|  |downloads| |stars| |forks| |contributors|
|  |version| |packages| |license|
|  |github-actions| |doc| |twitter|

.. |downloads| image:: https://img.shields.io/pypi/dm/pyftpdlib.svg
    :target: https://pepy.tech/project/pyftpdlib
    :alt: Downloads

.. |stars| image:: https://img.shields.io/github/stars/giampaolo/pyftpdlib.svg
    :target: https://github.com/giampaolo/pyftpdlib/stargazers
    :alt: Github stars

.. |forks| image:: https://img.shields.io/github/forks/giampaolo/pyftpdlib.svg
    :target: https://github.com/giampaolo/pyftpdlib/network/members
    :alt: Github forks

.. |contributors| image:: https://img.shields.io/github/contributors/giampaolo/pyftpdlib.svg
    :target: https://github.com/giampaolo/pyftpdlib/graphs/contributors
    :alt: Contributors

.. |github-actions| image:: https://img.shields.io/github/actions/workflow/status/giampaolo/pyftpdlib/.github/workflows/tests.yml
    :target: https://github.com/giampaolo/pyftpdlib/actions
    :alt: GH actions

.. |doc| image:: https://readthedocs.org/projects/pyftpdlib/badge/?version=latest
    :target: https://pyftpdlib.readthedocs.io/en/latest/
    :alt: Documentation Status

.. |version| image:: https://img.shields.io/pypi/v/pyftpdlib.svg?label=pypi
    :target: https://pypi.org/project/pyftpdlib
    :alt: Latest version

.. |py-versions| image:: https://img.shields.io/pypi/pyversions/psutil.svg
    :alt: Supported Python versions

.. |packages| image:: https://repology.org/badge/tiny-repos/python:pyftpdlib.svg
    :target: https://repology.org/metapackage/python:pyftpdlib/versions
    :alt: Binary packages

.. |license| image:: https://img.shields.io/pypi/l/pyftpdlib.svg
    :target: https://github.com/giampaolo/pyftpdlib/blob/master/LICENSE
    :alt: License

.. |twitter| image:: https://img.shields.io/twitter/follow/grodola.svg?label=follow&style=flat&logo=twitter&logoColor=4FADFF
    :target: https://twitter.com/grodola
    :alt: Twitter Follow

Quick links
===========

- `Home`_
- `Documentation`_
- `Download`_
- `Mailing list`_
- `What's new`_

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`_ FTP server implementation available for `Python`_
programming language.

Features
========

- Extremely **lightweight**, **fast** and **scalable** (see
  `why <https://github.com/giampaolo/pyftpdlib/issues/203>`__ and
  `benchmarks`_).
- Uses **sendfile(2)** (see `pysendfile <https://github.com/giampaolo/pysendfile>`__)
  system call for uploads (Linux only).
- Uses ``epoll()`` / ``kqueue()`` / ``select()`` to handle concurrency
  asynchronously.
- ...But can optionally skip to a `multiple thread / process`_ model (as in:
  you'll be free to block or use slow filesystems).
- Portable: entirely written in pure Python.
- Supports **FTPS** (`RFC-4217`_), **IPv6** (`RFC-2428`_), **Unicode** file
  names (`RFC-2640`_), **MLSD/MLST** commands (`RFC-3659`_).
- Support for virtual users and virtual filesystem.
- Flexible system of "authorizers" able to manage both "virtual" and
  "real" users on on both
  `UNIX <https://pyftpdlib.readthedocs.io/en/latest/tutorial.html#unix-ftp-server>`__
  and
  `Windows <https://pyftpdlib.readthedocs.io/en/latest/tutorial.html#windows-ftp-server>`__.

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`_) because whereas vsftpd and proftpd
use multiple processes to achieve concurrency, pyftpdlib only uses one (see
`the C10K problem`_).

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 <https://pyftpdlib.readthedocs.io/en/latest/benchmarks.html>`__.

Command line usage
==================

Start a FTP server, with an anonymous user with write permissions, on port 2121:

.. code-block:: sh

    $ python3 -m pyftpdlib --write
    RuntimeWarning: write permissions assigned to anonymous user.
      self._check_permissions(username, perm)
    [I 2024-06-23 13:49:35] concurrency model: async
    [I 2024-06-23 13:49:35] masquerade (NAT) address: None
    [I 2024-06-23 13:49:35] passive ports: None
    [I 2024-06-23 13:49:35] >>> starting FTP server on 0.0.0.0:2121, pid=763634 <<<

API usage
=========

.. 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).

For other code samples read the `tutorial <https://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`_ me some money.

.. _`benchmarks`: https://pyftpdlib.readthedocs.io/en/latest/benchmarks.html
.. _`Documentation`: https://pyftpdlib.readthedocs.io
.. _`donating`: https://gmpy.dev/donate
.. _`Download`: https://pypi.org/project/pyftpdlib/
.. _`Home`: https://github.com/giampaolo/pyftpdlib
.. _`Mailing list`: https://groups.google.com/group/pyftpdlib/topics
.. _`multiple thread / process`: https://pyftpdlib.readthedocs.io/en/latest/tutorial.html#changing-the-concurrency-model
.. _`Python`: https://www.python.org/
.. _`RFC-2428`: https://datatracker.ietf.org/doc/html/rfc2428
.. _`RFC-2640`: https://datatracker.ietf.org/doc/html/rfc2640
.. _`RFC-3659`: https://datatracker.ietf.org/doc/html/rfc3659
.. _`RFC-4217`: https://datatracker.ietf.org/doc/html/rfc4217
.. _`RFC-959`: https://datatracker.ietf.org/doc/html/rfc959.html
.. _`the C10K problem`: http://www.kegel.com/c10k.html
.. _`What's new`: https://github.com/giampaolo/pyftpdlib/blob/master/HISTORY.rst
