WireMock.Net-wiremock/src/WireMock.Net/Http/HttpClientBuilder.cs

using System.Net;
using System.Net.Http;
using WireMock.HttpsCertificate;
using WireMock.Settings;

namespace WireMock.Http
{
    internal static class HttpClientBuilder
    {
        public static HttpClient Build(IProxyAndRecordSettings settings)
        {
#if NETSTANDARD || NETCOREAPP3_1 || NET5_0
            var handler = new HttpClientHandler
            {
                CheckCertificateRevocationList = false,
                SslProtocols = System.Security.Authentication.SslProtocols.Tls12 | System.Security.Authentication.SslProtocols.Tls11 | System.Security.Authentication.SslProtocols.Tls,
                ServerCertificateCustomValidationCallback = (message, cert, chain, errors) => true,
                AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate
            };
#elif NET46
            var handler = new HttpClientHandler
            {
                ServerCertificateCustomValidationCallback = (message, cert, chain, errors) => true,
                AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate
            };
#else
            var handler = new WebRequestHandler
            {
                ServerCertificateValidationCallback = (sender, certificate, chain, errors) => true,
                AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate
            };
#endif

            if (!string.IsNullOrEmpty(settings.ClientX509Certificate2ThumbprintOrSubjectName))
            {
                handler.ClientCertificateOptions = ClientCertificateOption.Manual;

                var x509Certificate2 = CertificateLoader.LoadCertificate(settings.ClientX509Certificate2ThumbprintOrSubjectName);
                handler.ClientCertificates.Add(x509Certificate2);
            }

            handler.AllowAutoRedirect = settings.AllowAutoRedirect == true;

            // If UseCookies enabled, httpClient ignores Cookie header
            handler.UseCookies = false;

            if (settings.WebProxySettings != null)
            {
                handler.UseProxy = true;

                handler.Proxy = new WebProxy(settings.WebProxySettings.Address);
                if (settings.WebProxySettings.UserName != null && settings.WebProxySettings.Password != null)
                {
                    handler.Proxy.Credentials = new NetworkCredential(settings.WebProxySettings.UserName, settings.WebProxySettings.Password);
                }
            }

#if !NETSTANDARD1_3
            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;
            ServicePointManager.ServerCertificateValidationCallback = (message, cert, chain, errors) => true;
#endif

            return new HttpClient(handler);
        }
    }
}