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# coding: utf-8
import json
import logging
import traceback
import functools
import leancloud
from werkzeug.wrappers import Request
from werkzeug.wrappers import Response
from werkzeug.routing import Map
from werkzeug.routing import Rule
from werkzeug.exceptions import HTTPException
from werkzeug.exceptions import NotFound
from werkzeug.exceptions import NotAcceptable
from . import context
__author__ = 'asaka <lan@leancloud.rocks>'
logger = logging.getLogger('leancloud.cloudcode.cloudcode')
user = context.local('user')
class LeanEngineError(Exception):
def __init__(self, code=1, message='error'):
self.code = code
self.message = message
class LeanEngineApplication(object):
def __init__(self):
self.url_map = Map([
Rule('/__engine/1/functions/<func_name>', endpoint='cloud_function'),
Rule('/__engine/1.1/functions/<func_name>', endpoint='cloud_function'),
Rule('/__engine/1/functions/<class_name>/<hook_name>', endpoint='cloud_hook'),
Rule('/__engine/1.1/functions/<class_name>/<hook_name>', endpoint='cloud_hook'),
Rule('/__engine/1/onVerified/<verify_type>', endpoint='on_verified'),
Rule('/__engine/1.1/onVerified/<verify_type>', endpoint='on_verified'),
Rule('/__engine/1.1/functions/_User/onLogin', endpoint='on_login'),
Rule('/__engine/1/functions/_ops/metadatas', endpoint='ops_meta_data'),
Rule('/__engine/1.1/functions/_ops/metadatas', endpoint='ops_meta_data'),
Rule('/1/functions/<func_name>', endpoint='cloud_function'),
Rule('/1.1/functions/<func_name>', endpoint='cloud_function'),
Rule('/1/functions/<class_name>/<hook_name>', endpoint='cloud_hook'),
Rule('/1.1/functions/<class_name>/<hook_name>', endpoint='cloud_hook'),
Rule('/1/onVerified/<verify_type>', endpoint='on_verified'),
Rule('/1.1/onVerified/<verify_type>', endpoint='on_verified'),
Rule('/1.1/functions/_User/onLogin', endpoint='on_login'),
Rule('/1/functions/_ops/metadatas', endpoint='ops_meta_data'),
Rule('/1.1/functions/_ops/metadatas', endpoint='ops_meta_data'),
])
def __call__(self, environ, start_response):
self.process_session(environ)
request = Request(environ)
response = self.dispatch_request(request)
return response(environ, start_response)
@classmethod
def process_session(cls, environ):
if environ['_app_params']['session_token'] in (None, ''):
context.local.user = None
return
session_token = environ['_app_params']['session_token']
user = leancloud.Object.create('_User', session_token=session_token)
context.local.user = user
def dispatch_request(self, request):
adapter = self.url_map.bind_to_environ(request.environ)
try:
endpoint, values = adapter.match()
except HTTPException, e:
return e
params = request.get_data()
values['params'] = json.loads(params) if params != '' else {}
try:
if endpoint == 'cloud_function':
result = dispatch_cloud_func(**values)
elif endpoint == 'cloud_hook':
result = dispatch_cloud_hook(**values)
elif endpoint == 'on_verified':
result = dispatch_on_verified(**values)
elif endpoint == 'on_login':
result = dispatch_on_login(**values)
elif endpoint == 'ops_meta_data':
result = dispatch_ops_meta_data()
else:
raise ValueError # impossible
return Response(json.dumps({'result': result}), mimetype='application/json')
except LeanEngineError, e:
return Response(
json.dumps({'code': e.code, 'error': e.message}),
status=400,
mimetype='application/json'
)
except Exception:
print traceback.format_exc()
return Response(
json.dumps({'code': 141, 'error': 'Cloud Code script had an error.'}),
status=500,
mimetype='application/json'
)
hook_name_mapping = {
'beforeSave': '__before_save_for_',
'afterSave': '__after_save_for_',
'afterUpdate': '__after_update_for_',
'beforeDelete': '__before_save_for_',
'afterDelete': '__after_delete_for_',
}
_cloud_codes = {}
def register_cloud_func(func):
func_name = func.__name__
if func_name in _cloud_codes:
raise RuntimeError('cloud function: {0} is already registered'.format(func_name))
_cloud_codes[func_name] = func
def dispatch_cloud_func(func_name, params):
func = _cloud_codes.get(func_name)
if not func:
raise LeanEngineError(code=404, message="cloud func named '{0}' not found.".format(func_name))
logger.info("{0} is called!".format(func_name))
return func(**params)
def register_cloud_hook(class_name, hook_name):
# hack the hook name
hook_name = hook_name_mapping[hook_name] + class_name
if hook_name in _cloud_codes:
raise RuntimeError('cloud hook {0} on class {1} is already registered'.format(hook_name, class_name))
def new_func(func):
_cloud_codes[hook_name] = func
return new_func
before_save = functools.partial(register_cloud_hook, hook_name='beforeSave')
after_save = functools.partial(register_cloud_hook, hook_name='afterSave')
after_update = functools.partial(register_cloud_hook, hook_name='afterUpdate')
before_delete = functools.partial(register_cloud_hook, hook_name='beforeDelete')
after_delete = functools.partial(register_cloud_hook, hook_name='afterDelete')
def dispatch_cloud_hook(class_name, hook_name, params):
hook_name = hook_name_mapping[hook_name] + class_name
if hook_name not in _cloud_codes:
raise NotAcceptable
obj = leancloud.Object.create(class_name)
obj._finish_fetch(params['object'], True)
logger.info("{0}:{1} is called!".format(class_name, hook_name))
func = _cloud_codes[hook_name]
if not func:
raise leancloud.LeanEngineError(code=404, message="cloud hook named '{0}' not found.".format(hook_name))
return func(obj)
def register_on_verified(verify_type):
if verify_type not in set(['sms', 'email']):
raise RuntimeError('verify_type must be sms or email')
func_name = '__on_verified_{0}'.format(verify_type)
def new_func(func):
if func_name in _cloud_codes:
raise RuntimeError('on verified is already registered')
_cloud_codes[func_name] = func
return new_func
def dispatch_on_verified(verify_type, user):
func = _cloud_codes.get(verify_type)
if not func:
return
return func(user)
def register_on_login(func):
func_name = '__on_login'
if func_name in _cloud_codes:
raise RuntimeError('on login is already registered')
_cloud_codes[func_name] = func
def dispatch_on_login(user):
func = _cloud_codes.get('__on_login')
if not func:
return
return func(user)
def dispatch_ops_meta_data():
return _cloud_codes.keys()