【C++|使用boost解析域名服务】下面的源码给出了使用boost::asio进行域名解析的方法.
//g++ -g resolver_demo.cpp -o resolver_demo -lboost_system -lpthread
//#include
#include
#include
#include using namespace std;
using namespace boost::asio;
void resolv_connect(io_service& ios, ip::tcp::socket& sock, const char* host, int port){
ip::tcp::resolver rslv(ios);
ip::tcp::resolver::query qry(host, boost::lexical_cast(port));
cout << "host_name: " << qry.host_name() << ", service_name: " << qry.service_name() << endl;
ip::tcp::resolver::iterator iter = rslv.resolve(qry);
ip::tcp::resolver::iterator end;
boost::system::error_code ec = error::host_not_found;
for( ;
ec&&iter!=end;
++iter){
sock.close();
sock.connect(*iter, ec);
}if(ec){
cout << "cannot connect" << endl;
throw boost::system::system_error(ec);
}
else if(iter != end){
ip::tcp::endpoint endpoint = iter->endpoint();
cout << "query success!" << endl;
cout << "host_ip: " << endpoint.address() << ", port: " << endpoint.port() << endl;
}
else
return;
}int main(){
try{
io_service ios;
ip::tcp::socket sock(ios);
resolv_connect(ios, sock, "news.sohu.com", 80);
}
catch(exception& e){
cerr << e.what() << endl;
return 1;
}return 0;
} 下面是运行截图
文章图片
