套接字编程(四)-----多线程

来源：互联网发布：c语言绘图编辑：程序博客网时间：2024/04/30 01:36

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<stdio.h>#include<pthread.h>#include<stdlib.h>#include<sys/types.h>#include<sys/socket.h>#include<arpa/inet.h>#include<netinet/in.h>#include<string.h>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<html><h1>This is title</h1></html>\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;}

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