internal static HttpResponse CreateWebSocketResponse()
{
var res = new HttpResponse(HttpStatusCode.SwitchingProtocols);
var headers = res.Headers;
headers["Upgrade"] = "websocket";
headers["Connection"] = "Upgrade";
return res;
}
internal static HttpResponse CreateUnauthorizedResponse(string challenge)
{
var res = new HttpResponse(HttpStatusCode.Unauthorized);
res.Headers["WWW-Authenticate"] = challenge;
return res;
}
internal static HttpResponse CreateCloseResponse(HttpStatusCode code)
{
var res = new HttpResponse(code);
res.Headers["Connection"] = "close";
return res;
}
// As client
private bool CheckHandshakeResponse(HttpResponse response, out string message)
{
message = null;
if (response.IsRedirect)
{
message = "Indicates the redirection.";
return false;
}
if (response.IsUnauthorized)
{
message = "Requires the authentication.";
return false;
}
if (!response.IsWebSocketResponse)
{
message = "Not a WebSocket handshake response.";
return false;
}
var headers = response.Headers;
if (!ValidateSecWebSocketAcceptHeader(headers["Sec-WebSocket-Accept"]))
{
message = "Includes no Sec-WebSocket-Accept header, or it has an invalid value.";
return false;
}
if (!ValidateSecWebSocketProtocolServerHeader(headers["Sec-WebSocket-Protocol"]))
{
message = "Includes no Sec-WebSocket-Protocol header, or it has an invalid value.";
return false;
}
if (!ValidateSecWebSocketExtensionsServerHeader(headers["Sec-WebSocket-Extensions"]))
{
message = "Includes an invalid Sec-WebSocket-Extensions header.";
return false;
}
if (!ValidateSecWebSocketVersionServerHeader(headers["Sec-WebSocket-Version"]))
{
message = "Includes an invalid Sec-WebSocket-Version header.";
return false;
}
return true;
}
// As server
internal void Close(HttpResponse response)
{
_readyState = WebSocketState.Closing;
SendHttpResponse(response);
ReleaseServerResources();
_readyState = WebSocketState.Closed;
}
// As server
private bool SendHttpResponse(HttpResponse response)
{
#if COMPAT
Log.DebugFormat("A response to this request:\n" + response);
#else
$"A response to the server:\n {response.Stringify()}".Debug();
#endif
return SendBytes(response.ToByteArray());
}
