mirror of https://github.com/scrapy/scrapy.git
72 lines
1.4 KiB
ReStructuredText
72 lines
1.4 KiB
ReStructuredText
.. _topics-exceptions:
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==========
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Exceptions
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==========
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.. module:: scrapy.core.exceptions
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:synopsis: Core exceptions
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.. _topics-exceptions-ref:
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Built-in Exceptions reference
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=============================
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Here's a list of all exceptions included in Scrapy and their usage.
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DontCloseDomain
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---------------
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.. exception:: DontCloseDomain
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This exception can be raised by any handler of the :signal:`domain_idle` signal
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to avoid the domain from being closed at this time, and wait for the next idle
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state.
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DropItem
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--------
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.. exception:: DropItem
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The exception that must be raised by item pipeline stages to stop processing an
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Item. For more information see :ref:`topics-item-pipeline`.
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HttpException
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-------------
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.. exception:: HttpException
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This exception is raised by the downloader when a non-200 response has been
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downloaded.
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IgnoreRequest
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-------------
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.. exception:: IgnoreRequest
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This exception can be raised by the Scheduler or any downlaoder middleware to
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indicate that the request should be ignored.
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NotConfigured
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-------------
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.. exception:: NotConfigured
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This exception can be raised by some components to indicate that they will
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remain disabled. Those component include:
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* Extensions
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* Item pipelines
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* Downloader middlwares
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* Spider middlewares
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The exception must be raised in the component constructor.
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NotSupported
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------------
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.. exception:: NotSupported
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This exception is raised to indicate an unsupported feature.
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