OpenTween/Thumbnail/Services/Tumblr.cs

   1 // OpenTween - Client of Twitter
   2 // Copyright (c) 2007-2011 kiri_feather (@kiri_feather) <kiri.feather@gmail.com>
   3 //           (c) 2008-2011 Moz (@syo68k)
   4 //           (c) 2008-2011 takeshik (@takeshik) <http://www.takeshik.org/>
   5 //           (c) 2010-2011 anis774 (@anis774) <http://d.hatena.ne.jp/anis774/>
   6 //           (c) 2010-2011 fantasticswallow (@f_swallow) <http://twitter.com/f_swallow>
   7 //           (c) 2012      kim_upsilon (@kim_upsilon) <https://upsilo.net/~upsilon/>
   8 // All rights reserved.
   9 //
  10 // This file is part of OpenTween.
  11 //
  12 // This program is free software; you can redistribute it and/or modify it
  13 // under the terms of the GNU General Public License as published by the Free
  14 // Software Foundation; either version 3 of the License, or (at your option)
  15 // any later version.
  16 //
  17 // This program is distributed in the hope that it will be useful, but
  18 // WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  19 // or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  20 // for more details.
  21 //
  22 // You should have received a copy of the GNU General Public License along
  23 // with this program. If not, see <http://www.gnu.org/licenses/>, or write to
  24 // the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
  25 // Boston, MA 02110-1301, USA.
  26
  27 using System;
  28 using System.Collections.Generic;
  29 using System.Linq;
  30 using System.Text;
  31 using System.Text.RegularExpressions;
  32 using System.Threading;
  33 using System.Threading.Tasks;
  34 using System.Xml;
  35
  36 namespace OpenTween.Thumbnail.Services
  37 {
  38     class Tumblr : IThumbnailService
  39     {
  40         protected readonly Regex regex;
  41
  42         public Tumblr(string urlPattern)
  43         {
  44             this.regex = new Regex(urlPattern);
  45         }
  46
  47         public override Task<ThumbnailInfo> GetThumbnailInfoAsync(string url, PostClass post, CancellationToken token)
  48         {
  49             return Task.Run(() =>
  50             {
  51                 var match = this.regex.Match(url);
  52                 if (!match.Success)
  53                     return null;
  54
  55                 var apiUrl = match.Result("${base}api/read?id=${postID}");
  56
  57                 var http = new HttpVarious();
  58                 var src = "";
  59                 string imgurl = null;
  60                 string errmsg;
  61                 if (http.GetData(apiUrl, null, out src, 0, out errmsg, ""))
  62                 {
  63                     var xdoc = new XmlDocument();
  64                     try
  65                     {
  66                         xdoc.LoadXml(src);
  67
  68                         var type = xdoc.SelectSingleNode("/tumblr/posts/post").Attributes["type"].Value;
  69                         if (type == "photo")
  70                         {
  71                             imgurl = xdoc.SelectSingleNode("/tumblr/posts/post/photo-url").InnerText;
  72                         }
  73                         else
  74                         {
  75                             errmsg = "PostType:" + type;
  76                             return null;
  77                         }
  78                     }
  79                     catch (Exception)
  80                     {
  81                         return null;
  82                     }
  83
  84                     return new ThumbnailInfo
  85                     {
  86                         ImageUrl = url,
  87                         ThumbnailUrl = imgurl,
  88                         TooltipText = null,
  89                     };
  90                 }
  91                 return null;
  92             }, token);
  93         }
  94     }
  95 }