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 using OpenTween.Connection;
  34
  35 namespace OpenTween.Thumbnail.Services
  36 {
  37     class Tinami : IThumbnailService
  38     {
  39         public static readonly Regex UrlPatternRegex =
  40             new Regex(@"^https?://www\.tinami\.com/view/(?<ContentId>\d+)$");
  41
  42         protected HttpClient http
  43         {
  44             get { return this.localHttpClient ?? Networking.Http; }
  45         }
  46         private readonly HttpClient localHttpClient;
  47
  48         public Tinami()
  49             : this(null)
  50         {
  51         }
  52
  53         public Tinami(HttpClient http)
  54         {
  55             this.localHttpClient = http;
  56         }
  57
  58         public override async Task<ThumbnailInfo> GetThumbnailInfoAsync(string url, PostClass post, CancellationToken token)
  59         {
  60             var match = Tinami.UrlPatternRegex.Match(url);
  61             if (!match.Success)
  62                 return null;
  63
  64             var contentId = match.Groups["ContentId"].Value;
  65
  66             try
  67             {
  68                 var xdoc = await this.FetchContentInfoApiAsync(contentId, token)
  69                     .ConfigureAwait(false);
  70
  71                 if (xdoc.XPathSelectElement("/rsp").Attribute("stat").Value != "ok")
  72                     return null;
  73
  74                 var thumbUrlElm = xdoc.XPathSelectElement("/rsp/content/thumbnails/thumbnail_150x150");
  75                 if (thumbUrlElm == null)
  76                     return null;
  77
  78                 var descElm = xdoc.XPathSelectElement("/rsp/content/description");
  79
  80                 return new ThumbnailInfo
  81                 {
  82                     ImageUrl = url,
  83                     ThumbnailUrl = thumbUrlElm.Attribute("url").Value,
  84                     TooltipText = descElm == null ? null : descElm.Value,
  85                 };
  86             }
  87             catch (HttpRequestException) { }
  88
  89             return null;
  90         }
  91
  92         protected virtual async Task<XDocument> FetchContentInfoApiAsync(string contentId, CancellationToken token)
  93         {
  94             var query = new Dictionary<string, string>
  95             {
  96                 {"api_key", ApplicationSettings.TINAMIApiKey},
  97                 {"cont_id", contentId},
  98             };
  99
 100             var apiUrl = new Uri("http://api.tinami.com/content/info?" + MyCommon.BuildQueryString(query));
 101
 102             using (var response = await this.http.GetAsync(apiUrl, token).ConfigureAwait(false))
 103             {
 104                 response.EnsureSuccessStatusCode();
 105
 106                 var xmlStr = await response.Content.ReadAsStringAsync()
 107                     .ConfigureAwait(false);
 108
 109                 return XDocument.Parse(xmlStr);
 110             }
 111         }
 112     }
 113 }