tcp_client_hello_world.cpp

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/*
 * Software License Agreement (BSD-3 License)
 *
 * Copyright (c) 2019 Rein Appeldoorn.
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 *   list of conditions and the following disclaimer.
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#include <async_comm/tcp_client.h>
 
#include <cstdint>
#include <cstring>
#include <iostream>
 
#include <chrono>
#include <thread>
#include <vector>
 
 
void callback(const uint8_t* buf, size_t len)
{
  for (size_t i = 0; i < len; i++)
  {
    std::cout << buf[i];
  }
}
 
 
int main()
{
  // open TCP connection
  async_comm::TCPClient tcp_client("localhost", 16140);
  tcp_client.register_receive_callback(&callback);
 
  if (!tcp_client.init())
  {
    std::cout << "Failed to initialize TCP client" << std::endl;
    return 1;
  }
 
  // send message one direction
  for (size_t i = 0; i < 10; ++i)
  {
    std::string msg = "hello world " + std::to_string(i) + "!";
    tcp_client.send_bytes((uint8_t*) msg.data(), msg.size());
    std::this_thread::sleep_for(std::chrono::milliseconds(500));
  }
 
  // close connection
  tcp_client.close();
 
  return 0;
}