server and client

出于工作的需要,今天写了一个服务程序,后来为了测试,还写了个客户端的程序.反正原理很简单,并且以后还可以套用.所以在这里存档.

server

-----------------------------------------------------

#include
#include
#include
#include
#include
#include
#include
#include
#include
#include

#define SERV_PORT  9970
#define LISTENQ  10
#define MAXDATASIZE 204800

int main(int argc, char **argv)
{
 int listenfd,client_fd;
 size_t sin_size;
 
 struct sockaddr_in  server_addr,client_addr;
 
 signal(SIGCHLD,SIG_IGN);
 
 if( (listenfd = socket(AF_INET,SOCK_STREAM,0)) == -1)
 {
   perror("socket create error!");
   exit(1);
 }
 
 server_addr.sin_family   = AF_INET;
 server_addr.sin_addr.s_addr  = htonl(INADDR_ANY);
 server_addr.sin_port   = htons(SERV_PORT);
 
 bzero(&(server_addr.sin_zero),8);
 
 if( bind(listenfd,(struct sockaddr *)&server_addr,sizeof(server_addr)) == -1)
 {
   perror("bind error!");
   exit(1);
 }
 
 if(listen(listenfd,LISTENQ) == -1)
 {
   perror("listen error!");
   exit(1);
 }
 
 while(1)
 {
  sin_size = sizeof(struct sockaddr_in );
   if (( client_fd = accept(listenfd, (struct sockaddr *)&client_addr, &sin_size)) == -1)
   {
       perror("accpt error");
       continue;
   }
  if (!fork())
    {
   char getBuf[MAXDATASIZE];
   char    *revBuf;
   int  recvbytes;
   memset(getBuf, 0, sizeof(getBuf));
   if ((recvbytes=recv(client_fd, getBuf, MAXDATASIZE, 0)) ==-1)
   {
    perror("recv出错！");
    exit(1);
   }
   getBuf[recvbytes] = '';
   printf("Received: %s",getBuf);
 
          revBuf=(char *)malloc(128);
            sprintf(revBuf,"hello,world! ");  
   int sendbytes = send(client_fd, revBuf, strlen(revBuf), 0);
   printf("sendbytes : %d ", sendbytes);
   printf("revBuf : %s ", revBuf);
   printf("close socket ");
   shutdown(client_fd, 2);
   close(client_fd);
   exit(0);
  }
 }
}

client

-------------------------------------------

import java.io.*;
import java.net.*;

public class Client
{
 public Client()
 {
  try
  {
   Socket socket = new Socket("127.0.0.1", 9970);
   BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
   PrintWriter out = new PrintWriter(socket.getOutputStream(),true);
   BufferedReader line = new BufferedReader(new InputStreamReader(System.in));
  
   out.println("12                                          CheckUser                                                                             PF|00040001|");
   System.out.println(in.readLine());
   line.close();
   out.close();
   in.close();
   socket.close();
  }
  catch (IOException e){}
 }
 
 public static void main(String[] args) {
  new Client();
 }
}

服务端在cgywin下编译通过,用c写的.

客户端用java写的,在windows xp下编译.

两个配合起来使用,天衣无缝.爽