OpenTween/Connection/imgly.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) 2011      spinor (@tplantd) <http://d.hatena.ne.jp/spinor/>
   8 //           (c) 2014      kim_upsilon (@kim_upsilon) <https://upsilo.net/~upsilon/>
   9 // All rights reserved.
  10 //
  11 // This file is part of OpenTween.
  12 //
  13 // This program is free software; you can redistribute it and/or modify it
  14 // under the terms of the GNU General Public License as published by the Free
  15 // Software Foundation; either version 3 of the License, or (at your option)
  16 // any later version.
  17 //
  18 // This program is distributed in the hope that it will be useful, but
  19 // WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  20 // or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  21 // for more details.
  22 //
  23 // You should have received a copy of the GNU General Public License along
  24 // with this program. If not, see <http://www.gnu.org/licenses/>, or write to
  25 // the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
  26 // Boston, MA 02110-1301, USA.
  27
  28 using System;
  29 using System.Collections.Generic;
  30 using System.IO;
  31 using System.Linq;
  32 using System.Net;
  33 using System.Net.Http;
  34 using System.Threading.Tasks;
  35 using System.Xml;
  36 using System.Xml.Linq;
  37 using System.Xml.XPath;
  38 using OpenTween.Api;
  39 using OpenTween.Api.DataModel;
  40
  41 namespace OpenTween.Connection
  42 {
  43     public class imgly : IMediaUploadService
  44     {
  45         private readonly string[] pictureExt = { ".jpg", ".jpeg", ".gif", ".png" };
  46         private readonly long MaxFileSize = 4L * 1024 * 1024;
  47
  48         private readonly Twitter tw;
  49         private readonly ImglyApi imglyApi;
  50
  51         private TwitterConfiguration twitterConfig;
  52
  53         public imgly(Twitter twitter, TwitterConfiguration twitterConfig)
  54         {
  55             this.tw = twitter;
  56             this.twitterConfig = twitterConfig;
  57
  58             this.imglyApi = new ImglyApi(twitter.Api);
  59         }
  60
  61         public int MaxMediaCount
  62         {
  63             get { return 1; }
  64         }
  65
  66         public string SupportedFormatsStrForDialog
  67         {
  68             get
  69             {
  70                 return "Image Files(*.gif;*.jpg;*.jpeg;*.png)|*.gif;*.jpg;*.jpeg;*.png";
  71             }
  72         }
  73
  74         public bool CanUseAltText => false;
  75
  76         public bool CheckFileExtension(string fileExtension)
  77         {
  78             return this.pictureExt.Contains(fileExtension.ToLowerInvariant());
  79         }
  80
  81         public bool CheckFileSize(string fileExtension, long fileSize)
  82         {
  83             var maxFileSize = this.GetMaxFileSize(fileExtension);
  84             return maxFileSize == null || fileSize <= maxFileSize.Value;
  85         }
  86
  87         public long? GetMaxFileSize(string fileExtension)
  88         {
  89             return MaxFileSize;
  90         }
  91
  92         public async Task PostStatusAsync(string text, long? inReplyToStatusId, IMediaItem[] mediaItems)
  93         {
  94             if (mediaItems == null)
  95                 throw new ArgumentNullException(nameof(mediaItems));
  96
  97             if (mediaItems.Length != 1)
  98                 throw new ArgumentOutOfRangeException(nameof(mediaItems));
  99
 100             var item = mediaItems[0];
 101
 102             if (item == null)
 103                 throw new ArgumentException("Err:Media not specified.");
 104
 105             if (!item.Exists)
 106                 throw new ArgumentException("Err:Media not found.");
 107
 108             var xml = await this.imglyApi.UploadFileAsync(item, text)
 109                 .ConfigureAwait(false);
 110
 111             var imageUrlElm = xml.XPathSelectElement("/image/url");
 112             if (imageUrlElm == null)
 113                 throw new WebApiException("Invalid API response", xml.ToString());
 114
 115             var textWithImageUrl = text + " " + imageUrlElm.Value.Trim();
 116
 117             await this.tw.PostStatus(textWithImageUrl, inReplyToStatusId)
 118                 .ConfigureAwait(false);
 119         }
 120
 121         public int GetReservedTextLength(int mediaCount)
 122         {
 123             return this.twitterConfig.ShortUrlLength;
 124         }
 125
 126         public void UpdateTwitterConfiguration(TwitterConfiguration config)
 127         {
 128             this.twitterConfig = config;
 129         }
 130
 131         public class ImglyApi
 132         {
 133             private readonly HttpClient http;
 134
 135             private static readonly Uri UploadEndpoint = new Uri("http://img.ly/api/2/upload.xml");
 136
 137             private static readonly Uri OAuthRealm = new Uri("http://api.twitter.com/");
 138             private static readonly Uri AuthServiceProvider = new Uri("https://api.twitter.com/1.1/account/verify_credentials.json");
 139
 140             public ImglyApi(TwitterApi twitterApi)
 141             {
 142                 var handler = twitterApi.CreateOAuthEchoHandler(AuthServiceProvider, OAuthRealm);
 143
 144                 this.http = Networking.CreateHttpClient(handler);
 145                 this.http.Timeout = TimeSpan.FromMinutes(1);
 146             }
 147
 148             /// <summary>
 149             /// 画像のアップロードを行います
 150             /// </summary>
 151             /// <exception cref="WebApiException"/>
 152             /// <exception cref="XmlException"/>
 153             public async Task<XDocument> UploadFileAsync(IMediaItem item, string message)
 154             {
 155                 // 参照: http://img.ly/api
 156
 157                 using (var request = new HttpRequestMessage(HttpMethod.Post, UploadEndpoint))
 158                 using (var multipart = new MultipartFormDataContent())
 159                 {
 160                     request.Content = multipart;
 161
 162                     using (var messageContent = new StringContent(message))
 163                     using (var mediaStream = item.OpenRead())
 164                     using (var mediaContent = new StreamContent(mediaStream))
 165                     {
 166                         multipart.Add(messageContent, "message");
 167                         multipart.Add(mediaContent, "media", item.Name);
 168
 169                         using (var response = await this.http.SendAsync(request).ConfigureAwait(false))
 170                         {
 171                             var responseText = await response.Content.ReadAsStringAsync()
 172                                 .ConfigureAwait(false);
 173
 174                             if (!response.IsSuccessStatusCode)
 175                                 throw new WebApiException(response.StatusCode.ToString(), responseText);
 176
 177                             return XDocument.Parse(responseText);
 178                         }
 179                     }
 180                 }
 181             }
 182         }
 183     }
 184 }