如何在Python中使用ftplib上传二进制文件？

Question

我的python2脚本很好地使用这种方法上传文件,但是python3提出了问题,而我仍然坚持下一步去哪里(谷歌搜索没有帮助).

from ftplib import FTP
ftp = FTP(ftp_host, ftp_user, ftp_pass)
ftp.storbinary('STOR myfile.txt', open('myfile.txt'))

我得到的错误是

Traceback (most recent call last):
  File "/Library/WebServer/CGI-Executables/rob3/functions/cli_f.py", line 12, in upload
    ftp.storlines('STOR myfile.txt', open('myfile.txt'))
  File "/Library/Frameworks/Python.framework/Versions/3.1/lib/python3.1/ftplib.py", line 454, in storbinary
    conn.sendall(buf)
TypeError: must be bytes or buffer, not str

我尝试将代码更改为

from ftplib import FTP
ftp = FTP(ftp_host, ftp_user, ftp_pass)
ftp.storbinary('STOR myfile.txt'.encode('utf-8'), open('myfile.txt'))

但相反,我得到了这个

Traceback (most recent call last):
  File "/Library/WebServer/CGI-Executables/rob3/functions/cli_f.py", line 12, in upload
    ftp.storbinary('STOR myfile.txt'.encode('utf-8'), open('myfile.txt'))
  File "/Library/Frameworks/Python.framework/Versions/3.1/lib/python3.1/ftplib.py", line 450, in storbinary
    conn = self.transfercmd(cmd)
  File "/Library/Frameworks/Python.framework/Versions/3.1/lib/python3.1/ftplib.py", line 358, in transfercmd
    return self.ntransfercmd(cmd, rest)[0]
  File "/Library/Frameworks/Python.framework/Versions/3.1/lib/python3.1/ftplib.py", line 329, in ntransfercmd
    resp = self.sendcmd(cmd)
  File "/Library/Frameworks/Python.framework/Versions/3.1/lib/python3.1/ftplib.py", line 244, in sendcmd
    self.putcmd(cmd)
  File "/Library/Frameworks/Python.framework/Versions/3.1/lib/python3.1/ftplib.py", line 179, in putcmd
    self.putline(line)
  File "/Library/Frameworks/Python.framework/Versions/3.1/lib/python3.1/ftplib.py", line 172, in putline
    line = line + CRLF
TypeError: can't concat bytes to str

任何人都可以指出我正确的方向

Answer 1

问题不在于命令参数,而在于文件对象.由于你要存储二进制文件,你需要打开带有'rb'标志的文件:

>>> ftp.storbinary('STOR myfile.txt', open('myfile.txt', 'rb'))
'226 File receive OK.'