public override bool Handshake(IWebSocketSession session, WebSocketReceiveFilterBase previousFilter, out IReceiveFilter <IWebSocketFragment> dataFrameReader)
{
if (!VersionTag.Equals(session.SecWebSocketVersion) && NextProcessor != null)
{
return(NextProcessor.Handshake(session, previousFilter, out dataFrameReader));
}
dataFrameReader = null;
session.ProtocolProcessor = this;
if (!session.AppServer.ValidateHandshake(session, session.Items.GetValue <string>(OriginKey, string.Empty)))
{
return(false);
}
var secWebSocketKey = session.Items.GetValue <string>(WebSocketConstant.SecWebSocketKey, string.Empty);
if (string.IsNullOrEmpty(secWebSocketKey))
{
return(false);
}
var responseBuilder = new StringBuilder();
string secKeyAccept = string.Empty;
try
{
secKeyAccept = Convert.ToBase64String(SHA1.Create().ComputeHash(Encoding.ASCII.GetBytes(secWebSocketKey + m_Magic)));
}
catch (Exception)
{
return(false);
}
responseBuilder.AppendWithCrCf(WebSocketConstant.ResponseHeadLine10);
responseBuilder.AppendWithCrCf(WebSocketConstant.ResponseUpgradeLine);
responseBuilder.AppendWithCrCf(WebSocketConstant.ResponseConnectionLine);
responseBuilder.AppendFormatWithCrCf(WebSocketConstant.ResponseAcceptLine, secKeyAccept);
var subProtocol = session.GetAvailableSubProtocol(session.Items.GetValue <string>(WebSocketConstant.SecWebSocketProtocol, string.Empty));
if (!string.IsNullOrEmpty(subProtocol))
{
responseBuilder.AppendFormatWithCrCf(WebSocketConstant.ResponseProtocolLine, subProtocol);
}
responseBuilder.AppendWithCrCf();
byte[] data = Encoding.UTF8.GetBytes(responseBuilder.ToString());
session.SendRawData(data, 0, data.Length);
dataFrameReader = new WebSocketDataFrameReceiveFilter();
return(true);
}
public override bool Handshake(IWebSocketSession session, WebSocketReceiveFilterBase previousFilter, out IReceiveFilter <IWebSocketFragment> dataFrameReader)
{
var secKey1 = session.Items.GetValue <string>(WebSocketConstant.SecWebSocketKey1, string.Empty);
var secKey2 = session.Items.GetValue <string>(WebSocketConstant.SecWebSocketKey2, string.Empty);
dataFrameReader = null;
if (string.IsNullOrEmpty(secKey1) && string.IsNullOrEmpty(secKey2) && NextProcessor != null)
{
return(NextProcessor.Handshake(session, previousFilter, out dataFrameReader));
}
session.ProtocolProcessor = this;
if (!session.AppServer.ValidateHandshake(session, session.Items.GetValue <string>(WebSocketConstant.Origin, string.Empty)))
{
return(false);
}
var secKey3 = session.Items.GetValue <byte[]>(WebSocketConstant.SecWebSocketKey3, m_ZeroKeyBytes);
var responseBuilder = new StringBuilder();
responseBuilder.AppendWithCrCf(WebSocketConstant.ResponseHeadLine00);
responseBuilder.AppendWithCrCf(WebSocketConstant.ResponseUpgradeLine);
responseBuilder.AppendWithCrCf(WebSocketConstant.ResponseConnectionLine);
if (!string.IsNullOrEmpty(session.Origin))
{
responseBuilder.AppendFormatWithCrCf(WebSocketConstant.ResponseOriginLine, session.Origin);
}
responseBuilder.AppendFormatWithCrCf(WebSocketConstant.ResponseLocationLine, session.UriScheme, session.Host, session.Path);
var subProtocol = session.GetAvailableSubProtocol(session.Items.GetValue <string>(WebSocketConstant.SecWebSocketProtocol, string.Empty));
if (!string.IsNullOrEmpty(subProtocol))
{
responseBuilder.AppendFormatWithCrCf(WebSocketConstant.ResponseProtocolLine, subProtocol);
}
responseBuilder.AppendWithCrCf();
byte[] data = Encoding.UTF8.GetBytes(responseBuilder.ToString());
session.SendRawData(data, 0, data.Length);
//Encrypt message
byte[] secret = GetResponseSecurityKey(secKey1, secKey2, secKey3);
session.SendRawData(secret, 0, secret.Length);
dataFrameReader = new WebSocketDataReceiveFilter(previousFilter);
return(true);
}
/// <summary>
/// Initializes a new instance of the <see cref="WebSocketReceiveFilterBase" /> class.
/// </summary>
/// <param name="previousReceiveFilter">The previous receive filter.</param>
protected WebSocketReceiveFilterBase(WebSocketReceiveFilterBase previousReceiveFilter)
: base(previousReceiveFilter)
{
m_Session = previousReceiveFilter.Session;
}
public WebSocketSecKey3ReceiveFilter(WebSocketReceiveFilterBase prevFilter)
: base(prevFilter)
{
}
public WebSocketDataReceiveFilter(WebSocketReceiveFilterBase prevFilter)
: base(prevFilter)
{
}
public bool Handshake(IWebSocketSession session, WebSocketReceiveFilterBase previousReader, out IReceiveFilter <IWebSocketFragment> dataFrameReader)
{
dataFrameReader = null;
session.SendRawData(m_SwitchResponse, 0, m_SwitchResponse.Length);
return(true);
}
public abstract bool Handshake(IWebSocketSession session, WebSocketReceiveFilterBase previousFilter, out IReceiveFilter <IWebSocketFragment> dataFrameReader);
