public void DecompressTest()
{
var source = "hogefugapiyo";
byte[] destBytes;
using (var stream = new MemoryStream())
{
using (var deflate = new DeflateStream(stream, CompressionMode.Compress, true))
{
var sourceBytes = Encoding.UTF8.GetBytes(source);
deflate.Write(sourceBytes, 0, sourceBytes.Length);
}
destBytes = stream.ToArray();
}
var builder = new WebSocketFrameBuilder(ProxyConfig.MaxByteArrayLength);
var data = new byte[]
{
0b11000010,
0b00001110,
};
builder.TryAddData(data, 0, data.Length, out var readSize, out _).IsFalse();
readSize.Is(data.Length);
builder.TryAddData(destBytes, 0, destBytes.Length, out readSize, out var frame).IsTrue();
readSize.Is(destBytes.Length);
var ex = new PerMessageDeflateExtension();
var message = ex.Decompress(new WebSocketMessage(null, frame));
Encoding.UTF8.GetString(message.PayloadData).Is(source);
}
public IWebSocketClientExtension HandshakeExtension(WebSocketExtensionData extensionData)
{
if (!PerMessageDeflateExtension.Equals(extensionData.Name))
{
return(null);
}
bool succeed = true;
int clientWindowSize = MaxWindowSize;
int serverWindowSize = MaxWindowSize;
bool serverNoContext = false;
bool clientNoContext = false;
foreach (KeyValuePair <string, string> parameter in extensionData.Parameters)
{
if (ClientMaxWindow.Equals(parameter.Key, StringComparison.OrdinalIgnoreCase))
{
// allowed client_window_size_bits
if (this.allowClientWindowSize)
{
clientWindowSize = int.Parse(parameter.Value);
}
else
{
succeed = false;
}
}
else if (ServerMaxWindow.Equals(parameter.Key, StringComparison.OrdinalIgnoreCase))
{
// acknowledged server_window_size_bits
serverWindowSize = int.Parse(parameter.Value);
if (clientWindowSize > MaxWindowSize || clientWindowSize < MinWindowSize)
{
succeed = false;
}
}
else if (ClientNoContext.Equals(parameter.Key, StringComparison.OrdinalIgnoreCase))
{
// allowed client_no_context_takeover
if (this.allowClientNoContext)
{
clientNoContext = true;
}
else
{
succeed = false;
}
}
else if (ServerNoContext.Equals(parameter.Key, StringComparison.OrdinalIgnoreCase))
{
// acknowledged server_no_context_takeover
if (this.requestedServerNoContext)
{
serverNoContext = true;
}
else
{
succeed = false;
}
}
else
{
// unknown parameter
succeed = false;
}
if (!succeed)
{
break;
}
}
if ((this.requestedServerNoContext && !serverNoContext) ||
this.requestedServerWindowSize != serverWindowSize)
{
succeed = false;
}
if (succeed)
{
return(new WebSocketPermessageDeflateExtension(serverNoContext, serverWindowSize,
clientNoContext, this.compressionLevel));
}
else
{
return(null);
}
}
