scrapy爬http返回503 Service Unavailablec错误
问题：scrapy shell 请求页面时返回503 Service Unavailablec错误2018-07-08 15:30:23 [scrapy.downloadermiddlewares.retry] DEBUG: Gave up retrying <GET http://www.xicidaili.com/nn/2> (failed 3 times): 503 Servi...
