var builder = WebApplication.CreateBuilder(args);

// 添加 CORS 服务

builder.Services.AddCors(options =>

{

   options.AddDefaultPolicy(policy =>

   {

      policy.WithOrigins("https://your-frontend.com") // 允许的前端域名

          .AllowAnyHeader()

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          .AllowAnyMethod();

   });

});

// 注册其他服务...

var app = builder.Build();

// 启用 CORS 中间件

app.UseCors();

builder.Services.AddCors(options =>

{

   options.AddPolicy("AllowLocalFrontend", policy =>

   {

      policy.WithOrigins("http://localhost:3000")

          .AllowAnyHeader()

          .AllowAnyMethod();

   });

   options.AddPolicy("ProductionFrontend", policy =>

   {

      policy.WithOrigins("https://example.com")

          .WithHeaders("Authorization", "Content-Type")

          .WithMethods("GET", "POST");

   });

});

app.UseCors("AllowLocalFrontend");

policy.AllowAnyOrigin()

    .AllowAnyHeader()

    .AllowAnyMethod();

[EnableCors("AllowLocalFrontend")]

public class WeatherController : ControllerBase

[DisableCors]

[HttpGet("no-cors")]

public IActionResult NoCors() => Ok();