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''' |
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Definition of our own error classes. |
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django.http responses are regular returns, the transaction management therefore |
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always commit changes even if we return erroneous responses (400, 404, ...). We can |
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bypass this behaviour by throwing exception that send correct HTTP status to the user |
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but abort the transaction. |
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''' |
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from django.http import HttpResponse, HttpResponseRedirect, HttpResponsePermanentRedirect, HttpResponseNotModified, \ |
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HttpResponseBadRequest, HttpResponseNotFound, HttpResponseForbidden, HttpResponseNotAllowed, HttpResponseGone, \ |
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HttpResponseServerError |
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class OreException(Exception): |
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''' |
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As of Python 2.7, BaseException has no more default message attribute. |
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We therefore define our own base class for this. |
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''' |
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_message = "" |
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def _get_message(self): |
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return self._message |
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def _set_message(self, message): |
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self._message = message |
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def __init__(self, message=''): |
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self.message = message |
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message = property(_get_message, _set_message) |
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class HttpResponseRedirectAnswer(Exception): |
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def __init__(self, target): |
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self.target = target |
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def result(self): |
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return HttpResponseRedirect(self.target) |
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class HttpResponsePermanentRedirectAnswer(Exception): |
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def __init__(self, target): |
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self.target = target |
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def result(self): |
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return HttpResponsePermanentRedirect(self.target) |
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class HttpResponseNotModifiedAnswer(OreException): |
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def result(self): |
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return HttpResponseNotModified(self.message) |
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class HttpResponseBadRequestAnswer(OreException): |
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def result(self): |
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return HttpResponseBadRequest(self.message) |
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class HttpResponseNotFoundAnswer(OreException): |
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def result(self): |
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return HttpResponseNotFound(self.message) |
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class HttpResponseForbiddenAnswer(OreException): |
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def result(self): |
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return HttpResponseForbidden(self.message) |
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class HttpResponseNotAllowedAnswer(Exception): |
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def __init__(self, allowedMethods): |
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self.allowedMethods = allowedMethods |
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def result(self): |
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return HttpResponseNotAllowed(self.allowedMethods) |
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class HttpResponseGoneAnswer(OreException): |
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def result(self): |
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return HttpResponseGone(self.message) |
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class HttpResponseServerErrorAnswer(OreException): |
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def result(self): |
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return HttpResponseServerError(self.message) |
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class HttpResponseCreated(HttpResponse): |
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status_code = 201 |
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class HttpResponseCreatedAnswer(Exception): |
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def result(self): |
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return HttpResponseCreated() |
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class HttpResponseNoResponse(HttpResponse): |
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status_code = 204 |
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class HttpResponseAccepted(HttpResponse): |
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status_code = 202 |
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class HttpResponseNoResponseAnswer(OreException): |
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def result(self): |
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return HttpResponseNoResponse(self.message) |
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class HttpErrorMiddleware(object): |
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def process_exception(self, request, exception): |
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if hasattr(exception, 'result'): |
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return exception.result() |
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else: |
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# default exception handling kicks in |
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return None |
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troeger /
fuzzed
