Startup.cs

using System;
using System.Text;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.IdentityModel.Tokens;
// using ServiceReference;
using webapi.Helpers;
using webapi.Services;

namespace webapi
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }
        // readonly string MyAllowSpecificOrigins = "_myAllowSpecificOrigins";

        // 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(name: this.MyAllowSpecificOrigins,
            //         builder =>
            //         {
            //             builder.WithOrigins("*.dominiowildcard.com")
            //                 .WithMethods("GET", "POST", "HEAD")
            //                 .AllowAnyHeader();


            //         });
            // });
            services.AddCors();
            services.AddControllers();

            // configure strongly typed settings objects
            var appSettingsSection = Configuration.GetSection("AppSettings");
            services.Configure<AppSettings>(appSettingsSection);

            // configure jwt authentication
            var appSettings = appSettingsSection.Get<AppSettings>();
            var key = Encoding.ASCII.GetBytes(appSettings.Secret);
            services.AddAuthentication(x =>
            {
                x.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
                x.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
            })
                .AddJwtBearer(x =>
                {
                    x.RequireHttpsMetadata = false;
                    x.SaveToken = true;
                    x.TokenValidationParameters = new TokenValidationParameters
                    {
                        ValidateIssuerSigningKey = true,
                        IssuerSigningKey = new SymmetricSecurityKey(key),
                        ValidateIssuer = false,
                        ValidateAudience = false
                    };
                });

            // configure DI for application services
            services.AddScoped<IUserService, UserService>();
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            app.UseRouting();
            // if (env.EnvironmentName == "Development")
            // {

            app.UseCors(x => x
               .AllowAnyOrigin()
               .AllowAnyMethod()
               .AllowAnyHeader());
            Console.WriteLine(env.EnvironmentName);
            // }
            // else
            // {
            //     app.UseCors(this.MyAllowSpecificOrigins);

            // }
            // global cors policy
            // app.UseCors(x => x
            //    .AllowAnyOrigin()
            //    .AllowAnyMethod()
            //    .AllowAnyHeader());

            app.UseAuthentication();
            app.UseAuthorization();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
            });
        }
    }
}