public WSHTTPConnectionParameters(Stream stream, WSHTTPClientHeaders clientHeaders, WSHTTPServerHeaders serverHeaders, WSHTTPConnectionType type)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream), $"{nameof(stream)} is null.");
}
if (clientHeaders == null)
{
throw new ArgumentNullException(nameof(clientHeaders), $"{nameof(clientHeaders)} is null.");
}
if (serverHeaders == null)
{
throw new ArgumentNullException(nameof(serverHeaders), $"{nameof(serverHeaders)} is null.");
}
var key = WSKey.FromString(clientHeaders.SecWebSocketKey);
ID = key.ID;
Type = type;
Stream = stream;
ClientHeaders = clientHeaders;
ServerHeaders = serverHeaders;
}
private async Task <IWSConnectionParameters> ClientHandshake(Stream stream, Uri uri)
{
var clientHeaders = CreateClientHeaders();
var serverHeaders = CreateServerHeaders();
var streamWriter = new StreamWriter(stream);
var streamReader = new StreamReader(stream);
var key = WSKey.FromID(ID);
clientHeaders["Host"] = uri.Host;
clientHeaders["Upgrade"] = "WebSocket";
clientHeaders["Connection"] = "Upgrade";
clientHeaders["Sec-WebSocket-Key"] = key.Text;
clientHeaders["Sec-WebSocket-Version"] = "13";
var clientDirective = new HTTPClientDirective {
Method = "GET",
Version = new Version(1, 1),
PathAndQuery = uri.PathAndQuery,
};
await SendResponse(clientHeaders, streamWriter, clientDirective);
var serverDirective = HTTPServerDirective.Parse(streamReader.ReadLine());
if (serverDirective.StatusCode != 101)
{
throw new NotSupportedException("Server Handshake Response");
}
await ReadHeaders(streamReader, serverHeaders);
return(new WSHTTPConnectionParameters(stream, clientHeaders, serverHeaders, WSHTTPConnectionType.Client));
}
private async Task <IWSConnectionParameters> ServerHandshake(Stream stream)
{
var clientHeaders = CreateClientHeaders();
var serverHeaders = CreateServerHeaders();
var streamWriter = new StreamWriter(stream);
var streamReader = new StreamReader(stream);
var clientDirective = HTTPClientDirective.Parse(streamReader.ReadLine());
if (clientDirective.Method != "GET" || clientDirective.PathAndQuery != "/ws")
{
throw new NotSupportedException("Client Handshake Request");
}
await ReadHeaders(streamReader, clientHeaders);
var key = WSKey.FromString(clientHeaders["Sec-WebSocket-Key"]);
ID = key.ID;
UpdateHeaders(clientHeaders, serverHeaders);
serverHeaders["Upgrade"] = "WebSocket";
serverHeaders["Connection"] = "Upgrade";
serverHeaders["Sec-WebSocket-Accept"] = key.ComputeAccept();
var serverDirective = new HTTPServerDirective {
Version = new Version(1, 1),
StatusText = "Switch Protocol WebSocket",
StatusCode = 101,
};
await SendResponse(serverHeaders, streamWriter, serverDirective);
return(new WSHTTPConnectionParameters(stream, clientHeaders, serverHeaders, WSHTTPConnectionType.Server));
}
public static string Checksum(WSKey key)
{
var bytes = UTF8.GetBytes(key.Text + WSConsts.KeySuffix);
return(Convert.ToBase64String(bytes));
}
