scrapy-redis 0.7.3

Redis-based components for Scrapy.

Scrapy-Redis

Redis-based components for Scrapy.

• Usage: https://github.com/rmax/scrapy-redis/wiki/Usage

• Documentation: https://github.com/rmax/scrapy-redis/wiki.

• Release: https://github.com/rmax/scrapy-redis/wiki/History

• Contribution: https://github.com/rmax/scrapy-redis/wiki/Getting-Started

• LICENSE: MIT license

Features

• Distributed crawling/scraping

  You can start multiple spider instances that share a single redis queue. Best suitable for broad multi-domain crawls.

• Distributed post-processing

  Scraped items gets pushed into a redis queued meaning that you can start as many as needed post-processing processes sharing the items queue.

• Scrapy plug-and-play components

  Scheduler + Duplication Filter, Item Pipeline, Base Spiders.

• In this forked version: added json supported data in Redis

  data contains url, `meta` and other optional parameters. meta is a nested json which contains sub-data. this function extract this data and send another FormRequest with url, meta and addition formdata.

  For example:

  { "url": "https://exaple.com", "meta": {"job-id":"123xsd", "start-date":"dd/mm/yy"}, "url_cookie_key":"fertxsas" }

  this data can be accessed in scrapy spider through response. like: request.url, request.meta, request.cookies

Note

This features cover the basic case of distributing the workload across multiple workers. If you need more features like URL expiration, advanced URL prioritization, etc., we suggest you to take a look at the Frontera project.

Requirements

• Python 3.7+

• Redis >= 5.0

• Scrapy >= 2.0

• redis-py >= 4.0

Installation

From pip

pip install scrapy-redis

From GitHub

git clone https://github.com/darkrho/scrapy-redis.git
cd scrapy-redis
python setup.py install

Note

For using this json supported data feature, please make sure you have not installed the scrapy-redis through pip. If you already did it, you first uninstall that one.

pip uninstall scrapy-redis

Alternative Choice

Frontera is a web crawling framework consisting of crawl frontier, and distribution/scaling primitives, allowing to build a large scale online web crawler.

History

0.7.3 (2022-07-21)

• Move docs to GitHub Wiki

• Update tox and support dynamic tests

• Update support for json data

• Refactor max idle time

• Add support for python3.7~python3.10

• Deprecate python2.x support

0.7.2 (2021-12-27)

• Fix RedisStatsCollector._get_key()

• Fix redis-py dependency version

• Added maximum idle waiting time MAX_IDLE_TIME_BEFORE_CLOSE

0.7.1 (2021-03-27)

• Fixes datetime parse error for redis-py 3.x.

• Add support for stats extensions.

0.7.1-rc1 (2021-03-27)

• Fixes datetime parse error for redis-py 3.x.

0.7.1-b1 (2021-03-22)

• Add support for stats extensions.

0.7.0-dev (unreleased)

• Unreleased.

0.6.8 (2017-02-14)

• Fixed automated release due to not matching registered email.

0.6.7 (2016-12-27)

• Fixes bad formatting in logging message.

0.6.6 (2016-12-20)

• Fixes wrong message on dupefilter duplicates.

0.6.5 (2016-12-19)

• Fixed typo in default settings.

0.6.4 (2016-12-18)

• Fixed data decoding in Python 3.x.

• Added REDIS_ENCODING setting (default utf-8).

• Default to CONCURRENT_REQUESTS value for REDIS_START_URLS_BATCH_SIZE.

• Renamed queue classes to a proper naming conventiong (backwards compatible).

0.6.3 (2016-07-03)

• Added REDIS_START_URLS_KEY setting.

• Fixed spider method from_crawler signature.

0.6.2 (2016-06-26)

• Support redis_cls parameter in REDIS_PARAMS setting.

• Python 3.x compatibility fixed.

• Added SCHEDULER_SERIALIZER setting.

0.6.1 (2016-06-25)

• Backwards incompatible change: Require explicit DUPEFILTER_CLASS setting.

• Added SCHEDULER_FLUSH_ON_START setting.

• Added REDIS_START_URLS_AS_SET setting.

• Added REDIS_ITEMS_KEY setting.

• Added REDIS_ITEMS_SERIALIZER setting.

• Added REDIS_PARAMS setting.

• Added REDIS_START_URLS_BATCH_SIZE spider attribute to read start urls in batches.

• Added RedisCrawlSpider.

0.6.0 (2015-07-05)

• Updated code to be compatible with Scrapy 1.0.

• Added -a domain=… option for example spiders.

0.5.0 (2013-09-02)

• Added REDIS_URL setting to support Redis connection string.

• Added SCHEDULER_IDLE_BEFORE_CLOSE setting to prevent the spider closing too quickly when the queue is empty. Default value is zero keeping the previous behavior.

• Schedule preemptively requests on item scraped.

• This version is the latest release compatible with Scrapy 0.24.x.

0.4.0 (2013-04-19)

• Added RedisSpider and RedisMixin classes as building blocks for spiders to be fed through a redis queue.

• Added redis queue stats.

• Let the encoder handle the item as it comes instead converting it to a dict.

0.3.0 (2013-02-18)

• Added support for different queue classes.

• Changed requests serialization from marshal to cPickle.

0.2.0 (2013-02-17)

• Improved backward compatibility.

• Added example project.

0.1.0 (2011-09-01)

• First release on PyPI.