mirror of
https://github.com/morpheus65535/bazarr
synced 2024-12-23 00:03:33 +00:00
379 lines
13 KiB
Python
379 lines
13 KiB
Python
# -*- coding: utf-8 -*-
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from __future__ import unicode_literals
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import inspect
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import warnings
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import logging
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from collections import namedtuple, OrderedDict
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import six
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from flask import request
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from flask.views import http_method_funcs
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from ._http import HTTPStatus
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from .errors import abort
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from .marshalling import marshal, marshal_with
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from .model import Model, OrderedModel, SchemaModel
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from .reqparse import RequestParser
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from .utils import merge
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# Container for each route applied to a Resource using @ns.route decorator
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ResourceRoute = namedtuple("ResourceRoute", "resource urls route_doc kwargs")
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class Namespace(object):
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"""
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Group resources together.
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Namespace is to API what :class:`flask:flask.Blueprint` is for :class:`flask:flask.Flask`.
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:param str name: The namespace name
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:param str description: An optional short description
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:param str path: An optional prefix path. If not provided, prefix is ``/+name``
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:param list decorators: A list of decorators to apply to each resources
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:param bool validate: Whether or not to perform validation on this namespace
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:param bool ordered: Whether or not to preserve order on models and marshalling
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:param Api api: an optional API to attache to the namespace
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"""
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def __init__(
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self,
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name,
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description=None,
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path=None,
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decorators=None,
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validate=None,
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authorizations=None,
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ordered=False,
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**kwargs
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):
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self.name = name
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self.description = description
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self._path = path
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self._schema = None
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self._validate = validate
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self.models = {}
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self.urls = {}
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self.decorators = decorators if decorators else []
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self.resources = [] # List[ResourceRoute]
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self.error_handlers = OrderedDict()
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self.default_error_handler = None
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self.authorizations = authorizations
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self.ordered = ordered
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self.apis = []
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if "api" in kwargs:
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self.apis.append(kwargs["api"])
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self.logger = logging.getLogger(__name__ + "." + self.name)
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@property
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def path(self):
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return (self._path or ("/" + self.name)).rstrip("/")
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def add_resource(self, resource, *urls, **kwargs):
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"""
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Register a Resource for a given API Namespace
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:param Resource resource: the resource ro register
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:param str urls: one or more url routes to match for the resource,
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standard flask routing rules apply.
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Any url variables will be passed to the resource method as args.
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:param str endpoint: endpoint name (defaults to :meth:`Resource.__name__.lower`
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Can be used to reference this route in :class:`fields.Url` fields
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:param list|tuple resource_class_args: args to be forwarded to the constructor of the resource.
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:param dict resource_class_kwargs: kwargs to be forwarded to the constructor of the resource.
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Additional keyword arguments not specified above will be passed as-is
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to :meth:`flask.Flask.add_url_rule`.
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Examples::
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namespace.add_resource(HelloWorld, '/', '/hello')
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namespace.add_resource(Foo, '/foo', endpoint="foo")
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namespace.add_resource(FooSpecial, '/special/foo', endpoint="foo")
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"""
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route_doc = kwargs.pop("route_doc", {})
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self.resources.append(ResourceRoute(resource, urls, route_doc, kwargs))
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for api in self.apis:
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ns_urls = api.ns_urls(self, urls)
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api.register_resource(self, resource, *ns_urls, **kwargs)
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def route(self, *urls, **kwargs):
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"""
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A decorator to route resources.
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"""
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def wrapper(cls):
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doc = kwargs.pop("doc", None)
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if doc is not None:
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# build api doc intended only for this route
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kwargs["route_doc"] = self._build_doc(cls, doc)
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self.add_resource(cls, *urls, **kwargs)
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return cls
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return wrapper
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def _build_doc(self, cls, doc):
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if doc is False:
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return False
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unshortcut_params_description(doc)
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handle_deprecations(doc)
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for http_method in http_method_funcs:
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if http_method in doc:
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if doc[http_method] is False:
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continue
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unshortcut_params_description(doc[http_method])
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handle_deprecations(doc[http_method])
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if "expect" in doc[http_method] and not isinstance(
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doc[http_method]["expect"], (list, tuple)
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):
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doc[http_method]["expect"] = [doc[http_method]["expect"]]
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return merge(getattr(cls, "__apidoc__", {}), doc)
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def doc(self, shortcut=None, **kwargs):
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"""A decorator to add some api documentation to the decorated object"""
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if isinstance(shortcut, six.text_type):
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kwargs["id"] = shortcut
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show = shortcut if isinstance(shortcut, bool) else True
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def wrapper(documented):
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documented.__apidoc__ = self._build_doc(
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documented, kwargs if show else False
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)
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return documented
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return wrapper
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def hide(self, func):
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"""A decorator to hide a resource or a method from specifications"""
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return self.doc(False)(func)
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def abort(self, *args, **kwargs):
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"""
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Properly abort the current request
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See: :func:`~flask_restx.errors.abort`
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"""
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abort(*args, **kwargs)
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def add_model(self, name, definition):
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self.models[name] = definition
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for api in self.apis:
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api.models[name] = definition
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return definition
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def model(self, name=None, model=None, mask=None, strict=False, **kwargs):
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"""
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Register a model
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:param bool strict - should model validation raise error when non-specified param
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is provided?
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.. seealso:: :class:`Model`
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"""
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cls = OrderedModel if self.ordered else Model
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model = cls(name, model, mask=mask, strict=strict)
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model.__apidoc__.update(kwargs)
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return self.add_model(name, model)
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def schema_model(self, name=None, schema=None):
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"""
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Register a model
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.. seealso:: :class:`Model`
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"""
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model = SchemaModel(name, schema)
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return self.add_model(name, model)
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def extend(self, name, parent, fields):
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"""
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Extend a model (Duplicate all fields)
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:deprecated: since 0.9. Use :meth:`clone` instead
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"""
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if isinstance(parent, list):
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parents = parent + [fields]
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model = Model.extend(name, *parents)
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else:
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model = Model.extend(name, parent, fields)
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return self.add_model(name, model)
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def clone(self, name, *specs):
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"""
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Clone a model (Duplicate all fields)
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:param str name: the resulting model name
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:param specs: a list of models from which to clone the fields
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.. seealso:: :meth:`Model.clone`
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"""
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model = Model.clone(name, *specs)
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return self.add_model(name, model)
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def inherit(self, name, *specs):
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"""
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Inherit a model (use the Swagger composition pattern aka. allOf)
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.. seealso:: :meth:`Model.inherit`
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"""
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model = Model.inherit(name, *specs)
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return self.add_model(name, model)
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def expect(self, *inputs, **kwargs):
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"""
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A decorator to Specify the expected input model
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:param ModelBase|Parse inputs: An expect model or request parser
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:param bool validate: whether to perform validation or not
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"""
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expect = []
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params = {"validate": kwargs.get("validate", self._validate), "expect": expect}
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for param in inputs:
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expect.append(param)
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return self.doc(**params)
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def parser(self):
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"""Instanciate a :class:`~RequestParser`"""
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return RequestParser()
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def as_list(self, field):
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"""Allow to specify nested lists for documentation"""
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field.__apidoc__ = merge(getattr(field, "__apidoc__", {}), {"as_list": True})
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return field
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def marshal_with(
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self, fields, as_list=False, code=HTTPStatus.OK, description=None, **kwargs
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):
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"""
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A decorator specifying the fields to use for serialization.
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:param bool as_list: Indicate that the return type is a list (for the documentation)
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:param int code: Optionally give the expected HTTP response code if its different from 200
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"""
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def wrapper(func):
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doc = {
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"responses": {
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str(code): (description, [fields], kwargs)
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if as_list
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else (description, fields, kwargs)
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},
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"__mask__": kwargs.get(
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"mask", True
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), # Mask values can't be determined outside app context
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}
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func.__apidoc__ = merge(getattr(func, "__apidoc__", {}), doc)
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return marshal_with(fields, ordered=self.ordered, **kwargs)(func)
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return wrapper
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def marshal_list_with(self, fields, **kwargs):
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"""A shortcut decorator for :meth:`~Api.marshal_with` with ``as_list=True``"""
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return self.marshal_with(fields, True, **kwargs)
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def marshal(self, *args, **kwargs):
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"""A shortcut to the :func:`marshal` helper"""
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return marshal(*args, **kwargs)
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def errorhandler(self, exception):
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"""A decorator to register an error handler for a given exception"""
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if inspect.isclass(exception) and issubclass(exception, Exception):
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# Register an error handler for a given exception
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def wrapper(func):
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self.error_handlers[exception] = func
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return func
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return wrapper
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else:
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# Register the default error handler
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self.default_error_handler = exception
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return exception
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def param(self, name, description=None, _in="query", **kwargs):
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"""
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A decorator to specify one of the expected parameters
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:param str name: the parameter name
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:param str description: a small description
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:param str _in: the parameter location `(query|header|formData|body|cookie)`
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"""
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param = kwargs
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param["in"] = _in
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param["description"] = description
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return self.doc(params={name: param})
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def response(self, code, description, model=None, **kwargs):
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"""
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A decorator to specify one of the expected responses
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:param int code: the HTTP status code
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:param str description: a small description about the response
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:param ModelBase model: an optional response model
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"""
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return self.doc(responses={str(code): (description, model, kwargs)})
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def header(self, name, description=None, **kwargs):
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"""
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A decorator to specify one of the expected headers
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:param str name: the HTTP header name
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:param str description: a description about the header
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"""
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header = {"description": description}
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header.update(kwargs)
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return self.doc(headers={name: header})
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def produces(self, mimetypes):
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"""A decorator to specify the MIME types the API can produce"""
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return self.doc(produces=mimetypes)
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def deprecated(self, func):
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"""A decorator to mark a resource or a method as deprecated"""
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return self.doc(deprecated=True)(func)
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def vendor(self, *args, **kwargs):
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"""
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A decorator to expose vendor extensions.
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Extensions can be submitted as dict or kwargs.
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The ``x-`` prefix is optionnal and will be added if missing.
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See: http://swagger.io/specification/#specification-extensions-128
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"""
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for arg in args:
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kwargs.update(arg)
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return self.doc(vendor=kwargs)
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@property
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def payload(self):
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"""Store the input payload in the current request context"""
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return request.get_json()
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def unshortcut_params_description(data):
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if "params" in data:
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for name, description in six.iteritems(data["params"]):
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if isinstance(description, six.string_types):
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data["params"][name] = {"description": description}
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def handle_deprecations(doc):
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if "parser" in doc:
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warnings.warn(
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"The parser attribute is deprecated, use expect instead",
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DeprecationWarning,
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stacklevel=2,
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)
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doc["expect"] = doc.get("expect", []) + [doc.pop("parser")]
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if "body" in doc:
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warnings.warn(
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"The body attribute is deprecated, use expect instead",
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DeprecationWarning,
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stacklevel=2,
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)
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doc["expect"] = doc.get("expect", []) + [doc.pop("body")]
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