open_source / socket-cpp

  #include <iostream>
  #include <string>
  #include <thread>

  #include "socket-cpp/tcp_connector.h"
  #include "socket-cpp/version.h"

  
  using namespace std;
  
  // --------------------------------------------------------------------------
  // The read thread will run independently, retrieving packets from the
  // server and writing them to the console. When the main (write) thread
  // shuts down the socket, we exit.
  

  void read_thr(osdev::components::socket-cpp::tcp_socket rdSock)

  {
  	char buf[512];
  	ssize_t n;
  
  	while ((n = rdSock.read(buf, sizeof(buf))) > 0) {
  		cout.write(buf, n);
  		cout << endl;
  	}
  
  	if (n < 0) {
  		cout << "Read error [" << rdSock.last_error() << "]: " 
  			<< rdSock.last_error_str() << endl;
  	}
  	rdSock.shutdown();
  }
  
  // --------------------------------------------------------------------------
  
  int main(int argc, char* argv[])
  {
  	cout << "Sample multi-threaded TCP echo client for 'sockpp' "

  		<< osdev::components::socket-cpp::SOCKPP_VERSION << '\n' << endl;

  
  	string host = (argc > 1) ? argv[1] : "localhost";
  	in_port_t port = (argc > 2) ? atoi(argv[2]) : 12345;
  

  	osdev::components::socket-cpp::socket_initializer sockInit;

  
  	// Implicitly creates an inet_address from {host,port}
  	// and then tries the connection.
  

  	osdev::components::socket-cpp::tcp_connector conn({host, port});

  	if (!conn) {
  		cerr << "Error connecting to server at "

  			<< osdev::components::socket-cpp::inet_address(host, port)

  			<< "\n\t" << conn.last_error_str() << endl;
  		return 1;
  	}
  
  	cout << "Created a connection from " << conn.address() << endl;
  
  	// We create a read thread and send it a clone (dup) of the
  	// connector socket. 
  
  	std::thread rdThr(read_thr, std::move(conn.clone()));
  
  	// The write loop get user input and writes it to the socket.
  
  	string s, sret;
  	while (getline(cin, s) && !s.empty()) {
  		if (conn.write(s) != (int) s.length()) {
  			if (conn.last_error() == EPIPE) {
  				cerr << "It appears that the socket was closed." << endl;
  			}
  			else {
  				cerr << "Error writing to the TCP stream ["
  					<< conn.last_error() << "]: "
  					<< conn.last_error_str() << endl;
  			}
  			break;
  		}
  	}
  	int ret = !conn ? 1 : 0;
  
  	// Shutting down the socket will cause the read thread to exit.
  	// We wait for it to exit before we leave the app.
  
  	conn.shutdown(SHUT_WR);
  	rdThr.join();
  
  	return ret;
  }