You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
86 lines
3.1 KiB
86 lines
3.1 KiB
from flask import request
|
|
from flask.views import MethodView
|
|
|
|
|
|
from .model import ModelBase
|
|
|
|
from .utils import unpack, BaseResponse
|
|
|
|
|
|
class Resource(MethodView):
|
|
"""
|
|
Represents an abstract RESTX resource.
|
|
|
|
Concrete resources should extend from this class
|
|
and expose methods for each supported HTTP method.
|
|
If a resource is invoked with an unsupported HTTP method,
|
|
the API will return a response with status 405 Method Not Allowed.
|
|
Otherwise the appropriate method is called and passed all arguments
|
|
from the url rule used when adding the resource to an Api instance.
|
|
See :meth:`~flask_restx.Api.add_resource` for details.
|
|
"""
|
|
|
|
representations = None
|
|
method_decorators = []
|
|
|
|
def __init__(self, api=None, *args, **kwargs):
|
|
self.api = api
|
|
|
|
def dispatch_request(self, *args, **kwargs):
|
|
# Taken from flask
|
|
meth = getattr(self, request.method.lower(), None)
|
|
if meth is None and request.method == "HEAD":
|
|
meth = getattr(self, "get", None)
|
|
assert meth is not None, "Unimplemented method %r" % request.method
|
|
|
|
for decorator in self.method_decorators:
|
|
meth = decorator(meth)
|
|
|
|
self.validate_payload(meth)
|
|
|
|
resp = meth(*args, **kwargs)
|
|
|
|
if isinstance(resp, BaseResponse):
|
|
return resp
|
|
|
|
representations = self.representations or {}
|
|
|
|
mediatype = request.accept_mimetypes.best_match(representations, default=None)
|
|
if mediatype in representations:
|
|
data, code, headers = unpack(resp)
|
|
resp = representations[mediatype](data, code, headers)
|
|
resp.headers["Content-Type"] = mediatype
|
|
return resp
|
|
|
|
return resp
|
|
|
|
def __validate_payload(self, expect, collection=False):
|
|
"""
|
|
:param ModelBase expect: the expected model for the input payload
|
|
:param bool collection: False if a single object of a resource is
|
|
expected, True if a collection of objects of a resource is expected.
|
|
"""
|
|
# TODO: proper content negotiation
|
|
data = request.get_json()
|
|
if collection:
|
|
data = data if isinstance(data, list) else [data]
|
|
for obj in data:
|
|
expect.validate(obj, self.api.refresolver, self.api.format_checker)
|
|
else:
|
|
expect.validate(data, self.api.refresolver, self.api.format_checker)
|
|
|
|
def validate_payload(self, func):
|
|
"""Perform a payload validation on expected model if necessary"""
|
|
if getattr(func, "__apidoc__", False) is not False:
|
|
doc = func.__apidoc__
|
|
validate = doc.get("validate", None)
|
|
validate = validate if validate is not None else self.api._validate
|
|
if validate:
|
|
for expect in doc.get("expect", []):
|
|
# TODO: handle third party handlers
|
|
if isinstance(expect, list) and len(expect) == 1:
|
|
if isinstance(expect[0], ModelBase):
|
|
self.__validate_payload(expect[0], collection=True)
|
|
if isinstance(expect, ModelBase):
|
|
self.__validate_payload(expect, collection=False)
|