import sys
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from pyramid.compat import reraise
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from pyramid.httpexceptions import HTTPNotFound
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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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try:
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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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return response
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def excview_tween_factory(handler, registry):
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""" A :term:`tween` factory which produces a tween that catches an
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exception raised by downstream tweens (or the main Pyramid request
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handler) and, if possible, converts it into a Response using an
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:term:`exception view`.
|
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.. versionchanged:: 1.9
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The ``request.response`` will be remain unchanged even if the tween
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handles an exception. Previously it was deleted after handling an
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exception.
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Also, ``request.exception`` and ``request.exc_info`` are only set if
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the tween handles an exception and returns a response otherwise they
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are left at their original values.
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"""
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def excview_tween(request):
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try:
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response = handler(request)
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except Exception as exc:
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response = _error_handler(request, exc)
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return response
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return excview_tween
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MAIN = 'MAIN'
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INGRESS = 'INGRESS'
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EXCVIEW = 'pyramid.tweens.excview_tween_factory'
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