息，返回是401，表示未授权
