.NetCore【中间件】跨域CORS

CORS

前后端分离部署需要跨域设置

Core中如何设置CORS

1. 中间件

using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;

namespace Thomerson.Gatlin.Midware
{
    /// <summary>
    /// 跨域设置
    /// </summary>
    public static class CORSMidware
    {
        public static readonly string PolicyName = "AppDomain";


        public static IServiceCollection AddCorsMidware(this IServiceCollection services)
        {
            services.AddCors(options =>
            {
                options.AddPolicy(PolicyName, builder =>
                {
                    builder
                    //.WithOrigins("http://127.0.0.1:65356", "http://localhost:65356")
                    .AllowAnyOrigin() // Allow access to any source from the host
                    .AllowAnyMethod()        // Ensures that the policy allows any method
                    .AllowAnyHeader()        // Ensures that the policy allows any header
                    .AllowCredentials();     // Specify the processing of cookie
                });
            });
            return services;
        }

        public static IApplicationBuilder UseCORSMidware(this IApplicationBuilder app)
        {
            app.UseCors(PolicyName);//必须位于UserMvc之前 
            return app;
        }
    }
}

2. startup中配置中间件

            //跨域设置
            services.AddCorsMidware();

            //全局的跨域设置  必须位于UserMvc之前 
            app.UseCORSMidware();

3. API如何设置可跨域

Controller中加上EnableCors特性

using Microsoft.AspNetCore.Cors;
using Microsoft.AspNetCore.Mvc;

namespace Thomerson.Gatlin.Controllers
{
    /// <summary>
    /// Base API Controller
    /// </summary>
    [Route("api/[controller]")]
    [ApiController]
    [EnableCors("AppDomain")]  //路由跨域设置  AppDomain = CORSMidware.PolicyName
    public class BaseAPIController : ControllerBase
    {

    }
}

源码