Startup.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Rewrite;
using Zircon.Base.Middlewares;
using Zircon.Request.Middlewares;

namespace PdfExportOpri
{
    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.AddCors((cors) =>
            {
                cors.AddPolicy("AllowAll",
                    builder =>
                    {
                        builder.AllowAnyOrigin()
                            .AllowAnyHeader()
                            .AllowAnyMethod();
                    });
            });
            services.AddControllers();
        }

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

            app.UseStaticFiles();

            app.UseRewriter(new RewriteOptions()
                .Add(context =>
                {
                    if (context.HttpContext.Request.Path.Value.StartsWith("//"))
                    {
                        context.HttpContext.Request.Path = context.HttpContext.Request.Path.Value.Substring(1);
                    }
                })
            );

            app.UseRouting();

            app.UseExceptionMiddleware();

            app.UseRequestLogMiddleware();

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