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//------------------------------------------------------------------------------
// <copyright file="TransferRequestHandler.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.Handlers {
using System;
using System.Threading.Tasks;
using System.Web.Hosting;
internal class TransferRequestHandler : IHttpAsyncHandler {
public IAsyncResult BeginProcessRequest(HttpContext context, AsyncCallback cb, object extraData)
{
return TaskAsyncHelper.BeginTask(() => ProcessRequestAsync(context), cb, extraData);
}
public void EndProcessRequest(IAsyncResult result)
{
TaskAsyncHelper.EndTask(result);
}
private Task ProcessRequestAsync(HttpContext context) {
IIS7WorkerRequest wr = context.WorkerRequest as IIS7WorkerRequest;
if (wr == null) {
throw new PlatformNotSupportedException(SR.GetString(SR.Requires_Iis_Integrated_Mode));
}
// Dev10 848405: use original unencoded URL (i.e., pass null for url so W3_REQUEST::SetUrl is not called)
// Dev11 32511: Extensionless URL Handler should not pass parent IHttpUser to child requests
wr.ScheduleExecuteUrl(null,
null,
null,
true,
context.Request.EntityBody,
null,
preserveUser: false);
// force the completion of the current request so that the
// child execution can be performed immediately after unwind
var releaseStateTask = context.ApplicationInstance.EnsureReleaseStateAsync();
// DevDiv Bugs 162750: IIS7 Integrated Mode: TransferRequest performance issue
// Instead of calling Response.End we call HttpApplication.CompleteRequest()
if (releaseStateTask.IsCompleted) {
context.ApplicationInstance.CompleteRequest();
return TaskAsyncHelper.CompletedTask;
}
else {
return releaseStateTask.ContinueWith((_) => context.ApplicationInstance.CompleteRequest());
}
}
public void ProcessRequest(HttpContext context)
{
string errorMessage = SR.GetString(SR.HttpTaskAsyncHandler_CannotExecuteSynchronously, GetType());
throw new NotSupportedException(errorMessage);
}
public bool IsReusable {
get {
return true;
}
}
}
}
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