WTM (ASP.NET Core) cross-domain settings

Those who use WTM may all encounter cross-domain problems just like me. Obviously, CorsOptions set EnableAll in appsettings.json to true, but when debugging SPA application, a cross-domain error message is still displayed. The solution is as follows:

One, the ConfigureServices method adds content

 x.AddCors(options =>
                        {
                            options.AddPolicy("all", builder =>
                            {
                                builder.SetIsOriginAllowed(_ => true) //允许任何来源的主机访问
                                .AllowAnyMethod()
                                .AllowAnyHeader()
                                .AllowCredentials();//指定处理cookie
                            });
                        });

Two, add in the Configure method 

x.UseCors("all");

In this way, after restarting the project, WTM cross-domain is realized. 

X. If you need to limit access to the source, modify ConfigureServices 

 services.AddCors(options => options.AddPolicy("CorsPolicy",
            builder =>
            {
                builder.WithOrigins(new string[] { "http://127.0.0.1:5500" })
                    .AllowAnyMethod()
                    .AllowAnyHeader()
                    .AllowCredentials();
            }));