.NET Core Web Application - Request Header Propagation

Startup.cs

// Startup for .NET Core application
public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        // Common Propagation Configuration
        services.AddHeaderPropagation(options =>
        {
            // Propagate X-INBOUND-HEADER if it is present
            options.Headers.Add("X-INBOUND-HEADER");

            // Propagate X-HEADER with its value same as value of X-CUSTOM-HEADER 
            options.Headers.Add("user-agent", "X-RENAMED-HEADER");

            // X-CUSTOM-HEADER and its value is can be computed
            options.Headers.Add("X-CUSTOM-HEADER", context =>
            {
                return new StringValues("SomeValue");
            });
        });


        services.AddHttpClient<GitHubApionsumer>(c =>
        {
            c.BaseAddress = new Uri("https://api.github.com/");
            // Github API versioning
            c.DefaultRequestHeaders.Add("Accept", "application/vnd.github.v3+json");
            // Github requires a user-agent
            c.DefaultRequestHeaders.Add("User-Agent", "theCodeBlogger.com Demo");
        }).AddHeaderPropagation();  // Apply Propagation to Typed Client

        services.AddControllersWithViews();
    }

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        else
        {
            app.UseExceptionHandler("/Home/Error");
            app.UseHsts();
        }
        app.UseHttpsRedirection();
        app.UseStaticFiles();

        // Add middleware in request pipeline
        app.UseHeaderPropagation();

        app.UseRouting();

        app.UseAuthorization();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapControllerRoute(
                name: "default",
                pattern: "{controller=Home}/{action=Index}/{id?}");
        });
    }
}