HttpClientFactory.cs

using System;
using System.IO;
using System.IO.Compression;
using System.Linq;
using System.Collections.Generic;
using System.Diagnostics;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using NetCoreForce.Client.Serializer;
using NetCoreForce.Client.Models;

namespace NetCoreForce.Client
{
    public class HttpClientFactory
    {
        private const string GZipEncoding = "gzip";
        private const string DeflateEncoding = "deflate";

        public static HttpClient CreateHttpClient(bool useCompression = true, string proxyUrl = null)
        {
            var handler = new HttpClientHandler();
            if (useCompression && handler.SupportsAutomaticDecompression)
            {
                handler.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
            }

            if(!string.IsNullOrEmpty(proxyUrl))
            {
                handler.Proxy = new CustomProxy(proxyUrl);
            }

            HttpClient httpClient = new HttpClient(handler);

            if (useCompression && handler.SupportsAutomaticDecompression)
            {
                httpClient.DefaultRequestHeaders.AcceptEncoding.Add(new StringWithQualityHeaderValue(GZipEncoding));
                httpClient.DefaultRequestHeaders.AcceptEncoding.Add(new StringWithQualityHeaderValue(DeflateEncoding));
            }

            return httpClient;
        }
    }
}