Django Bad Request(400) Error in Deployment with Apache/NginX

Question

I'm trying to lunch my app on VPS in Debug=False mode. Debug=True works fine but when I change it to false I got this error. I'm using Apache for rendering python pages and Nginx to serve my static files. I tried using this [answer]: Debugging Apache/Django/WSGI Bad Request (400) Error but it's not working at least for me. And this is my wsgi config:

#wsgi.py
import os
import sys

os.environ['DJANGO_SETTINGS_MODULE'] = 'example.settings'
import django.core.handlers.wsgi
application = django.core.handlers.wsgi.WSGIHandler()
path = '/var/www/example'
if path not in sys.path:
    sys.path.append(path)

And also I've added below code to my settings file:

ALLOWED_HOSTS = [
    '.example.com', # Allow domain and subdomains
    '.example.com.', # Also allow FQDN and subdomains
]

And you replace the example.com with your real domain name? did you get 404 error for this ALLOWED_HOSTS = '*' also? do you have 404.html template file in your root of template folder? — Omid Raha
– Omid Raha, Commented Feb 19, 2014 at 22:32
@OmidRaha Thanks I changed the ALLOWED_HOSTS = '*' and the problem solved. Can you explain why my domain not woks? And yes I change example.com to my real domain name. — hamidfzm
– hamidfzm, Commented Feb 19, 2014 at 22:37
The * is not good, fix it by adding your domain(s), looks at ALLOWED_HOSTS — Omid Raha
– Omid Raha, Commented Feb 19, 2014 at 22:43
The * has security issue, first set * for ALLOWED_HOSTS and then in somewhere in view print and see output of print(request.META['HTTP_HOST']) or print(request.get_host()), then set that output (just domain of it as list) to your ALLOWED_HOSTS — Omid Raha
– Omid Raha, Commented Feb 19, 2014 at 23:54

Omid Raha · Accepted Answer · 2014-02-20 01:03:16Z

20

To discover your problem, first in settings.py set ALLOWED_HOSTS temporarily to:

ALLOWED_HOSTS = '*'

And then in somewhere in your view, try to print out and see output of this command:

print(request.META['HTTP_HOST']) # or print(request.get_host())

Then according to output, set that (just domain of it as an list) to your ALLOWED_HOSTS.

Notes:

Use ALLOWED_HOSTS = '*' may have security issue for you, read about that here.
After every change you need to restart your service(apache/nginx).

answered Feb 20, 2014 at 1:03

Omid Raha

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Yaroslav Nikitenko · Accepted Answer · 2015-03-26 14:50:28Z

0

I've had the same problem with my cyrillic domain.

I've added punicode representation of my domain to ALLOWED_HOSTS, and that solved the problem.

Maybe this should be sent as a bug to Django, but I didn't dig much into that (it could be an issue of my hosting configuration), just ab (and of course browser). The problem was also intermittent for me (usually worse than what is shown below with ab).

Without punicode

Complete requests: 20 Failed requests: 3

while with punicode

Complete requests: 20 Failed requests: 0

answered Mar 26, 2015 at 14:50

Yaroslav Nikitenko

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