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from recursive import ForwardRequestException
class ErrorDocumentMiddleware(object):
def __init__(self, app, error_map):
self.app = app
self.error_map = error_map
def __call__(self, environ, start_response):
def replacement_start_response(status, headers, exc_info=None):
try:
status_code = status.split(' ')[0]
except ValueError, TypeError:
raise Exception((
'ErrorDocumentMiddleware received an invalid '
'status %s' % status
))
if status_code in self.error_map:
raise ForwardRequestException(self.error_map[status_code])
return start_response(status, headers, exc_info)
app_iter = self.app(environ, replacement_start_response)
return app_iter
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