Skip to main content
Help us improve Python packaging – donate today!

Flashbag (flash messages) support for aiohttp.web

Project Description

The library provides flashbag for aiohttp.web.

Usage

The library allows us to share some data between requests inside session.

Basic usage example:

import aiohttp_flashbag
from aiohttp import web
from aiohttp_session import setup as setup_session
from aiohttp_session import SimpleCookieStorage


async def handler_get(request):
    validation_error = aiohttp_flashbag.flashbag_get(request, 'error')

    error_html = ''

    if validation_error is not None:
        error_html = '<span>{validation_error}</span>'.format(
            validation_error=validation_error,
        )

    body = '''
        <html>
            <head><title>aiohttp_flashbag demo</title></head>
            <body>
                <form method="POST" action="/">
                    <input type="text" name="name" />
                    {error_html}
                    <input type="submit" value="Say hello">
                </form>
            </body>
        </html>
    '''
    body = body.format(error_html=error_html)

    return web.Response(body=body.encode('utf-8'), content_type='text/html')


async def handler_post(request):
    post = await request.post()

    if len(post['name']) == 0:
        aiohttp_flashbag.flashbag_set(request, 'error', 'Name is required')

        return web.HTTPSeeOther('/')

    body = 'Hello, {name}'.format(name=post['name'])

    return web.Response(body=body.encode('utf-8'), content_type='text/html')


def make_app():
    session_storage = SimpleCookieStorage()

    app = web.Application()

    setup_session(app, session_storage)

    app.middlewares.append(aiohttp_flashbag.flashbag_middleware)

    app.router.add_route(
        'GET',
        '/',
        handler_get,
    )

    app.router.add_route(
        'POST',
        '/',
        handler_post,
    )

    return app


web.run_app(make_app())

First of all, you have to register aiohttp_flashbag.flashbag_middleware in aiohttp.web.Application.

You can get some data from the previous request with aiohttp_flashbag.flashbag_get method. Parameters:

  • request. Instance of aiohttp.web_request.Request.
  • key. Name of “variable” that you want to get
  • default. The default value that should be returned, if the key doesn’t exist in session flashbag.

To set one “variable” in flashbag you should use aiohttp_flashbag.flashbag_set. Parameters:

  • request. Instance of aiohttp.web_request.Request.
  • key. Name of “variable” that you want to specify.
  • value. Data that you want to specify.

If you need to replace all “variables” in flashbag you should use aiohttp_flashbag.flashbag_replace_all. Parameters:

  • request. Instance of aiohttp.web_request.Request.
  • value. Dict with values that you want to add into flashbag.

Release history Release notifications

This version
History Node

0.0.2

History Node

0.0.1

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Filename, size & hash SHA256 hash help File type Python version Upload date
aiohttp_flashbag-0.0.2-py3-none-any.whl (5.2 kB) Copy SHA256 hash SHA256 Wheel py3 Nov 29, 2017
aiohttp-flashbag-0.0.2.tar.gz (3.4 kB) Copy SHA256 hash SHA256 Source None Nov 29, 2017

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging CloudAMQP CloudAMQP RabbitMQ AWS AWS Cloud computing Fastly Fastly CDN DigiCert DigiCert EV certificate StatusPage StatusPage Status page