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"""For a given resources, classes in the module intend to create the following
routes :
GET resource/<id>
-> to retrieve one
POST resource
-> to create one
PUT resource/<id>
-> to update one
DELETE resource/<id>
-> to delete one
GET resources
-> to retrieve several
POST resources
-> to create several
PUT resources
-> to update several
DELETE resources
-> to delete several
"""
import ast
import logging
from functools import wraps
from werkzeug.exceptions import Unauthorized, BadRequest, Forbidden, NotFound
from flask import request
from flask.ext.restful import Resource, reqparse
from flask.ext.login import current_user
from web.views.common import admin_permission, api_permission, \
login_user_bundle, jsonify
from web.controllers import UserController
logger = logging.getLogger(__name__)
def authenticate(func):
@wraps(func)
def wrapper(*args, **kwargs):
if request.authorization:
ucontr = UserController()
try:
user = ucontr.get(nickname=request.authorization.username)
except NotFound:
raise Forbidden("Couldn't authenticate your user")
if not ucontr.check_password(user, request.authorization.password):
raise Forbidden("Couldn't authenticate your user")
if not user.is_active:
raise Forbidden("User is desactivated")
login_user_bundle(user)
if current_user.is_authenticated:
return func(*args, **kwargs)
raise Unauthorized()
return wrapper
class PyAggAbstractResource(Resource):
method_decorators = [authenticate, jsonify]
controller_cls = None
attrs = None
@property
def controller(self):
if admin_permission.can():
return self.controller_cls()
return self.controller_cls(current_user.id)
def reqparse_args(self, right, req=None, strict=False, default=True,
allow_empty=False):
"""
strict: bool
if True will throw 400 error if args are defined and not in request
default: bool
if True, won't return defaults
args: dict
the args to parse, if None, self.attrs will be used
"""
try:
if req:
in_values = req.json
else:
in_values = request.args or request.json or {}
if not in_values and allow_empty:
return {}
except BadRequest:
if allow_empty:
return {}
raise
parser = reqparse.RequestParser()
if self.attrs is not None:
attrs = self.attrs
elif admin_permission.can():
attrs = self.controller_cls._get_attrs_desc('admin')
elif api_permission.can():
attrs = self.controller_cls._get_attrs_desc('api', right)
else:
attrs = self.controller_cls._get_attrs_desc('base', right)
assert attrs, "No defined attrs for %s" % self.__class__.__name__
for attr_name, attr in attrs.items():
if not default and attr_name not in in_values:
continue
else:
parser.add_argument(attr_name, location='json',
default=in_values[attr_name])
return parser.parse_args(req=request.args, strict=strict)
class PyAggResourceNew(PyAggAbstractResource):
@api_permission.require(http_exception=403)
def post(self):
"""Create a single new object"""
return self.controller.create(**self.reqparse_args(right='write')), 201
class PyAggResourceExisting(PyAggAbstractResource):
def get(self, obj_id=None):
"""Retreive a single object"""
return self.controller.get(id=obj_id)
def put(self, obj_id=None):
"""update an object, new attrs should be passed in the payload"""
args = self.reqparse_args(right='write', default=False)
if not args:
raise BadRequest()
return self.controller.update({'id': obj_id}, args), 200
def delete(self, obj_id=None):
"""delete a object"""
self.controller.delete(obj_id)
return None, 204
class PyAggResourceMulti(PyAggAbstractResource):
def get(self):
"""retrieve several objects. filters can be set in the payload on the
different fields of the object, and a limit can be set in there as well
"""
args = {}
try:
limit = request.json.pop('limit', 10)
order_by = request.json.pop('order_by', None)
except Exception:
args = self.reqparse_args(right='read', default=False)
limit = request.args.get('limit', 10)
order_by = request.args.get('order_by', None)
query = self.controller.read(**args)
if order_by:
query = query.order_by(order_by)
if limit:
query = query.limit(limit)
return [res for res in query]
@api_permission.require(http_exception=403)
def post(self):
"""creating several objects. payload should be:
>>> payload
[{attr1: val1, attr2: val2}, {attr1: val1, attr2: val2}]
"""
status, fail_count, results = 200, 0, []
class Proxy:
pass
for attrs in request.json:
try:
Proxy.json = attrs
args = self.reqparse_args('write', req=Proxy, default=False)
obj = self.controller.create(**args)
results.append(obj)
except Exception as error:
fail_count += 1
results.append(str(error))
if fail_count == len(results): # all failed => 500
status = 500
elif fail_count: # some failed => 206
status = 206
return results, status
def put(self):
"""updating several objects. payload should be:
>>> payload
[[obj_id1, {attr1: val1, attr2: val2}]
[obj_id2, {attr1: val1, attr2: val2}]]
"""
status, results = 200, []
class Proxy:
pass
for obj_id, attrs in request.json:
try:
Proxy.json = attrs
args = self.reqparse_args('write', req=Proxy, default=False)
result = self.controller.update({'id': obj_id}, args)
if result:
results.append('ok')
else:
results.append('nok')
except Exception as error:
results.append(str(error))
if results.count('ok') == 0: # all failed => 500
status = 500
elif results.count('ok') != len(results): # some failed => 206
status = 206
return results, status
def delete(self):
"""will delete several objects,
a list of their ids should be in the payload"""
status, results = 204, []
for obj_id in request.json:
try:
self.controller.delete(obj_id)
results.append('ok')
except Exception as error:
status = 206
results.append(error)
# if no operation succeded, it's not partial anymore, returning err 500
if status == 206 and results.count('ok') == 0:
status = 500
return results, status
|
