Startup.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Directline.Models;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using Microsoft.IdentityModel.Tokens;
using Swashbuckle.AspNetCore.Swagger;

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

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
            services.AddSingleton<IDataStorage, DataStorage>();
            services.AddSingleton<IConfiguration>(Configuration);
            services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
                .AddJwtBearer(options =>
                {
                    options.TokenValidationParameters = new TokenValidationParameters
                    {
                        ValidateIssuer = true,
                        ValidateAudience = true,
                        ValidateLifetime = true,
                        ValidateIssuerSigningKey = true,
                        ValidIssuer = Configuration["Jwt:Issuer"],
                        ValidAudience = Configuration["Jwt:Issuer"],
                        IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(Configuration["Jwt:Key"]))
                    };
                });

            services
                .AddMvc()
                .AddJsonOptions(options=>{
                    options.SerializerSettings.NullValueHandling = Newtonsoft.Json.NullValueHandling.Ignore;
                })
                .SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
            services.AddSwaggerGen(c =>
            {
                c.SwaggerDoc("v1_v3", new Info { Title = "DirectlineAPI", Version = "v1/v3",Description="DirectLine Custom Implementation" });
            });
        }

        // 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();
            }
            else
            {
                app.UseHsts();
            }
            app.UseCors(builder => {
                builder.AllowAnyOrigin();
                builder.AllowAnyMethod();
                builder.WithHeaders("Origin", "X-Requested-With", "Content-Type", "Accept", "Authorization", "x-ms-bot-agent","dnt");
            });
            app.UseHttpsRedirection();
            app.UseSwagger();
            app.UseSwaggerUI(c =>
            {
                c.SwaggerEndpoint("/swagger/v1_v3/swagger.json", "DirectlineAPI");
            });
            app.UseAuthentication();
            app.UseStaticFiles();
            app.UseMvc(routes=> {
                routes.MapRoute("Ignore", "{*favicon}", new { }, new { favicon = @"(.*[/\\])?favicon\.((ico)|(png))(/.*)?" });
                routes.MapRoute("default","{controller=Home}/{action=Index}/{id?}");
            });
        }
    }
}