XElement ITwilioContext.GetElement(NativeActivityContext context)
{
// look up current element scope
var id = (Guid?)context.Properties.Find("Twilio.Activities_ScopeElementId");
if (id == null)
{
return(TwilioResponse);
}
// resolve element at scope, or simply return root
return(TwilioResponse.DescendantsAndSelf()
.FirstOrDefault(i => (Guid?)i.Attribute(tmpNs + "id") == id) ?? TwilioResponse);
}
/// <summary>
/// Invoked when a web request arrives.
/// </summary>
public void ProcessRequest(HttpContext context)
{
try
{
// bind ourselves to the context
Context = context;
// request was for a resource
if (Request[ResourceQueryKey] != null)
{
// handle it and return, no need to deal with workflow
ProcessResourceRequest(Request[ResourceQueryKey]);
return;
}
// obtain our activity instance
Activity = CreateActivity();
// configure application
WorkflowApplication = Request[InstanceIdQueryKey] == null ? new WorkflowApplication(Activity, GetArguments()) : new WorkflowApplication(Activity);
WorkflowApplication.Extensions.Add <ITwilioContext>(() => this);
WorkflowApplication.SynchronizationContext = new SynchronizedSynchronizationContext();
WorkflowApplication.InstanceStore = CreateInstanceStore();
WorkflowApplication.Aborted = OnAborted;
WorkflowApplication.Completed = OnCompleted;
WorkflowApplication.Idle = OnIdle;
WorkflowApplication.OnUnhandledException = OnUnhandledException;
WorkflowApplication.PersistableIdle = OnPersistableIdle;
WorkflowApplication.Unloaded = OnUnloaded;
// attempt to resolve current instance id and reload workflow state
if (Request[InstanceIdQueryKey] != null)
{
WorkflowApplication.Load(Guid.Parse(Request[InstanceIdQueryKey]), Timeout);
}
// postback to resume a bookmark
if (Request[BookmarkQueryKey] != null)
{
WorkflowApplication.ResumeBookmark(Request[BookmarkQueryKey], GetPostData(), Timeout);
}
else
{
// begin running the workflow from the start
WorkflowApplication.Run(Timeout);
}
// throw exception
if (UnhandledExceptionInfo != null)
{
UnhandledExceptionInfo.Throw();
}
// strip off temporary attributes
foreach (var element in TwilioResponse.DescendantsAndSelf())
{
foreach (var attribute in element.Attributes())
{
if (attribute.Name.Namespace == tmpNs)
{
attribute.Remove();
}
}
}
// write finished twilio output
Response.ContentType = "text/xml";
using (var wrt = XmlWriter.Create(Response.Output))
TwilioResponse.WriteTo(wrt);
// if we've reached the end, no need to force unload
WorkflowApplication = null;
}
finally
{
// clean up application if possible
if (WorkflowApplication != null)
{
try
{
WorkflowApplication.Unload(Timeout);
WorkflowApplication = null;
}
catch
{
// ignore
}
}
}
}
