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| | | import sys |
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| | | |
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| | | from pyramid.compat import reraise |
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| | | from pyramid.exceptions import PredicateMismatch |
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| | | from pyramid.interfaces import ( |
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| | | IExceptionViewClassifier, |
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| | | IRequest, |
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| | | ) |
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| | | |
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| | | from zope.interface import providedBy |
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| | | from pyramid.view import _call_view |
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| | | from pyramid.httpexceptions import HTTPNotFound |
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| | | |
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| | | def _error_handler(request, exc): |
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| | | # NOTE: we do not need to delete exc_info because this function |
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| | | # should never be in the call stack of the exception |
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| | | exc_info = sys.exc_info() |
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| | | |
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| | | attrs = request.__dict__ |
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| | | attrs['exc_info'] = exc_info |
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| | | attrs['exception'] = exc |
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| | | # clear old generated request.response, if any; it may |
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| | | # have been mutated by the view, and its state is not |
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| | | # sane (e.g. caching headers) |
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| | | if 'response' in attrs: |
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| | | del attrs['response'] |
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| | | # we use .get instead of .__getitem__ below due to |
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| | | # https://github.com/Pylons/pyramid/issues/700 |
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| | | request_iface = attrs.get('request_iface', IRequest) |
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| | | provides = providedBy(exc) |
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| | | try: |
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| | | response = _call_view( |
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| | | request.registry, |
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| | | request, |
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| | | exc, |
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| | | provides, |
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| | | '', |
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| | | view_classifier=IExceptionViewClassifier, |
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| | | request_iface=request_iface.combined |
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| | | ) |
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| | | |
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| | | # if views matched but did not pass predicates then treat the |
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| | | # same as not finding any matching views |
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| | | except PredicateMismatch: |
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| | | response = None |
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| | | |
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| | | # re-raise the original exception as no exception views were |
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| | | # able to handle the error |
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| | | if response is None: |
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| | | if 'exception' in attrs: |
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| | | del attrs['exception'] |
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| | | if 'exc_info' in attrs: |
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| | | del attrs['exc_info'] |
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| | | response = request.invoke_exception_view(exc_info) |
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| | | except HTTPNotFound: |
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| | | # re-raise the original exception as no exception views were |
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| | | # able to handle the error |
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| | | reraise(*exc_info) |
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| | | |
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| | | return response |
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