MVC+API+认证服务器项目结构咨询：是否需独立令牌服务？

Great question! Let’s break this down clearly for you—you don’t need to add a third standalone token service project unless you have specific future scaling needs. Here are your two main options, tailored to your current MVC + Web API setup:

Option 1: Embed Token Logic into Your Existing MVC Project (Best for Small-to-Mid Projects) #

Since your MVC app already handles user login, you can extend it to act as both the OpenID Connect identity provider and OAuth 2.0 token issuer. This avoids extra project overhead and keeps your auth flow tightly integrated.

Step-by-Step Implementation Example #

1. Ensure ASP.NET Core Identity is set up (if it isn’t already) — this gives you the base user management system.
2. Configure OpenID Connect + OAuth in your MVC app’s Program.cs:

   builder.Services.AddAuthorization();
   builder.Services.AddAuthentication(options =>
   {
       options.DefaultScheme = CookieAuthenticationDefaults.AuthenticationScheme;
       options.DefaultChallengeScheme = OpenIdConnectDefaults.AuthenticationScheme;
   })
   .AddCookie()
   .AddOpenIdConnect(options =>
   {
       options.Authority = "https://localhost:5001"; // Your MVC app's URL
       options.ClientId = "mvc-internal-client";
       options.ClientSecret = "your-secure-client-secret";
       options.ResponseType = "code";
       options.Scope.Add("api-access"); // Define the scope for your Web API
       options.SaveTokens = true; // Store tokens in the auth cookie for later use
   });
   

3. Add a token endpoint in your MVC app to issue JWT tokens for API access:

   [ApiController]
   [Route("api/token")]
   public class TokenController : ControllerBase
   {
       private readonly UserManager<IdentityUser> _userManager;
       private readonly IConfiguration _config;
   
       public TokenController(UserManager<IdentityUser> userManager, IConfiguration config)
       {
           _userManager = userManager;
           _config = config;
       }
   
       [HttpPost]
       [Authorize] // Only logged-in users can request tokens
       public async Task<IActionResult> GenerateApiToken()
       {
           var currentUser = await _userManager.GetUserAsync(User);
           if (currentUser == null) return Unauthorized();
   
           // Build claims including the user ID (your second requirement)
           var claims = new List<Claim>
           {
               new Claim(ClaimTypes.NameIdentifier, currentUser.Id),
               new Claim(ClaimTypes.Name, currentUser.UserName)
               // Add any other claims your API needs
           };
   
           // Create and sign the JWT token
           var securityKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_config["Jwt:SecretKey"]));
           var signingCreds = new SigningCredentials(securityKey, SecurityAlgorithms.HmacSha256);
   
           var token = new JwtSecurityToken(
               issuer: _config["Jwt:Issuer"],
               audience: _config["Jwt:ApiAudience"],
               claims: claims,
               expires: DateTime.UtcNow.AddHours(1),
               signingCredentials: signingCreds);
   
           return Ok(new { access_token = new JwtSecurityTokenHandler().WriteToken(token) });
       }
   }
   

4. Configure your Web API to validate JWT tokens:
   In the API’s Program.cs, add JWT authentication:

   builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
       .AddJwtBearer(options =>
       {
           options.TokenValidationParameters = new TokenValidationParameters
           {
               ValidateIssuer = true,
               ValidateAudience = true,
               ValidateLifetime = true,
               ValidateIssuerSigningKey = true,
               ValidIssuer = builder.Configuration["Jwt:Issuer"],
               ValidAudience = builder.Configuration["Jwt:ApiAudience"],
               IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(builder.Configuration["Jwt:SecretKey"]))
           };
       });
   
   // Don't forget to enable authentication/authorization middleware
   app.UseAuthentication();
   app.UseAuthorization();
   

   Then protect your API endpoints with [Authorize], and access the user ID like this:

   [Authorize]
   [ApiController]
   [Route("api/data")]
   public class DataController : ControllerBase
   {
       [HttpGet]
       public IActionResult GetUserData()
       {
           var userId = User.FindFirst(ClaimTypes.NameIdentifier)?.Value;
           // Use userId to fetch user-specific data
           return Ok(new { UserId = userId });
       }
   }
   

5. Call the API from MVC:
   Retrieve the saved token from the auth cookie and attach it to your API requests:

   var accessToken = await HttpContext.GetTokenAsync("access_token");
   var client = new HttpClient();
   client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
   var apiResponse = await client.GetAsync("https://localhost:5002/api/data");
   

Option 2: Use a Standalone Token Service (Best for Large/Scalable Systems) #

If you plan to add more clients later (e.g., mobile apps, other web apps) or need advanced auth features (multi-tenancy, social login), a standalone token service makes sense. Tools like Duende IdentityServer (formerly IdentityServer4) let you quickly build a dedicated auth server. In this case, your MVC app acts as an OpenID Connect client, and your Web API acts as a resource server—both rely on the standalone service for tokens and auth validation.

But for your current use case (just MVC + API), Option 1 is simpler and avoids unnecessary complexity.

Key Security Notes #

• Always use HTTPS to transmit tokens.
• Keep your JWT signing key secure (store it in secrets manager, not plaintext config).
• Set reasonable token expiration times (1-2 hours is standard) and implement refresh tokens if needed.

内容的提问来源于stack exchange，提问作者Jeremy