XMPP
The Extensible Messaging and Presence Protocol (XMPP) is an open technology for real-time communication, which powers a wide range of applications including instant messaging, presence, multi-party chat, voice and video calls, collaboration, lightweight middleware, content syndication, and generalized routing of XML data.
How to work with XMPP in .Net?
agsXMPP is a SDK / library for the eXtensibleMessaging and Presence Protocol (XMPP) protocol written in managed C# dedicated to .NET and Mono technologies. The SDK is released as open source.
SDK could be used for XMPP client, server and component development.
SDK Download Path: http://www.ag-software.de/download-directory/
Here is a small sample how easy you can login to a XMPP Server.
a) I tried Connecting to my Gtalk Account through Jabber Server and tried Changing the Status Message Dynamically(Eg:Showing a CountDown for NewYear).
b) Sending auto reply to contacts in Gtalk while away.
3) Showing Current cricket live Score in your status message.
objXmpp = new agsXMPP.XmppClientConnection();
agsXMPP.Jid jid = null;
jid = new agsXMPP.Jid("my gmail id");
objXmpp.Password = "my gmail password";
objXmpp.Username = jid.User;
objXmpp.Server = jid.Server;
objXmpp.AutoResolveConnectServer = true;
objXmpp.Status = "Available J";
try
{
objXmpp.OnMessage += messageReceived;
objXmpp.OnAuthError += loginFailed;
objXmpp.OnLogin += loggedIn;
objXmpp.Open();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
private void loggedIn(object sender)//On Successful Login to your Account
{
MessageBox.Show("Logged In");
MessageBox.Show(objXmpp.Authenticated.ToString());
}
private void loginFailed(object o, agsXMPP.Xml.Dom.Element el)//On Login Failure
{
MessageBox.Show("Loggin Failed");
}
private void messageReceived(object sender, agsXMPP.protocol.client.Messagemsg)//Handling Auto Reply on Message received
{
string[] chatMessage = null;
chatMessage = msg.From.ToString().Split('/');
agsXMPP.Jid jid = null;
jid = new agsXMPP.Jid(chatMessage[0]);
agsXMPP.protocol.client.Message autoReply = null;
autoReply = new agsXMPP.protocol.client.Message(jid, agsXMPP.protocol.client.MessageType.chat, "This is Auto reply");
objXmpp.Send(autoReply);
}
private void StatusTimer_Tick(object sender, EventArgs e)//To Show a Countdown
{
TimeSpan span = TargetDate.Subtract (System .DateTime ..Now );
string status = "Days More for My Bday:DD" + span.Days.ToString() +"hh" + span.Hours.ToString() + "mm:" + span.Minutes.ToString() + "ss:" + span.Seconds ..ToString();
Presence p = new Presence(ShowType.chat, status);
p.Type = PresenceType.available;
objXmpp.Send(p);
}
//To Get Live Cricket Score from a RSS Feed
private void GetLiveCricketScore()
{
try
{
// create here table and columns that will be used
// for storing items from the xml file for later binding into grid
DataTable dtable = new DataTable();
dtable.Columns.Add(new DataColumn("SlNo"));
dtable.Columns.Add(new DataColumn("title"));
dtable.Columns.Add(new DataColumn("link"));
// fetch webrequest. Here, give the path of the location where rss feed is stored.
//WebRequest WebReq = WebRequest.Create("http://static.cricinfo.com/rss/livescores.xml");
WebRequest WebReq =WebRequest.Create(" http://static.cricinfo.com/rss/livescores.xml ");
// get webresponse from the webrequset
WebResponse webRes = WebReq.GetResponse();
// use stream to stremline the input from from webresponse.
Stream rssStream = webRes.GetResponseStream();
// Create new xml document and load a XML Document
// with the strem.
XmlDocument xmlDoc = new XmlDocument();
// loads the url from the stream
xmlDoc.Load(rssStream);
// use XmlNodeList to get the matching xmlnodes from the xmldocument
XmlNodeList xmlNodeList = xmlDoc.SelectNodes("rss/channel/item");
// create array of the object for creating the row
object[] RowValues = {"", "", "" };
// Make a Loop through RSS Feed items
for (int i = 0; i < xmlNodeList.Count; i++)
{
XmlNode xmlNode;
RowValues[0] = i;
xmlNode = xmlNodeList.Item(i).SelectSingleNode("title");
if (xmlNode != null)
{
RowValues[1] = RemoveDigitsAndSpecialCharacters(xmlNode.InnerText);
}
else
{
RowValues[1] = "";
}
xmlNode = xmlNodeList.Item(i).SelectSingleNode("link");
if (xmlNode != null)
{
RowValues[2] = RemoveDigitsAndSpecialCharacters(xmlNode.InnerText);
}
else
{
RowValues[2] = "";
}
// creating datarow and add it to the datatable
DataRow dRow;
dRow = dtable.Rows.Add(RowValues);
dtable.AcceptChanges();
}
cmbCurrentMatches.DataSource = dtable;
cmbCurrentMatches.DisplayMember = "title";
}
catch (WebException)
{
MessageBox.Show("Not Able to Access Cricket Live Feeds");
}
catch (XmlException)
{
MessageBox.Show("The received Feed was not in a proper format");
}
}
