通过http代理连接到FTP服务器 [英] Connect to FTP server through http proxy

问题描述

我的代码belove给我错误:socket.gaierror: [Errno 11001] getaddrinfo failed调用方法ftp.connect()时.

My code belove gives me the error: socket.gaierror: [Errno 11001] getaddrinfo failed when calling the method ftp.connect().

我的问题是:为什么我可以连接到google.com，但是连接到ftp服务器时却出现错误?以及如何从http代理后面连接到ftp服务器?

My question is: why can I connect to google.com but when connecting to an ftp server it gives me error? And how I can connect to the ftp server from behind http proxy?

import ftplib
import urllib.request

# ftp settings
ftpusername = 'abc'
ftppassword = 'xyz'
ftp_host = 'host'
ftp_port = 1234

proxy_url = 'http://username:password@host:port'
proxy_support = urllib.request.ProxyHandler({'http': proxy_url})
opener = urllib.request.build_opener(proxy_support)
urllib.request.install_opener(opener)

#url works ok
f = urllib.request.urlopen('http://www.google.com/')
print(f.read(500))

# Connecting to ftp fails
with ftplib.FTP() as ftp:
    ftp.connect(host=ftp_host, ftp_port=port)
    ftp.login(user=ftpusername, passwd=ftppassword)
    print(ftp.getwelcome())
    print(ftp.nlst())
    ftp.close()
    ftp.quit()

推荐答案

您可以尝试将FTP网址直接发送到HTTP代理.

You may try to send the FTP url directly to the HTTP proxy.

 f = urllib.request.urlopen('ftp://abc:xyz@host/my-file.ext')

还要检查其他FTP客户端或浏览器是否成功使用FTP服务器. 如果是这样，请使用 Wireshark 之类的网络嗅探器，观察它们如何与FTP服务器通信.

Check also if other FTP clients or browsers succeed in iteracting with the FTP server. If they do, use a network sniffer like Wireshark and observe how they talk to the FTP server.

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