Python的FTP服務器開發包 pyftpdlib

Python FTP server library (pyftpdlib) 提供了高級的便攜式的編程接口，用來實現異步的FTP服務器的功能。基本上實現了 RFC-959 規范。它支持的特性包括：

• FTPS (FTP over TLS/SSL). New in 0.6.0
• Support for recent FTP commands such as MLSD, MLST, EPSV and EPRT (RFC-3659).
• Support for virtual users and virtual filesystem.
• FXP site-to-site transfers.
• IPv6 (RFC-2428) support.
• Bandwidth throttling.
• Per-user permissions configurability.
• Maximum and per-ip connection limits.
• Compact: main library is distributed as a single stand-alone module (ftpserver.py).
• High portability:
• Entirely written in pure Python, no third party modules are used. It works on any system where select( ) or poll( ) is available.
• Extremely flexible system of "authorizers" able to manage both "virtual" and "real" users on on both Windows and UNIX.
• Works with Python from 2.4 to 2.7.

示例代碼：

>>> from pyftpdlib import ftpserver
>>> authorizer = ftpserver.DummyAuthorizer()
>>> authorizer.add_user("user", "12345", "/home/user", perm="elradfmw")
>>> authorizer.add_anonymous("/home/nobody")
>>> handler = ftpserver.FTPHandler
>>> handler.authorizer = authorizer
>>> address = ("127.0.0.1", 21)
>>> ftpd = ftpserver.FTPServer(address, handler)
>>> ftpd.serve_forever()
Serving FTP on 127.0.0.1:21
[]127.0.0.1:2503 connected.
127.0.0.1:2503 ==> 220 Ready.
127.0.0.1:2503 <== USER anonymous
127.0.0.1:2503 ==> 331 Username ok, send password.
127.0.0.1:2503 <== PASS ******
127.0.0.1:2503 ==> 230 Login successful.
[anonymous]@127.0.0.1:2503 User anonymous logged in.
127.0.0.1:2503 <== TYPE A
127.0.0.1:2503 ==> 200 Type set to: ASCII.
127.0.0.1:2503 <== PASV
127.0.0.1:2503 ==> 227 Entering passive mode (127,0,0,1,9,201).
127.0.0.1:2503 <== LIST
127.0.0.1:2503 ==> 150 File status okay. About to open data connection.
[anonymous]@127.0.0.1:2503 OK LIST "/". Transfer starting.
127.0.0.1:2503 ==> 226 Transfer complete.
[anonymous]@127.0.0.1:2503 Transfer complete. 706 bytes transmitted.
127.0.0.1:2503 <== QUIT
127.0.0.1:2503 ==> 221 Goodbye.
[anonymous]@127.0.0.1:2503 Disconnected.

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