openapi-core/openapi_core/parameters.py
2017-11-06 11:00:13 +00:00

104 lines
3.3 KiB
Python

"""OpenAPI core parameters module"""
import logging
import warnings
from six import iteritems
from openapi_core.exceptions import (
EmptyValue, InvalidValueType, InvalidParameterValue,
)
log = logging.getLogger(__name__)
class Parameter(object):
"""Represents an OpenAPI operation Parameter."""
def __init__(
self, name, location, schema=None, required=False,
deprecated=False, allow_empty_value=False,
items=None, collection_format=None):
self.name = name
self.location = location
self.schema = schema
self.required = True if self.location == "path" else required
self.deprecated = deprecated
self.allow_empty_value = (
allow_empty_value if self.location == "query" else False
)
self.items = items
self.collection_format = collection_format
def unmarshal(self, value):
if self.deprecated:
warnings.warn(
"{0} parameter is deprecated".format(self.name),
DeprecationWarning,
)
if (self.location == "query" and value == "" and
not self.allow_empty_value):
raise EmptyValue(
"Value of {0} parameter cannot be empty".format(self.name))
if not self.schema:
return value
try:
return self.schema.unmarshal(value)
except InvalidValueType as exc:
raise InvalidParameterValue(str(exc))
class ParametersGenerator(object):
def __init__(self, dereferencer, schemas_registry):
self.dereferencer = dereferencer
self.schemas_registry = schemas_registry
def generate(self, parameters):
for parameter_name, parameter in iteritems(parameters):
parameter_deref = self.dereferencer.dereference(parameter)
parameter_in = parameter_deref.get('in', 'header')
allow_empty_value = parameter_deref.get('allowEmptyValue')
required = parameter_deref.get('required', False)
schema_spec = parameter_deref.get('schema', None)
schema = None
if schema_spec:
schema, _ = self.schemas_registry.get_or_create(schema_spec)
yield (
parameter_name,
Parameter(
parameter_name, parameter_in,
schema=schema, required=required,
allow_empty_value=allow_empty_value,
),
)
def generate_from_list(self, parameters_list):
for parameter in parameters_list:
parameter_deref = self.dereferencer.dereference(parameter)
parameter_name = parameter_deref['name']
parameter_in = parameter_deref.get('in', 'header')
allow_empty_value = parameter_deref.get('allowEmptyValue')
required = parameter_deref.get('required', False)
schema_spec = parameter_deref.get('schema', None)
schema = None
if schema_spec:
schema, _ = self.schemas_registry.get_or_create(schema_spec)
yield (
parameter_name,
Parameter(
parameter_name, parameter_in,
schema=schema, required=required,
allow_empty_value=allow_empty_value,
),
)