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from django.http import Http404, HttpResponse
from django.template import engines
from django.template.response import TemplateResponse
log = []
class BaseMiddleware:
def __init__(self, get_response):
self.get_response = get_response
def __call__(self, request):
return self.get_response(request)
class ProcessExceptionMiddleware(BaseMiddleware):
def process_exception(self, request, exception):
return HttpResponse('Exception caught')
class ProcessExceptionLogMiddleware(BaseMiddleware):
def process_exception(self, request, exception):
log.append('process-exception')
class ProcessExceptionExcMiddleware(BaseMiddleware):
def process_exception(self, request, exception):
raise Exception('from process-exception')
class ProcessViewMiddleware(BaseMiddleware):
def process_view(self, request, view_func, view_args, view_kwargs):
return HttpResponse('Processed view %s' % view_func.__name__)
class ProcessViewNoneMiddleware(BaseMiddleware):
def process_view(self, request, view_func, view_args, view_kwargs):
log.append('processed view %s' % view_func.__name__)
return None
class ProcessViewTemplateResponseMiddleware(BaseMiddleware):
def process_view(self, request, view_func, view_args, view_kwargs):
template = engines['django'].from_string('Processed view {{ view }}{% for m in mw %}\n{{ m }}{% endfor %}')
return TemplateResponse(request, template, {'mw': [self.__class__.__name__], 'view': view_func.__name__})
class TemplateResponseMiddleware(BaseMiddleware):
def process_template_response(self, request, response):
response.context_data['mw'].append(self.__class__.__name__)
return response
class LogMiddleware(BaseMiddleware):
def __call__(self, request):
response = self.get_response(request)
log.append((response.status_code, response.content))
return response
class NoTemplateResponseMiddleware(BaseMiddleware):
def process_template_response(self, request, response):
return None
class NotFoundMiddleware(BaseMiddleware):
def __call__(self, request):
raise Http404('not found')
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