1Using#region Using
 2
 3using System;
 4using System.Net;
 5using System.Xml;
 6using System.IO;
 7using System.Text;
 8using System.Collections.Specialized;
 9using LiveBlog.Core;
10using LiveBlog.Core.Providers;
11
12#endregion
13
14namespace LiveBlog.Core.Ping
15...{
16  /**//// <summary>
17  /// Pings various blog ping services.
18  /// <remarks>
19  /// Whenever a post is created or updated, it is important
20  /// to notify the ping services so that they have the latest
21  /// updated posts from the blog.
22  /// </remarks>
23  /// </summary>
24  public static class PingService
25  ...{
26    /**//// <summary>
27    /// Sends a ping to various ping services asynchronously.
28    /// </summary>
29    public static void Send()
30    ...{
31      StringCollection services = BlogService.LoadPingServices();
32      foreach (string service in services)
33      ...{
34        Execute(service);
35      }
36    }
37
38    /**//// <summary>
39    /// Creates a web request and invokes the response asynchronous.
40    /// </summary>
41    private static void Execute(string url)
42    ...{
43      try
44      ...{
45        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
46        request.Method = "POST";
47        request.ContentType = "text/xml";
48        request.Timeout = 3000;
49        request.Credentials = CredentialCache.DefaultNetworkCredentials;
50
51        AddXmlToRequest(request);
52        request.GetResponse();
53      }
54      catch (Exception)
55      ...{
56        // Log the error.
57      }
58    }
59
60    /**//// <summary>
61    /// Adds the XML to web request. The XML is the standard
62    /// XML used by RPC-XML requests.
63    /// </summary>
64    private static void AddXmlToRequest(HttpWebRequest request)
65    ...{
66      Stream stream = (Stream)request.GetRequestStream();
67      using (XmlTextWriter writer = new XmlTextWriter(stream, Encoding.ASCII))
68      ...{
69        writer.WriteStartDocument();
70        writer.WriteStartElement("methodCall");
71        writer.WriteElementString("methodName", "weblogUpdates.ping");
72        writer.WriteStartElement("params");
73        writer.WriteStartElement("param");
74        writer.WriteElementString("value", BlogSettings.Instance.Name);
75        writer.WriteEndElement();
76        writer.WriteStartElement("param");
77        writer.WriteElementString("value", Utils.AbsoluteWebRoot.ToString());
78        writer.WriteEndElement();
79        writer.WriteEndElement();
80        writer.WriteEndElement();
81      }
82    }
83  }
84}