套接字编程(四)-----多线程

基于多线程服务器的优缺点

优点：开销小
缺点：不稳定

服务器端：

#include
#include
#include
#include
#include
#include
#include
#include
void* handleRequest(void* arg)
{
    char buf[10240];
  int sock=(int)arg;
  while(1)
  {
    ssize_t s=read(sock,buf,sizeof(buf)-1);
    //success
    if(s>0)
    {
      buf[s]=0;
      printf("%s\n",buf);
      const char *msg= "HTTP/1.1 200 OK\r\n\r\n
This is title
\r\n";
      write(sock,msg,strlen(msg));
      break;
    }
    else if(s==0)   
    {
    printf("client is quit!\n");
    break;
    }
    else
    {
      perror("read");
      break;
    }
  }
  close(sock);
}
int startup(const char *_ip,int _port)
{
  //create socket
  int sock=socket(AF_INET,SOCK_STREAM,0);
  if(sock<0)
  {
   perror("socket");
   return 2;
  }
  int flag=1;
  setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,&flag,sizeof(flag));
  //bind
  struct sockaddr_in local;
  local.sin_family=AF_INET;
  local.sin_port=htons(_port);
  local.sin_addr.s_addr=inet_addr(_ip);
  if(bind(sock,(struct sockaddr*)&local,sizeof(local))<0)
  {
    perror("bind");
    return 3;
  }
  //listen
  if(listen(sock,10)<0)
  {
    perror("listen");
    return 4;
  }
  return sock;
}
static void usage(char *proc)
{
  printf("usage:%s [server_ip] [server_port]",proc);
}
int main(int argc, char *argv[])
{
    if(argc!=3)
    {
      usage(argv[0]);
      return 1;
    }
    int listen_sock=startup(argv[1],atoi(argv[2]));
    struct sockaddr_in peer;
    socklen_t len=sizeof(peer);
    while(1)
    {
      int new_sock=accept(listen_sock,(struct sockaddr*)&peer,&len); 
      if(new_sock<0)
      {
        perror("accept");
        continue;
      }
      printf("client ip:%s,port:%d\n",inet_ntoa(peer.sin_addr),ntohs(peer.sin_port));
      pthread_t id;
      pthread_create(&id,NULL,handleRequest,(void*)new_sock);
      pthread_detach(id);
    }
  return 0;
}