class PricingServer(PricingBase, Server):
def server_init(self):
self.log = LogSinkClient(self.service_dir_client)
self.userstore_client = UserStoreClient(self.service_dir_client)
def price_request(self, requested_fib):
return int(floor(logarithm(requested_fib,10))) + 1
def pay_for_user_request(self, requested_fib, username):
request_cost = self.price_request(requested_fib)
credit = self.userstore_client.get_credit(username)
if credit < request_cost:
self.log.info(
'User "%s" denied fib(%s), credit: %s' % (
username,
requested_fib,
credit))
return [
False,
"Error: fib(%s) costs %s, user %s has insufficient credit(%s)" % (
requested_fib, request_cost, username, credit)]
new_credit = self.userstore_client.increment_credit(
username, -1 * request_cost)
self.log.info("%s used %s credit, balance: %s" % (
username, request_cost, new_credit))
return [True, new_credit]
class ControllerServer(ControllerBase, Server):
def server_init(self):
self.log = LogSinkClient(self.service_dir_client)
self.pricing_client = PricingClient(self.service_dir_client)
self.compute_worker_client = GenericClient(self.service_dir_client, name="compute_worker")
def parse_requested_fib(self, raw_requested_fib):
try:
return int(raw_requested_fib)
except ValueError, e:
self.log.warn('Request to %s resulted in %s' % (
raw_requested_fib, str(e)))
return None
class PricingServer(PricingBase, Server):
def server_init(self):
self.log = LogSinkClient(self.service_dir_client)
self.userstore_client = UserStoreClient(self.service_dir_client)
def price_request(self, requested_fib):
return int(floor(logarithm(requested_fib, 10))) + 1
def pay_for_user_request(self, requested_fib, username):
request_cost = self.price_request(requested_fib)
credit = self.userstore_client.get_credit(username)
if credit < request_cost:
self.log.info('User "%s" denied fib(%s), credit: %s' %
(username, requested_fib, credit))
return [
False,
"Error: fib(%s) costs %s, user %s has insufficient credit(%s)"
% (requested_fib, request_cost, username, credit)
]
new_credit = self.userstore_client.increment_credit(
username, -1 * request_cost)
self.log.info("%s used %s credit, balance: %s" %
(username, request_cost, new_credit))
return [True, new_credit]
class UserStoreServer(UserStoreBase, Server):
def server_init(self):
self.users = {}
self.credit = {}
self.log = LogSinkClient()
self._init_user_db()
def _add_user(self, user_dict, credit):
self.users[user_dict['username']] = user_dict
self.log.info("Added user: %s with credit %s" % (
str(user_dict), credit))
self.set_credit(user_dict['username'], credit)
def _init_user_db(self, filename=USER_DB_FILE):
raw_user_list = load_config(filename)['users']
for raw_user in raw_user_list:
username, password, credit = raw_user
self._add_user(
dict(username=username,
password=password),
credit)
def get_user(self, username=None):
return self.users.get(username, {})
def set_credit(self, username=None, credit=None):
if username is None or credit is None:
return False
self.credit[username] = credit
self.log.info("Credit for %s set to %s" % (
username, credit))
return True
def increment_credit(self, username=None, increment_by=0):
if username is None or username not in self.credit:
return False
self.credit[username] += increment_by
self.log.info("Credit for %s incremented %s yielding %s" % (
username, increment_by, self.credit[username]))
return self.credit[username]
def get_credit(self, username=None):
return self.credit.get(username)
class UserStoreServer(UserStoreBase, Server):
def server_init(self):
self.users = {}
self.credit = {}
self.log = LogSinkClient()
self._init_user_db()
def _add_user(self, user_dict, credit):
self.users[user_dict['username']] = user_dict
self.log.info("Added user: %s with credit %s" %
(str(user_dict), credit))
self.set_credit(user_dict['username'], credit)
def _init_user_db(self, filename=USER_DB_FILE):
raw_user_list = load_config(filename)['users']
for raw_user in raw_user_list:
username, password, credit = raw_user
self._add_user(dict(username=username, password=password), credit)
def get_user(self, username=None):
return self.users.get(username, {})
def set_credit(self, username=None, credit=None):
if username is None or credit is None:
return False
self.credit[username] = credit
self.log.info("Credit for %s set to %s" % (username, credit))
return True
def increment_credit(self, username=None, increment_by=0):
if username is None or username not in self.credit:
return False
self.credit[username] += increment_by
self.log.info("Credit for %s incremented %s yielding %s" %
(username, increment_by, self.credit[username]))
return self.credit[username]
def get_credit(self, username=None):
return self.credit.get(username)
def server_init(self):
self.log = LogSinkClient(self.service_dir_client)
self.userstore_client = UserStoreClient(self.service_dir_client)
def server_init(self):
self.log = LogSinkClient(self.service_dir_client)
self.pricing_client = PricingClient(self.service_dir_client)
self.compute_worker_client = GenericClient(self.service_dir_client, name="compute_worker")
def server_init(self):
self.log = LogSinkClient(self.service_dir_client)
self.userstore_client = UserStoreClient(self.service_dir_client)
def server_init(self):
self.log = LogSinkClient(self.service_dir_client)
self.userstore_client = UserStoreClient(self.service_dir_client)
self.controller_client = GenericClient(self.service_dir_client, name="controller")
self.basic_auth = HTTPBasic(self.wsgi_app_post_auth, self.userstore_client)
class GatekeeperServer(Server):
NAME = "gatekeeper"
def server_init(self):
self.log = LogSinkClient(self.service_dir_client)
self.userstore_client = UserStoreClient(self.service_dir_client)
self.controller_client = GenericClient(self.service_dir_client, name="controller")
self.basic_auth = HTTPBasic(self.wsgi_app_post_auth, self.userstore_client)
def get_requested_fib(self, environ):
# parse integer fibonacci sequence index
return environ['PATH_INFO'][1:]
def set_custom_environment(self, query_dict):
if "environment" in query_dict:
# environments set in the request should be
# stored in request_meta, not server_meta.
# Storing environment in request_meta will
# propagate it to other services as well.
environment = query_dict['environment'][-1]
get_request_meta()['environment'] = environment
self.log.info('Using custom environment: %s' % environment)
return environment
def set_custom_endpoints(self, query_dict):
# custom enpoint information travels on in request_meta
custom_endpoints = {}
for key in query_dict.keys():
if key.startswith(ENDPOINT_OVERRIDE_PREFIX):
endpoint = key[(len(ENDPOINT_OVERRIDE_PREFIX)):]
custom_endpoints[endpoint] = query_dict[key][-1]
if custom_endpoints:
get_request_meta()['custom_endpoints'] = custom_endpoints
self.log.info('Using custom endpoints: %s' % str(custom_endpoints))
return custom_endpoints
def parse_request(self, environ):
query_dict = parse_qs(environ['QUERY_STRING'])
self.set_custom_environment(query_dict)
self.set_custom_endpoints(query_dict)
return self.get_requested_fib(environ)
def wsgi_app_post_auth(self, environ, start_response):
username = environ.get('REMOTE_USER', None)
if username is not None:
raw_requested_fib = self.parse_request(environ)
status, body = self.controller_client.generate_response(
raw_requested_fib=raw_requested_fib,
username=username)
else:
status, body = ["401 UNAUTHENTICATED", "Please log in"]
return http_response(start_response, status, body)
def wsgi_app(self, environ, start_response):
self.set_environment(self.environment)
self.set_server_name(self.name)
set_new_request_id()
response = self.basic_auth(environ, start_response)
# clear request meta
set_request_meta({})
return response
def server_init(self):
self.users = {}
self.credit = {}
self.log = LogSinkClient()
self._init_user_db()
def server_init(self):
self.users = {}
self.credit = {}
self.log = LogSinkClient()
self._init_user_db()
