OpenTween/Thumbnail/Services/TonTwitterCom.cs

   1 // OpenTween - Client of Twitter
   2 // Copyright (c) 2013 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.IO;
  25 using System.Linq;
  26 using System.Net;
  27 using System.Net.Http;
  28 using System.Text;
  29 using System.Threading;
  30 using System.Threading.Tasks;
  31
  32 namespace OpenTween.Thumbnail.Services
  33 {
  34     /// <summary>
  35     /// Twitter の DM に添付された画像をサムネイル表示するためのクラス
  36     /// </summary>
  37     class TonTwitterCom : IThumbnailService
  38     {
  39         /// <summary>
  40         /// OAuth のトークン等を設定させるためのデリゲート
  41         /// </summary>
  42         internal static Action<HttpConnectionOAuth> InitializeOAuthToken;
  43
  44         public override Task<ThumbnailInfo> GetThumbnailInfoAsync(string url, PostClass post, CancellationToken token)
  45         {
  46             return Task.Run<ThumbnailInfo>(() =>
  47             {
  48                 if (InitializeOAuthToken == null)
  49                     return null;
  50
  51                 if (!url.StartsWith(@"https://ton.twitter.com/1.1/ton/data/"))
  52                     return null;
  53
  54                 return new TonTwitterCom.Thumbnail
  55                 {
  56                     ImageUrl = url,
  57                     ThumbnailUrl = url,
  58                     TooltipText = null,
  59                     FullSizeImageUrl = url,
  60                 };
  61             }, token);
  62         }
  63
  64         public class Thumbnail : ThumbnailInfo
  65         {
  66             public override Task<MemoryImage> LoadThumbnailImageAsync(HttpClient http, CancellationToken cancellationToken)
  67             {
  68                 // TODO: HttpClient を使用したコードに置き換えたい
  69                 return Task.Run(() =>
  70                 {
  71                     var oauth = new HttpOAuthApiProxy();
  72                     TonTwitterCom.InitializeOAuthToken(oauth);
  73
  74                     Stream response = null;
  75                     var statusCode = oauth.GetContent("GET", new Uri(this.ThumbnailUrl), null, ref response, MyCommon.GetUserAgentString());
  76
  77                     using (response)
  78                     {
  79                         if (statusCode == HttpStatusCode.OK)
  80                             return MemoryImage.CopyFromStreamAsync(response);
  81                         else
  82                             throw new WebException(statusCode.ToString(), WebExceptionStatus.ProtocolError);
  83                     }
  84                 }, cancellationToken);
  85             }
  86         }
  87     }
  88 }