private int InvokeID = 1; // Holds the unique Invoke ID for each XML request
/* Sets the client, writer and reader variables of XMLHandler class with the respective SocketHandler class variables*/
public void setParameters(SocketHandler socket_handle)
{
client = socket_handle.TcpClient;
writer = socket_handle.SocketWriter;
reader = socket_handle.SocketReader;
}
/* This function starts an application session with the AE Services server and returns a
* session ID to uniquely identify the session.
*/
public string StartApplicationSession(string server_ip, int server_port, bool isSecure, string username, string password, string protocol_version)
{
try
{
/*
* Create TCP socket and attach stream Reader and Writer. This reader and writer
* will be used to read response data and write request data respectively
* */
socket_handle = new SocketHandler();
Console.WriteLine("Connecting to AE Services Server..");
if (socket_handle.openSocket(server_ip, server_port, isSecure))
{
Console.WriteLine("Socket open operation performed successfully");
xmlHandler = new XMLHandler();
xmlHandler.setParameters(socket_handle);
}
else
{
Console.WriteLine("Error encountered during socket open operation.\n" +
"Please check IP address and port for the AE Services server");
if (isSecure)
{
Console.WriteLine("Ensure that the secure port is enabled");
}
else
{
Console.WriteLine("Ensure that the non-secure port is enabled");
}
Console.ReadKey();
Environment.Exit(1);
}
// Get the XML string for the "StartApplicationSession" request and send the request
xmlHandler.sendRequest(XMLFormatter.FormatStartAppSessionRequest(username, password, protocol_version));
// Read the response
string response = xmlHandler.readXMLMessage();
// parse the response and create a document node tree structure for accessing XML data
XmlDocument doc = new XmlDocument();
if (response.Contains("StartApplicationSessionPosResponse"))
{
doc.LoadXml(response);
XmlElement root = doc.DocumentElement;
XmlNodeList NodeList = root.GetElementsByTagName("sessionID");
string sessionID = NodeList[0].InnerText;
return(sessionID);
}
else
{
/* Parsing the reason for the reception of "StartApplicationSessionNegResponse" response
*/
doc.LoadXml(response);
XmlElement root = doc.DocumentElement;
XmlNodeList NodeList = root.GetElementsByTagName("errorCode");
if (NodeList.Count > 0)
{
string errorResponse = NodeList[0].InnerText;
Console.WriteLine("Received error response for StartApplicationSession:\n {0}", errorResponse);
return(null);
}
return(null);
}
}
catch (Exception ex)
{
Console.WriteLine("Exception at StartApplicationSession:\n {0}", ex.Message);
return(null);
}
}