使用ftplib时出错

Question

我正在尝试使用简单的python代码下载目录中存在的所有文件，我使用了ftplib，但我无法获得正确的结果。

from ftplib import FTP
import os
folder='D:\\New folder'
os.chdir(folder)
ftp = FTP('http://mtb.dobzhanskycenter.org/VCF/')
ftp.login()
vcffiles = ftp.nlst()
for files in vcffiles:
    local_filename = os.path.join('D:\\New folder', files)
    file = open(local_filename, 'wb')
    ftp.retrbinary('RETR '+ files, file.write)
    file.close()
ftp.quit()

Error:-

Traceback (most recent call last):
  File "D:/Python Class/url.py", line 5, in <module>
    ftp = FTP('http://mtb.dobzhanskycenter.org/VCF/')
  File "C:\Program Files\Python37\lib\ftplib.py", line 117, in __init__
    self.connect(host)
  File "C:\Program Files\Python37\lib\ftplib.py", line 152, in connect
    source_address=self.source_address)
  File "C:\Program Files\Python37\lib\socket.py", line 707, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
  File "C:\Program Files\Python37\lib\socket.py", line 748, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
  socket.gaierror: [Errno 11001] getaddrinfo failed

Answer 1

FTP constructor的第一个参数是host -一个主机名或IP地址-而不是一个URL (只允许HTTP URL -它是FTP客户端，而不是HTTP客户端)。

所以它应该是：

ftp = FTP('mtb.dobzhanskycenter.org')

如果要列出/VCF子文件夹中的文件，请执行以下操作：

ftp.cwd('VCF')      
vcffiles = ftp.nlst()

或

vcffiles = ftp.nlst('VCF')