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D3X/pyftpdlib

Extremely fast and scalable Python FTP server library

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Quick links

  • Home <https://github.com/giampaolo/pyftpdlib>__
  • Documentation <http://pyftpdlib.readthedocs.io>__
  • Download <https://pypi.python.org/pypi/pyftpdlib/>__
  • Blog <http://grodola.blogspot.com/search/label/pyftpdlib>__
  • Mailing list <http://groups.google.com/group/pyftpdlib/topics>__
  • What's new <https://github.com/giampaolo/pyftpdlib/blob/master/HISTORY.rst>__

About

Python FTP server library provides a high-level portable interface to easily
write very efficient, scalable and asynchronous FTP servers with Python. It is
the most complete RFC-959 <http://www.faqs.org/rfcs/rfc959.html>__ FTP server
implementation available for Python <http://www.python.org/>__ programming
language.

Features

  • Extremely lightweight, fast and scalable (see
    why <https://github.com/giampaolo/pyftpdlib/issues/203>__ and
    benchmarks <http://pyftpdlib.readthedocs.io/en/latest/benchmarks.html>__).
  • Uses sendfile(2) (see pysendfile <https://github.com/giampaolo/pysendfile>__)
    system call for uploads.
  • Uses epoll() / kqueue() / select() to handle concurrency asynchronously.
  • ...But can optionally skip to a
    multiple thread / process <http://pyftpdlib.readthedocs.io/en/latest/tutorial.html#changing-the-concurrency-model>__
    model (as in: you'll be free to block or use slow filesystems).
  • Portable: entirely written in pure Python; works with Python from 2.6 to
    3.5 by using a single code base.
  • Supports FTPS (RFC-4217 <http://tools.ietf.org/html/rfc4217>),
    IPv6 (RFC-2428 <ftp://ftp.rfc-editor.org/in-notes/rfc2428.txt>
    ),
    Unicode file names (RFC-2640 <http://tools.ietf.org/html/rfc2640>),
    MLSD/MLST commands (RFC-3659 <ftp://ftp.rfc-editor.org/in-notes/rfc3659.txt>
    ).
  • Support for virtual users and virtual filesystem.
  • Extremely flexible system of "authorizers" able to manage both "virtual" and
    "real" users on on both
    UNIX <http://pyftpdlib.readthedocs.io/en/latest/tutorial.html#unix-ftp-server>__
    and
    Windows <http://pyftpdlib.readthedocs.io/en/latest/tutorial.html#windows-ftp-server>__.
  • Test coverage <https://github.com/giampaolo/pyftpdlib/blob/master/pyftpdlib/test/>__
    close to 100%.

Performances

Despite being written in an interpreted language, pyftpdlib has transfer rates
comparable or superior to common UNIX FTP servers written in C. It usually tends
to scale better (see benchmarks <https://pyftpdlib.readthedocs.io/en/latest/benchmarks.html>)
because whereas vsftpd and proftpd use multiple processes to
achieve concurrency, pyftpdlib only uses one (see the C10K problem <http://www.kegel.com/c10k.html>
).

pyftpdlib vs. proftpd 1.3.4

+-----------------------------------------+----------------+----------------+-------------+
| benchmark type | pyftpdlib | proftpd | speedup |
+-----------------------------------------+----------------+----------------+-------------+
| STOR (client -> server) | 585.90 MB/sec | 600.49 MB/sec | -0.02x |
+-----------------------------------------+----------------+----------------+-------------+
| RETR (server -> client) | 1652.72 MB/sec | 1524.05 MB/sec | +0.08 |
+-----------------------------------------+----------------+----------------+-------------+
| 300 concurrent clients (connect, login) | 0.19 secs | 9.98 secs | +51x |
+-----------------------------------------+----------------+----------------+-------------+
| STOR (1 file with 300 idle clients) | 585.59 MB/sec | 518.55 MB/sec | +0.1x |
+-----------------------------------------+----------------+----------------+-------------+
| RETR (1 file with 300 idle clients) | 1497.58 MB/sec | 1478.19 MB/sec | 0x |
+-----------------------------------------+----------------+----------------+-------------+
| 300 concurrent clients (RETR 10M file) | 3.41 secs | 3.60 secs | +0.05x |
+-----------------------------------------+----------------+----------------+-------------+
| 300 concurrent clients (STOR 10M file) | 8.60 secs | 11.56 secs | +0.3x |
+-----------------------------------------+----------------+----------------+-------------+
| 300 concurrent clients (QUIT) | 0.03 secs | 0.39 secs | +12x |
+-----------------------------------------+----------------+----------------+-------------+

pyftpdlib vs. vsftpd 2.3.5

+-----------------------------------------+----------------+----------------+-------------+
| benchmark type | pyftpdlib | vsftpd | speedup |
+-----------------------------------------+----------------+----------------+-------------+
| STOR (client -> server) | 585.90 MB/sec | 611.73 MB/sec | -0.04x |
+-----------------------------------------+----------------+----------------+-------------+
| RETR (server -> client) | 1652.72 MB/sec | 1512.92 MB/sec | +0.09 |
+-----------------------------------------+----------------+----------------+-------------+
| 300 concurrent clients (connect, login) | 0.19 secs | 20.39 secs | +106x |
+-----------------------------------------+----------------+----------------+-------------+
| STOR (1 file with 300 idle clients) | 585.59 MB/sec | 610.23 MB/sec | -0.04x |
+-----------------------------------------+----------------+----------------+-------------+
| RETR (1 file with 300 idle clients) | 1497.58 MB/sec | 1493.01 MB/sec | 0x |
+-----------------------------------------+----------------+----------------+-------------+
| 300 concurrent clients (RETR 10M file) | 3.41 secs | 3.67 secs | +0.07x |
+-----------------------------------------+----------------+----------------+-------------+
| 300 concurrent clients (STOR 10M file) | 8.60 secs | 9.82 secs | +0.07x |
+-----------------------------------------+----------------+----------------+-------------+
| 300 concurrent clients (QUIT) | 0.03 secs | 0.01 secs | +0.14x |
+-----------------------------------------+----------------+----------------+-------------+

For more benchmarks see here <http://pyftpdlib.readthedocs.io/en/latest/benchmarks.html>__.

Quick start

.. code-block:: python

>>> from pyftpdlib.authorizers import DummyAuthorizer
>>> from pyftpdlib.handlers import FTPHandler
>>> from pyftpdlib.servers import FTPServer
>>>
>>> authorizer = DummyAuthorizer()
>>> authorizer.add_user("user", "12345", "/home/giampaolo", perm="elradfmwMT")
>>> authorizer.add_anonymous("/home/nobody")
>>>
>>> handler = FTPHandler
>>> handler.authorizer = authorizer
>>>
>>> server = FTPServer(("127.0.0.1", 21), handler)
>>> server.serve_forever()
[I 13-02-19 10:55:42] >>> starting FTP server on 127.0.0.1:21 <<<
[I 13-02-19 10:55:42] poller: <class 'pyftpdlib.ioloop.Epoll'>
[I 13-02-19 10:55:42] masquerade (NAT) address: None
[I 13-02-19 10:55:42] passive ports: None
[I 13-02-19 10:55:42] use sendfile(2): True
[I 13-02-19 10:55:45] 127.0.0.1:34178-[] FTP session opened (connect)
[I 13-02-19 10:55:48] 127.0.0.1:34178-[user] USER 'user' logged in.
[I 13-02-19 10:56:27] 127.0.0.1:34179-[user] RETR /home/giampaolo/.vimrc completed=1 bytes=1700 seconds=0.001
[I 13-02-19 10:56:39] 127.0.0.1:34179-[user] FTP session closed (disconnect).

other code samples <http://pyftpdlib.readthedocs.io/en/latest/tutorial.html>__

Donate

A lot of time and effort went into making pyftpdlib as it is right now.
If you feel pyftpdlib is useful to you or your business and want to support its
future development please consider donating <https://gmpy.dev/donate>__ me some money.

Languages

Python97.9%Makefile1.0%Batchfile0.6%PowerShell0.5%
MIT License
Created July 30, 2021
Updated July 30, 2021