OpenTween/Connection/Imgur.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.Http;
  27 using System.Net.Http.Headers;
  28 using System.Text;
  29 using System.Threading.Tasks;
  30 using System.Xml.Linq;
  31 using OpenTween.Api.DataModel;
  32
  33 namespace OpenTween.Connection
  34 {
  35     public class Imgur : IMediaUploadService
  36     {
  37         private readonly static long MaxFileSize = 10L * 1024 * 1024;
  38         private readonly static Uri UploadEndpoint = new Uri("https://api.imgur.com/3/image.xml");
  39
  40         private readonly static IEnumerable<string> SupportedExtensions = new[]
  41         {
  42             ".jpg",
  43             ".jpeg",
  44             ".gif",
  45             ".png",
  46             ".tif",
  47             ".tiff",
  48             ".bmp",
  49             ".pdf",
  50             ".xcf",
  51         };
  52
  53         private readonly Twitter twitter;
  54         private TwitterConfiguration twitterConfig;
  55
  56         public Imgur(Twitter tw, TwitterConfiguration twitterConfig)
  57         {
  58             this.twitter = tw;
  59             this.twitterConfig = twitterConfig;
  60         }
  61
  62         public int MaxMediaCount
  63         {
  64             get { return 1; }
  65         }
  66
  67         public string SupportedFormatsStrForDialog
  68         {
  69             get
  70             {
  71                 var formats = new StringBuilder();
  72
  73                 foreach (var extension in SupportedExtensions)
  74                     formats.AppendFormat("*{0};", extension);
  75
  76                 return "Image Files(" + formats + ")|" + formats;
  77             }
  78         }
  79
  80         public bool CheckFileExtension(string fileExtension)
  81         {
  82             return SupportedExtensions.Contains(fileExtension, StringComparer.OrdinalIgnoreCase);
  83         }
  84
  85         public bool CheckFileSize(string fileExtension, long fileSize)
  86         {
  87             var maxFileSize = this.GetMaxFileSize(fileExtension);
  88             return maxFileSize == null || fileSize <= maxFileSize.Value;
  89         }
  90
  91         public long? GetMaxFileSize(string fileExtension)
  92         {
  93             return MaxFileSize;
  94         }
  95
  96         public async Task PostStatusAsync(string text, long? inReplyToStatusId, IMediaItem[] mediaItems)
  97         {
  98             if (mediaItems == null)
  99                 throw new ArgumentNullException(nameof(mediaItems));
 100
 101             if (mediaItems.Length != 1)
 102                 throw new ArgumentOutOfRangeException(nameof(mediaItems));
 103
 104             var item = mediaItems[0];
 105
 106             if (item == null)
 107                 throw new ArgumentException("Err:Media not specified.");
 108
 109             if (!item.Exists)
 110                 throw new ArgumentException("Err:Media not found.");
 111
 112             XDocument xml;
 113             try
 114             {
 115                 xml = await this.UploadFileAsync(item, text)
 116                     .ConfigureAwait(false);
 117             }
 118             catch (HttpRequestException ex)
 119             {
 120                 throw new WebApiException("Err:" + ex.Message, ex);
 121             }
 122             catch (OperationCanceledException ex)
 123             {
 124                 throw new WebApiException("Err:Timeout", ex);
 125             }
 126
 127             var imageElm = xml.Element("data");
 128
 129             if (imageElm.Attribute("success").Value != "1")
 130                 throw new WebApiException("Err:" + imageElm.Attribute("status").Value);
 131
 132             var imageUrl = imageElm.Element("link").Value;
 133
 134             var textWithImageUrl = text + " " + imageUrl.Trim();
 135
 136             await this.twitter.PostStatus(textWithImageUrl, inReplyToStatusId)
 137                 .ConfigureAwait(false);
 138         }
 139
 140         public int GetReservedTextLength(int mediaCount)
 141         {
 142             return this.twitterConfig.ShortUrlLength;
 143         }
 144
 145         public void UpdateTwitterConfiguration(TwitterConfiguration config)
 146         {
 147             this.twitterConfig = config;
 148         }
 149
 150         public async Task<XDocument> UploadFileAsync(IMediaItem item, string title)
 151         {
 152             using (var content = new MultipartFormDataContent())
 153             using (var mediaStream = item.OpenRead())
 154             using (var mediaContent = new StreamContent(mediaStream))
 155             using (var titleContent = new StringContent(title))
 156             {
 157                 content.Add(mediaContent, "image", item.Name);
 158                 content.Add(titleContent, "title");
 159
 160                 using (var request = new HttpRequestMessage(HttpMethod.Post, UploadEndpoint))
 161                 {
 162                     request.Headers.Authorization =
 163                         new AuthenticationHeaderValue("Client-ID", ApplicationSettings.ImgurClientID);
 164                     request.Content = content;
 165
 166                     using (var response = await Networking.Http.SendAsync(request).ConfigureAwait(false))
 167                     {
 168                         response.EnsureSuccessStatusCode();
 169
 170                         using (var stream = await response.Content.ReadAsStreamAsync().ConfigureAwait(false))
 171                         {
 172                             return XDocument.Load(stream);
 173                         }
 174                     }
 175                 }
 176             }
 177         }
 178     }
 179 }