为ASP.NET core 2.0 web api启用CORS [英] Enable CORS for ASP.NET core 2.0 web api

问题描述

我使用ASP.Net Core 2.0创建了一个Web API，其中我实现了启用CORS的代码，如下所示：

I've created a Web API using ASP.Net Core 2.0 wherein I've implemented code for enabling CORS as given below:

// This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddCors(options =>
            {
                options.AddPolicy("AllowFromAll",
                    builder => builder
                    .WithMethods("GET", "POST")
                    .AllowAnyOrigin()
                    .AllowAnyHeader());
            }); ;

        
            services.AddMvc();
           
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            app.UseCors("AllowFromAll");
            app.UseMvc();
        }
    }
}

通过fiddler调用它来验证响应时，我得到http 401：UnAuthorized错误。



我不确定如果我错过了一些启用CORS的实现。



有什么建议吗？



我尝试过：

When verified for the response by calling it through fiddler, I get http 401: UnAuthorized error.

I'm not sure If I missed some implementation to enable CORS.

Any suggestions please?

What I have tried:

// This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddCors(options =>
            {
                options.AddPolicy("AllowFromAll",
                    builder => builder
                    .WithMethods("GET", "POST")
                    .AllowAnyOrigin()
                    .AllowAnyHeader());
            }); ;

        
            services.AddMvc();
           
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            app.UseCors("AllowFromAll");
            app.UseMvc();
        }
    }
}

推荐答案

朋友请参考此网址，我相信你可以如果没有找到你的答案然后只是让我知道我会解决它：在ASP.NET Web API 2中启用跨源请求Microsoft Docs [ ^ ]



步骤1-

Hi friend refer this url and i am sure you can find your answer if not then just do let me know i will fix it : Enabling Cross-Origin Requests in ASP.NET Web API 2 | Microsoft Docs[^]

Step 1-

using System.Web.Http;
namespace WebService
{
    public static class WebApiConfig
    {
        public static void Register(HttpConfiguration config)
        {
            // New code
            config.EnableCors();

            config.Routes.MapHttpRoute(
                name: "DefaultApi",
                routeTemplate: "api/{controller}/{id}",
                defaults: new { id = RouteParameter.Optional }
            );
        }
    }
}

步骤2 -

Step 2-

using System.Net.Http;
using System.Web.Http;
using System.Web.Http.Cors;

namespace WebService.Controllers
{
    [EnableCors(origins: "yourclientApplicationRootURL", headers: "*", methods: "*")]
    public class TestController : ApiController
    {
        // Controller methods not shown...
    }
}

这篇关于为ASP.NET core 2.0 web api启用CORS的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！