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Django - Tutorial 006. Customizing error pages 403, 404, 500

404, 500, Python, 403

Many resources are decorated error pages if there is a failure in processing a request from the client.
For a start has been made on the site customization of the most frequently occurring errors and other debugging until you come across, but still ahead.

As announced at the beginning of this article, was to customize the following error:

  1. 403 - Authorization error, access is denied.
  2. 404 - Page Not Found;
  3. 500 - Internal server error;

Customization error 404, 500

To customize the error 404 and 500 need to write a request handlers, and enough to write their ideas in the form of method.

The templates add your customized html file, that is:

  • error404.html
  • error500.html

The module that implements presentation for the site - home . The templates of the same module placed themselves customized templates errors.

Override the default handler in urls.py in the main module of site:

  • handler404
  • handler500

In the code, it looks like this:

from home.views import e_handler404, e_handler500

handler404 = e_handler404
handler500 = e_handler500

We describe the presentation in views.py home module file:

from django.shortcuts import render_to_response
from django.template import RequestContext


def e_handler404(request):
    context = RequestContext(request)
    response = render_to_response('error404.html', context)
    response.status_code = 404
    return response


def e_handler500(request):
    context = RequestContext(request)
    response = render_to_response('error500.html', context)
    response.status_code = 500
    return response

Customization Errors 403

Error 403 occurs when an authorized user is not trying to gain access to that part of the site to which access is restricted to authorized users.

In Django is reached by the test status of the user and adding to the pages of the protective token, CSRF mechanism. This error can occur and if the user is logged in, but performs actions that require CSRF token verification, and the token is lost or is not true. The fact is that for the correctness of the token, you need to add in the template in the form of a special tag:

{% csrf_token %}

It will be entered and the token, but just to add to the template, it is not enough. Before you start rendering the template, you must add a token to the context that will be passed to the template. I.e,

from django.template.context_processors import csrf
from django.shortcuts import render_to_response


def any_request(request):
    context = {}
    context.update(csrf(request))

    ...
    return render_to_response('any_request.html', context=context)

And now about customization. For csrf necessary that settings.py file added csrf module and indicated a view that will be engaged in the processing of this error:

MIDDLEWARE = [
    ...
    'django.middleware.csrf.CsrfViewMiddleware',
    ...
]

CSRF_FAILURE_VIEW = 'home.views.csrf_failure'

The templates add error403.html, and views.py file prescribe processor performance.

def csrf_failure(request, reason=""):
    context = RequestContext(request)
    response = render_to_response('error403.html', context)
    response.status_code = 403
    return response

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ГК
March 20, 2019, 9:01 a.m.
Геннадий Костоянский

C++ - Test 002. Constants

  • Result:0points,
  • Rating points-10
ГК
March 20, 2019, 8:46 a.m.
Геннадий Костоянский

C++ - Test 002. Constants

  • Result:25points,
  • Rating points-10
Last comments
MU
March 20, 2019, 3:43 p.m.
Maciej Urmański

It's possible to simply add vote option for non logged users?
March 20, 2019, 9:45 a.m.
Евгений Легоцкой

Добрый день. Поппробуйте домен localhost, а url соответственно http://localhost Возможно, потребуется указать порт. Например, так http://localhost:8000
March 19, 2019, 12:57 p.m.
AlexanderBardin

Добрый день. А проверить работоспособность локально как-то можно не указывая реальнй сайт (еще в разработке)
March 16, 2019, 1:55 p.m.
Дмитрий

Спасибо за статью. Давно итересует следующий вопрос: с помощью переменных QMAKE_TARGET_COMPANYQMAKE_TARGET_PRODUCTQMAKE_TARGET_DESCRIPTIONможно задать свойства компилируемой программы, о...
JS
March 12, 2019, 10:19 a.m.
Jean Stefanovich

Большое спасибо за разъяснения!
Now discuss on the forum
March 20, 2019, 12:26 p.m.
Евгений Легоцкой

Лучше стараться избегать этого. Нормального механизма нет. Я просто выдёргиваю из бэкенда перевёденные куски шаблона, если нужно что-то задействовать в JS.
March 17, 2019, 10:47 p.m.
Евгений Легоцкой

Добрый день. Вот, нашлось у меня немного времени. Делается это через шаблон проектирования наблюдатель. GraphKS_mfvSlup.zip
ЧГ
March 15, 2019, 9:52 p.m.
Чарльз Грин

спасибо, попробую, отпишусь
m
March 15, 2019, 7:41 p.m.
mihamuz

Сори догадался)
n
March 12, 2019, 4:57 p.m.
newbie.works.with.QT

Большооооое спасибо!!!!!Не передать как я вам благодарен, спасибо что всегда отзываетесь.Теперь я смогу продолжить работу в QT!!! (пробую писать бота (Я как вы могли догадаться немного не пр...
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