.NET 11 中 ASP.NET Core 10 在分布式系统中的安全通信与性能调优

using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.IdentityModel.Tokens;
using System.Text;

public void ConfigureServices(IServiceCollection services)
{
    var key = Encoding.UTF8.GetBytes("your - secret - key");
    services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
      .AddJwtBearer(options =>
       {
           options.TokenValidationParameters = new TokenValidationParameters
           {
               ValidateIssuer = true,
               ValidateAudience = true,
               ValidateLifetime = true,
               ValidateIssuerSigningKey = true,
               ValidIssuer = "your - issuer",
               ValidAudience = "your - audience",
               IssuerSigningKey = new SymmetricSecurityKey(key)
           };
       });
    services.AddAuthorization();
    services.AddControllers();
}

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    app.UseAuthentication();
    app.UseAuthorization();
    app.UseEndpoints(endpoints =>
    {
        endpoints.MapControllers();
    });
}

- **启用 HTTPS**：在 `Startup.cs` 中配置 HTTPS。

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }
    else
    {
        app.UseHsts();
    }
    app.UseHttpsRedirection();
    // 其他中间件配置
}

- **服务间认证与授权**：创建一个简单的授权策略，限制特定微服务对资源的访问。

public void ConfigureServices(IServiceCollection services)
{
    services.AddAuthorization(options =>
    {
        options.AddPolicy("MicroservicePolicy", policy =>
            policy.RequireClaim("microservice - claim", "allowed - microservice - value"));
    });
    // 其他服务配置
}

[Authorize(Policy = "MicroservicePolicy")]
[ApiController]
[Route("[controller]")]
public class SecureController : ControllerBase
{
    [HttpGet]
    public IActionResult Get()
    {
        return Ok("This is a secure resource.");
    }
}

dotnet add package Microsoft.Extensions.Caching.StackExchangeRedis

public void ConfigureServices(IServiceCollection services)
{
    services.AddStackExchangeRedisCache(options =>
    {
        options.Configuration = "localhost:6379";
        options.InstanceName = "SampleInstance";
    });
    services.AddControllers();
}

[ApiController]
[Route("[controller]")]
public class CachedController : ControllerBase
{
    private readonly IDistributedCache _cache;

    public CachedController(IDistributedCache cache)
    {
        _cache = cache;
    }

    [HttpGet]
    public async Task<IActionResult> Get()
    {
        string cacheKey = "example - key";
        byte[] cachedData = await _cache.GetAsync(cacheKey);
        if (cachedData != null)
        {
            string result = Encoding.UTF8.GetString(cachedData);
            return Ok(result);
        }
        else
        {
            string dataToCache = "This is data to be cached.";
            await _cache.SetAsync(cacheKey, Encoding.UTF8.GetBytes(dataToCache));
            return Ok(dataToCache);
        }
    }
}

- **异步编程与并行处理**：编写一个异步处理请求的控制器方法，并使用并行处理。

[ApiController]
[Route("[controller]")]
public class AsyncController : ControllerBase
{
    [HttpGet]
    public async Task<IActionResult> Get()
    {
        var tasks = new List<Task<int>>();
        for (int i = 0; i < 5; i++)
        {
            tasks.Add(ProcessTaskAsync(i));
        }
        var results = await Task.WhenAll(tasks);
        return Ok(results.Sum());
    }

    private async Task<int> ProcessTaskAsync(int taskId)
    {
        await Task.Delay(1000); // 模拟异步操作
        return taskId * taskId;
    }
}

- **健康检查与负载均衡**：在 `Startup.cs` 中配置健康检查。

public void ConfigureServices(IServiceCollection services)
{
    services.AddHealthChecks();
    services.AddControllers();
}

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    app.UseHealthChecks("/health");
    // 其他中间件配置
}