jwt实现登录 和 接口实现动态权限

 [Authorize]   ====   using Microsoft.AspNetCore.Authorization;  

登录的 DTO

namespace login;

public class WeatherForecast
{
    public DateOnly Date { get; set; }

    public int TemperatureC { get; set; }

    public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);

    public string? Summary { get; set; }
}

program.cs 实现 jwt 注册

using Microsoft.IdentityModel.Tokens;
using System.Text;
using Microsoft.AspNetCore.Authentication.JwtBearer;
var builder = WebApplication.CreateBuilder(args);

// Add services to the container.

builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
    .AddJwtBearer(options =>
    {
        //取出私钥
        var secretByte = Encoding.UTF8.GetBytes(builder.Configuration["Authentication:SecretKey"]);
        options.TokenValidationParameters = new TokenValidationParameters()
        {
            //验证发布者
            ValidateIssuer = true,
            ValidIssuer = builder.Configuration["Authentication:Issuer"],
            //验证接收者
            ValidateAudience = true,
            ValidAudience = builder.Configuration["Authentication:Audience"],
            //验证是否过期
            ValidateLifetime = true,
            //验证私钥
            IssuerSigningKey = new SymmetricSecurityKey(secretByte)
        };
    });

var app = builder.Build();
//添加jwt验证
app.UseAuthentication();
app.UseAuthorization();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseHttpsRedirection();

app.UseAuthorization();

app.MapControllers();

app.Run();

csproj 依赖管理

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>net7.0</TargetFramework>
    <Nullable>enable</Nullable>
    <ImplicitUsings>enable</ImplicitUsings>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="7.0.17-preview.2.24128.4" />
    <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="7.0.10" />
    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0" />
  </ItemGroup>

</Project>

appsetting.json

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "AllowedHosts": "*",
  "Authentication": {
    "SecretKey": "nadjhfgkadshgoihfkajhkjdhsfaidkuahfhdksjaghidshyaukfhdjks",
    "Issuer": "www.adsfsadfasdf",
    "Audience": "www.adsfsadfasdf"
  }
}

Controller 控制器：

using Microsoft.AspNetCore.Mvc;
using login.Dtos;
using Microsoft.IdentityModel.Tokens;
using System.Security.Claims;
using Microsoft.AspNetCore.Authorization;
using System.IdentityModel.Tokens.Jwt;
using System.Text;
namespace login.Controllers;

[ApiController]
[Route("[controller]")]
public class WeatherForecastController : ControllerBase
{
    private static readonly string[] Summaries = new[]
    {
        "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
    };
    public readonly IConfiguration _configuration;
    private readonly ILogger<WeatherForecastController> _logger;

    public WeatherForecastController(ILogger<WeatherForecastController> logger, IConfiguration configuration)
    {
        _logger = logger;
        _configuration = configuration;
    }
    [HttpPost("testLogin")]
    public IActionResult Login([FromBody] LoginDto loginDto)
    {
        //1.验证用户账号密码是否正确，暂时忽略，因为我们是模拟登录
        //2.生成JWT
        //Header,选择签名算法
        var signingAlogorithm = SecurityAlgorithms.HmacSha256;
        System.Console.WriteLine("算法");
        System.Console.WriteLine(signingAlogorithm);
        var claims = new[]
          {
                new Claim(JwtRegisteredClaimNames.Sub,"user_id"),
                new Claim(ClaimTypes.Role,"admin")
            };
        //取出私钥并以utf8编码字节输出
        var secretByte = Encoding.UTF8.GetBytes(_configuration["Authentication:SecretKey"]);
        //使用非对称算法对私钥进行加密
        var signingKey = new SymmetricSecurityKey(secretByte);
        //使用HmacSha256来验证加密后的私钥生成数字签名
        var signingCredentials = new SigningCredentials(signingKey, signingAlogorithm);
        //生成Token
        var Token = new JwtSecurityToken(
                issuer: _configuration["Authentication:Issuer"],        //发布者
                audience: _configuration["Authentication:Audience"],    //接收者
                claims: claims,                                         //存放的用户信息
                notBefore: DateTime.UtcNow,                        //发布时间
                expires: DateTime.UtcNow.AddDays(1),                      //有效期设置为1天
                signingCredentials                                      //数字签名
            );
        //生成字符串 token
        var TokenStr = new JwtSecurityTokenHandler().WriteToken(Token);
        return Ok(TokenStr);
    }

/// <summary>
/// [Authorize(Roles = "admin")] 需要验证token  只允许 admin 角色使用
/// </summary>
/// <returns></returns>
    [HttpGet(Name = "GetWeatherForecast")]
    [Authorize(Roles = "admin")]
    public IEnumerable<WeatherForecast> Get()
    {
        return Enumerable.Range(1, 5).Select(index => new WeatherForecast
        {
            Date = DateOnly.FromDateTime(DateTime.Now.AddDays(index)),
            TemperatureC = Random.Shared.Next(-20, 55),
            Summary = Summaries[Random.Shared.Next(Summaries.Length)]
        })
        .ToArray();
    }
}

实现基于jwt登录