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<%@ WebHandler Language="C#" Class="OpenIdProviderEndpoint" %>
using System;
using System.Threading;
using System.Threading.Tasks;
using System.Web;
using DotNetOpenAuth.OpenId.Provider;
using DotNetOpenAuth.Messaging;
public class OpenIdProviderEndpoint : IHttpAsyncHandler {
public bool IsReusable {
get { return true; }
}
public IAsyncResult BeginProcessRequest(HttpContext context, System.AsyncCallback cb, object extraData) {
return ToApm(this.ProcessRequestAsync(context), cb, extraData);
}
public void EndProcessRequest(IAsyncResult result) {
((Task)result).Wait(); // rethrows exceptions
}
public void ProcessRequest(HttpContext context) {
this.ProcessRequestAsync(context).GetAwaiter().GetResult();
}
private static Task ToApm(Task task, AsyncCallback callback, object state) {
if (task == null) {
throw new ArgumentNullException("task");
}
var tcs = new TaskCompletionSource<object>(state);
task.ContinueWith(
t => {
if (t.IsFaulted) {
tcs.TrySetException(t.Exception.InnerExceptions);
} else if (t.IsCanceled) {
tcs.TrySetCanceled();
} else {
tcs.TrySetResult(null);
}
if (callback != null) {
callback(tcs.Task);
}
},
CancellationToken.None,
TaskContinuationOptions.None,
TaskScheduler.Default);
return tcs.Task;
}
private async Task ProcessRequestAsync(HttpContext context) {
OpenIdProvider provider = new OpenIdProvider();
IRequest request = await provider.GetRequestAsync(new HttpRequestWrapper(context.Request), context.Response.ClientDisconnectedToken);
if (request != null) {
if (!request.IsResponseReady) {
IAuthenticationRequest authRequest = (IAuthenticationRequest)request;
authRequest.IsAuthenticated = true;
}
var response = await provider.PrepareResponseAsync(request, context.Response.ClientDisconnectedToken);
await response.SendAsync(new HttpResponseWrapper(context.Response), context.Response.ClientDisconnectedToken);
}
}
}
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