生成 Token

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using System.Threading.Tasks;   namespace Microsoft.eShopWeb.ApplicationCore.Interfaces;   public interface ITokenClaimsService {     Task<string> GetTokenAsync(string userName); }

　　

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using System; using System.Collections.Generic; using System.IdentityModel.Tokens.Jwt; using System.Security.Claims; using System.Text; using System.Threading.Tasks; using Microsoft.AspNetCore.Identity; using Microsoft.eShopWeb.ApplicationCore.Constants; using Microsoft.eShopWeb.ApplicationCore.Interfaces; using Microsoft.IdentityModel.Tokens;   namespace Microsoft.eShopWeb.Infrastructure.Identity;   public class IdentityTokenClaimService : ITokenClaimsService {     private readonly UserManager<ApplicationUser> _userManager;       public IdentityTokenClaimService(UserManager<ApplicationUser> userManager)     {         _userManager = userManager;     }       public async Task<string> GetTokenAsync(string userName)     {         var tokenHandler = new JwtSecurityTokenHandler();         var key = Encoding.ASCII.GetBytes(AuthorizationConstants.JWT_SECRET_KEY);         var user = await _userManager.FindByNameAsync(userName);         var roles = await _userManager.GetRolesAsync(user);         var claims = new List<Claim> { new Claim(ClaimTypes.Name, userName) };           foreach (var role in roles)         {             claims.Add(new Claim(ClaimTypes.Role, role));         }           var tokenDescriptor = new SecurityTokenDescriptor         {             Subject = new ClaimsIdentity(claims.ToArray()),             Expires = DateTime.UtcNow.AddDays(7),             SigningCredentials = new SigningCredentials(new SymmetricSecurityKey(key), SecurityAlgorithms.HmacSha256Signature)         };         var token = tokenHandler.CreateToken(tokenDescriptor);         return tokenHandler.WriteToken(token);     } }

参考：eShopWeb