并发Web服务器

 

#include<stdio.h>
#include<unistd.h>
#include<string.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<sys/types.h>
#include<fcntl.h>
#include<sys/stat.h>
#include<stdlib.h>
#include<pthread.h>
void *client_handler(void *arg)
{
 int fd,size;
 char temp[500]="";
 int client_fd = (int)arg;
 char buf[400]="",op_file[50]="";
 char head[]="HTTP/1.1 200 OK\r\n"\
    "Content-Type: text/html\r\n"\
    "\r\n";

 char err[]= "HTTP/1.1 404 Not Found\r\n" \
    "Content-Type: text/html\r\n" \
    "\r\n" \
    "File not found
";

 read(client_fd,buf,sizeof(buf));
 printf("buf==%s\n",buf);
 sscanf(buf,"GET /%s HTTP/1.1",op_file);
 printf("op_file==%s\n",op_file);
 fd=open(op_file,O_RDONLY);
 if(fd > 0)
 {
  printf("open sucess\n");
  write(client_fd,head,strlen(head));
  while((size=read(fd,temp,500)) > 0 )
   {
   write(client_fd,temp,size);
   bzero(temp,sizeof(temp));
   }
 }
 if(fd < 0)
 {
  printf("open failed\n");
  if( strcmp(op_file,"HTTP/1.1") || strcmp(op_file,"favicon.ico"))
  write(client_fd,err,strlen(err));
 }
 close(fd);
 close(client_fd);
 return NULL;
}
int main(void)
{
 int listen_fd,conn_fd;
 unsigned short port=6000;
 pthread_t tid;
 char ip[INET_ADDRSTRLEN]="";
 struct sockaddr_in server_addr,client_addr;
 socklen_t str_len = sizeof(client_addr);

 bzero(&server_addr,sizeof(struct sockaddr_in));
 bzero(&client_addr,sizeof(struct sockaddr_in));


 server_addr.sin_family = AF_INET;
 server_addr.sin_port = htons(port);
 server_addr.sin_addr.s_addr = htonl(INADDR_ANY);

 listen_fd = socket(AF_INET,SOCK_STREAM,0);

 if((bind(listen_fd,(struct sockaddr*)&server_addr,sizeof(struct sockaddr))) != 0)
 {
  perror("bind");
  exit(-1);
 }

 listen(listen_fd,10);

 while(1)
 {
 conn_fd = accept(listen_fd,(struct sockaddr*)&client_addr,&str_len);
 inet_ntop(AF_INET,&client_addr,ip,INET_ADDRSTRLEN);
 printf("Client ip:%s\n",ip);
 if(conn_fd < 0)
  {
  perror("accept");
  exit(-1);
  }
 pthread_create(&tid,NULL,client_handler,(void *)conn_fd);
 }
 close(listen_fd);
}