我想要做一个网络server，一个网络client。

server主要就是一个echo回应，client连上服务器后打印服务器返回的回应。

Python做一个性能测试，调用50000次client去连接服务器。下面就是各自的代码。

Server：D语言开发。

Client：C/C++语言开发。

性能测试tool：Python语言开发。

Server Code: server.d -> server.exe

private import tango.core.Thread;

private import tango.io.Console;

private import tango.net.ServerSocket,

tango.net.SocketConduit;

void main()

{

const int port = 8080;

auto server = new ServerSocket (new InternetAddress(port));

while(true)

{

// wait for requests

auto request = server.accept;

// write a response

request.output.write ("server replies 'hello'");

}

}

Client Code(must link ws2_32.lib):client.cpp ->

client.exe

#include

#include

int client()

{

SOCKET sClient;

char szBuffer[1024];

sClient =

socket(AF_INET,SOCK_STREAM,IPPROTO_IP);

if (sClient == SOCKET_ERROR)

{

printf("socket() failed:

%d\n",WSAGetLastError());

return 1;

}

struct sockaddr_in server;

server.sin_family = AF_INET;

server.sin_port = htons(8080);

server.sin_addr.s_addr =

inet_addr("172.25.185.116");

struct hostent *host = NULL;

if(server.sin_addr.s_addr == INADDR_NONE)

{

host =

gethostbyname("172.25.185.116");

if(host == NULL)

printf("Unable

to resolve server:%s\n","172.25.185.116");

}

if(connect(sClient,(struct sockaddr

*)&server,sizeof(server)) == SOCKET_ERROR)

{

printf("connect()

failed:%d]n",WSAGetLastError());

return 1;

}

int ret = recv(sClient,szBuffer,1024,0);

szBuffer[ret] = '\0';

printf("RECV [%d

bytes]:'%s'\n",ret,szBuffer);

closesocket(sClient);

return 0;

}

int main(int argc,char* argv[])

{

WSADATA wsaData;

int retval=0;

if(WSAStartup(MAKEWORD(1,1),&wsaData)!=0)

{

return

255;

}

client();

WSACleanup();

return retval;

}

P Tool Code: test.py

import os

for i in range(50000):

os.spawnl(1,'client.exe')