public virtual TConnection Generate(Tcp.Connection connection, URL url, params string[] reqSubprotocols)
{
ClientConnection httpClient = new ClientConnection(connection);
OutgoingRequest req = httpClient.Enqueue("HTTP/1.1", "GET", url);
TConnection newConnection = GenerateConnection(connection, req.Head);
string reqExtensions = NegotiatingExtension.Stringify(RequestExtensions());
string key = Secret.GenerateKey();
req["Connection"] = "Upgrade";
req["Upgrade"] = "websocket";
req["Sec-WebSocket-Version"] = "13";
req["Sec-WebSocket-Key"] = key;
if (reqSubprotocols.Length > 0)
{
req["Sec-WebSocket-Protocol"] = SubprotocolNegotiation.Stringify(reqSubprotocols);
}
if (reqExtensions.Length > 0)
{
req["Sec-WebSocket-Extensions"] = reqExtensions;
}
req.OnResponse += (res) =>
{
if (!VerifyResponseHead(res, key))
{
httpClient.Terminate(); return;
}
string subprotocol = res["Sec-WebSocket-Protocol"];
if (subprotocol != null)
{
bool validSubprotocol = false;
for (int i = 0; i < reqSubprotocols.Length; i++)
{
if (reqSubprotocols[i] == subprotocol)
{
validSubprotocol = true; break;
}
}
if (!validSubprotocol)
{
httpClient.Terminate(); return;
}
}
newConnection.SetSubprotocol(subprotocol);
if (
!NegotiatingExtension.TryParse(res["Sec-WebSocket-Extensions"] ?? "", out NegotiatingExtension[] resExtensions) ||
!CheckExtensions(resExtensions)
)
{
httpClient.Terminate(); return;
}
byte[] trail = httpClient.Freeze();
if (!httpClient.End())
{
return;
}
newConnection.Initiate(trail);
};
public static bool TryParse(string s, out NegotiatingExtension[] result)
{
result = null;
if (s == "")
{
result = new NegotiatingExtension[0]; return(true);
}
List <NegotiatingExtension> parsed = new List <NegotiatingExtension>();
string[] spl = s.Split(",");
for (int i = 0; i < spl.Length; i++)
{
string ext = spl[i].Trim();
if (ext.Length == 0)
{
return(false);
}
string[] spl2 = ext.Split(";");
NegotiatingExtension current = new NegotiatingExtension();
if ((current.ExtensionName = spl2[0].Trim()).Length == 0)
{
return(false);
}
for (int j = 1; j < spl2.Length; j++)
{
string[] spl3 = spl2[j].Split("=");
if (spl3.Length > 2)
{
return(false);
}
current.Parameters.Add(spl3[0].Trim(), spl3.Length == 2 ? spl3[1].Trim() : "");
}
parsed.Add(current);
}
result = parsed.ToArray();
return(true);
}
