public void ProcessRequest(HttpContext context)
{
// retrieve params
var clientId = context.Request.QueryString["clientId"];
var handler = new RemoteSessionEventSourceHandler(context, clientId);
try
{
handler.Open();
// keep the http context open as long as the http client is connected
while (context.Response.IsClientConnected)
{
Thread.Sleep(1000);
}
}
catch (Exception exc)
{
// rethrown
}
finally
{
handler.Close();
}
}
public RemoteSessionEventSourceHandler(HttpContext context)
{
_context = context;
Session = context.Session;
try
{
if (_context.Session[HttpSessionStateVariables.RemoteSession.ToString()] == null)
{
throw new NullReferenceException();
}
// retrieve the remote session for the given http session
_remoteSession = (RemoteSession)_context.Session[HttpSessionStateVariables.RemoteSession.ToString()];
// register the handler against the remote session manager
lock (((ICollection)_remoteSession.Manager.EventSources).SyncRoot)
{
// search for a previously registered handler
RemoteSessionEventSourceHandler oldEventSource = null;
foreach (var eventSource in _remoteSession.Manager.EventSources)
{
if (eventSource.Session.SessionID == _context.Session.SessionID)
{
oldEventSource = eventSource;
break;
}
}
// unregister the previous handler, if any
if (oldEventSource != null)
{
_remoteSession.Manager.EventSources.Remove(oldEventSource);
}
// register this handler
_remoteSession.Manager.EventSources.Add(this);
}
// mime type for event source
_context.Response.ContentType = "text/event-stream";
_context.Response.Headers.Add("Content-Type", "text/event-stream\n\n");
}
catch (Exception exc)
{
Trace.TraceError("Failed to retrieve the remote session for the http session {0}, ({1})", _context.Session.SessionID, exc);
}
}
public void ProcessRequest(HttpContext context)
{
var handler = new RemoteSessionEventSourceHandler(context);
try
{
// keep the http context open as long as the http client is connected
while (context.Response.IsClientConnected)
{
Thread.Sleep(1000);
}
}
catch (Exception exc)
{
Trace.TraceError("event source error for http session {0} ({1})", context.Session.SessionID, exc);
}
Trace.TraceInformation("event source closed for http session {0}", context.Session.SessionID);
}