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//------------------------------------------------------------------------------
// <copyright file="HttpTaskAsyncHandler.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
/*
* Assists in converting an HTTP Handler written using the Task Asynchronous Pattern to an IHttpAsyncHandler.
*
* Copyright (c) 2010 Microsoft Corporation
*/
namespace System.Web {
using System;
using System.ComponentModel;
using System.Threading.Tasks;
public abstract class HttpTaskAsyncHandler : IHttpAsyncHandler {
public virtual bool IsReusable {
get {
// Default implementation - can be overridden by developer.
return false;
}
}
[EditorBrowsable(EditorBrowsableState.Never)]
public virtual void ProcessRequest(HttpContext context) {
// Default implementation is that this isn't synchronously callable - can be overridden by developer.
string errorMessage = SR.GetString(SR.HttpTaskAsyncHandler_CannotExecuteSynchronously, GetType());
throw new NotSupportedException(errorMessage);
}
// This is the method we actually expect developers to override.
public abstract Task ProcessRequestAsync(HttpContext context);
#region IHttpAsyncHandler methods
IAsyncResult IHttpAsyncHandler.BeginProcessRequest(HttpContext context, AsyncCallback cb, object extraData) {
return TaskAsyncHelper.BeginTask(() => ProcessRequestAsync(context), cb, extraData);
}
void IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) {
TaskAsyncHelper.EndTask(result);
}
#endregion
}
}
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