aioserver 0.7.0

An async web framework for humans

Installation

pip install aioserver

Getting Started

Start a test server with the examples in the Usage section below:

make test

Make requests against the running test server:

curl -v localhost:8080
curl -v localhost:8080/found
curl -v localhost:8080/not-found
curl -v localhost:8080/server-error

Usage

Create Application

from aioserver import Application

app = Application()

Basic Routes

@app.get('/')
async def index(request):
    return {'message': 'Hello, world!'}

@app.get('/found')
async def found(request):
    return 302, {'Location': 'https://www.example.com/'}, {'message': 'Found'}

@app.get('/not-found')
async def not_found(request):
    return 404, {'message': 'Not Found'}

@app.get('/server-error')
async def server_error(request):
    return 500

CORS Headers

@app.cors('*')
@app.get('/cross-origin-resource-sharing')
async def cross_origin_resource_sharing(request):
    return {'message': 'Greetings from a different origin!'}

@app.cors('*', ['X-Custom-Header'])
@app.get('/cross-origin-header-sharing')
async def cross_origin_header_sharing(request):
    return 200, {'X-Custom-Header': 'share-this-header-too'}, {'message': 'Hello!'}

Session Cookie

from aioserver.middleware import hours

@app.get('/session-cookie')
@app.session(max_age=24 * hours)
async def session_cookie(request):
    print(f'session uuid {request.session}')
    return 200, {'message': 'Session UUID set as cookie for 24 hours.'}

Custom Middleware

Route-specific middleware:

@app.middleware
async def always_ok(request, handler):
    response = await handler(request)
    response.set_status(200, 'OK')
    return response

@always_ok
@app.get('/not-found-but-still-ok')
async def not_found_but_still_ok(request):
    return 404, {'message': 'Not found but still OK!'}

Global middleware:

async def strict_transport_security(request, handler):
    response = await handler(request)
    response.headers['Strict-Transport-Security'] = 'max-age=31536000'
    return response

app.use(strict_transport_security)

Run Application

app.run(host='127.0.0.1', port=8080)

Changelog

v0.2.0

• Decorator-based request handlers

v0.4.0

• Allow handler to specify HTTP response status
• Allow handler to specify additional HTTP headers

v0.5.0

• Serialize XML ElementTree as text/xml response

v0.6.0

• Decorator-based CORS

v0.6.2

• Fix project description

v0.7.0

• Route-specific middleware using decorators
• Global middleware using app.use(...)
• Refactor CORS headers as middleware
• Add session cookie as middleware