public static string GetVersion(WebSocketHttpRequest request)
{
string version;
if (request.Headers.TryGetValue("Sec-WebSocket-Version", out version))
{
return(version);
}
if (request.Headers.TryGetValue("Sec-WebSocket-Draft", out version))
{
return(version);
}
if (request.Headers.ContainsKey("Sec-WebSocket-Key1"))
{
return("76");
}
if ((request.Body != null) && request.Body.ToLower().Contains("policy-file-request"))
{
return("policy-file-request");
}
return("75");
}
public static WebSocketConnectionInfo Create(WebSocketHttpRequest request, string clientIp, int clientPort, string negotiatedSubprotocol)
{
var info = new WebSocketConnectionInfo
{
Origin = request["Origin"] ?? request["Sec-WebSocket-Origin"],
Host = request["Host"],
SubProtocol = request["Sec-WebSocket-Protocol"],
Path = request.Path,
ClientIpAddress = clientIp,
ClientPort = clientPort,
NegotiatedSubProtocol = negotiatedSubprotocol,
Headers = new Dictionary <string, string>(request.Headers, System.StringComparer.InvariantCultureIgnoreCase)
};
var cookieHeader = request["Cookie"];
if (cookieHeader != null)
{
var match = CookieRegex.Match(cookieHeader);
var fields = match.Groups["cookie_name"].Captures;
var values = match.Groups["cookie_value"].Captures;
for (var i = 0; i < fields.Count; i++)
{
var name = fields[i].ToString();
var value = values[i].ToString();
info.Cookies[name] = value;
}
}
return(info);
}
public static WebSocketHttpRequest Parse(byte[] bytes, string scheme)
{
// Check for websocket request header
var body = Encoding.UTF8.GetString(bytes);
Match match = _regex.Match(body);
if (!match.Success)
{
// No websocket request header found, check for a flash socket policy request
match = _FlashSocketPolicyRequestRegex.Match(body);
if (match.Success)
{
// It's a flash socket policy request, so return
return(new WebSocketHttpRequest
{
Body = body,
Bytes = bytes
});
}
else
{
return(null);
}
}
var request = new WebSocketHttpRequest
{
Method = match.Groups["method"].Value,
Path = match.Groups["path"].Value,
Body = match.Groups["body"].Value,
Bytes = bytes,
Scheme = scheme
};
var fields = match.Groups["field_name"].Captures;
var values = match.Groups["field_value"].Captures;
for (var i = 0; i < fields.Count; i++)
{
var name = fields[i].ToString();
var value = values[i].ToString();
request.Headers[name] = value;
}
return(request);
}
public static IHandler BuildHandler(WebSocketHttpRequest request, Action <string> onMessage, Action onClose, Action <byte[]> onBinary, Action <byte[]> onPing, Action <byte[]> onPong)
{
var version = GetVersion(request);
switch (version)
{
case "76":
return(Draft76Handler.Create(request, onMessage));
case "7":
case "8":
case "13":
return(Hybi13Handler.Create(request, onMessage, onClose, onBinary, onPing, onPong));
case "policy-file-request":
return(FlashSocketPolicyRequestHandler.Create(request));
}
throw new WebSocketException(WebSocketStatusCodes.UnsupportedDataType);
}