public async Task <string[]> DirAsync(string path)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentException("invalid path", nameof(path));
}
var payload = path.ToNullTerminatedBytes();
var messageheader = new ClientMessageHeader(MessageTypes.Dir, ControlFlags.Default, payload);
return(await InternalDirAsync(payload, messageheader));
}
public async Task SendAsync(ClientMessageHeader header, byte[] payload, CancellationToken token = default)
{
if (!Connected)
{
throw new InvalidOperationException("Cannot send. No open connection!");
}
var buffer = header.ToByteArray();
await _stream.WriteAsync(buffer, 0, buffer.Length, token);
if (payload != null && payload.Length > 0)
{
await _stream.WriteAsync(payload, 0, payload.Length, token);
}
await _stream.FlushAsync(token);
}
private async Task <byte[]> InternalReadRawAsync(string path, uint datalen)
{
await _connection.ConnectAsync();
var payload = path.ToNullTerminatedBytes();
var messageheader = new ClientMessageHeader(MessageTypes.Read, ControlFlags.Default, payload, datalen);
await _connection.SendAsync(messageheader, payload);
var result = await _connection.ReceiveAsync();
await _connection.DisconnectAsync();
if (result.Payload != null && result.Payload.Length > 0)
{
var value = result.Payload.FromNullTerminatedBytes();
}
return(result.Payload);
}
private async Task <string[]> InternalDirAsync(byte[] payload, ClientMessageHeader messageheader)
{
await _connection.ConnectAsync();
await _connection.SendAsync(messageheader, payload);
var result = await _connection.ReceiveAsync();
await _connection.DisconnectAsync();
if (result.Payload != null && result.Payload.Length > 0)
{
var value = result.Payload.FromNullTerminatedBytes();
var folders = value.Split(',');
return(folders);
}
return(new string[0]);
}
private static ClientMessageHeader ParseClientMessage(Stream clientStream)
{
var streamReader = new StreamReader(clientStream);
{
clientStream.Position = 0;
var httpCmd = String.Empty;
for (var i = 0; i < 10; i++)
{
httpCmd = streamReader.ReadLine();
if (String.IsNullOrEmpty(httpCmd))
{
continue;
}
if (httpCmd.Count(c => c.Equals(' ')) >= 2)
{
break;
}
}
if (String.IsNullOrEmpty(httpCmd))
{
return null;
}
var splitBuffer = httpCmd.Split(new[] { ' ' }, 3);
var method = splitBuffer[0];
var remoteUri = splitBuffer[1];
if (method.Equals("CONNECT", StringComparison.InvariantCultureIgnoreCase))
{
remoteUri = "https://" + remoteUri;
}
var protocollVersion = splitBuffer[2];
splitBuffer = protocollVersion.Split(new[] { '/' }, 2);
var protocol = splitBuffer[0];
var version = splitBuffer[1];
var headers = new Dictionary<string, string>();
while (true)
{
var headerline = streamReader.ReadLine();
if (String.IsNullOrEmpty(headerline))
{
break;
}
var lineBuffer = headerline.Split(new[] { ':' }, 2);
var key = lineBuffer[0].Trim();
var value = lineBuffer[1].Trim();
headers.TryAdd(key, value);
}
if (remoteUri.StartsWith("/"))
{
remoteUri = string.Format("https://{0}{1}", headers["Host"], remoteUri);
}
var message = new ClientMessageHeader
{
Method = method,
RemoteUri = new Uri(remoteUri),
Protocol = protocol,
ProtocolVersion = Version.Parse(version),
Headers = headers
};
clientStream.Position = 0;
return message;
}
}
