description

gadjo.requestprovider gives access to django’s HTTPRequest object whenever is needed, without explicitly passing it down the path of code.

usage

add gadjo’s requestprovider middleware to django’s settings.py:

MIDDLEWARE_CLASSES=( ‘gadjo.requestprovider.middleware.RequestProvider’, … )

Whenever you need the request object (from your model, form, etc):

from gadjo.requestprovider.signals import get_request

http_request = get_request()

implementation details

besides saving a reference to the current request, the RequestProvider middleware also registers itself as a receiver for whoever signals that it needs the request object.

whenver a get_request() is issued, the middleware is called to process the signal and returns the request object. this works because the signals in django are processed synchronously. get_request() calls send() on the request_accessor SingleHandlerSignal(Signal) object and returns the current request to the caller. A SingleHandlerSignal is a Signal that makes sure it will only register authorized receivers. This is to make sure no one will register a handler (maybe by mistake) for a request_accessor signal since this is supposed to be handled only by our RequestProvider middleware.

class SingleHandlerSignal(Signal):

allowed_receiver=’gadjo.requestprovider.middleware.RequestProvider’

the Signal’s connect() method is overwritten to register only allowed receivers.

TODO

nothing

NOTE

this is not thread-safe. however, if you are running your django apps in a threaded environment I don’t think you really know what you’re doing.