public override IAsyncResult BeginWrite(byte[] buffer, int offset, int size, AsyncCallback callback, object state) { GlobalLog.Print("HttpResponseStream#" + ValidationHelper.HashString(this) + "::BeginWrite() buffer.Length:" + buffer.Length + " size:" + size + " offset:" + offset); if (buffer == null) { throw new ArgumentNullException("buffer"); } if (offset < 0 || offset > buffer.Length) { throw new ArgumentOutOfRangeException("offset"); } if (size < 0 || size > buffer.Length - offset) { throw new ArgumentOutOfRangeException("size"); } UnsafeNclNativeMethods.HttpApi.HTTP_FLAGS flags = ComputeLeftToWrite(); if (m_Closed || (size == 0 && m_LeftToWrite != 0)) { if (Logging.On) { Logging.Exit(Logging.HttpListener, this, "BeginWrite", ""); } HttpResponseStreamAsyncResult result = new HttpResponseStreamAsyncResult(this, state, callback); result.InvokeCallback((uint)0); return(result); } if (m_LeftToWrite >= 0 && size > m_LeftToWrite) { throw new ProtocolViolationException(SR.GetString(SR.net_entitytoobig)); } uint statusCode; uint bytesSent = 0; flags |= m_LeftToWrite == size ? UnsafeNclNativeMethods.HttpApi.HTTP_FLAGS.NONE : UnsafeNclNativeMethods.HttpApi.HTTP_FLAGS.HTTP_SEND_RESPONSE_FLAG_MORE_DATA; bool sentHeaders = m_HttpContext.Response.SentHeaders; HttpResponseStreamAsyncResult asyncResult = new HttpResponseStreamAsyncResult(this, state, callback, buffer, offset, size, m_HttpContext.Response.BoundaryType == BoundaryType.Chunked, sentHeaders); // Update m_LeftToWrite now so we can queue up additional BeginWrite's without waiting for EndWrite. UpdateAfterWrite((uint)((m_HttpContext.Response.BoundaryType == BoundaryType.Chunked) ? 0 : size)); try { if (!sentHeaders) { statusCode = m_HttpContext.Response.SendHeaders(null, asyncResult, flags, false); } else { GlobalLog.Print("HttpResponseStream#" + ValidationHelper.HashString(this) + "::BeginWrite() calling UnsafeNclNativeMethods.HttpApi.HttpSendResponseEntityBody"); m_HttpContext.EnsureBoundHandle(); statusCode = UnsafeNclNativeMethods.HttpApi.HttpSendResponseEntityBody( m_HttpContext.RequestQueueHandle, m_HttpContext.RequestId, (uint)flags, asyncResult.dataChunkCount, asyncResult.pDataChunks, &bytesSent, SafeLocalFree.Zero, 0, asyncResult.m_pOverlapped, null); GlobalLog.Print("HttpResponseStream#" + ValidationHelper.HashString(this) + "::BeginWrite() call to UnsafeNclNativeMethods.HttpApi.HttpSendResponseEntityBody returned:" + statusCode); } } catch (Exception e) { if (Logging.On) { Logging.Exception(Logging.HttpListener, this, "BeginWrite", e); } asyncResult.InternalCleanup(); m_Closed = true; m_HttpContext.Abort(); throw; } if (statusCode != UnsafeNclNativeMethods.ErrorCodes.ERROR_SUCCESS && statusCode != UnsafeNclNativeMethods.ErrorCodes.ERROR_IO_PENDING) { asyncResult.InternalCleanup(); if (m_HttpContext.Listener.IgnoreWriteExceptions && sentHeaders) { GlobalLog.Print("HttpResponseStream#" + ValidationHelper.HashString(this) + "::BeginWrite() suppressing error"); } else { Exception exception = new HttpListenerException((int)statusCode); if (Logging.On) { Logging.Exception(Logging.HttpListener, this, "BeginWrite", exception); } m_Closed = true; m_HttpContext.Abort(); throw exception; } } if (statusCode == UnsafeNclNativeMethods.ErrorCodes.ERROR_SUCCESS && HttpListener.SkipIOCPCallbackOnSuccess) { // IO operation completed synchronously - callback won't be called to signal completion. asyncResult.IOCompleted(statusCode, bytesSent); } // Last write, cache it for special cancelation handling. if ((flags & UnsafeNclNativeMethods.HttpApi.HTTP_FLAGS.HTTP_SEND_RESPONSE_FLAG_MORE_DATA) == 0) { m_LastWrite = asyncResult; } if (Logging.On) { Logging.Exit(Logging.HttpListener, this, "BeginWrite", ""); } return(asyncResult); }
/* * 12.3 * HttpSendHttpResponse() and HttpSendResponseEntityBody() Flag Values. * The following flags can be used on calls to HttpSendHttpResponse() and HttpSendResponseEntityBody() API calls: * #define HTTP_SEND_RESPONSE_FLAG_DISCONNECT 0x00000001 #define HTTP_SEND_RESPONSE_FLAG_MORE_DATA 0x00000002 #define HTTP_SEND_RESPONSE_FLAG_RAW_HEADER 0x00000004 #define HTTP_SEND_RESPONSE_FLAG_VALID 0x00000007 * * HTTP_SEND_RESPONSE_FLAG_DISCONNECT: * specifies that the network connection should be disconnected immediately after * sending the response, overriding the HTTP protocol's persistent connection features. * HTTP_SEND_RESPONSE_FLAG_MORE_DATA: * specifies that additional entity body data will be sent by the caller. Thus, * the last call HttpSendResponseEntityBody for a RequestId, will have this flag reset. * HTTP_SEND_RESPONSE_RAW_HEADER: * specifies that a caller of HttpSendResponseEntityBody() is intentionally omitting * a call to HttpSendHttpResponse() in order to bypass normal header processing. The * actual HTTP header will be generated by the application and sent as entity body. * This flag should be passed on the first call to HttpSendResponseEntityBody, and * not after. Thus, flag is not applicable to HttpSendHttpResponse. */ internal unsafe uint SendHeaders(UnsafeNclNativeMethods.HttpApi.HTTP_DATA_CHUNK *pDataChunk, HttpResponseStreamAsyncResult asyncResult, UnsafeNclNativeMethods.HttpApi.HTTP_FLAGS flags, bool isWebSocketHandshake) { GlobalLog.Print("HttpListenerResponse#" + ValidationHelper.HashString(this) + "::SendHeaders() pDataChunk:" + ValidationHelper.ToString((IntPtr)pDataChunk) + " asyncResult:" + ValidationHelper.ToString(asyncResult)); GlobalLog.Assert(!SentHeaders, "HttpListenerResponse#{0}::SendHeaders()|SentHeaders is true.", ValidationHelper.HashString(this)); if (StatusCode == (int)HttpStatusCode.Unauthorized) // User set 401 // Using the configured Auth schemes, populate the auth challenge headers. This is for scenarios where // Anonymous access is allowed for some resources, but the server later determines that authorization // is required for this request. { HttpListenerContext.SetAuthenticationHeaders(); } // Log headers if (Logging.On) { StringBuilder sb = new StringBuilder("HttpListenerResponse Headers:\n"); for (int i = 0; i < Headers.Count; i++) { sb.Append("\t"); sb.Append(Headers.GetKey(i)); sb.Append(" : "); sb.Append(Headers.Get(i)); sb.Append("\n"); } Logging.PrintInfo(Logging.HttpListener, this, ".ctor", sb.ToString()); } m_ResponseState = ResponseState.SentHeaders; /* * if (m_BoundaryType==BoundaryType.Raw) { * use HTTP_SEND_RESPONSE_FLAG_RAW_HEADER; * } */ uint statusCode; uint bytesSent; List <GCHandle> pinnedHeaders = SerializeHeaders(ref m_NativeResponse.Headers, isWebSocketHandshake); try { if (pDataChunk != null) { m_NativeResponse.EntityChunkCount = 1; m_NativeResponse.pEntityChunks = pDataChunk; } else if (asyncResult != null && asyncResult.pDataChunks != null) { m_NativeResponse.EntityChunkCount = asyncResult.dataChunkCount; m_NativeResponse.pEntityChunks = asyncResult.pDataChunks; } else { m_NativeResponse.EntityChunkCount = 0; m_NativeResponse.pEntityChunks = null; } GlobalLog.Print("HttpListenerResponse#" + ValidationHelper.HashString(this) + "::SendHeaders() calling UnsafeNclNativeMethods.HttpApi.HttpSendHttpResponse flags:" + flags); if (StatusDescription.Length > 0) { byte[] statusDescriptionBytes = new byte[WebHeaderCollection.HeaderEncoding.GetByteCount(StatusDescription)]; fixed(byte *pStatusDescription = statusDescriptionBytes) { m_NativeResponse.ReasonLength = (ushort)statusDescriptionBytes.Length; WebHeaderCollection.HeaderEncoding.GetBytes(StatusDescription, 0, statusDescriptionBytes.Length, statusDescriptionBytes, 0); m_NativeResponse.pReason = (sbyte *)pStatusDescription; fixed(UnsafeNclNativeMethods.HttpApi.HTTP_RESPONSE *pResponse = &m_NativeResponse) { if (asyncResult != null) { HttpListenerContext.EnsureBoundHandle(); } statusCode = UnsafeNclNativeMethods.HttpApi.HttpSendHttpResponse( HttpListenerContext.RequestQueueHandle, HttpListenerRequest.RequestId, (uint)flags, pResponse, null, &bytesSent, SafeLocalFree.Zero, 0, asyncResult == null ? null : asyncResult.m_pOverlapped, null); if (asyncResult != null && statusCode == UnsafeNclNativeMethods.ErrorCodes.ERROR_SUCCESS && HttpListener.SkipIOCPCallbackOnSuccess) { asyncResult.IOCompleted(statusCode, bytesSent); // IO operation completed synchronously - callback won't be called to signal completion. } } } } else { fixed(UnsafeNclNativeMethods.HttpApi.HTTP_RESPONSE *pResponse = &m_NativeResponse) { if (asyncResult != null) { HttpListenerContext.EnsureBoundHandle(); } statusCode = UnsafeNclNativeMethods.HttpApi.HttpSendHttpResponse( HttpListenerContext.RequestQueueHandle, HttpListenerRequest.RequestId, (uint)flags, pResponse, null, &bytesSent, SafeLocalFree.Zero, 0, asyncResult == null ? null : asyncResult.m_pOverlapped, null); if (asyncResult != null && statusCode == UnsafeNclNativeMethods.ErrorCodes.ERROR_SUCCESS && HttpListener.SkipIOCPCallbackOnSuccess) { asyncResult.IOCompleted(statusCode, bytesSent); // IO operation completed synchronously - callback won't be called to signal completion. } } } GlobalLog.Print("HttpListenerResponse#" + ValidationHelper.HashString(this) + "::SendHeaders() call to UnsafeNclNativeMethods.HttpApi.HttpSendHttpResponse returned:" + statusCode); } finally { FreePinnedHeaders(pinnedHeaders); } return(statusCode); }