~Sockets~
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C++ Socket library tutorial
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Creating a socket that echoes input to screen
This Socket class only has one method (besides the constructor).
OnRead() is called by the SocketHandler when data is available in the
TcpSocket input buffer.
In this implementation, OnRead() will read a block of data from the input
buffer and print it to the console using printf().
DisplaySocket.h
#include <TcpSocket.h>
#include <ISocketHandler.h>
class DisplaySocket : public TcpSocket
{
public:
DisplaySocket(ISocketHandler& );
void OnRead();
};
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DisplaySocket.cpp
#include "DisplaySocket.h"
// the constant TCP_BUFSIZE_READ is the maximum size of the standard input
// buffer of TcpSocket
#define RSIZE TCP_BUFSIZE_READ
DisplaySocket::DisplaySocket(ISocketHandler& h) : TcpSocket(h)
{
}
void DisplaySocket::OnRead()
{
// OnRead of TcpSocket actually reads the data from the socket
// and moves it to the input buffer (ibuf)
TcpSocket::OnRead();
// get number of bytes in input buffer
size_t n = ibuf.GetLength();
if (n > 0)
{
char tmp[RSIZE]; // <--- tmp's here
ibuf.Read(tmp,n);
printf("Read %d bytes:\n",n);
for (size_t i = 0; i < n; i++)
{
printf("%c",isprint(tmp[i]) ? tmp[i] : '.');
}
printf("\n");
}
}
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