/// <summary>
/// Begins an ansynchronous receive operation.
/// </summary>
/// <param name="callback">The callback method.</param>
/// <param name="state">The user state.</param>
/// <returns>The result of the asynchronous operation.</returns>
public IAsyncResult BeginReceive(AsyncCallback callback, object state)
{
ListenerAsyncResult result =
new ListenerAsyncResult()
{
Buffer = new byte[65535],
EndPoint = this.endPoint,
Callback = callback,
State = state
};
result.AsyncResult = this.socket.BeginReceiveFrom(result.Buffer, 0, 65535, SocketFlags.None, ref result.EndPoint, OnSocketCallback, result);
return result;
}
public HttpListenerContext GetContext()
{
if (_state == State.Stopped)
{
throw new InvalidOperationException(SR.Format(SR.net_listener_mustcall, "Start()"));
}
if (_prefixes.Count == 0)
{
throw new InvalidOperationException(SR.Format(SR.net_listener_mustcall, "AddPrefix()"));
}
ListenerAsyncResult ares = (ListenerAsyncResult)BeginGetContext(null, null);
ares._inGet = true;
return(EndGetContext(ares));
}
private static void InvokeCallback(object o)
{
ListenerAsyncResult ares = (ListenerAsyncResult)o;
if (ares._forward != null)
{
InvokeCallback(ares._forward);
return;
}
try
{
ares._cb(ares);
}
catch
{
}
}
public HttpListenerContext EndGetContext(IAsyncResult asyncResult)
{
CheckDisposed();
if (asyncResult == null)
{
throw new ArgumentNullException(nameof(asyncResult));
}
ListenerAsyncResult ares = asyncResult as ListenerAsyncResult;
if (ares == null)
{
throw new ArgumentException(SR.net_io_invalidasyncresult, nameof(asyncResult));
}
if (ares._endCalled)
{
throw new InvalidOperationException(SR.Format(SR.net_io_invalidendcall, nameof(EndGetContext)));
}
ares._endCalled = true;
if (!ares.IsCompleted)
{
ares.AsyncWaitHandle.WaitOne();
}
lock ((_asyncWaitQueue as ICollection).SyncRoot)
{
int idx = _asyncWaitQueue.IndexOf(ares);
if (idx >= 0)
{
_asyncWaitQueue.RemoveAt(idx);
}
}
HttpListenerContext context = ares.GetContext();
context.ParseAuthentication(SelectAuthenticationScheme(context));
return(context);
}
public HttpListenerContext EndGetContext(IAsyncResult asyncResult)
{
CheckDisposed();
if (asyncResult == null)
{
throw new ArgumentNullException("asyncResult");
}
ListenerAsyncResult ares = asyncResult as ListenerAsyncResult;
if (ares == null)
{
throw new ArgumentException("Wrong IAsyncResult.", "asyncResult");
}
if (ares.EndCalled)
{
throw new ArgumentException("Cannot reuse this IAsyncResult");
}
ares.EndCalled = true;
if (!ares.IsCompleted)
{
ares.AsyncWaitHandle.WaitOne();
}
lock (wait_queue)
{
int idx = wait_queue.IndexOf(ares);
if (idx >= 0)
{
wait_queue.RemoveAt(idx);
}
}
HttpListenerContext context = ares.GetContext();
context.ParseAuthentication(SelectAuthenticationScheme(context));
return(context); // This will throw on error.
}
internal void RegisterContext(HttpListenerContext context)
{
lock (_registry)
_registry[context] = context;
ListenerAsyncResult ares = null;
lock (_waitQueue)
{
if (_waitQueue.Count == 0)
{
lock (_ctxQueue)
_ctxQueue.Add(context);
}
else
{
ares = (ListenerAsyncResult)_waitQueue[0];
_waitQueue.RemoveAt(0);
}
}
ares?.Complete(context);
}
internal void RegisterContext(HttpListenerContext context)
{
try {
Monitor.Enter(registry);
registry [context] = context;
Monitor.Enter(wait_queue);
Monitor.Enter(ctx_queue);
if (wait_queue.Count == 0)
{
ctx_queue.Add(context);
}
else
{
ListenerAsyncResult ares = (ListenerAsyncResult)wait_queue [0];
wait_queue.RemoveAt(0);
ares.Complete(context);
}
} finally {
Monitor.Exit(ctx_queue);
Monitor.Exit(wait_queue);
Monitor.Exit(registry);
}
}
private void Cleanup(bool close_existing)
{
Hashtable obj = this.registry;
lock (obj)
{
if (close_existing)
{
foreach (object obj2 in this.registry.Keys)
{
HttpListenerContext httpListenerContext = (HttpListenerContext)obj2;
httpListenerContext.Connection.Close();
}
this.registry.Clear();
}
ArrayList obj3 = this.ctx_queue;
lock (obj3)
{
foreach (object obj4 in this.ctx_queue)
{
HttpListenerContext httpListenerContext2 = (HttpListenerContext)obj4;
httpListenerContext2.Connection.Close();
}
this.ctx_queue.Clear();
}
ArrayList obj5 = this.wait_queue;
lock (obj5)
{
foreach (object obj6 in this.wait_queue)
{
ListenerAsyncResult listenerAsyncResult = (ListenerAsyncResult)obj6;
listenerAsyncResult.Complete("Listener was closed.");
}
this.wait_queue.Clear();
}
}
}
internal void RegisterContext(HttpListenerContext context)
{
lock (registry)
registry [context] = context;
ListenerAsyncResult ares = null;
lock (wait_queue) {
if (wait_queue.Count == 0)
{
lock (ctx_queue)
ctx_queue.Add(context);
}
else
{
ares = (ListenerAsyncResult)wait_queue [0];
wait_queue.RemoveAt(0);
}
}
if (ares != null)
{
ares.Complete(context);
}
}
private static unsafe void WaitCallback(uint errorCode, uint numBytes, NativeOverlapped *nativeOverlapped)
{
ListenerAsyncResult asyncResult = (ListenerAsyncResult)ThreadPoolBoundHandle.GetNativeOverlappedState(nativeOverlapped);
IOCompleted(asyncResult, errorCode, numBytes);
}
private static void IOCompleted(ListenerAsyncResult asyncResult, uint errorCode, uint numBytes)
{
object result = null;
try
{
GlobalLog.Print("ListenerAsyncResult#" + ValidationHelper.HashString(asyncResult) + "::WaitCallback() errorCode:[" + errorCode.ToString() + "] numBytes:[" + numBytes.ToString() + "]");
if (errorCode != UnsafeNclNativeMethods.ErrorCodes.ERROR_SUCCESS &&
errorCode != UnsafeNclNativeMethods.ErrorCodes.ERROR_MORE_DATA)
{
asyncResult.ErrorCode = (int)errorCode;
result = new HttpListenerException((int)errorCode);
}
else
{
HttpListener httpWebListener = asyncResult.AsyncObject as HttpListener;
if (errorCode == UnsafeNclNativeMethods.ErrorCodes.ERROR_SUCCESS)
{
// at this point we have received an unmanaged HTTP_REQUEST and memoryBlob
// points to it we need to hook up our authentication handling code here.
bool stoleBlob = false;
try
{
if (httpWebListener.ValidateRequest(asyncResult.m_RequestContext))
{
result = httpWebListener.HandleAuthentication(asyncResult.m_RequestContext, out stoleBlob);
}
}
finally
{
if (stoleBlob)
{
// The request has been handed to the user, which means this code can't reuse the blob. Reset it here.
asyncResult.m_RequestContext = result == null ? new AsyncRequestContext(asyncResult) : null;
}
else
{
asyncResult.m_RequestContext.Reset(0, 0);
}
}
}
else
{
asyncResult.m_RequestContext.Reset(asyncResult.m_RequestContext.RequestBlob->RequestId, numBytes);
}
// We need to issue a new request, either because auth failed, or because our buffer was too small the first time.
if (result==null)
{
uint statusCode = asyncResult.QueueBeginGetContext();
if (statusCode != UnsafeNclNativeMethods.ErrorCodes.ERROR_SUCCESS &&
statusCode != UnsafeNclNativeMethods.ErrorCodes.ERROR_IO_PENDING)
{
// someother bad error, possible(?) return values are:
// ERROR_INVALID_HANDLE, ERROR_INSUFFICIENT_BUFFER, ERROR_OPERATION_ABORTED
result = new HttpListenerException((int)statusCode);
}
}
if (result==null) {
return;
}
}
// complete the async IO and invoke the callback
GlobalLog.Print("ListenerAsyncResult#" + ValidationHelper.HashString(asyncResult) + "::WaitCallback() calling Complete()");
}
catch (Exception exception)
{
if (NclUtilities.IsFatal(exception)) throw;
GlobalLog.Print("ListenerAsyncResult#" + ValidationHelper.HashString(asyncResult) + "::WaitCallback() Caught exception:" + exception.ToString());
result = exception;
}
asyncResult.InvokeCallback(result);
}
private static void IOCompleted(ListenerAsyncResult asyncResult, uint errorCode, uint numBytes)
{
object result = null;
try
{
if (NetEventSource.IsEnabled) NetEventSource.Info(null, $"errorCode:[{errorCode}] numBytes:[{numBytes}]");
if (errorCode != Interop.HttpApi.ERROR_SUCCESS &&
errorCode != Interop.HttpApi.ERROR_MORE_DATA)
{
asyncResult.ErrorCode = (int)errorCode;
result = new HttpListenerException((int)errorCode);
}
else
{
HttpListener httpWebListener = asyncResult.AsyncObject as HttpListener;
if (errorCode == Interop.HttpApi.ERROR_SUCCESS)
{
// at this point we have received an unmanaged HTTP_REQUEST and memoryBlob
// points to it we need to hook up our authentication handling code here.
bool stoleBlob = false;
try
{
if (httpWebListener.ValidateRequest(asyncResult._requestContext))
{
result = httpWebListener.HandleAuthentication(asyncResult._requestContext, out stoleBlob);
}
}
finally
{
if (stoleBlob)
{
// The request has been handed to the user, which means this code can't reuse the blob. Reset it here.
asyncResult._requestContext = result == null ? new AsyncRequestContext(httpWebListener.RequestQueueBoundHandle, asyncResult) : null;
}
else
{
asyncResult._requestContext.Reset(httpWebListener.RequestQueueBoundHandle, 0, 0);
}
}
}
else
{
asyncResult._requestContext.Reset(httpWebListener.RequestQueueBoundHandle, asyncResult._requestContext.RequestBlob->RequestId, numBytes);
}
// We need to issue a new request, either because auth failed, or because our buffer was too small the first time.
if (result == null)
{
uint statusCode = asyncResult.QueueBeginGetContext();
if (statusCode != Interop.HttpApi.ERROR_SUCCESS &&
statusCode != Interop.HttpApi.ERROR_IO_PENDING)
{
// someother bad error, possible return values are:
// ERROR_INVALID_HANDLE, ERROR_INSUFFICIENT_BUFFER, ERROR_OPERATION_ABORTED
result = new HttpListenerException((int)statusCode);
}
}
if (result == null)
{
return;
}
}
// complete the async IO and invoke the callback
if (NetEventSource.IsEnabled) NetEventSource.Info(null, "Calling Complete()");
}
catch (Exception exception) when (!ExceptionCheck.IsFatal(exception))
{
if (NetEventSource.IsEnabled) NetEventSource.Info(null, $"Caught exception: {exception}");
result = exception;
}
asyncResult.InvokeCallback(result);
}
public IAsyncResult BeginGetContext (AsyncCallback callback, Object state)
{
CheckDisposed ();
if (!listening)
throw new InvalidOperationException ("Please, call Start before using this method.");
ListenerAsyncResult ares = new ListenerAsyncResult (callback, state);
// lock wait_queue early to avoid race conditions
lock (wait_queue) {
lock (ctx_queue) {
HttpListenerContext ctx = GetContextFromQueue ();
if (ctx != null) {
ares.Complete (ctx, true);
return ares;
}
}
wait_queue.Add (ares);
}
return ares;
}
public IAsyncResult BeginGetContext(AsyncCallback callback, object state)
{
if (NetEventSource.IsEnabled) NetEventSource.Enter(this);
ListenerAsyncResult asyncResult = null;
try
{
CheckDisposed();
if (_state == State.Stopped)
{
throw new InvalidOperationException(SR.Format(SR.net_listener_mustcall, "Start()"));
}
// prepare the ListenerAsyncResult object (this will have it's own
// event that the user can wait on for IO completion - which means we
// need to signal it when IO completes)
asyncResult = new ListenerAsyncResult(this, state, callback);
uint statusCode = asyncResult.QueueBeginGetContext();
if (statusCode != Interop.HttpApi.ERROR_SUCCESS &&
statusCode != Interop.HttpApi.ERROR_IO_PENDING)
{
// someother bad error, return values are:
// ERROR_INVALID_HANDLE, ERROR_INSUFFICIENT_BUFFER, ERROR_OPERATION_ABORTED
throw new HttpListenerException((int)statusCode);
}
}
catch (Exception exception)
{
if (NetEventSource.IsEnabled) NetEventSource.Error(this, $"BeginGetContext {exception}");
throw;
}
finally
{
if (NetEventSource.IsEnabled) NetEventSource.Exit(this);
}
return asyncResult;
}
static void InvokeCallback(object o)
{
ListenerAsyncResult ares = (ListenerAsyncResult)o;
ares.cb(ares);
}
/// <summary>
/// Begins an asynchronous send operation.
/// </summary>
/// <param name="buffer">The buffer.</param>
/// <param name="offset">The offset.</param>
/// <param name="length">The sending data length.</param>
/// <param name="endPoint">The end point.</param>
/// <param name="callback">The callback method.</param>
/// <param name="state">The user state.</param>
/// <returns>The asynchronous result.</returns>
public IAsyncResult BeginSend(byte[] buffer, int offset, int length, IPEndPoint endPoint, AsyncCallback callback, object state)
{
ListenerAsyncResult result =
new ListenerAsyncResult()
{
Callback = callback,
State = state
};
result.AsyncResult = this.socket.BeginSendTo(buffer, offset, length, SocketFlags.None, endPoint, OnSocketCallback, result);
return result;
}
internal AsyncRequestContext(ListenerAsyncResult result)
{
this.m_Result = result;
base.BaseConstruction(this.Allocate(0));
}
private static void IOCompleted(ListenerAsyncResult asyncResult, uint errorCode, uint numBytes)
{
object result = null;
try
{
GlobalLog.Print("ListenerAsyncResult#" + ValidationHelper.HashString(asyncResult) + "::WaitCallback() errorCode:[" + errorCode.ToString() + "] numBytes:[" + numBytes.ToString() + "]");
if (errorCode != UnsafeNclNativeMethods.ErrorCodes.ERROR_SUCCESS &&
errorCode != UnsafeNclNativeMethods.ErrorCodes.ERROR_MORE_DATA)
{
asyncResult.ErrorCode = (int)errorCode;
result = new HttpListenerException((int)errorCode);
}
else
{
HttpListener httpWebListener = asyncResult.AsyncObject as HttpListener;
if (errorCode == UnsafeNclNativeMethods.ErrorCodes.ERROR_SUCCESS)
{
// at this point we have received an unmanaged HTTP_REQUEST and memoryBlob
// points to it we need to hook up our authentication handling code here.
bool stoleBlob = false;
try
{
if (httpWebListener.ValidateRequest(asyncResult.m_RequestContext))
{
result = httpWebListener.HandleAuthentication(asyncResult.m_RequestContext, out stoleBlob);
}
}
finally
{
if (stoleBlob)
{
// The request has been handed to the user, which means this code can't reuse the blob. Reset it here.
asyncResult.m_RequestContext = result == null ? new AsyncRequestContext(asyncResult) : null;
}
else
{
asyncResult.m_RequestContext.Reset(0, 0);
}
}
}
else
{
asyncResult.m_RequestContext.Reset(asyncResult.m_RequestContext.RequestBlob->RequestId, numBytes);
}
// We need to issue a new request, either because auth failed, or because our buffer was too small the first time.
if (result == null)
{
uint statusCode = asyncResult.QueueBeginGetContext();
if (statusCode != UnsafeNclNativeMethods.ErrorCodes.ERROR_SUCCESS &&
statusCode != UnsafeNclNativeMethods.ErrorCodes.ERROR_IO_PENDING)
{
// someother bad error, possible(?) return values are:
// ERROR_INVALID_HANDLE, ERROR_INSUFFICIENT_BUFFER, ERROR_OPERATION_ABORTED
result = new HttpListenerException((int)statusCode);
}
}
if (result == null)
{
return;
}
}
// complete the async IO and invoke the callback
GlobalLog.Print("ListenerAsyncResult#" + ValidationHelper.HashString(asyncResult) + "::WaitCallback() calling Complete()");
}
catch (Exception exception)
{
if (NclUtilities.IsFatal(exception))
{
throw;
}
GlobalLog.Print("ListenerAsyncResult#" + ValidationHelper.HashString(asyncResult) + "::WaitCallback() Caught exception:" + exception.ToString());
result = exception;
}
asyncResult.InvokeCallback(result);
}
internal void Complete(HttpListenerContext context, bool synch)
{
if (this.forward != null)
{
this.forward.Complete(context, synch);
return;
}
this.synch = synch;
this.context = context;
object obj = this.locker;
lock (obj)
{
AuthenticationSchemes authenticationSchemes = context.Listener.SelectAuthenticationScheme(context);
if ((authenticationSchemes == AuthenticationSchemes.Basic || context.Listener.AuthenticationSchemes == AuthenticationSchemes.Negotiate) && context.Request.Headers["Authorization"] == null)
{
context.Response.StatusCode = 401;
context.Response.Headers["WWW-Authenticate"] = string.Concat(new object[]
{
authenticationSchemes,
" realm=\"",
context.Listener.Realm,
"\""
});
context.Response.OutputStream.Close();
IAsyncResult asyncResult = context.Listener.BeginGetContext(this.cb, this.state);
this.forward = (ListenerAsyncResult)asyncResult;
object obj2 = this.forward.locker;
lock (obj2)
{
if (this.handle != null)
{
this.forward.handle = this.handle;
}
}
ListenerAsyncResult listenerAsyncResult = this.forward;
int num = 0;
while (listenerAsyncResult.forward != null)
{
if (num > 20)
{
this.Complete("Too many authentication errors");
}
listenerAsyncResult = listenerAsyncResult.forward;
num++;
}
}
else
{
this.completed = true;
if (this.handle != null)
{
this.handle.Set();
}
if (this.cb != null)
{
ThreadPool.QueueUserWorkItem(new WaitCallback(ListenerAsyncResult.InvokeCallback), this);
}
}
}
}
internal AsyncRequestContext(ListenerAsyncResult result)
{
this.m_Result = result;
base.BaseConstruction(this.Allocate(0));
}
private static void IOCompleted(ListenerAsyncResult asyncResult, uint errorCode, uint numBytes)
{
object result = null;
try
{
if (NetEventSource.IsEnabled)
{
NetEventSource.Info(null, $"errorCode:[{errorCode}] numBytes:[{numBytes}]");
}
if (errorCode != Interop.HttpApi.ERROR_SUCCESS &&
errorCode != Interop.HttpApi.ERROR_MORE_DATA)
{
asyncResult.ErrorCode = (int)errorCode;
result = new HttpListenerException((int)errorCode);
}
else
{
HttpListener httpWebListener = asyncResult.AsyncObject as HttpListener;
if (errorCode == Interop.HttpApi.ERROR_SUCCESS)
{
// at this point we have received an unmanaged HTTP_REQUEST and memoryBlob
// points to it we need to hook up our authentication handling code here.
bool stoleBlob = false;
try
{
if (httpWebListener.ValidateRequest(asyncResult._requestContext))
{
result = httpWebListener.HandleAuthentication(asyncResult._requestContext, out stoleBlob);
}
}
finally
{
if (stoleBlob)
{
// The request has been handed to the user, which means this code can't reuse the blob. Reset it here.
asyncResult._requestContext = result == null ? new AsyncRequestContext(httpWebListener.RequestQueueBoundHandle, asyncResult) : null;
}
else
{
asyncResult._requestContext.Reset(httpWebListener.RequestQueueBoundHandle, 0, 0);
}
}
}
else
{
asyncResult._requestContext.Reset(httpWebListener.RequestQueueBoundHandle, asyncResult._requestContext.RequestBlob->RequestId, numBytes);
}
// We need to issue a new request, either because auth failed, or because our buffer was too small the first time.
if (result == null)
{
uint statusCode = asyncResult.QueueBeginGetContext();
if (statusCode != Interop.HttpApi.ERROR_SUCCESS &&
statusCode != Interop.HttpApi.ERROR_IO_PENDING)
{
// someother bad error, possible return values are:
// ERROR_INVALID_HANDLE, ERROR_INSUFFICIENT_BUFFER, ERROR_OPERATION_ABORTED
result = new HttpListenerException((int)statusCode);
}
}
if (result == null)
{
return;
}
}
// complete the async IO and invoke the callback
if (NetEventSource.IsEnabled)
{
NetEventSource.Info(null, "Calling Complete()");
}
}
catch (Exception exception) when(!ExceptionCheck.IsFatal(exception))
{
if (NetEventSource.IsEnabled)
{
NetEventSource.Info(null, $"Caught exception: {exception}");
}
result = exception;
}
asyncResult.InvokeCallback(result);
}
WaitCallback(
Object state,
bool signaled)
{
GlobalLog.Print("entering the WaitCallback()");
//
// take the ListenerAsyncResult object from the state
//
ListenerAsyncResult AResult = ( ListenerAsyncResult )state;
GlobalLog.Print("got the AResult object");
bool syncComplete = AResult.CompletedSynchronously;
if (!syncComplete)
{
//
// we've been called by the thread, the event was signaled
// call HackedGetOverlappedResult() to find out about the IO
//
GlobalLog.Print("WaitCallback()!call didn't complete sync calling HackedGetOverlappedResult():");
AResult.m_BytesReturned =
Win32.HackedGetOverlappedResult(
AResult.m_Overlapped);
if (AResult.m_BytesReturned <= 0)
{
//
// something went wrong throw for now, later we should
// call into ul call again
//
throw new InvalidOperationException("UlReceiveHttpRequest(callback) failure m_BytesReturned:" + Convert.ToString(AResult.m_BytesReturned));
}
if (AResult.m_BufferSize < AResult.m_BytesReturned)
{
//
// this is anlogous to the syncronous case in which we get
// result == NativeMethods.ERROR_MORE_DATA
// basically the buffer is not big enought to accomodate the
// reqeust that came in, so grow it to the needed size, copy
// the valid data, and reissue the async call and queue it
// up to the ThreadPool
//
throw new InvalidOperationException("UlReceiveHttpRequest(callback) buffer too small, was:" + Convert.ToString(AResult.m_BufferSize) + " should be:" + Convert.ToString(AResult.m_BytesReturned));
}
}
GlobalLog.Print("WaitCallback()!I/O status is"
+ " AResult.m_BytesReturned: " + Convert.ToString(AResult.m_BytesReturned)
+ " AResult.m_Overlapped: " + Convert.ToString(AResult.m_Overlapped)
+ " AResult.m_SyncComplete: " + Convert.ToString(AResult.CompletedSynchronously));
//
// complete the async IO and invoke the callback
//
AResult.InvokeCallback(syncComplete, new HttpListenerWebRequest(AResult.m_Buffer, AResult.m_BytesReturned, m_AppPoolHandle));
return;
} // WaitCallback()
private static unsafe void WaitCallback(uint errorCode, uint numBytes, NativeOverlapped *nativeOverlapped)
{
ListenerAsyncResult asyncResult = (ListenerAsyncResult)Overlapped.Unpack(nativeOverlapped).AsyncResult;
object result = null;
try
{
if ((errorCode != 0) && (errorCode != 0xea))
{
asyncResult.ErrorCode = (int)errorCode;
result = new HttpListenerException((int)errorCode);
}
else
{
HttpListener asyncObject = asyncResult.AsyncObject as HttpListener;
if (errorCode == 0)
{
bool stoleBlob = false;
try
{
result = asyncObject.HandleAuthentication(asyncResult.m_RequestContext, out stoleBlob);
}
finally
{
if (stoleBlob)
{
asyncResult.m_RequestContext = (result == null) ? new AsyncRequestContext(asyncResult) : null;
}
else
{
asyncResult.m_RequestContext.Reset(0L, 0);
}
}
}
else
{
asyncResult.m_RequestContext.Reset(asyncResult.m_RequestContext.RequestBlob.RequestId, numBytes);
}
if (result == null)
{
uint num = asyncResult.QueueBeginGetContext();
if ((num != 0) && (num != 0x3e5))
{
result = new HttpListenerException((int)num);
}
}
if (result == null)
{
return;
}
}
}
catch (Exception exception)
{
if (NclUtilities.IsFatal(exception))
{
throw;
}
result = exception;
}
asyncResult.InvokeCallback(result);
}
internal AsyncRequestContext(ThreadPoolBoundHandle boundHandle, ListenerAsyncResult result)
{
_result = result;
BaseConstruction(Allocate(boundHandle, 0));
}
BeginGetRequest(
AsyncCallback requestCallback,
Object stateObject)
{
//
// Validation
//
if (m_AppPoolHandle == NativeMethods.INVALID_HANDLE_VALUE)
{
throw new InvalidOperationException("The AppPool handle is invalid");
}
//
// prepare the ListenerAsyncResult object ( this will have it's own
// event that the user can wait on for IO completion - which means we
// need to signal it when IO completes )
//
GlobalLog.Print("BeginGetRequest() creating ListenerAsyncResult");
ListenerAsyncResult AResult = new ListenerAsyncResult(
stateObject,
requestCallback);
AutoResetEvent m_Event = new AutoResetEvent(false);
Marshal.WriteIntPtr(
AResult.m_Overlapped,
Win32.OverlappedhEventOffset,
m_Event.Handle);
//
// issue unmanaged call until we read enough data:
// usually starting with a InitialBufferSize==4096 bytes we should be
// able to get all the headers ( and part of the entity body, if any
// is present ), if we don't, if the call didn't fail for othe reasons,
// we get indication in BytesReturned, on how big the buffer should be
// to receive the data available, so usually the second call will
// succeed, but we have to consider the case of two competing calls
// for the same RequestId, and that's why we need a loop and not just
// a try/retry-expecting-success fashion
//
int result;
for (;;)
{
//
// check if we're in a healthy state
//
if (AResult.m_Retries++ > m_MaxRetries)
{
throw new InvalidOperationException("UlReceiveHttpRequest() Too many retries");
}
result =
ComNetOS.IsWinNt ?
UlSysApi.UlReceiveHttpRequest(
m_AppPoolHandle,
AResult.m_RequestId,
UlConstants.UL_RECEIVE_REQUEST_FLAG_COPY_BODY,
AResult.m_Buffer,
AResult.m_BufferSize,
ref AResult.m_BytesReturned,
AResult.m_Overlapped)
:
UlVxdApi.UlReceiveHttpRequestHeaders(
m_AppPoolHandle,
AResult.m_RequestId,
0,
AResult.m_Buffer,
AResult.m_BufferSize,
ref AResult.m_BytesReturned,
AResult.m_Overlapped);
GlobalLog.Print("UlReceiveHttpRequest() returns:"
+ Convert.ToString(result));
if (result == NativeMethods.ERROR_SUCCESS || result == NativeMethods.ERROR_IO_PENDING)
{
//
// synchronous success or successfull pending: we are done
//
break;
}
if (result == NativeMethods.ERROR_INVALID_PARAMETER)
{
//
// we might get this if somebody stole our RequestId,
// set RequestId to null
//
AResult.m_RequestId = 0;
//
// and start all over again with the buffer we
// just allocated
//
continue;
}
if (result == NativeMethods.ERROR_MORE_DATA)
{
//
// the buffer was not big enough to fit the headers, we need
// to read the RequestId returned, grow the buffer, keeping
// the data already transferred
//
AResult.m_RequestId = Marshal.ReadInt64(IntPtrHelper.Add(AResult.m_Buffer, m_RequestIdOffset));
//
// allocate a new buffer of the required size
//
IntPtr NewBuffer = Marshal.AllocHGlobal(AResult.m_BytesReturned);
//
// copy the data already read from the old buffer into the
// new one
//
NativeMethods.CopyMemory(NewBuffer, AResult.m_Buffer, AResult.m_BufferSize);
//
// free the old buffer
//
Marshal.FreeHGlobal(AResult.m_Buffer);
//
// update buffer pointer and size
//
AResult.m_Buffer = NewBuffer;
AResult.m_BufferSize = AResult.m_BytesReturned;
AResult.m_BytesReturned = 0;
//
// and start all over again with the new buffer
//
continue;
}
//
// someother bad error, possible( ? ) return values are:
//
// ERROR_INVALID_HANDLE
// ERROR_INSUFFICIENT_BUFFER
// ERROR_OPERATION_ABORTED
// ERROR_IO_PENDING
//
throw new InvalidOperationException("UlReceiveHttpRequest() failed, err#" + Convert.ToString(result));
}
//
// we get here only if a break happens, i.e.
// 1) syncronous completion
// 2) the IO pended
//
if (result == NativeMethods.ERROR_SUCCESS)
{
//
// set syncronous completion to true
//
AResult.Complete(true);
//
// and call the internal callback
//
WaitCallback(AResult, false);
}
else
{
//
// create a new delegate
// and spin a new thread from the thread pool to wake up when the
// event is signaled and call the delegate
//
ThreadPool.RegisterWaitForSingleObject(
m_Event,
new WaitOrTimerCallback(WaitCallback),
AResult,
-1,
true);
}
GlobalLog.Print("returning AResult");
return(AResult);
} // StartListen()
internal void Complete (HttpListenerContext context, bool synch)
{
if (forward != null) {
forward.Complete (context, synch);
return;
}
this.synch = synch;
this.context = context;
lock (locker) {
AuthenticationSchemes schemes = context.Listener.SelectAuthenticationScheme (context);
if ((schemes == AuthenticationSchemes.Basic || context.Listener.AuthenticationSchemes == AuthenticationSchemes.Negotiate) && context.Request.Headers ["Authorization"] == null) {
context.Response.StatusCode = 401;
context.Response.Headers ["WWW-Authenticate"] = schemes + " realm=\"" + context.Listener.Realm + "\"";
context.Response.OutputStream.Close ();
IAsyncResult ares = context.Listener.BeginGetContext (cb, state);
this.forward = (ListenerAsyncResult) ares;
lock (forward.locker) {
if (handle != null)
forward.handle = handle;
}
ListenerAsyncResult next = forward;
for (int i = 0; next.forward != null; i++) {
if (i > 20)
Complete (new HttpListenerException (400, "Too many authentication errors"));
next = next.forward;
}
} else {
completed = true;
if (handle != null)
handle.Set ();
if (cb != null)
ThreadPool.UnsafeQueueUserWorkItem (InvokeCB, this);
}
}
}
internal AsyncRequestContext(ListenerAsyncResult result)
{
m_Result = result;
BaseConstruction(Allocate(0));
}
public IAsyncResult BeginGetContext(AsyncCallback callback, object state)
{
if (Logging.On)
{
Logging.Enter(Logging.HttpListener, this, "BeginGetContext", "");
}
ListenerAsyncResult objectValue = null;
try
{
this.CheckDisposed();
if (this.m_State == null)
{
throw new InvalidOperationException(SR.GetString("net_listener_mustcall", new object[] { "Start()" }));
}
objectValue = new ListenerAsyncResult(this, state, callback);
uint num = objectValue.QueueBeginGetContext();
if ((num != 0) && (num != 0x3e5))
{
throw new HttpListenerException((int) num);
}
}
catch (Exception exception)
{
if (Logging.On)
{
Logging.Exception(Logging.HttpListener, this, "BeginGetContext", exception);
}
throw;
}
finally
{
if (Logging.On)
{
Logging.Enter(Logging.HttpListener, this, "BeginGetContext", "IAsyncResult#" + ValidationHelper.HashString(objectValue));
}
}
return objectValue;
}
internal AsyncRequestContext(ThreadPoolBoundHandle boundHandle, ListenerAsyncResult result)
{
_result = result;
BaseConstruction(Allocate(boundHandle, 0));
}
internal void Complete(HttpListenerContext context, bool synch)
{
if (_forward != null)
{
_forward.Complete(context, synch);
return;
}
_synch = synch;
_context = context;
lock (_locker)
{
bool authFailure = false;
try
{
context.AuthenticationSchemes = context._listener.SelectAuthenticationScheme(context);
}
catch (OutOfMemoryException oom)
{
context.AuthenticationSchemes = AuthenticationSchemes.Anonymous;
_exception = oom;
}
catch
{
authFailure = true;
context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;
}
if (context.AuthenticationSchemes != AuthenticationSchemes.None &&
(context.AuthenticationSchemes & AuthenticationSchemes.Anonymous) != AuthenticationSchemes.Anonymous &&
(context.AuthenticationSchemes & AuthenticationSchemes.Basic) != AuthenticationSchemes.Basic)
{
authFailure = true;
context.Response.StatusCode = (int)HttpStatusCode.Unauthorized;
}
else if (context.AuthenticationSchemes == AuthenticationSchemes.Basic)
{
HttpStatusCode errorCode = HttpStatusCode.Unauthorized;
string authHeader = context.Request.Headers["Authorization"];
if (authHeader == null ||
!HttpListenerContext.IsBasicHeader(authHeader) ||
authHeader.Length < AuthenticationTypes.Basic.Length + 2 ||
!HttpListenerContext.TryParseBasicAuth(authHeader.Substring(AuthenticationTypes.Basic.Length + 1), out errorCode, out string _, out string __))
{
authFailure = true;
context.Response.StatusCode = (int)errorCode;
if (errorCode == HttpStatusCode.Unauthorized)
{
context.Response.Headers["WWW-Authenticate"] = context.AuthenticationSchemes + " realm=\"" + context._listener.Realm + "\"";
}
}
}
if (authFailure)
{
context.Response.OutputStream.Close();
IAsyncResult ares = context._listener.BeginGetContext(_cb, _state);
_forward = (ListenerAsyncResult)ares;
lock (_forward._locker)
{
if (_handle != null)
{
_forward._handle = _handle;
}
}
ListenerAsyncResult next = _forward;
for (int i = 0; next._forward != null; i++)
{
if (i > 20)
{
Complete(new HttpListenerException((int)HttpStatusCode.Unauthorized, SR.net_listener_auth_errors));
}
next = next._forward;
}
}
else
{
_completed = true;
_synch = false;
if (_handle != null)
{
_handle.Set();
}
if (_cb != null)
{
ThreadPool.UnsafeQueueUserWorkItem(s_invokeCB, this);
}
}
}
}
public IAsyncResult BeginGetContext(AsyncCallback callback, object state) {
if(Logging.On)Logging.Enter(Logging.HttpListener, this, "BeginGetContext", "");
ListenerAsyncResult asyncResult = null;
try {
CheckDisposed();
if (m_State==State.Stopped) {
throw new InvalidOperationException(SR.GetString(SR.net_listener_mustcall, "Start()"));
}
// prepare the ListenerAsyncResult object (this will have it's own
// event that the user can wait on for IO completion - which means we
// need to signal it when IO completes)
asyncResult = new ListenerAsyncResult(this, state, callback);
uint statusCode = asyncResult.QueueBeginGetContext();
if (statusCode != UnsafeNclNativeMethods.ErrorCodes.ERROR_SUCCESS &&
statusCode != UnsafeNclNativeMethods.ErrorCodes.ERROR_IO_PENDING)
{
// someother bad error, possible(?) return values are:
// ERROR_INVALID_HANDLE, ERROR_INSUFFICIENT_BUFFER, ERROR_OPERATION_ABORTED
throw new HttpListenerException((int)statusCode);
}
} catch (Exception exception) {
if(Logging.On)Logging.Exception(Logging.HttpListener, this, "BeginGetContext", exception);
throw;
} finally {
if(Logging.On)Logging.Enter(Logging.HttpListener, this, "BeginGetContext", "IAsyncResult#" + ValidationHelper.HashString(asyncResult));
}
return asyncResult;
}
