OpenTween/Thumbnail/Services/Tinami.cs

   1 // OpenTween - Client of Twitter
   2 // Copyright (c) 2012 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.Http;
  26 using System.Text;
  27 using System.Text.RegularExpressions;
  28 using System.Threading;
  29 using System.Threading.Tasks;
  30 using System.Web;
  31 using System.Xml.Linq;
  32 using System.Xml.XPath;
  33
  34 namespace OpenTween.Thumbnail.Services
  35 {
  36     class Tinami : IThumbnailService
  37     {
  38         public static readonly Regex UrlPatternRegex =
  39             new Regex(@"^http://www\.tinami\.com/view/(?<ContentId>\d+)$");
  40
  41         protected readonly HttpClient http;
  42
  43         public Tinami(HttpClient http)
  44         {
  45             this.http = http;
  46         }
  47
  48         public override async Task<ThumbnailInfo> GetThumbnailInfoAsync(string url, PostClass post, CancellationToken token)
  49         {
  50             var match = Tinami.UrlPatternRegex.Match(url);
  51             if (!match.Success)
  52                 return null;
  53
  54             var contentId = match.Groups["ContentId"].Value;
  55
  56             try
  57             {
  58                 var xdoc = await this.FetchContentInfoApiAsync(contentId, token)
  59                     .ConfigureAwait(false);
  60
  61                 if (xdoc.XPathSelectElement("/rsp").Attribute("stat").Value != "ok")
  62                     return null;
  63
  64                 var thumbUrlElm = xdoc.XPathSelectElement("/rsp/content/thumbnails/thumbnail_150x150");
  65                 if (thumbUrlElm == null)
  66                     return null;
  67
  68                 var descElm = xdoc.XPathSelectElement("/rsp/content/description");
  69
  70                 return new ThumbnailInfo
  71                 {
  72                     ImageUrl = url,
  73                     ThumbnailUrl = thumbUrlElm.Attribute("url").Value,
  74                     TooltipText = descElm == null ? null : descElm.Value,
  75                 };
  76             }
  77             catch (HttpRequestException) { }
  78
  79             return null;
  80         }
  81
  82         protected virtual async Task<XDocument> FetchContentInfoApiAsync(string contentId, CancellationToken token)
  83         {
  84             var query = new Dictionary<string, string>
  85             {
  86                 {"api_key", ApplicationSettings.TINAMIApiKey},
  87                 {"cont_id", contentId},
  88             };
  89
  90             var apiUrl = new Uri("http://api.tinami.com/content/info?" + MyCommon.BuildQueryString(query));
  91
  92             using (var response = await this.http.GetAsync(apiUrl, token).ConfigureAwait(false))
  93             {
  94                 response.EnsureSuccessStatusCode();
  95
  96                 var xmlStr = await response.Content.ReadAsStringAsync()
  97                     .ConfigureAwait(false);
  98
  99                 return XDocument.Parse(xmlStr);
 100             }
 101         }
 102     }
 103 }