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debugtoolbar for aiohttp

Project description


|Build status| PyPI Chat on Gitter

aiohttp_debugtoolbar provides a debug toolbar for your aiohttp web application. Library is port of pyramid_debugtoolbar and still in early development stages. Basic functionality has been ported:

  • basic panels

  • intercept redirects

  • intercept and pretty print exception

  • interactive python console

  • show source code

Ported Panels

HeaderDebugPanel, PerformanceDebugPanel, TracebackPanel, SettingsDebugPanel, MiddlewaresDebugPanel, VersionDebugPanel, RoutesDebugPanel, RequestVarsDebugPanel, LoggingPanel

Help Needed

Are you coder looking for a project to contribute to python/asyncio libraries? This is the project for you!

Install and Configuration

$ pip install aiohttp_debugtoolbar

In order to plug in aiohttp_debugtoolbar, call aiohttp_debugtoolbar.setup on your app.

import aiohttp_debugtoolbar
app = web.Application(loop=loop)

Full Example

import asyncio
import jinja2
import aiohttp_debugtoolbar
import aiohttp_jinja2

from aiohttp import web

async def basic_handler(request):
    return {'title': 'example aiohttp_debugtoolbar!',
            'text': 'Hello aiohttp_debugtoolbar!',

async def exception_handler(request):
    raise NotImplementedError

async def init(loop):
    # add aiohttp_debugtoolbar middleware to you application
    app = web.Application(loop=loop)
    # install aiohttp_debugtoolbar

    template = """
            <title>{{ title }}</title>
            <h1>{{ text }}</h1>
              <a href="{{ app.router['exc_example'].url() }}">
              Exception example</a>
    # install jinja2 templates
    loader = jinja2.DictLoader({'index.html': template})
    aiohttp_jinja2.setup(app, loader=loader)

    # init routes for index page, and page with error
    app.router.add_route('GET', '/', basic_handler, name='index')
    app.router.add_route('GET', '/exc', exception_handler,
    return app

loop = asyncio.get_event_loop()
app = loop.run_until_complete(init(loop))
web.run_app(app, host='', port=9000)


aiohttp_debugtoolbar.setup(app, hosts=['', ])

Supported options

  • enabled: The debugtoolbar is disabled if False. By default is set to True.

  • intercept_redirects: If True, intercept redirect and display an intermediate page with a link to the redirect page. By default is set to True.

  • hosts: The list of allow hosts. By default is set to [‘’, ‘::1’].

  • exclude_prefixes: The list of forbidden hosts. By default is set to [].

  • check_host: If False, disable the host check and display debugtoolbar for any host. By default is set to True.

  • max_request_history: The max value for storing requests. By default is set to 100.

  • max_visible_requests: The max value of display requests. By default is set to 10.

  • path_prefix: The prefix of path to debugtoolbar. By default is set to ‘/_debugtoolbar’.


I’ve borrowed a lot of code from following projects. I highly recommend to check them out:

Play With Demo



0.6.1 (2023-11-19)

  • Filtered out requests to debugtoolbar itself from the requests history.

  • Improved import time by delaying loading of package data.

  • Fixed static URLs when using yarl 1.9+.

  • Fixed a warning in the re module.

  • Switched to aiohttp.web.AppKey for aiohttp 3.9.

  • Dropped Python 3.7 and added Python 3.11.

0.6.0 (2020-01-25)

  • Fixed ClassBasedView support. #207

  • Dropped aiohttp<3.3 support.

  • Dropped Python 3.4 support.

  • Dropped yield from and @asyncio.coroutine support.

0.5.0 (2018-02-14)

  • Added safe filter to render_content. #195

  • Added support for aiohtp 3.

0.4.1 (2017-08-30)

  • Fixed issue with redirects without location header. #174

0.4.0 (2017-05-04)

  • Added asyncio trove classifier.

  • Addes support for aiohttp 2.0.7+.

0.3.0 (2016-11-18)

  • Fixed middleware route finding when using sub-apps. #65

  • Added examples for extra panels: pgsql & redis monitor. #59

0.2.0 (2016-11-08)

  • Refactored test suite.

0.1.4 (2016-11-07)

  • Renamed to aiohttp-debugtoolbar.

  • Fixed imcompatibility with aiohttp 1.1.

0.1.3 (2016-10-27)

  • Fixed a link to request info page, sort request information alphabetically. #52

0.1.2 (2016-09-27)

  • Fixed empty functions names in performance panel. #43 (Thanks @kammala!)

  • Fixed flashing message during page rendering issue. #46

0.1.1 (2016-02-21)

  • Fixed a demo.

  • Added syntax highlight in traceback view, switched highlighter from highlight.js to prism.js. #31

0.1.0 (2016-02-13)

  • Added Python 3.5 support. (Thanks @stormandco!)

  • Added view source button in RoutesDebugPanel. (Thanks @stormandco!)

  • Dropped support for Python 3.3. (Thanks @sloria!)

  • Added middleware in setup method. (Thanks @sloria!)

  • Fixed bug with interactive console.

  • Fixed support for aiohttp>=0.21.1.

0.0.5 (2015-09-13)

  • Fixed IPv6 socket family error. (Thanks @stormandco!)

0.0.4 (2015-09-05)

  • Fixed support for aiohttp>=0.17. (Thanks @himikof!)

0.0.3 (2015-07-03)

  • Switched template engine from mako to jinja2. (Thanks @iho!)

  • Added custom yield from to track context switches inside coroutine.

  • Implemented panel for collecting request log messages.

  • Disable toolbar code injecting for non web.Response answers (StreamResponse or WebSocketResponse for example). #12

0.0.2 (2015-05-26)

  • Redesigned UI look-and-feel.

  • Renamed toolbar_middleware_factory to just middleware.

0.0.1 (2015-05-18)

  • Initial release.

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