Improved logging for requests, responses and events.
- The following logging namespaces are now used, to make it easier to filter only log lines related to the logged application message: - `platypush:events` - `platypush:requests` - `platypush:responses` - Those messages are always logged as JSON, with no prefixes nor suffixes. - Requests are always logged when executed - no more delegation to the upstream backend. - Responses are always logged when fully populated (including `id`, `origin`, `target` etc.), instead of being logged when still partially populated. This makes it particularly easy to link request/response IDs directly from the logs.
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D90FBA7F76362774
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@ -21,20 +21,18 @@ def execute_route():
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try:
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msg = json.loads(request.data.decode('utf-8'))
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except Exception as e:
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logger().error(
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'Unable to parse JSON from request {}: {}'.format(request.data, str(e))
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)
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logger().error('Unable to parse JSON from request %s: %s', request.data, e)
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abort(400, str(e))
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logger().info('Received message on the HTTP backend: {}'.format(msg))
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logger().debug(
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'Received message on the HTTP backend from %s: %s', request.remote_addr, msg
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)
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try:
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response = send_message(msg)
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return Response(str(response or {}), mimetype='application/json')
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except Exception as e:
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logger().error(
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'Error while running HTTP action: {}. Request: {}'.format(str(e), msg)
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)
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logger().error('Error while running HTTP action: %s. Request: %s', e, msg)
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abort(500, str(e))
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@ -57,6 +57,7 @@ class Event(Message):
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self.type = f'{self.__class__.__module__}.{self.__class__.__name__}'
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self.args = kwargs
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self.disable_web_clients_notification = disable_web_clients_notification
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self._logger = logging.getLogger('platypush:events')
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for arg, value in self.args.items():
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if arg not in [
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@ -57,6 +57,7 @@ class Request(Message):
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self.args = args if args else {}
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self.backend = backend
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self.token = token
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self._logger = logging.getLogger('platypush:requests')
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@classmethod
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def build(cls, msg):
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@ -77,16 +78,11 @@ class Request(Message):
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@staticmethod
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def _generate_id():
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_id = ''
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for _ in range(0, 16):
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_id += '%.2x' % random.randint(0, 255)
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return _id
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return ''.join(f'{random.randint(0, 255):02x}' for _ in range(0, 16))
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def _execute_procedure(self, *args, **kwargs):
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from platypush.config import Config
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from platypush.procedure import Procedure
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logger.info('Executing procedure request: {}'.format(self.action))
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procedures = Config.get_procedures()
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proc_name = '.'.join(self.action.split('.')[1:])
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if proc_name not in procedures:
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@ -120,7 +116,7 @@ class Request(Message):
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constants = Config.get_constants()
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context['constants'] = {}
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for (name, value) in constants.items():
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for name, value in constants.items():
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context['constants'][name] = value
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keys = []
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@ -143,23 +139,20 @@ class Request(Message):
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@classmethod
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def expand_value_from_context(cls, _value, **context):
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for (k, v) in context.items():
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for k, v in context.items():
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if isinstance(v, Message):
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v = json.loads(str(v))
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try:
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exec('{}={}'.format(k, v))
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except Exception as e:
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logger.debug(str(e))
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except Exception:
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if isinstance(v, str):
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try:
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exec('{}="{}"'.format(k, re.sub(r'(^|[^\\])"', '\1\\"', v)))
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except Exception as e:
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except Exception as e2:
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logger.debug(
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'Could not set context variable {}={}: {}'.format(
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k, v, str(e)
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)
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'Could not set context variable %s=%s: %s', k, v, e2
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)
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logger.debug('Context: {}'.format(context))
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logger.debug('Context: %s', context)
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parsed_value = ''
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if not isinstance(_value, str):
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@ -205,6 +198,7 @@ class Request(Message):
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response.id = self.id
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response.target = self.origin
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response.origin = Config.get('device_id')
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response.log()
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if self.backend and self.origin:
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self.backend.send_response(response=response, request=self)
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@ -235,6 +229,7 @@ class Request(Message):
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from platypush.plugins import RunnablePlugin
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response = None
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self.log()
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try:
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if self.action.startswith('procedure.'):
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@ -243,25 +238,20 @@ class Request(Message):
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if response is not None:
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self._send_response(response)
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return response
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# utils.get_context is a special action that simply returns the current context
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elif self.action == 'utils.get_context':
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if self.action == 'utils.get_context':
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response = Response(output=context)
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self._send_response(response)
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return response
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else:
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action = self.expand_value_from_context(self.action, **context)
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(module_name, method_name) = get_module_and_method_from_action(
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action
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)
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plugin = get_plugin(module_name)
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assert plugin, f'No such plugin: {module_name}'
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action = self.expand_value_from_context(self.action, **context)
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(module_name, method_name) = get_module_and_method_from_action(action)
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plugin = get_plugin(module_name)
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assert plugin, f'No such plugin: {module_name}'
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except Exception as e:
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logger.exception(e)
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msg = 'Uncaught pre-processing exception from action [{}]: {}'.format(
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self.action, str(e)
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)
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logger.warning(msg)
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response = Response(output=None, errors=[msg])
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response = Response(output=None, errors=[str(e)])
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self._send_response(response)
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return response
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@ -276,41 +266,23 @@ class Request(Message):
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else:
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response = plugin.run(method_name, args)
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if not response:
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logger.warning(
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'Received null response from action {}'.format(action)
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)
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else:
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if response.is_error():
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logger.warning(
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(
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'Response processed with errors from ' + 'action {}: {}'
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).format(action, str(response))
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)
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else:
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response.log(action)
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if response is None:
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response = Response()
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except (AssertionError, TimeoutError) as e:
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logger.warning(
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'%s from action [%s]: %s', e.__class__.__name__, action, str(e)
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'%s from action [%s]: %s', e.__class__.__name__, action, e
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)
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response = Response(output=None, errors=[str(e)])
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except Exception as e:
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# Retry mechanism
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plugin.logger.exception(e)
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logger.warning(
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(
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'Uncaught exception while processing response '
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+ 'from action [{}]: {}'
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).format(action, str(e))
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)
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errors = errors or []
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if str(e) not in errors:
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errors.append(str(e))
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response = Response(output=None, errors=errors)
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if _n_tries - 1 > 0:
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logger.info('Reloading plugin {} and retrying'.format(module_name))
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logger.info('Reloading plugin %s and retrying', module_name)
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plugin = get_plugin(module_name, reload=True)
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if isinstance(plugin, RunnablePlugin):
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plugin.bus = get_bus()
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@ -37,6 +37,7 @@ class Response(Message):
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self.errors = self._parse_msg(errors or [])
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self.origin = origin
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self.id = id
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self._logger = logging.getLogger('platypush:responses')
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def is_error(self):
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"""Returns True if the response has errors"""
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@ -98,14 +99,9 @@ class Response(Message):
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return json.dumps(response_dict, cls=self.Encoder)
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def log(self, action=None):
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prefix = (
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f'Processed response from action {action}: '
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if action
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else 'Received response: '
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)
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super().log(prefix)
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def log(self, *args, **kwargs):
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self.logging_level = logging.WARNING if self.is_error() else logging.INFO
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super().log(*args, **kwargs)
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# vim:sw=4:ts=4:et:
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