1Using#region Using
  2
  3using System;
  4using System.IO;
  5using System.Xml;
  6using System.Net;
  7using System.Globalization;
  8using System.Text.RegularExpressions;
  9using System.Collections.Generic;
 10
 11#endregion
 12
 13namespace LiveBlog.Core.Ping
 14...{
 15  /**//// <summary>
 16  /// 
 17  /// </summary>
 18  public static class Trackback
 19  ...{
 20
 21    /**//// <summary>
 22    /// 
 23    /// </summary>
 24    /// <param name="message"></param>
 25    /// <returns></returns>    
 26    public static bool Send(TrackbackMessage message)
 27    ...{
 28            if (!BlogSettings.Instance.EnableTrackBackSend)
 29                return false;
 30
 31      if (message == null)
 32        throw new ArgumentNullException("message");
 33
 34      OnSending(message.UrlToNotifyTrackback);
 35      //Warning:next line if for local debugging porpuse please donot remove it until you need to
 36      //tMessage.PostURL = new Uri("http://www.artinsoft.com/webmaster/trackback.html");
 37      HttpWebRequest request = (HttpWebRequest)System.Net.HttpWebRequest.Create(message.UrlToNotifyTrackback); //HttpHelper.CreateRequest(trackBackItem);
 38      request.Credentials = CredentialCache.DefaultNetworkCredentials;
 39      request.Method = "POST";
 40      request.ContentLength = message.ToString().Length;
 41      request.ContentType = "application/x-www-form-urlencoded";
 42      request.KeepAlive = false;
 43      request.Timeout = 10000;
 44
 45      using (StreamWriter myWriter = new StreamWriter(request.GetRequestStream()))
 46      ...{
 47        myWriter.Write(message.ToString());
 48      }
 49
 50      bool result = false;
 51      HttpWebResponse response;
 52      try
 53      ...{
 54        response = (HttpWebResponse)request.GetResponse();
 55        OnSent(message.UrlToNotifyTrackback);
 56        string answer;
 57        using (System.IO.StreamReader sr = new System.IO.StreamReader(response.GetResponseStream()))
 58        ...{
 59          answer = sr.ReadToEnd();
 60        }
 61
 62        if (response.StatusCode == HttpStatusCode.OK)
 63        ...{
 64          //todo:This could be a strict XML parsing if necesary/maybe logging activity here too
 65          if (answer.Contains("<error>0</error>"))
 66          ...{
 67            result = true;
 68          }
 69          else
 70          ...{
 71            result = false;
 72          }
 73        }
 74        else
 75        ...{
 76          result = false;
 77        }
 78      }
 79      catch //(WebException wex)
 80      ...{
 81        result = false;
 82      }
 83      return result;
 84    }
 85
 86    ...#region
 87
 88    /**//// <summary>
 89    /// Occurs just before a trackback is sent.
 90    /// </summary>
 91    public static event EventHandler<EventArgs> Sending;
 92    private static void OnSending(Uri url)
 93    ...{
 94      if (Sending != null)
 95      ...{
 96        Sending(url, new EventArgs());
 97      }
 98    }
 99
100    /**//// <summary>
101    /// Occurs when a trackback has been sent
102    /// </summary>
103    public static event EventHandler<EventArgs> Sent;
104    private static void OnSent(Uri url)
105    ...{
106      if (Sent != null)
107      ...{
108        Sent(url, new EventArgs());
109      }
110    }
111
112    #endregion
113
114  }
115
116  /**//// <summary>
117  /// 
118  /// </summary>
119  public class TrackbackMessage
120  ...{
121    /**//// <summary>
122    /// 
123    /// </summary>
124    private string _Title;
125
126    /**//// <summary>
127    /// 
128    /// </summary>
129    public string Title
130    ...{
131      get ...{ return _Title; }
132      set ...{ _Title = value; }
133    }
134    
135    /**//// <summary>
136    /// 
137    /// </summary>
138    private Uri _PostUrl;
139
140    /**//// <summary>
141    /// 
142    /// </summary>
143    public Uri PostUrl
144    ...{
145      get ...{ return _PostUrl; }
146      set ...{ _PostUrl = value; }
147    }
148
149    /**//// <summary>
150    /// 
151    /// </summary>
152    private string _Excerpt;
153
154    /**//// <summary>
155    /// 
156    /// </summary>
157    public string Excerpt
158    ...{
159      get ...{ return _Excerpt; }
160      set ...{ _Excerpt = value; }
161    }
162
163    /**//// <summary>
164    /// 
165    /// </summary>
166    private string _BlogName;
167
168    /**//// <summary>
169    /// 
170    /// </summary>
171    public string BlogName
172    ...{
173      get ...{ return _BlogName; }
174      set ...{ _BlogName = value; }
175    }
176
177    /**//// <summary>
178    /// 
179    /// </summary>
180    private Uri _UrlToNotifyTrackback;
181
182    /**//// <summary>
183    /// 
184    /// </summary>
185    public Uri UrlToNotifyTrackback
186    ...{
187      get ...{ return _UrlToNotifyTrackback; }
188      set ...{ _UrlToNotifyTrackback = value; }
189    }
190
191    /**//// <summary>
192    /// 
193    /// </summary>
194    /// <param name="post"></param>
195    /// <param name="urlToNotifyTrackback"></param>
196    public TrackbackMessage(IPublishable item, Uri urlToNotifyTrackback)
197    ...{
198      if (item == null)
199        throw new ArgumentNullException("post");
200
201      Title = item.Title;
202      PostUrl = item.AbsoluteLink;
203      Excerpt = item.Title;
204      BlogName = BlogSettings.Instance.Name;
205      UrlToNotifyTrackback = urlToNotifyTrackback;
206    }
207
208    /**//// <summary>
209    /// 
210    /// </summary>
211    /// <returns></returns>
212    public override string ToString()
213    ...{
214      if (string.IsNullOrEmpty(UrlToNotifyTrackback.Query))
215      ...{
216        return String.Format(CultureInfo.InvariantCulture, "?title={0}&url={1}&excerpt={2}&blog_name={3}", Title, PostUrl, Excerpt, BlogName);
217      }
218      else
219      ...{
220        return String.Format(CultureInfo.InvariantCulture, "&title={0}&url={1}&excerpt={2}&blog_name={3}", Title, PostUrl, Excerpt, BlogName);
221      }
222    }
223
224  }
225}