/// <summary>
/// Reads the response from the socket
/// </summary>
/// <param name="socket"></param>
/// <returns></returns>
public unsafe bool Read(PooledSocket socket)
{
this.StatusCode = -1;
if (!socket.IsAlive)
{
return(false);
}
try
{
var header = new byte[BinaryResponse.HeaderLength];
socket.Receive(header, 0, header.Length);
this.DeserializeHeader(header, out var dataLength, out var extraLength);
if (dataLength > 0)
{
var data = new byte[dataLength];
socket.Receive(data, 0, dataLength);
this.Extra = new ArraySegment <byte>(data, 0, extraLength);
this.Data = new ArraySegment <byte>(data, extraLength, data.Length - extraLength);
}
return(this.StatusCode == 0);
}
catch (Exception ex)
{
this._logger.LogError(ex, "Read: Error occurred while reading socket");
throw;
}
}
public static GetResponse ReadItem(PooledSocket socket)
{
var description = TextSocketHelper.ReadResponse(socket);
if (String.Compare(description, "END", StringComparison.Ordinal) == 0)
{
return(null);
}
else if (description.Length < 6 || String.Compare(description, 0, "VALUE ", 0, 6, StringComparison.Ordinal) != 0)
{
throw new MemcachedClientException("No VALUE response received.\r\n" + description);
}
// response is:
// VALUE <key> <flags> <bytes> [<cas unique>]
// 0 1 2 3 4
//
// cas only exists in 1.2.4+
//
ulong cas = 0;
var parts = description.Split(' ');
if (parts.Length == 5)
{
if (!UInt64.TryParse(parts[4], out cas))
{
throw new MemcachedClientException("Invalid CAS VALUE received.");
}
}
else if (parts.Length < 4)
{
throw new MemcachedClientException("Invalid VALUE response received: " + description);
}
var flags = UInt16.Parse(parts[2], CultureInfo.InvariantCulture);
var length = Int32.Parse(parts[3], CultureInfo.InvariantCulture);
var allData = new byte[length];
var eod = new byte[2];
socket.Receive(allData, 0, length);
socket.Receive(eod, 0, 2); // data is terminated by \r\n
var result = new GetResponse(parts[1], flags, cas, allData);
GetHelper.Logger = GetHelper.Logger ?? Caching.Logger.CreateLogger(typeof(GetHelper));
if (GetHelper.Logger.IsEnabled(LogLevel.Debug))
{
GetHelper.Logger.LogDebug("Received value. Data type: {0}, size: {1}.", result.Item.Flags, result.Item.Data.Count);
}
return(result);
}
/// <summary>
/// Reads a line from the socket. A line is terninated by \r\n.
/// </summary>
/// <returns></returns>
static string ReadLine(PooledSocket socket)
{
using (var stream = new MemoryStream(50))
{
var gotR = false;
byte data;
while (true)
{
data = socket.Receive();
if (data == 13)
{
gotR = true;
continue;
}
if (gotR)
{
if (data == 10)
{
break;
}
stream.WriteByte(13);
gotR = false;
}
stream.WriteByte(data);
}
var result = Encoding.ASCII.GetString(stream.ToArray(), 0, (int)stream.Length);
Logger = Logger ?? Caching.Logger.CreateLogger(typeof(TextSocketHelper));
if (Logger.IsEnabled(LogLevel.Debug))
{
Logger.LogDebug("ReadLine: " + result);
}
return(result);
}
}
