def __exit__(self, ex_type, ex_value, ex_traceback):
if not ex_value:
return True
if isinstance(ex_value, exception.NotAuthorized):
raise Fault(webob.exc.HTTPForbidden(explanation=ex_value.msg))
elif isinstance(ex_value, exception.Invalid):
raise Fault(
exception.ConvertedException(code=ex_value.code,
explanation=ex_value.msg))
elif isinstance(ex_value, TypeError):
exc_info = (ex_type, ex_value, ex_traceback)
LOG.error(_LE('Exception handling resource: %s'),
ex_value,
exc_info=exc_info)
raise Fault(webob.exc.HTTPBadRequest())
elif isinstance(ex_value, Fault):
LOG.info(_LI("Fault thrown: %s"), ex_value)
raise ex_value
elif isinstance(ex_value, webob.exc.HTTPException):
LOG.info(_LI("HTTP exception thrown: %s"), ex_value)
raise Fault(ex_value)
# We didn't handle the exception
return False
def _error(self, inner, req):
LOG.exception(_LE("Caught error: %(type)s %(error)s"), {
'type': type(inner),
'error': inner
})
safe = getattr(inner, 'safe', False)
headers = getattr(inner, 'headers', None)
status = getattr(inner, 'code', 500)
if status is None:
status = 500
msg_dict = dict(url=req.url, status=status)
LOG.info(_LI("%(url)s returned with HTTP %(status)d"), msg_dict)
outer = self.status_to_type(status)
if headers:
outer.headers = headers
if safe:
msg = (inner.msg if isinstance(inner, exception.CoriolisException)
else six.text_type(inner))
params = {
'exception': inner.__class__.__name__,
'explanation': msg
}
outer.explanation = _('%(exception)s: %(explanation)s') % params
return wsgi.Fault(outer)
def __exit__(self, ex_type, ex_value, ex_traceback):
if not ex_value:
return True
if isinstance(ex_value, exception.NotAuthorized):
raise Fault(webob.exc.HTTPForbidden(explanation=ex_value.msg))
elif isinstance(ex_value, exception.Invalid):
raise Fault(exception.ConvertedException(
code=ex_value.code, explanation=ex_value.msg))
elif isinstance(ex_value, TypeError):
exc_info = (ex_type, ex_value, ex_traceback)
LOG.error(_LE(
'Exception handling resource: %s'),
ex_value, exc_info=exc_info)
raise Fault(webob.exc.HTTPBadRequest())
elif isinstance(ex_value, Fault):
LOG.info(_LI("Fault thrown: %s"), ex_value)
raise ex_value
elif isinstance(ex_value, webob.exc.HTTPException):
LOG.info(_LI("HTTP exception thrown: %s"), ex_value)
raise Fault(ex_value)
# We didn't handle the exception
return False
def __call__(self, request):
"""WSGI method that controls (de)serialization and method dispatch."""
LOG.info(_LI("%(method)s %(url)s"),
{"method": request.method,
"url": request.url})
# Identify the action, its arguments, and the requested
# content type
action_args = self.get_action_args(request.environ)
action = action_args.pop('action', None)
content_type, body = self.get_body(request)
accept = request.best_match_content_type()
# NOTE(Vek): Splitting the function up this way allows for
# auditing by external tools that wrap the existing
# function. If we try to audit __call__(), we can
# run into troubles due to the @webob.dec.wsgify()
# decorator.
return self._process_stack(request, action, action_args,
content_type, body, accept)
def __call__(self, request):
"""WSGI method that controls (de)serialization and method dispatch."""
LOG.info(_LI("%(method)s %(url)s"), {
"method": request.method,
"url": request.url
})
# Identify the action, its arguments, and the requested
# content type
action_args = self.get_action_args(request.environ)
action = action_args.pop('action', None)
content_type, body = self.get_body(request)
accept = request.best_match_content_type()
# NOTE(Vek): Splitting the function up this way allows for
# auditing by external tools that wrap the existing
# function. If we try to audit __call__(), we can
# run into troubles due to the @webob.dec.wsgify()
# decorator.
return self._process_stack(request, action, action_args, content_type,
body, accept)
def _error(self, inner, req):
LOG.exception(_LE("Caught error: %(type)s %(error)s"),
{'type': type(inner),
'error': inner})
safe = getattr(inner, 'safe', False)
headers = getattr(inner, 'headers', None)
status = getattr(inner, 'code', 500)
if status is None:
status = 500
msg_dict = dict(url=req.url, status=status)
LOG.info(_LI("%(url)s returned with HTTP %(status)d"), msg_dict)
outer = self.status_to_type(status)
if headers:
outer.headers = headers
if safe:
msg = (inner.msg if isinstance(inner, exception.CoriolisException)
else six.text_type(inner))
params = {'exception': inner.__class__.__name__,
'explanation': msg}
outer.explanation = _('%(exception)s: %(explanation)s') % params
return wsgi.Fault(outer)
def _process_stack(self, request, action, action_args,
content_type, body, accept):
"""Implement the processing stack."""
# Get the implementing method
try:
meth, extensions = self.get_method(request, action,
content_type, body)
except (AttributeError, TypeError):
return Fault(webob.exc.HTTPNotFound())
except KeyError as ex:
msg = _("There is no such action: %s") % ex.args[0]
return Fault(webob.exc.HTTPBadRequest(explanation=msg))
except exception.MalformedRequestBody:
msg = _("Malformed request body")
return Fault(webob.exc.HTTPBadRequest(explanation=msg))
# Now, deserialize the request body...
try:
if content_type:
contents = self.deserialize(meth, content_type, body)
else:
contents = {}
except exception.InvalidContentType:
msg = _("Unsupported Content-Type")
return Fault(webob.exc.HTTPBadRequest(explanation=msg))
except exception.MalformedRequestBody:
msg = _("Malformed request body")
return Fault(webob.exc.HTTPBadRequest(explanation=msg))
# Update the action args
action_args.update(contents)
project_id = action_args.pop("project_id", None)
context = request.environ.get('coriolis.context')
if (context and project_id and (project_id != context.tenant)):
msg = _("Malformed request url")
return Fault(webob.exc.HTTPBadRequest(explanation=msg))
# Run pre-processing extensions
response, post = self.pre_process_extensions(extensions,
request, action_args)
if not response:
try:
with ResourceExceptionHandler():
action_result = self.dispatch(meth, request, action_args)
except Fault as ex:
response = ex
if not response:
# No exceptions; convert action_result into a
# ResponseObject
resp_obj = None
if type(action_result) is dict or action_result is None:
resp_obj = ResponseObject(action_result)
elif isinstance(action_result, ResponseObject):
resp_obj = action_result
else:
response = action_result
# Run post-processing extensions
if resp_obj:
_set_request_id_header(request, resp_obj)
# Do a preserialize to set up the response object
serializers = getattr(meth, 'wsgi_serializers', {})
resp_obj._bind_method_serializers(serializers)
if hasattr(meth, 'wsgi_code'):
resp_obj._default_code = meth.wsgi_code
resp_obj.preserialize(accept, self.default_serializers)
# Process post-processing extensions
response = self.post_process_extensions(post, resp_obj,
request, action_args)
if resp_obj and not response:
response = resp_obj.serialize(request, accept,
self.default_serializers)
try:
msg_dict = dict(url=request.url, status=response.status_int)
msg = _LI("%(url)s returned with HTTP %(status)d")
except AttributeError as e:
msg_dict = dict(url=request.url, e=e)
msg = _LI("%(url)s returned a fault: %(e)s")
LOG.info(msg, msg_dict)
return response
def _process_stack(self, request, action, action_args, content_type, body,
accept):
"""Implement the processing stack."""
# Get the implementing method
try:
meth, extensions = self.get_method(request, action, content_type,
body)
except (AttributeError, TypeError):
return Fault(webob.exc.HTTPNotFound())
except KeyError as ex:
msg = _("There is no such action: %s") % ex.args[0]
return Fault(webob.exc.HTTPBadRequest(explanation=msg))
except exception.MalformedRequestBody:
msg = _("Malformed request body")
return Fault(webob.exc.HTTPBadRequest(explanation=msg))
# Now, deserialize the request body...
try:
if content_type:
contents = self.deserialize(meth, content_type, body)
else:
contents = {}
except exception.InvalidContentType:
msg = _("Unsupported Content-Type")
return Fault(webob.exc.HTTPBadRequest(explanation=msg))
except exception.MalformedRequestBody:
msg = _("Malformed request body")
return Fault(webob.exc.HTTPBadRequest(explanation=msg))
# Update the action args
action_args.update(contents)
project_id = action_args.pop("project_id", None)
context = request.environ.get('coriolis.context')
if (context and project_id and (project_id != context.tenant)):
msg = _("Malformed request url")
return Fault(webob.exc.HTTPBadRequest(explanation=msg))
# Run pre-processing extensions
response, post = self.pre_process_extensions(extensions, request,
action_args)
if not response:
try:
with ResourceExceptionHandler():
action_result = self.dispatch(meth, request, action_args)
except Fault as ex:
response = ex
if not response:
# No exceptions; convert action_result into a
# ResponseObject
resp_obj = None
if type(action_result) is dict or action_result is None:
resp_obj = ResponseObject(action_result)
elif isinstance(action_result, ResponseObject):
resp_obj = action_result
else:
response = action_result
# Run post-processing extensions
if resp_obj:
_set_request_id_header(request, resp_obj)
# Do a preserialize to set up the response object
serializers = getattr(meth, 'wsgi_serializers', {})
resp_obj._bind_method_serializers(serializers)
if hasattr(meth, 'wsgi_code'):
resp_obj._default_code = meth.wsgi_code
resp_obj.preserialize(accept, self.default_serializers)
# Process post-processing extensions
response = self.post_process_extensions(
post, resp_obj, request, action_args)
if resp_obj and not response:
response = resp_obj.serialize(request, accept,
self.default_serializers)
try:
msg_dict = dict(url=request.url, status=response.status_int)
msg = _LI("%(url)s returned with HTTP %(status)d")
except AttributeError as e:
msg_dict = dict(url=request.url, e=e)
msg = _LI("%(url)s returned a fault: %(e)s")
LOG.info(msg, msg_dict)
return response
