Program.cs

#region Copyright

// Copyright © 2024, TeamDev. All rights reserved.
// 
// Redistribution and use in source and/or binary forms, with or without
// modification, must retain the above copyright notice and the following
// disclaimer.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#endregion

using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;
using DotNetBrowser.Browser;
using DotNetBrowser.Engine;
using DotNetBrowser.Handlers;
using DotNetBrowser.Navigation;
using DotNetBrowser.Net;
using DotNetBrowser.Net.Handlers;

namespace CustomRequestHandling
{
    /// <summary>
    ///     This example demonstrates how to intercept and handle URL requests with a custom URI scheme.
    /// </summary>
    internal class Program
    {
        public static void Main()
        {
            // #docfragment "CustomRequestHandling"
            Handler<InterceptRequestParameters, InterceptRequestResponse> handler =
                new Handler<InterceptRequestParameters, InterceptRequestResponse>(p =>
                {
                    UrlRequestJobOptions options = new UrlRequestJobOptions
                    {
                        Headers = new List<HttpHeader>
                        {
                            new HttpHeader("Content-Type", "text/html", "charset=utf-8")
                        }
                    };

                    UrlRequestJob job = p.Network.CreateUrlRequestJob(p.UrlRequest, options);

                    Task.Run(() =>
                    {
                        // The request processing is performed in a worker thread
                        // in order to avoid freezing the web page.
                        job.Write(Encoding.UTF8.GetBytes("Hello world!"));
                        job.Complete();
                    });

                    return InterceptRequestResponse.Intercept(job);
                });

            EngineOptions engineOptions = new EngineOptions.Builder
            {
                Schemes = 
                {
                    { Scheme.Create("myscheme"), handler }
                }
            }.Build();

            using (IEngine engine = EngineFactory.Create(engineOptions))
            {
                using (IBrowser browser = engine.CreateBrowser())
                {
                    NavigationResult result =
                        browser.Navigation.LoadUrl("myscheme://test1").Result;

                    // If the scheme handler was not set, the LoadResult would be 
                    // LoadResult.Stopped.
                    // However, with the scheme handler, the web page is loaded and
                    // the result is LoadResult.Completed.
                    Console.WriteLine($"Load result: {result.LoadResult}");
                    Console.WriteLine($"HTML: {browser.MainFrame.Html}");
                }
            }
            // #enddocfragment "CustomRequestHandling"

            Console.WriteLine("Press any key to terminate...");
            Console.ReadKey();
        }
    }
}