Django: custom middleware called twice

django, django-middleware

Solution

The problem is that if you serve favicon.ico by defining it as django url (like the code below):

(r'^favicon\.ico$',
  'django.views.generic.simple.redirect_to',
  {'url': settings.MEDIA_URL+'images/favicon.ico'}),

All your middleware get called twice: 1 time for the page you have requested + 1 time for the favicon (which is always called by the browser). The solution is simple: don't use django urls to serve your vaficon, instead put something like:

<link rel="icon" type="image/png" href="{% static 'core/img/favicon.ico' %}" />

in the `<head>` of your base template!

Problem

I have a custom middleware which is called twice for every request and I don't understand why. This is my middleware: ``` class MyMiddleWare(object): def process_request(self, request): print 'FOO' return None ``` This is my middleware setting: ``` MIDDLEWARE_CLASSES = ( 'django.middleware.common.CommonMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.locale.LocaleMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'MyMiddleware', ) ``` And this is the output in the console after homepage request: ``` [28/Jun/2013 19:48:26] FOO [28/Jun/2013 19:48:26] "GET / HTTP/1.1" 200 7468 [28/Jun/2013 19:48:27] FOO ``` I tried to comment out all the other middlewares and the problem is the same. What should I do? ps: the described behavior is replicable in each view UPDATE: I tried to implement `process_view` rather than `process_request` and it is called once as expected... why? UPDATE 2: `process_response` is called twice like `process_request` UDATE 3: ooooh shiiiit! It's a request to favicon.ico (which I haven't defined myself)... who is calling this file?

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