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# SPDX-License-Identifier: AGPL-3.0-or-later
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"""Exception types raised by SearXNG modules.
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"""
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from typing import Optional, Union
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class SearxException(Exception):
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"""Base SearXNG exception."""
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class SearxParameterException(SearxException):
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"""Raised when query miss a required parameter"""
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def __init__(self, name, value):
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if value == '' or value is None:
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message = 'Empty ' + name + ' parameter'
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else:
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message = 'Invalid value "' + value + '" for parameter ' + name
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super().__init__(message)
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self.message = message
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self.parameter_name = name
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self.parameter_value = value
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class SearxSettingsException(SearxException):
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"""Error while loading the settings"""
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def __init__(self, message: Union[str, Exception], filename: Optional[str]):
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super().__init__(message)
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self.message = message
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self.filename = filename
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class SearxEngineException(SearxException):
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"""Error inside an engine"""
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class SearxXPathSyntaxException(SearxEngineException):
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"""Syntax error in a XPATH"""
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def __init__(self, xpath_spec, message):
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super().__init__(str(xpath_spec) + " " + message)
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self.message = message
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# str(xpath_spec) to deal with str and XPath instance
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self.xpath_str = str(xpath_spec)
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class SearxEngineResponseException(SearxEngineException):
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"""Impossible to parse the result of an engine"""
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class SearxEngineAPIException(SearxEngineResponseException):
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"""The website has returned an application error"""
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class SearxEngineAccessDeniedException(SearxEngineResponseException):
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"""The website is blocking the access"""
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SUSPEND_TIME_SETTING = "search.suspended_times.SearxEngineAccessDenied"
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"""This settings contains the default suspended time (default 86400 sec / 1
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day)."""
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def __init__(self, suspended_time: int = None, message: str = 'Access denied'):
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"""Generic exception to raise when an engine denies access to the results.
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:param suspended_time: How long the engine is going to be suspended in
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second. Defaults to None.
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:type suspended_time: int, None
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:param message: Internal message. Defaults to ``Access denied``
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:type message: str
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"""
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suspended_time = suspended_time or self._get_default_suspended_time()
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super().__init__(message + ', suspended_time=' + str(suspended_time))
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self.suspended_time = suspended_time
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self.message = message
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def _get_default_suspended_time(self):
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from searx import get_setting # pylint: disable=C0415
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return get_setting(self.SUSPEND_TIME_SETTING)
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class SearxEngineCaptchaException(SearxEngineAccessDeniedException):
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"""The website has returned a CAPTCHA."""
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SUSPEND_TIME_SETTING = "search.suspended_times.SearxEngineCaptcha"
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"""This settings contains the default suspended time (default 86400 sec / 1
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day)."""
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def __init__(self, suspended_time=None, message='CAPTCHA'):
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super().__init__(message=message, suspended_time=suspended_time)
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class SearxEngineTooManyRequestsException(SearxEngineAccessDeniedException):
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"""The website has returned a Too Many Request status code
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By default, searx stops sending requests to this engine for 1 hour.
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"""
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SUSPEND_TIME_SETTING = "search.suspended_times.SearxEngineTooManyRequests"
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"""This settings contains the default suspended time (default 3660 sec / 1
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hour)."""
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def __init__(self, suspended_time=None, message='Too many request'):
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super().__init__(message=message, suspended_time=suspended_time)
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class SearxEngineXPathException(SearxEngineResponseException):
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"""Error while getting the result of an XPath expression"""
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def __init__(self, xpath_spec, message):
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super().__init__(str(xpath_spec) + " " + message)
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self.message = message
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# str(xpath_spec) to deal with str and XPath instance
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self.xpath_str = str(xpath_spec)
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