OpenTween/Thumbnail/Services/Vimeo.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;
  26 using System.Net.Http;
  27 using System.Runtime.Serialization.Json;
  28 using System.Text;
  29 using System.Text.RegularExpressions;
  30 using System.Threading;
  31 using System.Threading.Tasks;
  32 using System.Xml;
  33 using System.Xml.Linq;
  34 using System.Xml.XPath;
  35
  36 namespace OpenTween.Thumbnail.Services
  37 {
  38     class Vimeo : IThumbnailService
  39     {
  40         protected readonly HttpClient http;
  41         protected readonly Regex regex;
  42
  43         public Vimeo(HttpClient http, string urlPattern)
  44         {
  45             this.http = http;
  46             this.regex = new Regex(urlPattern);
  47         }
  48
  49         public override async Task<ThumbnailInfo> GetThumbnailInfoAsync(string url, PostClass post, CancellationToken token)
  50         {
  51             var match = this.regex.Match(url);
  52             if (!match.Success)
  53                 return null;
  54
  55             var apiUrl = "http://vimeo.com/api/oembed.xml?url=" + Uri.EscapeDataString(url);
  56
  57             var xmlStr = await this.http.GetStringAsync(apiUrl)
  58                 .ConfigureAwait(false);
  59
  60             var xdoc = XDocument.Parse(xmlStr);
  61
  62             var thumbUrlElm = xdoc.XPathSelectElement("/oembed/thumbnail_url");
  63             if (thumbUrlElm != null)
  64             {
  65                 var titleElm = xdoc.XPathSelectElement("/oembed/title");
  66                 var durationElm = xdoc.XPathSelectElement("/oembed/duration");
  67
  68                 var tooltipText = "";
  69                 if (titleElm != null && durationElm != null)
  70                 {
  71                     var duration = int.Parse(durationElm.Value);
  72                     var minute = duration / 60;
  73                     var second = duration % 60;
  74                     tooltipText = string.Format("{0} ({1:00}:{2:00})", titleElm.Value, minute, second);
  75                 }
  76
  77                 return new ThumbnailInfo
  78                 {
  79                     ImageUrl = url,
  80                     ThumbnailUrl = thumbUrlElm.Value,
  81                     TooltipText = tooltipText,
  82                 };
  83             }
  84
  85             return null;
  86         }
  87     }
  88 }