118 lines
4.6 KiB
Plaintext
118 lines
4.6 KiB
Plaintext
|
Metadata-Version: 2.1
|
||
|
|
Name: trio-websocket
|
||
|
|
Version: 0.11.1
|
||
|
|
Summary: WebSocket library for Trio
|
||
|
|
Home-page: https://github.com/python-trio/trio-websocket
|
||
|
|
Author: Mark E. Haase
|
||
|
|
Author-email: mehaase@gmail.com
|
||
|
|
Project-URL: Bug Reports, https://github.com/python-trio/trio-websocket/issues
|
||
|
|
Project-URL: Source, https://github.com/python-trio/trio-websocket
|
||
|
|
Keywords: websocket client server trio
|
||
|
|
Classifier: Development Status :: 3 - Alpha
|
||
|
|
Classifier: Intended Audience :: Developers
|
||
|
|
Classifier: Topic :: Software Development :: Libraries
|
||
|
|
Classifier: License :: OSI Approved :: MIT License
|
||
|
|
Classifier: Programming Language :: Python :: 3.7
|
||
|
|
Classifier: Programming Language :: Python :: 3.8
|
||
|
|
Classifier: Programming Language :: Python :: 3.9
|
||
|
|
Classifier: Programming Language :: Python :: 3.10
|
||
|
|
Classifier: Programming Language :: Python :: 3.11
|
||
|
|
Classifier: Programming Language :: Python :: 3.12
|
||
|
|
Classifier: Programming Language :: Python :: Implementation :: CPython
|
||
|
|
Classifier: Programming Language :: Python :: Implementation :: PyPy
|
||
|
|
Requires-Python: >=3.7
|
||
|
|
Description-Content-Type: text/markdown
|
||
|
|
License-File: LICENSE
|
||
|
|
Requires-Dist: trio >=0.11
|
||
|
|
Requires-Dist: wsproto >=0.14
|
||
|
|
Requires-Dist: exceptiongroup ; python_version < "3.11"
|
||
|
|
|
||
|
|
# Trio WebSocket
|
||
|
|
|
||
|
|
This library implements both server and client aspects of the [the WebSocket
|
||
|
|
protocol](https://tools.ietf.org/html/rfc6455), striving for safety,
|
||
|
|
correctness, and ergonomics. It is based on the [wsproto
|
||
|
|
project](https://wsproto.readthedocs.io/en/latest/), which is a
|
||
|
|
[Sans-IO](https://sans-io.readthedocs.io/) state machine that implements the
|
||
|
|
majority of the WebSocket protocol, including framing, codecs, and events. This
|
||
|
|
library handles I/O using [the Trio
|
||
|
|
framework](https://trio.readthedocs.io/en/latest/). This library passes the
|
||
|
|
[Autobahn Test Suite](https://github.com/crossbario/autobahn-testsuite).
|
||
|
|
|
||
|
|
This README contains a brief introduction to the project. Full documentation [is
|
||
|
|
available here](https://trio-websocket.readthedocs.io).
|
||
|
|
|
||
|
|
[](https://pypi.org/project/trio-websocket/)
|
||
|
|
|
||
|
|
[](https://github.com/python-trio/trio-websocket/actions/workflows/ci.yml)
|
||
|
|
[](https://trio-websocket.readthedocs.io)
|
||
|
|
|
||
|
|
## Alternatives
|
||
|
|
|
||
|
|
If you happen to only need a server, using Quart via the [quart-trio](https://github.com/pgjones/quart-trio)
|
||
|
|
extension may suffice. While trio-websocket is more flexible, Quart covers
|
||
|
|
both HTTP and WebSocket within a single framework, and serving both from the
|
||
|
|
same port is straightforward. There has yet to be a performance comparison.
|
||
|
|
|
||
|
|
## Installation
|
||
|
|
|
||
|
|
This library requires Python 3.7 or greater. To install from PyPI:
|
||
|
|
|
||
|
|
pip install trio-websocket
|
||
|
|
|
||
|
|
## Client Example
|
||
|
|
|
||
|
|
This example demonstrates how to open a WebSocket URL:
|
||
|
|
|
||
|
|
```python
|
||
|
|
import trio
|
||
|
|
from sys import stderr
|
||
|
|
from trio_websocket import open_websocket_url
|
||
|
|
|
||
|
|
|
||
|
|
async def main():
|
||
|
|
try:
|
||
|
|
async with open_websocket_url('wss://echo.websocket.org') as ws:
|
||
|
|
await ws.send_message('hello world!')
|
||
|
|
message = await ws.get_message()
|
||
|
|
print('Received message: %s' % message)
|
||
|
|
except OSError as ose:
|
||
|
|
print('Connection attempt failed: %s' % ose, file=stderr)
|
||
|
|
|
||
|
|
trio.run(main)
|
||
|
|
```
|
||
|
|
|
||
|
|
The WebSocket context manager connects automatically before entering the block
|
||
|
|
and disconnects automatically before exiting the block. The full API offers a
|
||
|
|
lot of flexibility and additional options.
|
||
|
|
|
||
|
|
## Server Example
|
||
|
|
|
||
|
|
A WebSocket server requires a bind address, a port, and a coroutine to handle
|
||
|
|
incoming connections. This example demonstrates an "echo server" that replies to
|
||
|
|
each incoming message with an identical outgoing message.
|
||
|
|
|
||
|
|
```python
|
||
|
|
import trio
|
||
|
|
from trio_websocket import serve_websocket, ConnectionClosed
|
||
|
|
|
||
|
|
async def echo_server(request):
|
||
|
|
ws = await request.accept()
|
||
|
|
while True:
|
||
|
|
try:
|
||
|
|
message = await ws.get_message()
|
||
|
|
await ws.send_message(message)
|
||
|
|
except ConnectionClosed:
|
||
|
|
break
|
||
|
|
|
||
|
|
async def main():
|
||
|
|
await serve_websocket(echo_server, '127.0.0.1', 8000, ssl_context=None)
|
||
|
|
|
||
|
|
trio.run(main)
|
||
|
|
```
|
||
|
|
|
||
|
|
The server's handler ``echo_server(…)`` receives a connection request object.
|
||
|
|
This object can be used to inspect the client's request and modify the
|
||
|
|
handshake, then it can be exchanged for an actual WebSocket object ``ws``.
|
||
|
|
Again, the full API offers a lot of flexibility and additional options.
|