liunx下，文件的上传与下载?报错

@中山野鬼

你好，想跟你请教个问题 这个：

#include <arpa/inet.h>
#include <netdb.h>
#include <netinet/in.h>    // for sockaddr_in
#include <sys/types.h>    // for socket
#include <sys/socket.h>    // for socket
#include <stdio.h>        // for printf
#include <stdlib.h>        // for exit
#include <string.h>        // for bzero
#include <time.h>                //for time_t and time
 
#define LISTEN_QUEUE 20
#define SERVICE_PORT 1234

int service_sockfd;
int ret;
int sc;
static char buf[1024]="";
 FILE *stream;
int main(int argc,char *argv[])

{
  struct sockaddr_in service_addr;
	service_addr.sin_family =AF_INET;
	service_addr.sin_port =htons(SERVICE_PORT);
	service_addr.sin_addr.s_addr =htonl(INADDR_ANY);
	bzero(&(service_addr),sizeof(service_addr));
	
	service_sockfd =socket(AF_INET,SOCK_STREAM,0);
	if(-1 == service_sockfd)
	{
	 perror("sosck failed\n");
	 exit(-1);
	}

	if(bind(service_sockfd,(struct sockaddr*)&service_addr,sizeof(service_addr))==0)
	{
	 printf("bind failed。。。。。。。。。。。。。。。。\n");
	 exit(-1);
	}
	if( -1 ==listen(service_sockfd,10))
	{
	 printf("listen: %s\n",hstrerror(h_errno));
	 exit(-1);
	}
	printf("listening...................\n");
	while(1)
{
	
	 socklen_t leng = sizeof(service_addr);
	 struct sockaddr_in client_addr;
	 sc =accept(service_sockfd,(struct sockaddr*)&client_addr,&(leng));
	 if(-1 == sc)
	 {
	  printf("accept failed\n");
	  break;
	 }
	 else
	 {
	  printf("%s:%d\n",inet_ntoa(client_addr.sin_addr),client_addr.sin_port);
	 }
	
	 bzero(buf,1024);
	 strcpy(buf,"hello world 从服务器上来！！");
	 if(ret =send(sc,buf,strlen(buf)+1,0)==-1)
	 {
	   perror("send failed\n");
	   exit(-1);
	 }
	 printf("the service sending!!!\n");
	  ret =recv(sc,buf,1024,0);
	 if(-1 ==ret)
	 {
	  perror("recv failed\n");
		 	  exit(-1);
	 }
	 
	 printf("recv:[%d] - %s\n",ret,buf);
	
	if(fopen("file1","w+")==NULL)
	 {
	  printf("the file open error\n");
	 	  exit(-1);
	 }
	else
	{
		 printf("the file open successful\n");
	}
	 printf("Send %s\n",buf);
	 int lengsize = 0;
	 if(lengsize =fread(buf,1,1024,stream)>0)
	 {
	    printf("lengsize = %d\n",lengsize);
	    if(send(sc,buf,lengsize,0)<0)
	    {
			 printf("Send File is Failed\n");
			 break;
	    }
      bzero(buf, 1024);
	  }
 
   if(fclose(stream))
   {
   printf("The file 'data' was not closed! \n");
   exit(1);  
	 } 
	 close(sc);     
} 
	close(service_sockfd);
	return 0;
	
}

客户端：

#include <arpa/inet.h>
#include <netdb.h>
#include <netinet/in.h>    // for sockaddr_in
#include <sys/types.h>    // for socket
#include <sys/socket.h>    // for socket
#include <stdio.h>        // for printf
#include <stdlib.h>        // for exit
#include <string.h>        // for bzero
#include <time.h>                //for time_t and time


#define CLIENT_PORT 1234
#define MAX 1024


char *IP="127.0.0.1";
int client_socket;
int ret;
int my;
char buf[MAX]="hello 服务器";
FILE *stream;


int main()
{
  client_socket =socket(AF_INET,SOCK_STREAM,0);
  if(-1 == client_socket)
{
perror("sosck failed\n");
exit(-1);
}
struct sockaddr_in client_addr;
client_addr.sin_family =AF_INET;
client_addr.sin_port =htons(CLIENT_PORT);
client_addr.sin_addr.s_addr = inet_addr(IP);


ret =connect(client_socket, (struct sockaddr *)&client_addr, sizeof(struct sockaddr_in));
if(-1 == ret)
{
printf("connetct failed\n");
exit(-1);
}

while(1)
{
    strcat(buf,"发送请求");


 if(-1 == send(client_socket,buf,sizeof(buf)+1,0))
 {
   perror("send failed\n");
   exit(-1);
 }
ret =recv(client_socket,buf,1024,0);
 if(-1 ==ret)
  {
   perror("recv failed\n");
      exit(-1);
  }
  if(fopen("file2","w+") == NULL)
   {
    printf("the file open error\n");
   exit(-1);
   }
  else
  {
  printf("the file open successful\n");
 }
 printf("Send %s\n",buf);
   int lengsize = 0;
   if(lengsize=fwrite(buf,1,1024,stream) == -1)
   {
     printf("lengsize = %d\n",lengsize);
     if(send(client_socket,buf,lengsize,0)<0)
     {
  printf("Send File is Failed\n");
  break;
 } 
   }
 }
    bzero(buf, 1024);
    if(fclose(stream))
      {
       printf("The file 'data' was not closed! \n");
       exit(1);  
   } 
 
 close(client_socket);    
    return 0;  
}