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import json
import logging
import dateutil.parser
from copy import deepcopy
from functools import wraps
from werkzeug.exceptions import Unauthorized
from flask import request, g, session, Response
from flask.ext.restful import Resource, reqparse
from pyaggr3g470r.lib.utils import default_handler
from pyaggr3g470r.models import User
logger = logging.getLogger(__name__)
def authenticate(func):
"""
Decorator for the authentication to the web services.
"""
@wraps(func)
def wrapper(*args, **kwargs):
logged_in = False
if not getattr(func, 'authenticated', True):
logged_in = True
# authentication based on the session (already logged on the site)
elif 'email' in session or g.user.is_authenticated():
logged_in = True
else:
# authentication via HTTP only
auth = request.authorization
user = User.query.filter(User.nickname == auth.username).first()
if user and user.check_password(auth.password) \
and user.activation_key == "":
g.user = user
logged_in = True
if logged_in:
return func(*args, **kwargs)
raise Unauthorized({'WWWAuthenticate': 'Basic realm="Login Required"'})
return wrapper
def to_response(func):
def wrapper(*args, **kwargs):
status_code = 200
result = func(*args, **kwargs)
if isinstance(result, Response):
return result
elif isinstance(result, tuple):
result, status_code = result
return Response(json.dumps(result, default=default_handler),
status=status_code)
return wrapper
class PyAggAbstractResource(Resource):
method_decorators = [authenticate, to_response]
attrs = {}
to_date = []
def __init__(self, *args, **kwargs):
super(PyAggAbstractResource, self).__init__(*args, **kwargs)
@property
def controller(self):
return self.controller_cls(getattr(g.user, 'id', None))
def reqparse_args(self, req=None, strict=False, default=True, args=None):
"""
strict: bool
if True will throw 400 error if args are defined and not in request
default: bool
if True, won't return defaults
"""
parser = reqparse.RequestParser()
for attr_name, attrs in (args or self.attrs).items():
if attrs.pop('force_default', False):
parser.add_argument(attr_name, location='json', **attrs)
elif not default and (not request.json
or request.json and attr_name not in request.json):
continue
else:
parser.add_argument(attr_name, location='json', **attrs)
parsed = parser.parse_args(strict=strict) if req is None \
else parser.parse_args(req, strict=strict)
for field in self.to_date:
if parsed.get(field):
try:
parsed[field] = dateutil.parser.parse(parsed[field])
except Exception:
logger.exception('failed to parse %r', parsed[field])
return parsed
class PyAggResourceNew(PyAggAbstractResource):
def post(self):
return self.controller.create(**self.reqparse_args()), 201
class PyAggResourceExisting(PyAggAbstractResource):
def get(self, obj_id=None):
return self.controller.get(id=obj_id)
def put(self, obj_id=None):
args = self.reqparse_args(default=False)
new_values = {key: args[key] for key in
set(args).intersection(self.attrs)}
self.controller.update({'id': obj_id}, new_values)
def delete(self, obj_id=None):
self.controller.delete(obj_id)
return None, 204
class PyAggResourceMulti(PyAggAbstractResource):
def get(self):
args = deepcopy(self.attrs)
args['limit'] = {'type': int, 'default': 10, 'force_default': True}
filters = self.reqparse_args(default=False, strict=False, args=args)
limit = filters.pop('limit', None)
if not limit:
return [res for res in self.controller.read(**filters).all()]
return [res for res in self.controller.read(**filters).limit(limit)]
def post(self):
status = 201
results = []
args = [] # FIXME
for arg in args:
try:
results.append(self.controller.create(**arg).id)
except Exception as error:
status = 206
results.append(error)
return results, status
def put(self):
status = 200
results = []
args = {} # FIXME
for obj_id, attrs in args.items():
try:
new_values = {key: args[key] for key in
set(attrs).intersection(self.editable_attrs)}
self.controller.update({'id': obj_id}, new_values)
results.append('ok')
except Exception as error:
status = 206
results.append(error)
return results, status
def delete(self):
status = 204
results = []
obj_ids = [] # FIXME extract some real ids
for obj_id in obj_ids:
try:
self.controller.delete(obj_id)
results.append('ok')
except Exception as error:
status = 206
results.append(error)
return results, status
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