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# Copyright (C) 2014 Linaro Ltd.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""The RequestHandler for /token URLs."""
import bson
from urlparse import urlunparse
from handlers.base import BaseHandler
from handlers.common import (
NOT_VALID_TOKEN,
TOKEN_VALID_KEYS,
get_query_fields,
valid_token_th,
validate_token,
)
from handlers.response import HandlerResponse
from models import (
ADMIN_KEY,
DELETE_KEY,
EMAIL_KEY,
EXPIRES_KEY,
GET_KEY,
IP_ADDRESS_KEY,
IP_RESTRICTED,
POST_KEY,
SUPERUSER_KEY,
TOKEN_COLLECTION,
TOKEN_KEY,
USERNAME_KEY,
)
from models.token import Token
from utils.db import (
delete,
find_one,
save,
update,
)
class TokenHandler(BaseHandler):
"""Handle the /token URLs."""
def __init__(self, application, request, **kwargs):
super(TokenHandler, self).__init__(application, request, **kwargs)
@property
def collection(self):
return self.db[TOKEN_COLLECTION]
@staticmethod
def _valid_keys(method):
return TOKEN_VALID_KEYS.get(method, None)
@staticmethod
def _token_validation_func():
return valid_token_th
def _token_validation(self, req_token, method, remote_ip, master_key):
valid_token = False
if all([master_key, req_token == master_key]):
valid_token = True
else:
token_obj = self._find_token(req_token, self.db)
if token_obj:
valid_token = validate_token(
token_obj,
method,
remote_ip,
self._token_validation_func()
)
return valid_token
def _get_one(self, doc_id):
# Overridden: with the token we do not search by _id, but
# by token field.
response = HandlerResponse()
response.result = None
result = find_one(
self.collection,
doc_id,
field=TOKEN_KEY,
fields=get_query_fields(self.get_query_arguments)
)
if result:
response.result = [result]
else:
response.status_code = 404
response.reason = "Resource '%s' not found" % doc_id
return response
def _post(self, *args, **kwargs):
response = None
if kwargs and kwargs.get('id', None):
self.log.info(
"Token update from IP address %s",
self.request.remote_ip
)
response = self._update_data(kwargs['id'], kwargs['json_obj'])
else:
self.log.info(
"New token creation from IP address %s",
self.request.remote_ip
)
response = self._new_data(kwargs['json_obj'])
return response
def _new_data(self, json_obj):
"""Create a new token in the DB.
:param json_obj: The JSON object with the paramters.
:return A `HandlerResponse` object.
"""
response = HandlerResponse(201)
response.result = None
try:
new_token = self._token_update_create(json_obj)
response.status_code, _ = save(self.db, new_token)
if response.status_code == 201:
response.result = {TOKEN_KEY: new_token.token}
location = urlunparse(
(
'http',
self.request.headers.get('Host'),
self.request.uri + '/' + new_token.token,
'', '', ''
)
)
response.headers = {'Location': location}
except KeyError:
response.status_code = 400
response.reason = (
"New tokens require the email address field [email]"
)
except (TypeError, ValueError):
response.status_code = 400
response.reason = "Wrong field value or type in the JSON data"
except Exception, ex:
response.status_code = 400
response.reason = str(ex)
return response
def _update_data(self, doc_id, json_obj):
"""Update an existing `Token` in the DB.
:param doc_id: The token string identifying the `Token` to update.
:param json_obj: The JSON object with the parameters.
:return A `HandlerResponse` objet.
"""
response = HandlerResponse()
response.result = None
try:
obj_id = bson.objectid.ObjectId(doc_id)
result = find_one(self.collection, [obj_id])
if result:
token = Token.from_json(result)
token = self._token_update_create(json_obj, token, fail=False)
response.status_code = update(
self.collection, {'_id': obj_id}, token.to_dict()
)
if response.status_code == 200:
response.result = {TOKEN_KEY: token.token}
else:
response.status_code = 404
except bson.errors.InvalidId, ex:
self.log.exception(ex)
self.log.error("Wrong ID '%s' value passed for object ID", doc_id)
response.status_code = 400
response.reason = "Wrong ID value provided"
except KeyError, ex:
self.log.exception(ex)
response.status_code = 400
response.reason = "Mandatory field missing"
except (TypeError, ValueError), ex:
self.log.exception(ex)
response.status_code = 400
response.reason = "Wrong field value or type in the JSON data"
except Exception, ex:
self.log.exception(ex)
response.status_code = 400
response.reason = str(ex)
return response
@staticmethod
def _token_update_create(json_obj, token=None, fail=True):
"""Create or update a `Token` object.
If the `token` argument is null, a new one will be created.
:param json_obj: The JSON object with the values to update.
:param token: The `Token` to update. Default to None meaning a new
token will be created.
param fail: If when a mandatory Token field is missing we should fail.
By default True, and it fails when the `email` field is missing.
:return A `Token`.
:raise KeyError, ValueError, TypeError, Exception.
"""
if not token:
token = Token()
if fail:
token.email = json_obj[EMAIL_KEY]
else:
if json_obj.get(EMAIL_KEY, None):
token.email = json_obj.get(EMAIL_KEY)
if json_obj.get(USERNAME_KEY, None):
token.username = json_obj.get(USERNAME_KEY)
if json_obj.get(EXPIRES_KEY, None):
token.expires_on = json_obj.get(EXPIRES_KEY)
if json_obj.get(GET_KEY, None):
token.is_get_token = json_obj.get(GET_KEY)
if json_obj.get(POST_KEY, None):
token.is_post_token = json_obj.get(POST_KEY)
if json_obj.get(DELETE_KEY, None):
token.is_delete_token = json_obj.get(DELETE_KEY)
if json_obj.get(SUPERUSER_KEY, None):
token.is_superuser = json_obj.get(SUPERUSER_KEY)
if json_obj.get(ADMIN_KEY, None):
token.is_admin = json_obj.get(ADMIN_KEY)
if json_obj.get(IP_RESTRICTED, None):
token.is_ip_restricted = json_obj.get(IP_RESTRICTED)
if token.is_ip_restricted and not json_obj.get(IP_ADDRESS_KEY, None):
raise Exception("IP restricted but no IP addresses given")
elif json_obj.get(IP_ADDRESS_KEY, None) and not token.is_ip_restricted:
raise Exception(
"IP addresses given, but token is not IP restricted"
)
elif token.is_ip_restricted and json_obj.get(IP_ADDRESS_KEY, None):
token.ip_address = json_obj.get(IP_ADDRESS_KEY)
return token
def execute_delete(self, *args, **kwargs):
"""Called by the actual DELETE method.
Make sure we have the correct value to execute a DELETE on the db,
and then call the method that does the real delete.
Subclasses should not override this unless there are special reasons
to.
"""
response = HandlerResponse(400)
if self.validate_req_token("DELETE"):
if kwargs and kwargs.get('id', None):
response.status_code = self._delete(kwargs['id'])
if response.status_code == 200:
response.reason = "Resource deleted"
else:
response.status_code = 403
response.reason = NOT_VALID_TOKEN
return response
def _delete(self, doc_id):
ret_val = 404
self.log.info("Token deletion from IP %s", self.request.remote_ip)
try:
doc_obj = bson.objectid.ObjectId(doc_id)
if find_one(self.collection, [doc_obj]):
ret_val = delete(self.collection, {"_id": {"$in": [doc_obj]}})
except bson.errors.InvalidId, ex:
self.log.exception(ex)
self.log.error("Wrong ID '%s' value passed as object ID", doc_id)
ret_val = 400
return ret_val
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