工作中用到了C/S模型，所做的也无非是给服务器发数据，但开发阶段会遇到程序自身的回环测试，需要用到简单的服务端以便验证数据发送的正确性。
写软件用C++，跑测试用python，这段时间也刚好看go语言，所以都要有demo。以下三组程序实现的功能相同，这里一起做下总结。
一、C++实现
Boost.Asio是一个跨平台的C++库，它用现代C++方法为网络和底层I/O程序提供了一致的异步I/O模型。 为了跨平台，我用boost库实现，具体如下。
服务端代码：
/*
File : svr.cpp
Author : Mike
E-Mail : Mike_Zhang@live.com
*/
#include <iostream>
#include <boost/asio.hpp>
using boost::asio::ip::tcp;
enum {max_length = 1024};
typedef boost::shared_ptr<tcp::socket> socket_ptr;
int main()
{
boost::asio::io_service io_service;
tcp::acceptor a(io_service, tcp::endpoint(tcp::v4(), atoi("12345")));
for (;;)
{
socket_ptr sock(new tcp::socket(io_service));
a.accept(*sock);
char data[max_length];
boost::system::error_code error;
size_t length = sock->read_some(boost::asio::buffer(data), error);
data[length] = 0;
std::cout<<data<<std::endl;
sock->close();
}
return 0;
}
</div>
客户端代码：
/*
File : cli.cpp
Author : Mike
E-Mail : Mike_Zhang@live.com
*/
#include <iostream>
#include <boost/asio.hpp>
using boost::asio::ip::tcp;
enum { max_length = 1024 };
int main(int argc, char* argv[])
{
boost::asio::io_service io_service;
tcp::resolver resolver(io_service);
tcp::resolver::query query(tcp::v4(), "127.0.0.1","12345");
tcp::resolver::iterator iterator = resolver.resolve(query);
tcp::socket s(io_service);
s.connect(*iterator);
std::cout << "Please input: ";
char request[max_length];
std::cin.getline(request, max_length);
size_t request_length = strlen(request);
boost::asio::write(s, boost::asio::buffer(request, request_length));
return 0;
}
</div>
编译：g++ cli.cpp -o cli -lboost_system -lboost_thread-mt
二、python实现
服务端代码：
'''
File : svr.py
Author : Mike
E-Mail : Mike_Zhang@live.com
'''
import socket,os
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.bind(('127.0.0.1', 12345))
sock.listen(5)
while True:
connection,address = sock.accept()
buf = connection.recv(1024)
print buf
connection.close()
</div>
客户端代码：
'''
File : cli.py
Author : Mike
E-Mail : Mike_Zhang@live.com
'''
import socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect(('127.0.0.1', 12345))
#sock.send('Test\n')
sock.send(raw_input("Please input : "))
sock.close()
</div>
三、go语言实现
服务端代码：
/*
File : svr.go
Author : Mike
E-Mail : Mike_Zhang@live.com
*/
package main
import(
"net"
"fmt"
"bufio"
)
func main() {
client,err := net.Listen("tcp","127.0.0.1:12345")
if err != nil {
fmt.Printf("Error : %s\n",err.String())
}
for {
if c, err := client.Accept(); err == nil {
defer c.Close()
line, _ := bufio.NewReader(c).ReadString('\n')
fmt.Println(line)
}
}
}
</div>
客户端代码：
/*
File : cli.go
Author : Mike
E-Mail : Mike_Zhang@live.com
*/
package main
import(
"net"
"fmt"
)
func main() {
conn, err := net.Dial("tcp", "127.0.0.1:12345")
if err != nil {
fmt.Printf("Error : %s\n",err.String())
}
conn.Write([]byte("Just a test"))
}
</div>
运行效果（go语言为例）：
