def __call__(self, req):
"""Generate a WSGI response based on the exception passed to ctor."""
# Replace the body with fault details.
locale = req.best_match_language()
code = self.wrapped_exc.status_int
fault_name = self._fault_names.get(code, "computeFault")
explanation = self.wrapped_exc.explanation
fault_data = {
fault_name: {
'code': code,
'message': i18n.translate(explanation, locale)}}
if code == 413:
retry = self.wrapped_exc.headers.get('Retry-After', None)
if retry:
fault_data[fault_name]['retryAfter'] = retry
# 'code' is an attribute on the fault tag itself
metadata = {'attributes': {fault_name: 'code'}}
xml_serializer = XMLDictSerializer(metadata, XML_NS_V1)
content_type = req.best_match_content_type()
serializer = {
'application/xml': xml_serializer,
'application/json': JSONDictSerializer(),
}[content_type]
if content_type == 'application/xml':
global XML_WARNING
if not XML_WARNING:
msg = _('XML support has been deprecated and will be removed '
'in the N release.')
versionutils.report_deprecated_feature(LOG, msg)
XML_WARNING = True
body = serializer.serialize(fault_data)
if isinstance(body, six.text_type):
body = body.encode('utf-8')
self.wrapped_exc.body = body
self.wrapped_exc.content_type = content_type
_set_request_id_header(req, self.wrapped_exc.headers)
return self.wrapped_exc
def translate(msg):
locale = request.best_match_language()
return i18n.translate(msg, locale)