1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
Metadata-Version: 2.1
Name: websockets
Version: 10.3
Summary: An implementation of the WebSocket Protocol (RFC 6455 & 7692)
Home-page: https://github.com/aaugustin/websockets
Author: Aymeric Augustin
Author-email: aymeric.augustin@m4x.org
License: BSD
Project-URL: Changelog, https://websockets.readthedocs.io/en/stable/project/changelog.html
Project-URL: Documentation, https://websockets.readthedocs.io/
Project-URL: Funding, https://tidelift.com/subscription/pkg/pypi-websockets?utm_source=pypi-websockets&utm_medium=referral&utm_campaign=readme
Project-URL: Tracker, https://github.com/aaugustin/websockets/issues
Platform: UNKNOWN
Classifier: Development Status :: 5 - Production/Stable
Classifier: Environment :: Web Environment
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: BSD License
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.7
Classifier: Programming Language :: Python :: 3.8
Classifier: Programming Language :: Python :: 3.9
Classifier: Programming Language :: Python :: 3.10
Requires-Python: >=3.7
License-File: LICENSE
.. image:: logo/horizontal.svg
:width: 480px
:alt: websockets
|licence| |version| |pyversions| |wheel| |tests| |docs|
.. |licence| image:: https://img.shields.io/pypi/l/websockets.svg
:target: https://pypi.python.org/pypi/websockets
.. |version| image:: https://img.shields.io/pypi/v/websockets.svg
:target: https://pypi.python.org/pypi/websockets
.. |pyversions| image:: https://img.shields.io/pypi/pyversions/websockets.svg
:target: https://pypi.python.org/pypi/websockets
.. |wheel| image:: https://img.shields.io/pypi/wheel/websockets.svg
:target: https://pypi.python.org/pypi/websockets
.. |tests| image:: https://img.shields.io/github/checks-status/aaugustin/websockets/main
:target: https://github.com/aaugustin/websockets/actions/workflows/tests.yml
.. |docs| image:: https://img.shields.io/readthedocs/websockets.svg
:target: https://websockets.readthedocs.io/
What is ``websockets``?
-----------------------
websockets is a library for building WebSocket_ servers and clients in Python
with a focus on correctness, simplicity, robustness, and performance.
.. _WebSocket: https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API
Built on top of ``asyncio``, Python's standard asynchronous I/O framework, it
provides an elegant coroutine-based API.
`Documentation is available on Read the Docs. <https://websockets.readthedocs.io/>`_
Here's how a client sends and receives messages:
.. copy-pasted because GitHub doesn't support the include directive
.. code:: python
#!/usr/bin/env python
import asyncio
from websockets import connect
async def hello(uri):
async with connect(uri) as websocket:
await websocket.send("Hello world!")
await websocket.recv()
asyncio.run(hello("ws://localhost:8765"))
And here's an echo server:
.. code:: python
#!/usr/bin/env python
import asyncio
from websockets import serve
async def echo(websocket):
async for message in websocket:
await websocket.send(message)
async def main():
async with serve(echo, "localhost", 8765):
await asyncio.Future() # run forever
asyncio.run(main())
Does that look good?
`Get started with the tutorial! <https://websockets.readthedocs.io/en/stable/intro/index.html>`_
Why should I use ``websockets``?
--------------------------------
The development of ``websockets`` is shaped by four principles:
1. **Correctness**: ``websockets`` is heavily tested for compliance
with :rfc:`6455`. Continuous integration fails under 100% branch
coverage.
2. **Simplicity**: all you need to understand is ``msg = await ws.recv()`` and
``await ws.send(msg)``. ``websockets`` takes care of managing connections
so you can focus on your application.
3. **Robustness**: ``websockets`` is built for production. For example, it was
the only library to `handle backpressure correctly`_ before the issue
became widely known in the Python community.
4. **Performance**: memory usage is optimized and configurable. A C extension
accelerates expensive operations. It's pre-compiled for Linux, macOS and
Windows and packaged in the wheel format for each system and Python version.
Documentation is a first class concern in the project. Head over to `Read the
Docs`_ and see for yourself.
.. _Read the Docs: https://websockets.readthedocs.io/
.. _handle backpressure correctly: https://vorpus.org/blog/some-thoughts-on-asynchronous-api-design-in-a-post-asyncawait-world/#websocket-servers
Why shouldn't I use ``websockets``?
-----------------------------------
* If you prefer callbacks over coroutines: ``websockets`` was created to
provide the best coroutine-based API to manage WebSocket connections in
Python. Pick another library for a callback-based API.
* If you're looking for a mixed HTTP / WebSocket library: ``websockets`` aims
at being an excellent implementation of :rfc:`6455`: The WebSocket Protocol
and :rfc:`7692`: Compression Extensions for WebSocket. Its support for HTTP
is minimal — just enough for a HTTP health check.
If you want to do both in the same server, look at HTTP frameworks that
build on top of ``websockets`` to support WebSocket connections, like
Sanic_.
.. _Sanic: https://sanicframework.org/en/
What else?
----------
Bug reports, patches and suggestions are welcome!
To report a security vulnerability, please use the `Tidelift security
contact`_. Tidelift will coordinate the fix and disclosure.
.. _Tidelift security contact: https://tidelift.com/security
For anything else, please open an issue_ or send a `pull request`_.
.. _issue: https://github.com/aaugustin/websockets/issues/new
.. _pull request: https://github.com/aaugustin/websockets/compare/
Participants must uphold the `Contributor Covenant code of conduct`_.
.. _Contributor Covenant code of conduct: https://github.com/aaugustin/websockets/blob/main/CODE_OF_CONDUCT.md
``websockets`` is released under the `BSD license`_.
.. _BSD license: https://github.com/aaugustin/websockets/blob/main/LICENSE
|
