C ++ 03: Use boost-implement simple echo server with ASIO

C ++ 03: Use boost-implement simple echo server with ASIO

C ++ 03: Use boost-implement simple echo with ASIO Server  

I. WritingCode

Note: The following code is taken from the example code of boost 1.40:

/// Async_tcp_echo_server.cpp //~~~~~~~~~~~~~~~~~~~~~~~~~ //// Copyright (c) 2003-2008 Christopher M. kohlhoff (Chris at kohlhoff dot com) // distributed under the boost software license, Version 1.0. (See accompanying // file license_00000.txt or copy at http://www.boost.org/LICENSE_1_0.txt) // # include <cstdlib> # include <iostream> # include <boost/bind. HPP> # include <boost/ASIO. HPP> using boost: ASIO: IP: TCP; class session {public: Session (boost: ASIO: io_servi CE & io_service): Socket _ (io_service) {} TCP: Socket & socket () {return socket _;} void start () {socket _. async_read_some (boost: ASIO: buffer (Data _, max_length), boost: BIND (& session: handle_read, this, boost: ASIO: placeholders: error, boost: ASIO: placeholders: bytes_transferred);} void handle_read (const boost: System: error_code & error, size_t bytes_transferred) {If (! Error) {boost: ASIO: async_write (socket _, boost: ASIO: buffer (Data _, bytes_transferred), boost: BIND (& session: handle_write, this, boost: ASIO: placeholders: Error) ;}else {Delete this ;}} void handle_write (const boost: System: error_code & error) {If (! Error) {socket _. async_read_some (boost: ASIO: buffer (Data _, max_length), boost: BIND (& session: handle_read, this, boost: ASIO: placeholders: error, boost: ASIO: placeholders: bytes_transferred);} else {Delete this ;}} PRIVATE: TCP :: Socket socket _; Enum {max_length = 1024 }; char data _ [max_length] ;}; class server {public: Server (boost: ASIO: io_service & io_service, short port): io_service _ (io_se Rvice), acceptor _ (io_service, TCP: endpoint (TCP: V4 (), Port) {session * new_session = new session (io_service _); acceptor _. async_accept (new_session-> socket (), boost: BIND (& server: handle_accept, this, new_session, boost: ASIO: placeholders: Error ));} void handle_accept (Session * new_session, const boost: System: error_code & error) {If (! Error) {new_session-> Start (); new_session = new session (io_service _); acceptor _. async_accept (new_session-> socket (), boost: BIND (& server: handle_accept, this, new_session, boost: ASIO: placeholders: Error ));} else {Delete new_session;} PRIVATE: boost: ASIO: io_service & io_service _; TCP: acceptor _ ;}; int main (INT argc, char * argv []) {try {If (argc! = 2) {STD: cerr <"Usage: async_tcp_echo_server <port> \ n"; return 1;} boost: ASIO: io_service; using namespace STD; // For atoi. server s (io_service, atoi (argv [1]); io_service.run ();} catch (STD: exception & E) {STD: cerr <"exception: "<E. what () <"\ n";} return 0 ;}

Ii. Compile the code

 
$ G ++-G3-wall-o "async_tcp_echo_server" async_tcp_echo_server.cpp-lboost_system
 

Note: The boost. ASIO library depends on boost_system.

Iii. Running Async_tcp_echo_server

 
$./Async_tcp_echo_server 8868#8868 is the port number of async_tcp_echo_server listen
 

Iv. Use Telnet command as client Test

Start a new terminal,Note: log on to the Linux lab.Run Telnet localhost 8868.

$ Telnet localhost 8868 trying: 1... trying 127.0.0.1... connected to localhost. Escape Character is '^]'. The first line# This is our input.The first line# This is a serverAsync_tcp_echo_server response, And so onThe second linethe second linewelcome to xuanyuan-soft.org.cn! Welcome to xuanyuan-soft.org.cn!
 

5. More information about boost

Please visit boost home page: http://www.boost.org/