Other approach of making middleware. Advantage of is to specify, which middleware is used for which view function and in what order. Middleware function gets all arguments, that are passed to view function.
Example usage
@RequestMiddleware
def print_params_middleware(request, *args, **kwargs):
print 'GET params:', request.GET
@ResponseMiddleware
def modify_headers_middleware(request, response, *args, **kwargs):
response['Content-Type'] = 'text/html'
@ExceptionMiddleware
def catch_error_middleware(request, e, *args, **kwargs):
return HttpResponse('catched error %s' % e )
@modify_headers_middleware
@catch_error_middleware
@print_params_middleware
def some_view(request, *args, **kwargs):
print 'someview'
return HttpResponse()
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 | from functools import wraps
def RequestMiddleware(middleware_func):
""" RequestMiddleware """
@wraps(middleware_func)
def middleware(view_func):
""" middleware """
@wraps(view_func)
def new_view_func(request, *args, **kwargs ):
""" new_view_func """
middleware_func(request, *args, **kwargs)
return view_func(request, *args, **kwargs)
return new_view_func
return middleware
def ResponseMiddleware(middleware_func):
""" ResponseMiddleware """
@wraps(middleware_func)
def middleware(view_func):
""" middleware """
@wraps(view_func)
def new_view_func(request, *args, **kwargs ):
""" new_view_func """
response = view_func(request, *args, **kwargs)
middleware_func(request, response, *args, **kwargs)
return response
return new_view_func
return middleware
def ExceptionMiddleware(middleware_func):
""" ExceptionMiddleware """
@wraps(middleware_func)
def middleware(view_func):
""" middleware """
@wraps(view_func)
def new_view_func(request, *args, **kwargs ):
""" new_view_func """
try:
response = view_func(request, *args, **kwargs)
except Exception, e:
response = middleware_func(request, e, *args, **kwargs)
if response is None:
raise
return response
return new_view_func
return middleware
|
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