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import json
import logging
import dateutil.parser
from functools import wraps
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
from pyaggr3g470r.lib.exceptions import PyAggError
logger = logging.getLogger(__name__)
def authenticate(func):
"""
Decorator for the authentication to the web services.
"""
@wraps(func)
def wrapper(*args, **kwargs):
if not getattr(func, 'authenticated', True):
return func(*args, **kwargs)
# authentication based on the session (already logged on the site)
if 'email' in session or g.user.is_authenticated():
return func(*args, **kwargs)
# authentication via HTTP only
auth = request.authorization
try:
user = User.query.filter(User.nickname == auth.username).first()
if user and user.check_password(auth.password) \
and user.activation_key == "":
g.user = user
except Exception:
return Response('<Authentication required>', 401,
{'WWWAuthenticate':
'Basic realm="Login Required"'})
return func(*args, **kwargs)
return wrapper
def to_response(func):
def wrapper(*args, **kwargs):
status_code = 200
try:
result = func(*args, **kwargs)
except PyAggError as error:
return Response(json.dumps(error, default=default_handler),
status=status_code)
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, strict=False, default=True):
"""
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 self.attrs.items():
if not default and attr_name not in request.json:
continue
parser.add_argument(attr_name, location='json', **attrs)
parsed = parser.parse_args(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):
filters = self.reqparse_args(default=False)
return [res for res in self.controller.read(**filters).all()]
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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