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【C】 boost中asio的客户端代码示例

作者:谢中辉 / 发布于2011/9/18/ 888

#include #include #include #include #include g++ -o client asio_client.cpp -lboost_system -lboost_date_time -lboost_thread

#include <iostream>
#include <boost/ref.hpp>
#include <boost/asio.hpp>
#include <boost/bind.hpp>
#include <boost/function.hpp></div>
<div>using namespace boost::asio;</div>
<div>void client(io_service &ios)
 try {
 std::cout << "client starting." << std::endl;</div>
<div> ip::tcp::socket sock(ios);
 ip::tcp::endpoint ep(ip::address::from_string("127.0.0.1"), 6688);
 sock.connect(ep);</div>
<div> std::vector<char> str(100, 0);
 sock.read_some(buffer(str));
 std::cout << "receive from: " << sock.remote_endpoint().address() << std::endl;
 std::cout << &str[0] << std::endl;
 } catch (std::exception &e) {
 std::cout << e.what() << std::endl;
 }
<div>class a_timer
{
 private:
 int count, count_max;
 boost::function<void()> f;
 boost::asio::deadline_timer t;</div>
<div> public:
 template<typename F>
 a_timer(io_service &ios, int x, F func): f(func), count_max(x), count(0),
 t(ios, boost::posix_time::millisec(500)) {
 t.async_wait(boost::bind(&a_timer::call_func, this, boost::asio::placeholders::error)); 
 }
<div> void call_func(const boost::system::error_code&)
 {
 if (count >= count_max) {
 return;
 }
<div> ++count;
 f();
 t.expires_at(t.expires_at() + boost::posix_time::millisec(500));
 t.async_wait(boost::bind(&a_timer::call_func, this, boost::asio::placeholders::error));
 }
<div>};</div>
<div>int main()
{
 io_service ios;
 a_timer at(ios, 5, boost::bind(client, boost::ref(ios)));</div>
<div> ios.run();
}

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