private async void HandleHTTPResponse()
{
// STEP 6: Read and parse the HTTP response
WriteLog.To.Sync.V(Tag, "WebSocket sent HTTP request...");
try {
using (var streamReader = new StreamReader(NetworkStream, Encoding.ASCII, false, 5, true)) {
var parser = new HttpMessageParser(await streamReader.ReadLineAsync().ConfigureAwait(false));
while (true)
{
var line = await streamReader.ReadLineAsync().ConfigureAwait(false);
if (String.IsNullOrEmpty(line))
{
break;
}
parser.Append(line);
}
ReceivedHttpResponse(parser);
}
} catch (Exception e) {
WriteLog.To.Sync.I(Tag, "Error reading HTTP response of websocket handshake", e);
DidClose(e);
}
}
private unsafe void ReceivedHttpResponse([NotNull] HttpMessageParser parser)
{
// STEP 7: Determine if the HTTP response was a success
_logic.ReceivedResponse(parser);
var httpStatus = _logic.HttpStatus;
if (_logic.ShouldRetry)
{
// Usually authentication needed, or a redirect
ResetConnections();
Start();
return;
}
var socket = _socket;
_c4Queue.DispatchAsync(() =>
{
var dict = parser.Headers?.ToDictionary(x => x.Key, x => (object)x.Value) ?? new Dictionary <string, object>();
Native.c4socket_gotHTTPResponse(socket, httpStatus, dict);
});
// Success is a 101 response, anything else is not good
if (_logic.Error != null)
{
DidClose(_logic.Error);
}
else if (httpStatus != 101)
{
var closeCode = C4WebSocketCloseCode.WebSocketClosePolicyError;
if (httpStatus >= 300 && httpStatus < 1000)
{
closeCode = (C4WebSocketCloseCode)httpStatus;
}
var reason = parser.Reason;
DidClose(closeCode, reason);
}
else if (!CheckHeader(parser, "Connection", "Upgrade", false))
{
DidClose(C4WebSocketCloseCode.WebSocketCloseProtocolError, "Invalid 'Connection' header");
}
else if (!CheckHeader(parser, "Upgrade", "websocket", false))
{
DidClose(C4WebSocketCloseCode.WebSocketCloseProtocolError, "Invalid 'Upgrade' header");
}
else if (!CheckHeader(parser, "Sec-WebSocket-Accept", _expectedAcceptHeader, true))
{
DidClose(C4WebSocketCloseCode.WebSocketCloseProtocolError, "Invalid 'Sec-WebSocket-Accept' header");
}
else
{
Connected();
}
}
private static bool CheckHeader([NotNull] HttpMessageParser parser, [NotNull] string key, string expectedValue, bool caseSens)
{
string value = null;
if (parser.Headers?.TryGetValue(key, out value) != true)
{
return(false);
}
var comparison = caseSens ? StringComparison.Ordinal : StringComparison.OrdinalIgnoreCase;
return(value?.Equals(expectedValue, comparison) == true);
}
private async void HandleHTTPResponse()
{
Log.To.Sync.V(Tag, "WebSocket sent HTTP request...");
using (var streamReader = new StreamReader(NetworkStream, Encoding.ASCII, false, 5, true)) {
var parser = new HttpMessageParser(await streamReader.ReadLineAsync().ConfigureAwait(false));
while (true)
{
var line = await streamReader.ReadLineAsync().ConfigureAwait(false);
if (String.IsNullOrEmpty(line))
{
break;
}
parser.Append(line);
}
ReceivedHttpResponse(parser);
}
}
