FTP客户端源代码 python ftp客户端开发

由于需要和windows服务器连接，使用的是ftp通信协议，windows上使用filezilla作为服务器

关于filazilla参考前面记录的

 

会有linux开发板的ftp工具，但是实际上也是socket，所有使用socket就可以做到ftp文件传输，这样也可以根据实际情况比较好的控制，所以我 使用C实现了ftp的客户端程序。

 

以下是登陆代码代码

{
//初始化端口信息
struct sockaddr_in serv_addr;
char senddate,recvdate;
char sendline[MAXSIZE],recvline[MAXSIZE];
struct hostent *host;
 
//获取hostent中相关参数
char name[MAXSIZE],password[MAXSIZE];
printf("please enter the hostname\n");
printf("ftp->");
fflush(stdout);
//创建socket
if( (control_sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0){
printf("create socket error: %s(errno: %d)\n", strerror(errno),errno);
return -1 ;
//exit(0); 
}
memset(&serv_addr, 0, sizeof(serv_addr));
serv_addr.sin_family=AF_INET;
serv_addr.sin_port=htons(SERV_PORT);
serv_addr.sin_addr.s_addr=INADDR_ANY;
//点分十进制转化为二进制整数地址
if(inet_pton(AF_INET, FTP_CONNECT_IP, &serv_addr.sin_addr) <= 0){
printf("inet_pton error for %s\n", FTP_CONNECT_IP);
close(control_sockfd);
return -1 ;
//exit(0); 
}
//调用connect函数发起连接
if((connect(control_sockfd,(SA*)&serv_addr,sizeof(serv_addr)))<0)
{
printf("连接失败\n");
login_yes=0;
}
///printf("连接到 %d--->>>/n",&serv_addr.sin_addr);
recvdate=recv(control_sockfd,recvline,sizeof(recvline),0);
if(recvdate==-1)
{
printf("recvdate is connect error/n");
login_yes=0;
}
else if(strncmp(recvline,"220",3)==0)
{
printf("220 连接成功，请输入用户名\n");
login_yes=1;
}
else
{
printf("220 connect is error!");
login_yes=0;
}
 
//ftp用户登录主体部分
int sendbytes,recvbytes;
zeromery(name,1024);
zeromery(password,1024);
zeromery(recvline,1024);
zeromery(sendline,1024);
 
//printf("自动登录 用户名：windows-ftp\n") ;
strcat(sendline,"USER ");
strcat(sendline,"windows-ftp");
strcat(sendline,"\r\n");
printf("--->%s\n",sendline);
sendbytes=send(control_sockfd,sendline,strlen(sendline),0);
 
if(sendbytes==-1)
{
printf("send is wrong\n");
login_yes=0;
}
recvbytes=recv(control_sockfd,recvline,sizeof(recvline),0);
if(strncmp(recvline,"331",3)==0)
{
//printf("331 please specify the password./n");
printf("331 请输入密码\n");
}
else
{
printf("recv date is error./n");
login_yes=0;
}
zeromery(sendline,1024);
zeromery(recvline,1024);
sleep(1) ;
printf("密码：111111\n") ;
strcat(sendline,"PASS ");
strcat(sendline,"111111");
strcat(sendline,"\r\n");
printf("--->%s\n",sendline);
sendbytes=send(control_sockfd,sendline,strlen(sendline),0);
 
if(sendbytes==-1)
{
printf("pass send is error\n");
login_yes=0;
}
recvbytes=recv(control_sockfd,recvline,sizeof(recvline),0);
 
if(strncmp(recvline,"230",3)==0)
{
printf("登录成功!\n");
login_yes=1;
}
else
{
printf("pass recv is error\n");
login_yes=0;
}
 
if(login_yes==0)
{
close(control_sockfd); //登陆失败 关闭接口
return -1 ;
}
//进入到对应子路径
//////ftp_changdir("001",control_sockfd); //cd 
 
return control_sockfd;
}

 

实现了登陆，就意味着可以和service进行通信了，接下来的事情九四read  和 write  或者send和rev的事情。

 

 

 

 
static char First_login = 0 ;
//int main(int argc,char **argv)
//{
// printf("ftp>");
// char command[MAXSIZE];
// char*cmd;
// login();
// if(login_yes==1)
// {
// while(1)
// {
//comm: 
// sleep(1);
// printf("ftp>");
// zeromery(command,1024);
// scanf("%s",command);
// cmd=command;
// while(*(cmd)==' ')
// cmd++;
// if(strncmp(cmd,"pwd",3)==0)
// {
// ftp_pwd(control_sockfd);
// }
// if(strncmp(cmd,"mkdir",5)==0)
// {
// char path[60];
// zeromery(path,60);
// printf("创建的路径名: ");
// scanf("%s",path);
// printf("s\n",path);
// ftp_creat_mkd(path,control_sockfd);
// }
// if(strncmp(cmd,"back",4)==0)
// {
// ftp_back(control_sockfd);
// ftp_pwd(control_sockfd);
// }
// if(strncmp(cmd,"cd",2)==0)
// {
// int i;
// char path[60];
// zeromery(path,60);
// printf("要到的路径：");
// scanf("%s",path);
// printf("%s\n",path);
// ftp_changdir(path,control_sockfd);
// }
// if(strncmp(cmd,"get",3)==0)
// {
// ftp_pwd(control_sockfd); 
// ftp_download(control_sockfd);
// }
// if(strncmp(cmd,"up",3)==0)
// {
// ftp_pwd(control_sockfd);
// ftp_up(control_sockfd); 
// }
// if(strncmp(cmd,"quit",4)==0)
// {
// printf("bye^_^\n");
// close(control_sockfd);
// break;
// }
// ///printf("支持 list,pwd,mkdir,back,cd,up,get\n"); 
// }
//
// }
// else if(login_yes==0)
// { 
// int i;//不成功登录下最多还有两次机会，如果不能在两次登录，则，关闭链接。
// printf("Can not login vsftpd");
// for(i=2;i>0;i--)
// {
// printf("你还有 %d 登录机会\n",i); 
// login();
// if(login_yes==1)
// {
// goto comm;
// }
// }
// if(i==0)
// {
// printf("你不能在登录！\n");
// close(control_sockfd);
// }
//
// }
// else if (strncmp(cmd,"quit",4)==0)
// {
// ftp_quit(control_sockfd);
// close(control_sockfd);
//
// }
//
// return 0;
//}
int login()
{
//初始化端口信息
struct sockaddr_in serv_addr;
char senddate,recvdate;
char sendline[MAXSIZE],recvline[MAXSIZE];
struct hostent *host;
 
//获取hostent中相关参数
char name[MAXSIZE],password[MAXSIZE];
printf("please enter the hostname\n");
printf("ftp->");
fflush(stdout);
//创建socket
if( (control_sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0){
printf("create socket error: %s(errno: %d)\n", strerror(errno),errno);
return -1 ;
//exit(0); 
}
memset(&serv_addr, 0, sizeof(serv_addr));
serv_addr.sin_family=AF_INET;
serv_addr.sin_port=htons(SERV_PORT);
serv_addr.sin_addr.s_addr=INADDR_ANY;
//点分十进制转化为二进制整数地址
if(inet_pton(AF_INET, FTP_CONNECT_IP, &serv_addr.sin_addr) <= 0){
printf("inet_pton error for %s\n", FTP_CONNECT_IP);
close(control_sockfd);
return -1 ;
//exit(0); 
}
//调用connect函数发起连接
if((connect(control_sockfd,(SA*)&serv_addr,sizeof(serv_addr)))<0)
{
printf("连接失败\n");
login_yes=0;
}
///printf("连接到 %d--->>>/n",&serv_addr.sin_addr);
recvdate=recv(control_sockfd,recvline,sizeof(recvline),0);
if(recvdate==-1)
{
printf("recvdate is connect error/n");
login_yes=0;
}
else if(strncmp(recvline,"220",3)==0)
{
printf("220 连接成功，请输入用户名\n");
login_yes=1;
}
else
{
printf("220 connect is error!");
login_yes=0;
}
 
//ftp用户登录主体部分
int sendbytes,recvbytes;
zeromery(name,1024);
zeromery(password,1024);
zeromery(recvline,1024);
zeromery(sendline,1024);
 
//printf("自动登录 用户名：windows-ftp\n") ;
strcat(sendline,"USER ");
strcat(sendline,"windows-ftp");
strcat(sendline,"\r\n");
printf("--->%s\n",sendline);
sendbytes=send(control_sockfd,sendline,strlen(sendline),0);
 
if(sendbytes==-1)
{
printf("send is wrong\n");
login_yes=0;
}
recvbytes=recv(control_sockfd,recvline,sizeof(recvline),0);
if(strncmp(recvline,"331",3)==0)
{
//printf("331 please specify the password./n");
printf("331 请输入密码\n");
}
else
{
printf("recv date is error./n");
login_yes=0;
}
zeromery(sendline,1024);
zeromery(recvline,1024);
sleep(1) ;
printf("密码：111111\n") ;
strcat(sendline,"PASS ");
strcat(sendline,"111111");
strcat(sendline,"\r\n");
printf("--->%s\n",sendline);
sendbytes=send(control_sockfd,sendline,strlen(sendline),0);
 
if(sendbytes==-1)
{
printf("pass send is error\n");
login_yes=0;
}
recvbytes=recv(control_sockfd,recvline,sizeof(recvline),0);
 
if(strncmp(recvline,"230",3)==0)
{
printf("登录成功!\n");
login_yes=1;
}
else
{
printf("pass recv is error\n");
login_yes=0;
}
 
if(login_yes==0)
{
close(control_sockfd); //登陆失败 关闭接口
return -1 ;
}
//进入到对应子路径
//////ftp_changdir("001",control_sockfd); //cd 
 
return control_sockfd;
}
 
//数组初始化
void zeromery(char *a,int len)
{
int i;
len=sizeof(a);
for(i=0;i<len;i++)
{
a[i]=0;
}
}
 
//quit函数,control_sockfd,通过实参传递
void ftp_quit(int control_sockfd )
{
char sendline[1024];
char recvline[1024];
int recvbytes;
int sendbytes;
 
First_login = 0 ; //重新恢复到开始目录
 
zeromery(sendline,1024);
zeromery(recvline,1024);
strcat(sendline,"QUIT");
strcat(sendline,"\r\n");
sendbytes=send(control_sockfd,sendline,strlen(sendline),0);
if(sendbytes<0)
{
printf("quit send is error!\n");
goto END;
//exit(1);
}
recvbytes=recv(control_sockfd,recvline,strlen(recvline),0);
if(strncmp(recvline,"221",3)==0)
{
printf("221 bye!^_^");
goto END;
//exit(1);
}
else
{
printf("quit recv is error!\n");
goto END;
//exit(1);
}
END:
close(control_sockfd);
return ;
}
 
 
//mkd,在所在路径中创建目录 函数
void ftp_creat_mkd(char *path,int control_sockfd)
{
char sendline[1024];
char recvline[1024];
zeromery(sendline,1024);
zeromery(recvline,1024);
int recvbytes,sendbytes;
int issuccess;
strcat(sendline,"MKD ");
strcat(sendline,path);
strcat(sendline,"\r\n");
printf("%s\n",sendline);
sendbytes=send(control_sockfd,sendline,strlen(sendline),0);
if(sendbytes<0)
{
printf("mkd send is error!");
exit(1);
}
recvbytes=recv(control_sockfd,recvline,strlen(recvline),0);
if(strncmp(recvline,"257",3)==0)
{
issuccess=1;
}
else
{
issuccess=0;
}
}
 
 
//改变目录函数chdir
void ftp_changdir(char *dir,int control_sockfd)
{
 
char sendline[1024];
char recvline[1024];
int recvbytes,sendbytes;
zeromery(sendline,1024);
zeromery(recvline,1024);
strcat(sendline,"CWD ");
strcat(sendline,dir);
strcat(sendline,"\r\n");
printf("%s\n",sendline);
sendbytes=send(control_sockfd,sendline,strlen(sendline),0);
if(sendbytes<0)
{
printf("cwd send is error!\n");
}
recvbytes=recv(control_sockfd,recvline,sizeof(recvline),0);
if(recvbytes<0)
{
printf("cwd recv is error!\n");
}
if(strncmp(recvline,"250",3)==0)
{
char buf[55];
snprintf(buf,39,">>> %s\n",recvline);
printf("%s\n",buf);
}
else
{
printf("cwd chdir is error!\n");
return ;
//exit(1);
}
//登录成功
First_login = 1 ;
}
 
 
//pwd 命令函数
//在应答中返回当前工作目录，“pwd”+\r\n
void ftp_pwd(int control_sockfd)
{
int recvbytes,sendbytes;
char sendline[1024],recvline[1024];
zeromery(sendline,1024);
zeromery(recvline,1024);
strcat(sendline,"PWD");
strcat(sendline,"\r\n");
 
if(First_login==0)
{
//进入到对应子路径
//////ftp_changdir("001",control_sockfd); //cd 
}
 
sendbytes=send(control_sockfd,sendline,strlen(sendline),0);
if(sendbytes<0)
{
printf("pwd,send is error\n");
}
recvbytes=recv(control_sockfd,recvline,sizeof(recvline),0);
if(strncmp(recvline,"257",3)==0)
{
int i=0;
char *ptr;
char currendir[1024];
zeromery(currendir,1024);
ptr=recvline+5;
while(*(ptr)!='"')
{
currendir[i++]=*(ptr);
ptr++;
}
currendir[i]='\0';
printf("current directory is:%s\n",currendir);
 
}
else
{
printf("pwd,recv is error!\n");
}
}
//back 返回上一级函数，相当于cd /;
void ftp_back(int control_sockfd)
{
char sendline[1024],recvline[1024];
int recvbytes,sendbytes;
zeromery(sendline,1024);
zeromery(recvline,1024);
strcat(sendline,"CDUP");
strcat(sendline,"\r\n");
sendbytes=send(control_sockfd,sendline,strlen(sendline),0);
if(sendbytes<0)
{
printf("cdup send is error !\n");
}
recvbytes=recv(control_sockfd,recvline,sizeof(recvline),0);
if(recvbytes<0)
{
printf("cdup recv is error !\n");
}
if(strncmp(recvline,"250",3)==0)
{
printf("请求的文件操作已经成功\n");
}
}
 
//下载的实现函数
int ftp_download(int control_sockfd)
{
 
int pasv_or_port;// 定义the ftp协议的两种不同工作mode
int recvbytes,sendbytes;
char sendline[1024],recvline[1024];
struct sockaddr_in serv_addr;
FILE *fd;
int i,j;
int data_sockfd;
//type
zeromery(recvline,1024);
zeromery(sendline,1024);
strcat(sendline,"TYPE ");
strcat(sendline,"I");
strcat(sendline,"\r\n");
sendbytes=send(control_sockfd,sendline,strlen(sendline),0);
if(sendbytes<0)
{
printf(" type send is error!\n");
}
recvbytes=recv(control_sockfd,recvline,sizeof(recvline),0);
if(strncmp(recvline,"200",3)==0)
{
printf("使用二进制传输数据\n");
}
else
{
printf("type recv is error!\n");
}
 
if(npsupport==0)
{
//open the file
int size;
char localpathname[60];//预打开的文件路径字符串
int flags;
char pathname[60];
unsigned int mode;
//用户来选择pasv 或者是 port mode
char selectdata_mode_tran[1024];
zeromery(selectdata_mode_tran,1024);
zeromery(sendline,1024);
zeromery(recvline,1024);
pasv_or_port=0;//(默认是pasv模式)
//pasv mode
if(pasv_or_port==0)
{
strcat(sendline,"PASV");
strcat(sendline,"\r\n");
sendbytes=send(control_sockfd,sendline,strlen(sendline),0);
if(sendbytes<0)
{
printf("pasv send is error!\n");
}
zeromery(recvline,1024);
recvbytes=recv(control_sockfd,recvline,sizeof(recvline),0);
if(recvbytes<0)
{
printf("pasv recv is error!\n");
}
if(strncmp(recvline,"227",3)==0)
{
char buf[55];
snprintf(buf,51,">>> %s\n",recvline);
printf("%s\n",buf);
}
else
{
printf("pasv recv is error!\n");
}
//处理ftp server 端口
char *ptr1,*ptr2;
char num[1024];
zeromery(num,1024);
//取低位字节
ptr1=recvline+strlen(recvline);
while(*(ptr1)!=')')
{
ptr1--;
}
ptr2=ptr1;
while(*(ptr2)!=',')
ptr2--;
strncpy(num,ptr2+1,ptr1-ptr2-1);
i=atoi(num);//将字符串转换成整数
//取高位字节
zeromery(num,1024);
ptr1=ptr2;
ptr2--;
while(*(ptr2)!=',')
ptr2--;
strncpy(num,ptr2+1,ptr1-ptr2-1);
j=atoi(num);
//初始化服务器数据连接时的端口信息
int data_serviceport;
data_serviceport=j*256+i;
data_sockfd=socket(AF_INET,SOCK_STREAM,0);
 
serv_addr.sin_family=AF_INET;
serv_addr.sin_addr.s_addr=INADDR_ANY;
serv_addr.sin_port=htons(data_serviceport);
if(connect(data_sockfd,(struct sockaddr*)&serv_addr,sizeof(struct sockaddr))==-1)
{
printf("pasv data connect is error!\n");
}
printf("remote-file-pathname=");
scanf("%s",pathname);
printf("local-file-pathname=");
scanf("%s",localpathname);
printf("local:%s remore:%s\n",localpathname,pathname);
fd=fopen(localpathname,"w+");
if(fd==NULL)
{
printf("cannot open file\n");
exit(1);
}
 
 
//send the command retr;
zeromery(sendline,1024);
zeromery(recvline,1024);
strcat(sendline,"RETR ");
strcat(sendline,pathname);
strcat(sendline,"\r\n");
printf("%s\n",sendline);
sendbytes=send(control_sockfd,sendline,strlen(sendline),0);
if(sendbytes<0)
{
printf("retr send is error!\n");
}
recvbytes=recv(control_sockfd,recvline,sizeof(recvline),0);
if(recvbytes<0)
{
printf("retr recv is error!\n");
}
if(strncmp(recvline,"400",3)>0)
{
printf("return is error!\n");
}
}
 
//begin to transpotr data
sleep(1);
int flag=0;
char buffer[65536];
recvdata:
zeromery(buffer,1024);
recvbytes=recv(data_sockfd,buffer,sizeof(buffer),0);
if(recvbytes<0)
{
close(data_sockfd);
goto end;
}
fwrite(buffer,1,recvbytes,fd);
zeromery(recvline,1024);
recvbytes=recv(control_sockfd,recvline,sizeof(recvline),0);
if(flag==0)
{
if(strncmp(recvline,"226",3)!=0)
{
flag=1;
goto recvdata;
}
}
end:
if(flag!=1)
{
zeromery(recvline,1024);
shutdown(data_sockfd,SHUT_WR);
close(data_sockfd);
}
close(data_sockfd);
return 0;
}
}
 
 
//up 函数
int ftp_up(int control_sockfd, char* localpathname, char* pathname)
{
 
int pasv_or_port;// 定义the ftp协议的两种不同工作mode
int recvbytes,sendbytes;
char sendline[1024],recvline[1024];
struct sockaddr_in serv_addr;
FILE *fd;
int i,j;
int data_sockfd;
 
//type
zeromery(recvline,1024);
zeromery(sendline,1024);
strcat(sendline,"TYPE ");
strcat(sendline,"I");
strcat(sendline,"\r\n");
sendbytes=send(control_sockfd,sendline,strlen(sendline),0);
if(sendbytes<0)
{
printf(" type send is error!\n");
//发送失败 返回-2 启用重连
return -2 ;
}
recvbytes=recv(control_sockfd,recvline,sizeof(recvline),0);
if(strncmp(recvline,"200",3)==0)
{
printf("使用二进制传输数据\n");
}
else
{
printf("type recv is error!\n");
}
 
if(npsupport==0)
{
//open the file
int size;
//char localpathname[60];//预打开的文件路径字符串
int flags;
//char pathname[60];
unsigned int mode;
//用户来选择pasv 或者是 port mode
char selectdata_mode_tran[1024];
zeromery(selectdata_mode_tran,1024);
zeromery(sendline,1024);
zeromery(recvline,1024);
pasv_or_port=0;//(默认是pasv模式)
//pasv mode
if(pasv_or_port==0)
{
strcat(sendline,"PASV");
strcat(sendline,"\r\n");
sendbytes=send(control_sockfd,sendline,strlen(sendline),0);
if(sendbytes<0)
{
printf("pasv send is error!\n");
return -2 ; //////////////////////////临时增加
}
recvbytes=recv(control_sockfd,recvline,sizeof(recvline),0);
if(recvbytes<0)
{
printf("pasv recv is error!\n");
return -2 ; //////////////////////////临时增加
}
if(strncmp(recvline,"227",3)==0)
{
char buf[55];
snprintf(buf,51,">>> %s\n",recvline);
printf("%s\n",buf);
}
else
{
printf("pasv recv is error!\n");
return -2 ; //////////////////////////临时增加
}
//处理ftp server 端口
char *ptr1,*ptr2;
char num[1024];
zeromery(num,1024);
//取低位字节
ptr1=recvline+strlen(recvline);
while(*(ptr1)!=')')
{
ptr1--;
}
ptr2=ptr1;
while(*(ptr2)!=',')
ptr2--;
strncpy(num,ptr2+1,ptr1-ptr2-1);
i=atoi(num);//将字符串转换成整数
//取高位字节
zeromery(num,1024);
ptr1=ptr2;
ptr2--;
while(*(ptr2)!=',')
ptr2--;
strncpy(num,ptr2+1,ptr1-ptr2-1);
j=atoi(num);
//初始化服务器数据连接时的端口信息
int data_serviceport;
data_serviceport=j*256+i;
data_sockfd=socket(AF_INET,SOCK_STREAM,0);
 
serv_addr.sin_family=AF_INET;
serv_addr.sin_addr.s_addr=INADDR_ANY;
serv_addr.sin_port=htons(data_serviceport);
if(inet_pton(AF_INET, FTP_CONNECT_IP, &serv_addr.sin_addr) <= 0){
printf("inet_pton error for %s\n", FTP_CONNECT_IP);
exit(0);
}
 
 
if(connect(data_sockfd,(struct sockaddr*)&serv_addr,sizeof(struct sockaddr))==-1)
{
printf("pasv data connect is error!\n");
}
//printf("local-file-pathname=");
//scanf("%s",pathname);
//printf("remote-file-pathname=");
//scanf("%s",localpathname);
//printf("local:%s remore:%s\n",localpathname,pathname);
 
fd=fopen(pathname,"r");
if(fd==NULL)
{
printf("cannot open file,请重新输入！\n");
return -2 ;
}
 
//send the command retr;
zeromery(sendline,1024);
zeromery(recvline,1024);
strcat(sendline,"STOR ");
strcat(sendline,localpathname);
strcat(sendline,"\r\n");
printf("%s\n",sendline);
sendbytes=send(control_sockfd,sendline,strlen(sendline),0);
if(sendbytes<0)
{
printf("stor send is error!\n");
}
recvbytes=recv(control_sockfd,recvline,sizeof(recvline),0);
if(recvbytes<0)
{
printf("retr recv is error!\n");
}
if(strncmp(recvline,"150",3)==0)
{
char buf[55];
snprintf(buf,25,">>> %s\n",recvline);
printf("%s\n",buf);
}
}
 
while(!feof(fd))
{
char buffer[65536];
zeromery(buffer,sizeof(buffer));
int size;
size=fread(buffer,1,sizeof(buffer),fd);
if(ferror(fd))
{
printf("read file data is error!\n");
fclose(fd) ;
return -2 ;
}
else
{
zeromery(sendline,1024);
sendbytes=send(data_sockfd,buffer,size,0);
printf("传输了 %d 个字节\n",sendbytes);
//发送失败 返回-2 启用重连
if(sendbytes<0)
{
fclose(fd) ;
return -2 ;
}
}
close(data_sockfd);
recvbytes=recv(control_sockfd,recvline,sizeof(recvline),0);
if(strncmp(recvline,"226",3)==0)
{
printf("226 transfer complete");
break;
}
}
 
fclose(fd) ;
return 0;
}
}