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'''
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searx is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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searx is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with searx. If not, see < http://www.gnu.org/licenses/ >.
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(C) 2017- by Alexandre Flament, <alex@al-f.net>
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'''
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from typing import Optional, Union
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class SearxException(Exception):
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pass
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class SearxParameterException(SearxException):
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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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def __init__(self, suspended_time=24 * 3600, message='Access denied'):
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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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class SearxEngineCaptchaException(SearxEngineAccessDeniedException):
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"""The website has returned a CAPTCHA
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By default, searx stops sending requests to this engine for 1 day.
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"""
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def __init__(self, suspended_time=24 * 3600, 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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def __init__(self, suspended_time=3600, 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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