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147 lines
4.1 KiB
Python
147 lines
4.1 KiB
Python
import asyncio
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from django.http import Http404, HttpResponse
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from django.template import engines
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from django.template.response import TemplateResponse
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from django.utils.decorators import (
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async_only_middleware,
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sync_and_async_middleware,
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sync_only_middleware,
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)
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log = []
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class BaseMiddleware:
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def __init__(self, get_response):
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self.get_response = get_response
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if asyncio.iscoroutinefunction(self.get_response):
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# Mark the class as async-capable.
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self._is_coroutine = asyncio.coroutines._is_coroutine
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def __call__(self, request):
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return self.get_response(request)
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class ProcessExceptionMiddleware(BaseMiddleware):
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def process_exception(self, request, exception):
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return HttpResponse("Exception caught")
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@async_only_middleware
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class AsyncProcessExceptionMiddleware(BaseMiddleware):
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async def process_exception(self, request, exception):
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return HttpResponse("Exception caught")
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class ProcessExceptionLogMiddleware(BaseMiddleware):
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def process_exception(self, request, exception):
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log.append("process-exception")
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class ProcessExceptionExcMiddleware(BaseMiddleware):
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def process_exception(self, request, exception):
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raise Exception("from process-exception")
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class ProcessViewMiddleware(BaseMiddleware):
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def process_view(self, request, view_func, view_args, view_kwargs):
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return HttpResponse("Processed view %s" % view_func.__name__)
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@async_only_middleware
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class AsyncProcessViewMiddleware(BaseMiddleware):
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async def process_view(self, request, view_func, view_args, view_kwargs):
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return HttpResponse("Processed view %s" % view_func.__name__)
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class ProcessViewNoneMiddleware(BaseMiddleware):
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def process_view(self, request, view_func, view_args, view_kwargs):
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log.append("processed view %s" % view_func.__name__)
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return None
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class ProcessViewTemplateResponseMiddleware(BaseMiddleware):
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def process_view(self, request, view_func, view_args, view_kwargs):
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template = engines["django"].from_string(
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"Processed view {{ view }}{% for m in mw %}\n{{ m }}{% endfor %}"
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)
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return TemplateResponse(
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request,
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template,
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{"mw": [self.__class__.__name__], "view": view_func.__name__},
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)
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class TemplateResponseMiddleware(BaseMiddleware):
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def process_template_response(self, request, response):
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response.context_data["mw"].append(self.__class__.__name__)
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return response
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@async_only_middleware
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class AsyncTemplateResponseMiddleware(BaseMiddleware):
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async def process_template_response(self, request, response):
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response.context_data["mw"].append(self.__class__.__name__)
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return response
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class LogMiddleware(BaseMiddleware):
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def __call__(self, request):
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response = self.get_response(request)
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log.append((response.status_code, response.content))
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return response
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class NoTemplateResponseMiddleware(BaseMiddleware):
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def process_template_response(self, request, response):
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return None
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@async_only_middleware
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class AsyncNoTemplateResponseMiddleware(BaseMiddleware):
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async def process_template_response(self, request, response):
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return None
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class NotFoundMiddleware(BaseMiddleware):
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def __call__(self, request):
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raise Http404("not found")
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class PaymentMiddleware(BaseMiddleware):
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def __call__(self, request):
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response = self.get_response(request)
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response.status_code = 402
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return response
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@async_only_middleware
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def async_payment_middleware(get_response):
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async def middleware(request):
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response = await get_response(request)
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response.status_code = 402
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return response
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return middleware
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@sync_and_async_middleware
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class SyncAndAsyncMiddleware(BaseMiddleware):
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pass
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@sync_only_middleware
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class DecoratedPaymentMiddleware(PaymentMiddleware):
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pass
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class NotSyncOrAsyncMiddleware(BaseMiddleware):
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"""Middleware that is deliberately neither sync or async."""
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sync_capable = False
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async_capable = False
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def __call__(self, request):
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return self.get_response(request)
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