internal static string GetSupportedVersion()
{
if (s_webSocketDllHandle.IsInvalid)
{
WebSocketValidate.ThrowPlatformNotSupportedException_WSPC();
}
SafeWebSocketHandle webSocketHandle = null;
try
{
int errorCode = Interop.WebSocket.WebSocketCreateClientHandle(null, 0, out webSocketHandle);
ThrowOnError(errorCode);
if (webSocketHandle == null ||
webSocketHandle.IsInvalid)
{
WebSocketValidate.ThrowPlatformNotSupportedException_WSPC();
}
IntPtr additionalHeadersPtr;
uint additionalHeaderCount;
errorCode = Interop.WebSocket.WebSocketBeginClientHandshake(webSocketHandle,
IntPtr.Zero,
0,
IntPtr.Zero,
0,
s_initialClientRequestHeaders,
(uint)s_initialClientRequestHeaders.Length,
out additionalHeadersPtr,
out additionalHeaderCount);
ThrowOnError(errorCode);
Interop.WebSocket.HttpHeader[] additionalHeaders = MarshalHttpHeaders(additionalHeadersPtr, (int)additionalHeaderCount);
string version = null;
foreach (Interop.WebSocket.HttpHeader header in additionalHeaders)
{
if (string.Compare(header.Name,
HttpKnownHeaderNames.SecWebSocketVersion,
StringComparison.OrdinalIgnoreCase) == 0)
{
version = header.Value;
break;
}
}
Debug.Assert(version != null, "'version' MUST NOT be NULL.");
return(version);
}
finally
{
if (webSocketHandle != null)
{
webSocketHandle.Dispose();
}
}
}
internal static void WebSocketCreateServerHandle(Interop.WebSocket.Property[] properties,
int propertyCount,
out SafeWebSocketHandle webSocketHandle)
{
Debug.Assert(propertyCount >= 0, "'propertyCount' MUST NOT be negative.");
Debug.Assert((properties == null && propertyCount == 0) ||
(properties != null && propertyCount == properties.Length),
"'propertyCount' MUST MATCH 'properties.Length'.");
if (s_webSocketDllHandle.IsInvalid)
{
WebSocketValidate.ThrowPlatformNotSupportedException_WSPC();
}
int errorCode = Interop.WebSocket.WebSocketCreateServerHandle(properties, (uint)propertyCount, out webSocketHandle);
ThrowOnError(errorCode);
if (webSocketHandle == null ||
webSocketHandle.IsInvalid)
{
WebSocketValidate.ThrowPlatformNotSupportedException_WSPC();
}
IntPtr responseHeadersPtr;
uint responseHeaderCount;
// Currently the WSPC doesn't allow to initiate a data session
// without also being involved in the http handshake
// There is no information whatsoever, which is needed by the
// WSPC for parsing WebSocket frames from the HTTP handshake
// In the managed implementation the HTTP header handling
// will be done using the managed HTTP stack and we will
// just fake an HTTP handshake for the WSPC calling
// WebSocketBeginServerHandshake and WebSocketEndServerHandshake
// with statically defined dummy headers.
errorCode = Interop.WebSocket.WebSocketBeginServerHandshake(webSocketHandle,
IntPtr.Zero,
IntPtr.Zero,
0,
s_ServerFakeRequestHeaders,
(uint)s_ServerFakeRequestHeaders.Length,
out responseHeadersPtr,
out responseHeaderCount);
ThrowOnError(errorCode);
Interop.WebSocket.HttpHeader[] responseHeaders = MarshalHttpHeaders(responseHeadersPtr, (int)responseHeaderCount);
errorCode = Interop.WebSocket.WebSocketEndServerHandshake(webSocketHandle);
ThrowOnError(errorCode);
Debug.Assert(webSocketHandle != null, "'webSocketHandle' MUST NOT be NULL at this point.");
}
public ServerWebSocket(Stream innerStream,
string subProtocol,
int receiveBufferSize,
TimeSpan keepAliveInterval,
ArraySegment <byte> internalBuffer)
: base(innerStream, subProtocol, keepAliveInterval,
WebSocketBuffer.CreateServerBuffer(internalBuffer, receiveBufferSize))
{
_properties = InternalBuffer.CreateProperties(false);
_sessionHandle = CreateWebSocketHandle();
if (_sessionHandle == null || _sessionHandle.IsInvalid)
{
WebSocketValidate.ThrowPlatformNotSupportedException_WSPC();
}
StartKeepAliveTimer();
}
internal static WebSocket Create(Stream innerStream,
string subProtocol,
int receiveBufferSize,
TimeSpan keepAliveInterval,
ArraySegment <byte> internalBuffer)
{
if (!WebSocketProtocolComponent.IsSupported)
{
WebSocketValidate.ThrowPlatformNotSupportedException_WSPC();
}
WebSocketValidate.ValidateInnerStream(innerStream);
WebSocketValidate.ValidateOptions(subProtocol, receiveBufferSize, WebSocketBuffer.MinSendBufferSize, keepAliveInterval);
WebSocketValidate.ValidateArraySegment <byte>(internalBuffer, nameof(internalBuffer));
WebSocketBuffer.Validate(internalBuffer.Count, receiveBufferSize, WebSocketBuffer.MinSendBufferSize, true);
return(new ServerWebSocket(innerStream,
subProtocol,
receiveBufferSize,
keepAliveInterval,
internalBuffer));
}
