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crawlers ​

简介：基于scrapy的爬虫项目，主要是做着玩，并探索scrapy~ github

一些参数： ​

1. 深度优先

DEPTH_PRIORITY = 0
SCHEDULER_DISK_QUEUE = 'scrapy.squeues.PickleLifoDiskQueue'
SCHEDULER_MEMORY_QUEUE = 'scrapy.squeues.LifoMemoryQueue'

2. 广度优先

DEPTH_PRIORITY = 1
SCHEDULER_DISK_QUEUE = 'scrapy.squeues.PickleFifoDiskQueue'
SCHEDULER_MEMORY_QUEUE = 'scrapy.squeues.FifoMemoryQueue'

3. AutoThrottle extension

AUTOTHROTTLE_ENABLED = True AUTOTHROTTLE_START_DELAY = 0
AUTOTHROTTLE_MAX_DELAY = 60
AUTOTHROTTLE_TARGET_CONCURRENCY = 10.0
AUTOTHROTTLE_DEBUG = False
DOWNLOAD_DELAY = 0.1