如何生成动态 json 响应答案

【问题标题】：How to generate a a dynamic json response如何生成动态 json 响应
【发布时间】：2021-06-17 21:40:15
【问题描述】：

我在下面的代码中给出了 IActionResult 登录方法，这是这里的主要重点。我想在发布此方法后返回特定类型的响应。响应应该看起来像这样......

{  
 "token" : Token Id must be displayed here,          
 "user" : {                   
    UserName : user name must appear here                   
    UserRole : user role appears here
  }
}

当我使用（例如）用户名 -> 管理员和密码 -> 1234 登录时，它必须从与给定凭据匹配的列表中提取用户名和用户角色。请帮帮我，我对 ASP.NET 有点陌生。

[ApiController]
[Route("api/LoginController")]
public class LoginController : Controller
{
    private readonly IList<Credential> appUsers = new List<Credential>
                    {
                          new Credential { FullName = "Admin User", UserName = "admin", Password = "1234", UserRole = "Admin" },
                          new Credential { FullName = "Test User", UserName = "user", Password = "1234", UserRole = "User" }
                   };

    [HttpPost]
    [AllowAnonymous]
    public IActionResult Login(Credential credential)
    {
        var user = appUsers.FirstOrDefault(x => x.UserName == credential.UserName && x.Password == credential.Password);
        if (user != null)
        {
            var tokenString = GenerateJWTToken(user);
            
            var response = new { token = tokenString };
            return Ok(response);
        }
        else
        {
            string message = "enter correct credentials";
            return Ok(message);
        }
    }

    private string GenerateJWTToken(Credential credential)
    {
        const string ENCRYPTION_KEY = "xecretKeywqejane";
        const string JWT_ISSUER = "https://localhost:44331/";             
        const string JWT_AUDIENCE = "https://localhost:44331/";           

        var securityKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(ENCRYPTION_KEY));
        var signingCredentials = new SigningCredentials(securityKey, SecurityAlgorithms.HmacSha256);

        
        var claims = new[]
        {
                          new Claim (JwtRegisteredClaimNames.Sub, credential.UserName),
                          new Claim ("fullName", credential.FullName),
                          new Claim ("role", credential.UserRole),
                          new Claim (JwtRegisteredClaimNames.Jti, Guid.NewGuid().ToString()),
                    };

        var token = new JwtSecurityToken(
              issuer: JWT_ISSUER,
              audience: JWT_AUDIENCE,
              claims: claims,
              expires: DateTime.Now.AddMinutes(30),
              signingCredentials: signingCredentials
        );

        return new JwtSecurityTokenHandler().WriteToken(token);
    }
}

}

【问题讨论】：

标签： asp.net asp.net-web-api jwt webapi

【解决方案1】：

你快到了。 Ok() 将发回模型的 JSON 序列化版本并获取匿名对象。所以基本上你需要返回以下内容

return Ok(new
{
    token = "",
    user = new
    {
        UserName = "",
        UserRole = ""
    }
});

【讨论】：

像魅力一样工作，非常感谢！

【解决方案2】：

您还可以定义新的响应类。

public class ResponseDto
{
    public string Token {get; set;}
    public User User {get; set;}
}

public class User 
{
    public string UserName {get; set;}
    public string UserRole {get; set;}
}

return Ok(new ResponseDto()
{
    Token = tokenString,
    User = new User()
    {
        UserName = user.UserName,
        UserRole = User.UserRole
    }
});

【讨论】：