OpenTween/Connection/Networking.cs

   1 // OpenTween - Client of Twitter
   2 // Copyright (c) 2014 kim_upsilon (@kim_upsilon) <https://upsilo.net/~upsilon/>
   3 // All rights reserved.
   4 //
   5 // This file is part of OpenTween.
   6 //
   7 // This program is free software; you can redistribute it and/or modify it
   8 // under the terms of the GNU General Public License as published by the Free
   9 // Software Foundation; either version 3 of the License, or (at your option)
  10 // any later version.
  11 //
  12 // This program is distributed in the hope that it will be useful, but
  13 // WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14 // or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  15 // for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License along
  18 // with this program. If not, see <http://www.gnu.org/licenses/>, or write to
  19 // the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
  20 // Boston, MA 02110-1301, USA.
  21
  22 using System;
  23 using System.Collections.Generic;
  24 using System.Linq;
  25 using System.Net;
  26 using System.Net.Http;
  27 using System.Text;
  28 using System.Threading;
  29 using System.Threading.Tasks;
  30
  31 namespace OpenTween.Connection
  32 {
  33     public static class Networking
  34     {
  35         public static TimeSpan DefaultTimeout { get; set; }
  36
  37         /// <summary>
  38         /// 通信に使用するプロキシの種類
  39         /// </summary>
  40         public static ProxyType ProxyType
  41         {
  42             get { return proxyType; }
  43         }
  44
  45         /// <summary>
  46         /// 通信に使用するプロキシ
  47         /// </summary>
  48         public static IWebProxy Proxy
  49         {
  50             get { return proxy; }
  51         }
  52
  53         /// <summary>
  54         /// OpenTween 内で共通して使用する HttpClient インスタンス
  55         /// </summary>
  56         public static HttpClient Http
  57         {
  58             get { return globalHttpClient; }
  59         }
  60
  61         /// <summary>
  62         /// Webプロキシの設定が変更された場合に発生します
  63         /// </summary>
  64         public static event EventHandler WebProxyChanged;
  65
  66         private static bool initialized = false;
  67         private static HttpClient globalHttpClient;
  68         private static ProxyType proxyType = ProxyType.IE;
  69         private static IWebProxy proxy = null;
  70
  71         static Networking()
  72         {
  73             DefaultTimeout = TimeSpan.FromSeconds(20);
  74             globalHttpClient = CreateHttpClient(new HttpClientHandler());
  75         }
  76
  77         /// <summary>
  78         /// ネットワーク接続前に行う処理。起動時に一回だけ実行する必要があります。
  79         /// </summary>
  80         public static void Initialize()
  81         {
  82             Networking.initialized = true;
  83
  84             ServicePointManager.Expect100Continue = false;
  85         }
  86
  87         public static void SetWebProxy(ProxyType proxyType, string proxyAddress, int proxyPort,
  88             string proxyUser, string proxyPassword)
  89         {
  90             IWebProxy proxy;
  91             switch (proxyType)
  92             {
  93                 case ProxyType.None:
  94                     proxy = null;
  95                     break;
  96                 case ProxyType.Specified:
  97                     proxy = new WebProxy(proxyAddress, proxyPort);
  98                     if (!string.IsNullOrEmpty(proxyUser) || !string.IsNullOrEmpty(proxyPassword))
  99                         proxy.Credentials = new NetworkCredential(proxyUser, proxyPassword);
 100                     break;
 101                 case ProxyType.IE:
 102                 default:
 103                     proxy = WebRequest.GetSystemWebProxy();
 104                     break;
 105             }
 106
 107             Networking.proxyType = proxyType;
 108             Networking.proxy = proxy;
 109
 110             Win32Api.SetProxy(proxyType, proxyAddress, proxyPort, proxyUser, proxyPassword);
 111
 112             OnWebProxyChanged(EventArgs.Empty);
 113         }
 114
 115         /// <summary>
 116         /// プロキシ等の設定を施した HttpClient インスタンスを生成します
 117         /// </summary>
 118         /// <remarks>
 119         /// 通常は Networking.Http を使用すべきです。
 120         /// このメソッドを使用する場合は、WebProxyChanged イベントが発生する度に HttpClient を生成し直すように実装してください。
 121         /// </remarks>
 122         public static HttpClient CreateHttpClient(HttpClientHandler handler)
 123         {
 124             if (Networking.Proxy != null)
 125             {
 126                 handler.UseProxy = true;
 127                 handler.Proxy = Networking.Proxy;
 128             }
 129             else
 130             {
 131                 handler.UseProxy = false;
 132             }
 133
 134             var client = new HttpClient(handler);
 135             client.Timeout = Networking.DefaultTimeout;
 136             client.DefaultRequestHeaders.Add("User-Agent", Networking.GetUserAgentString());
 137
 138             return client;
 139         }
 140
 141         public static string GetUserAgentString(bool fakeMSIE = false)
 142         {
 143             if (fakeMSIE)
 144                 return MyCommon.GetAssemblyName() + "/" + MyCommon.FileVersion + " (compatible; MSIE 10.0)";
 145             else
 146                 return MyCommon.GetAssemblyName() + "/" + MyCommon.FileVersion;
 147         }
 148
 149         /// <summary>
 150         /// Initialize() メソッドが事前に呼ばれているか確認します
 151         /// </summary>
 152         internal static void CheckInitialized()
 153         {
 154             if (!Networking.initialized)
 155                 throw new InvalidOperationException("Sequence error.(not initialized)");
 156         }
 157
 158         private static void OnWebProxyChanged(EventArgs e)
 159         {
 160             var newClient = Networking.CreateHttpClient(new HttpClientHandler());
 161             var oldClient = Interlocked.Exchange(ref globalHttpClient, newClient);
 162             oldClient.Dispose();
 163
 164             if (WebProxyChanged != null)
 165                 WebProxyChanged(null, e);
 166         }
 167     }
 168
 169     public enum ProxyType
 170     {
 171         None,
 172         IE,
 173         Specified,
 174     }
 175 }