python - Django - j'ai une application simple avec un affichage simple - pourquoi il est appelée deux fois pour chaque requête d'url ? -Débordement de pile

MyProj/myproj/urls.py:

from django.conf.urls import patterns, include, url
from django.contrib import admin
admin.autodiscover()

urlpatterns = patterns('',
    url(r'^accounts/login/$', 'django.contrib.auth.views.login'),
    url(r'^accounts/logout/$', 'django.contrib.auth.views.logout_then_login'),
    url(r'^admin/', include(admin.site.urls)),
    url(r'^', include('apps.data.urls')),
)

MyProj/apps/data/urls.py:

from django.conf.urls import patterns, url

urlpatterns = patterns('',
   url('^tasks/sync_database/', 'apps.data.views.sync_database'),
)

MyProj/apps/data/views.py:

from .tasks import sync_database as sync_database_task
from django.shortcuts import redirect

def sync_database(request):
    sync_demand_stacks_task()
    return redirect('/')

The task takes about 5 minutes to run. I expect that when I visit the url localhost:8000/tasks/sync_database/ that the web page should block for the duration of the time it takes the task to run, then show me the home page at url localhost:8000/.

This does happen, but instead of running the task just once it runs it twice. What gives?

EDIT: I see this output in the console at the very end of the first request:

127.0.0.1 - - [20/Feb/2014 15:18:43] "GET /tasks/sync_database/? HTTP/1.1" 500 -

I'm wondering where this URL with a question mark appended comes from.

Getting my favicon to work correctly has apparently made the problem disappear.

MyProj/myproj/urls.py:

from django.conf.urls import patterns, include, url
from django.contrib import admin
admin.autodiscover()

urlpatterns = patterns('',
    url(r'^accounts/login/$', 'django.contrib.auth.views.login'),
    url(r'^accounts/logout/$', 'django.contrib.auth.views.logout_then_login'),
    url(r'^admin/', include(admin.site.urls)),
    url(r'^', include('apps.data.urls')),
)

MyProj/apps/data/urls.py:

from django.conf.urls import patterns, url

urlpatterns = patterns('',
   url('^tasks/sync_database/', 'apps.data.views.sync_database'),
)

MyProj/apps/data/views.py:

from .tasks import sync_database as sync_database_task
from django.shortcuts import redirect

def sync_database(request):
    sync_demand_stacks_task()
    return redirect('/')

The task takes about 5 minutes to run. I expect that when I visit the url localhost:8000/tasks/sync_database/ that the web page should block for the duration of the time it takes the task to run, then show me the home page at url localhost:8000/.

This does happen, but instead of running the task just once it runs it twice. What gives?

EDIT: I see this output in the console at the very end of the first request:

127.0.0.1 - - [20/Feb/2014 15:18:43] "GET /tasks/sync_database/? HTTP/1.1" 500 -

I'm wondering where this URL with a question mark appended comes from.

Getting my favicon to work correctly has apparently made the problem disappear.

Source