searxng/searx/metrics/error_recorder.py
Alexandre Flament c27fef1cde [mod] metrics: add secondary parameter
Some error won't stop the engine:
* additional HTTP redirects for example
* some invalid results

secondary=True allows to flag these errors as not important.
2021-04-21 16:24:46 +02:00

145 lines
5.5 KiB
Python

import typing
import inspect
from json import JSONDecodeError
from urllib.parse import urlparse
from httpx import HTTPError, HTTPStatusError
from searx.exceptions import (SearxXPathSyntaxException, SearxEngineXPathException, SearxEngineAPIException,
SearxEngineAccessDeniedException)
from searx import logger
errors_per_engines = {}
class ErrorContext:
__slots__ = ('filename', 'function', 'line_no', 'code', 'exception_classname',
'log_message', 'log_parameters', 'secondary')
def __init__(self, filename, function, line_no, code, exception_classname, log_message, log_parameters, secondary):
self.filename = filename
self.function = function
self.line_no = line_no
self.code = code
self.exception_classname = exception_classname
self.log_message = log_message
self.log_parameters = log_parameters
self.secondary = secondary
def __eq__(self, o) -> bool:
if not isinstance(o, ErrorContext):
return False
return self.filename == o.filename and self.function == o.function and self.line_no == o.line_no\
and self.code == o.code and self.exception_classname == o.exception_classname\
and self.log_message == o.log_message and self.log_parameters == o.log_parameters \
and self.secondary == o.secondary
def __hash__(self):
return hash((self.filename, self.function, self.line_no, self.code, self.exception_classname, self.log_message,
self.log_parameters, self.secondary))
def __repr__(self):
return "ErrorContext({!r}, {!r}, {!r}, {!r}, {!r}, {!r}) {!r}".\
format(self.filename, self.line_no, self.code, self.exception_classname, self.log_message,
self.log_parameters, self.secondary)
def add_error_context(engine_name: str, error_context: ErrorContext) -> None:
errors_for_engine = errors_per_engines.setdefault(engine_name, {})
errors_for_engine[error_context] = errors_for_engine.get(error_context, 0) + 1
logger.debug('%s: %s', engine_name, str(error_context))
def get_trace(traces):
for trace in reversed(traces):
split_filename = trace.filename.split('/')
if '/'.join(split_filename[-3:-1]) == 'searx/engines':
return trace
if '/'.join(split_filename[-4:-1]) == 'searx/search/processors':
return trace
return traces[-1]
def get_hostname(exc: HTTPError) -> typing.Optional[None]:
url = exc.request.url
if url is None and exc.response is not None:
url = exc.response.url
return urlparse(url).netloc
def get_request_exception_messages(exc: HTTPError)\
-> typing.Tuple[typing.Optional[str], typing.Optional[str], typing.Optional[str]]:
url = None
status_code = None
reason = None
hostname = None
if hasattr(exc, 'request') and exc.request is not None:
url = exc.request.url
if url is None and hasattr(exc, 'response') and exc.respones is not None:
url = exc.response.url
if url is not None:
hostname = url.host
if isinstance(exc, HTTPStatusError):
status_code = str(exc.response.status_code)
reason = exc.response.reason_phrase
return (status_code, reason, hostname)
def get_messages(exc, filename) -> typing.Tuple:
if isinstance(exc, JSONDecodeError):
return (exc.msg, )
if isinstance(exc, TypeError):
return (str(exc), )
if isinstance(exc, ValueError) and 'lxml' in filename:
return (str(exc), )
if isinstance(exc, HTTPError):
return get_request_exception_messages(exc)
if isinstance(exc, SearxXPathSyntaxException):
return (exc.xpath_str, exc.message)
if isinstance(exc, SearxEngineXPathException):
return (exc.xpath_str, exc.message)
if isinstance(exc, SearxEngineAPIException):
return (str(exc.args[0]), )
if isinstance(exc, SearxEngineAccessDeniedException):
return (exc.message, )
return ()
def get_exception_classname(exc: Exception) -> str:
exc_class = exc.__class__
exc_name = exc_class.__qualname__
exc_module = exc_class.__module__
if exc_module is None or exc_module == str.__class__.__module__:
return exc_name
return exc_module + '.' + exc_name
def get_error_context(framerecords, exception_classname, log_message, log_parameters, secondary) -> ErrorContext:
searx_frame = get_trace(framerecords)
filename = searx_frame.filename
function = searx_frame.function
line_no = searx_frame.lineno
code = searx_frame.code_context[0].strip()
del framerecords
return ErrorContext(filename, function, line_no, code, exception_classname, log_message, log_parameters, secondary)
def count_exception(engine_name: str, exc: Exception, secondary: bool = False) -> None:
framerecords = inspect.trace()
try:
exception_classname = get_exception_classname(exc)
log_parameters = get_messages(exc, framerecords[-1][1])
error_context = get_error_context(framerecords, exception_classname, None, log_parameters, secondary)
add_error_context(engine_name, error_context)
finally:
del framerecords
def count_error(engine_name: str, log_message: str, log_parameters: typing.Optional[typing.Tuple] = None,
secondary: bool = False) -> None:
framerecords = list(reversed(inspect.stack()[1:]))
try:
error_context = get_error_context(framerecords, None, log_message, log_parameters or (), secondary)
add_error_context(engine_name, error_context)
finally:
del framerecords