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A spider may wish to have all responses available in the cache, for future use with "Cache-Control: max-stale", for instance. The DummyPolicy caches all responses but never revalidates them, and sometimes a more nuanced policy is desirable. This setting still respects "Cache-Control: no-store" directives in responses. If you don't want that, filter "no-store" out of the Cache-Control headers in responses you feed to the cache middleware.
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Scrapy
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.. image:: https://img.shields.io/pypi/v/Scrapy.svg
:target: https://pypi.python.org/pypi/Scrapy
:alt: PyPI Version
.. image:: https://img.shields.io/travis/scrapy/scrapy/master.svg
:target: http://travis-ci.org/scrapy/scrapy
:alt: Build Status
.. image:: https://img.shields.io/badge/wheel-yes-brightgreen.svg
:target: https://pypi.python.org/pypi/Scrapy
:alt: Wheel Status
Overview
========
Scrapy is a fast high-level web crawling and web scraping framework, used to
crawl websites and extract structured data from their pages. It can be used for
a wide range of purposes, from data mining to monitoring and automated testing.
For more information including a list of features check the Scrapy homepage at:
http://scrapy.org
Requirements
============
* Python 2.7
* Works on Linux, Windows, Mac OSX, BSD
Install
=======
The quick way::
pip install scrapy
For more details see the install section in the documentation:
http://doc.scrapy.org/en/latest/intro/install.html
Releases
========
You can download the latest stable and development releases from:
http://scrapy.org/download/
Documentation
=============
Documentation is available online at http://doc.scrapy.org/ and in the ``docs``
directory.
Community (blog, twitter, mail list, IRC)
=========================================
See http://scrapy.org/community/
Contributing
============
See http://doc.scrapy.org/en/master/contributing.html
Companies using Scrapy
======================
See http://scrapy.org/companies/
Commercial Support
==================
See http://scrapy.org/support/