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django/django/template/context_processors.py at main · django/django · GitHub

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"""

A set of request processors that return dictionaries to be merged into a

template context. Each function takes the request object as its only parameter

and returns a dictionary to add to the context.

These are referenced from the 'context_processors' option of the configuration

of a DjangoTemplates backend and used by RequestContext.

"""

import itertools

from django.conf import settings

from django.middleware.csp import get_nonce

from django.middleware.csrf import get_token

from django.utils.functional import SimpleLazyObject, lazy

def csrf(request):

"""

Context processor that provides a CSRF token, or the string 'NOTPROVIDED'

if it has not been provided by either a view decorator or the middleware

"""

def _get_val():

token = get_token(request)

if token is None:

# In order to be able to provide debugging info in the

# case of misconfiguration, we use a sentinel value

# instead of returning an empty dict.

return "NOTPROVIDED"

else:

return token

return {"csrf_token": SimpleLazyObject(_get_val)}

def debug(request):

"""

Return context variables helpful for debugging.

"""

context_extras = {}

if settings.DEBUG and request.META.get("REMOTE_ADDR") in settings.INTERNAL_IPS:

context_extras["debug"] = True

from django.db import connections

# Return a lazy reference that computes connection.queries on access,

# to ensure it contains queries triggered after this function runs.

context_extras["sql_queries"] = lazy(

lambda: list(

itertools.chain.from_iterable(

connections[x].queries for x in connections

)

list,

)

return context_extras

def i18n(request):

from django.utils import translation

return {

"LANGUAGES": settings.LANGUAGES,

"LANGUAGE_CODE": translation.get_language(),

"LANGUAGE_BIDI": translation.get_language_bidi(),

}

def tz(request):

from django.utils import timezone

return {"TIME_ZONE": timezone.get_current_timezone_name()}

def static(request):

"""

Add static-related context variables to the context.

"""

return {"STATIC_URL": settings.STATIC_URL}

def media(request):

"""

Add media-related context variables to the context.

"""

return {"MEDIA_URL": settings.MEDIA_URL}

def request(request):

return {"request": request}

def csp(request):

"""

Add the CSP nonce to the context.

"""

return {"csp_nonce": get_nonce(request)}

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