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
175
176
|
Metadata-Version: 2.4
Name: starlette
Version: 0.46.1
Summary: The little ASGI library that shines.
Project-URL: Homepage, https://github.com/encode/starlette
Project-URL: Documentation, https://www.starlette.io/
Project-URL: Changelog, https://www.starlette.io/release-notes/
Project-URL: Funding, https://github.com/sponsors/encode
Project-URL: Source, https://github.com/encode/starlette
Author-email: Tom Christie <tom@tomchristie.com>
License-Expression: BSD-3-Clause
License-File: LICENSE.md
Classifier: Development Status :: 3 - Alpha
Classifier: Environment :: Web Environment
Classifier: Framework :: AnyIO
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: BSD License
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python :: 3
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 :: 3.13
Classifier: Topic :: Internet :: WWW/HTTP
Requires-Python: >=3.9
Requires-Dist: anyio<5,>=3.6.2
Requires-Dist: typing-extensions>=3.10.0; python_version < '3.10'
Provides-Extra: full
Requires-Dist: httpx<0.29.0,>=0.27.0; extra == 'full'
Requires-Dist: itsdangerous; extra == 'full'
Requires-Dist: jinja2; extra == 'full'
Requires-Dist: python-multipart>=0.0.18; extra == 'full'
Requires-Dist: pyyaml; extra == 'full'
Description-Content-Type: text/markdown
<p align="center">
<picture>
<source media="(prefers-color-scheme: dark)" srcset="https://raw.githubusercontent.com/encode/starlette/master/docs/img/starlette_dark.svg" width="420px">
<source media="(prefers-color-scheme: light)" srcset="https://raw.githubusercontent.com/encode/starlette/master/docs/img/starlette.svg" width="420px">
<img alt="starlette-logo" src="https://raw.githubusercontent.com/encode/starlette/master/docs/img/starlette_dark.svg">
</picture>
</p>
<p align="center">
<em>✨ The little ASGI framework that shines. ✨</em>
</p>
---
[](https://github.com/encode/starlette/actions)
[](https://pypi.python.org/pypi/starlette)
[](https://pypi.org/project/starlette)
---
**Documentation**: <a href="https://www.starlette.io/" target="_blank">https://www.starlette.io</a>
**Source Code**: <a href="https://github.com/encode/starlette" target="_blank">https://github.com/encode/starlette</a>
---
# Starlette
Starlette is a lightweight [ASGI][asgi] framework/toolkit,
which is ideal for building async web services in Python.
It is production-ready, and gives you the following:
* A lightweight, low-complexity HTTP web framework.
* WebSocket support.
* In-process background tasks.
* Startup and shutdown events.
* Test client built on `httpx`.
* CORS, GZip, Static Files, Streaming responses.
* Session and Cookie support.
* 100% test coverage.
* 100% type annotated codebase.
* Few hard dependencies.
* Compatible with `asyncio` and `trio` backends.
* Great overall performance [against independent benchmarks][techempower].
## Installation
```shell
$ pip install starlette
```
You'll also want to install an ASGI server, such as [uvicorn](https://www.uvicorn.org/), [daphne](https://github.com/django/daphne/), or [hypercorn](https://hypercorn.readthedocs.io/en/latest/).
```shell
$ pip install uvicorn
```
## Example
```python title="main.py"
from starlette.applications import Starlette
from starlette.responses import JSONResponse
from starlette.routing import Route
async def homepage(request):
return JSONResponse({'hello': 'world'})
routes = [
Route("/", endpoint=homepage)
]
app = Starlette(debug=True, routes=routes)
```
Then run the application using Uvicorn:
```shell
$ uvicorn main:app
```
## Dependencies
Starlette only requires `anyio`, and the following are optional:
* [`httpx`][httpx] - Required if you want to use the `TestClient`.
* [`jinja2`][jinja2] - Required if you want to use `Jinja2Templates`.
* [`python-multipart`][python-multipart] - Required if you want to support form parsing, with `request.form()`.
* [`itsdangerous`][itsdangerous] - Required for `SessionMiddleware` support.
* [`pyyaml`][pyyaml] - Required for `SchemaGenerator` support.
You can install all of these with `pip install starlette[full]`.
## Framework or Toolkit
Starlette is designed to be used either as a complete framework, or as
an ASGI toolkit. You can use any of its components independently.
```python
from starlette.responses import PlainTextResponse
async def app(scope, receive, send):
assert scope['type'] == 'http'
response = PlainTextResponse('Hello, world!')
await response(scope, receive, send)
```
Run the `app` application in `example.py`:
```shell
$ uvicorn example:app
INFO: Started server process [11509]
INFO: Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```
Run uvicorn with `--reload` to enable auto-reloading on code changes.
## Modularity
The modularity that Starlette is designed on promotes building re-usable
components that can be shared between any ASGI framework. This should enable
an ecosystem of shared middleware and mountable applications.
The clean API separation also means it's easier to understand each component
in isolation.
---
<p align="center"><i>Starlette is <a href="https://github.com/encode/starlette/blob/master/LICENSE.md">BSD licensed</a> code.<br/>Designed & crafted with care.</i></br>— ⭐️ —</p>
[asgi]: https://asgi.readthedocs.io/en/latest/
[httpx]: https://www.python-httpx.org/
[jinja2]: https://jinja.palletsprojects.com/
[python-multipart]: https://multipart.fastapiexpert.com/
[itsdangerous]: https://itsdangerous.palletsprojects.com/
[sqlalchemy]: https://www.sqlalchemy.org
[pyyaml]: https://pyyaml.org/wiki/PyYAMLDocumentation
[techempower]: https://www.techempower.com/benchmarks/#hw=ph&test=fortune&l=zijzen-sf
|
