def open(self, spider):
'''把调度队列和 Spider 绑定'''
self.spider = spider
self.queue = self.queue_cls(self.server, spider, self.queue_key)
self.df = RFPDupeFilter(self.server,
self.dupefilter_key % {'spider': spider.name})
if self.idle_before_close < 0:
self.idle_before_close = 0
# notice if there are requests already in the queue to resume the crawl
if len(self.queue):
spider.log("Resuming crawl (%d requests scheduled)" %
len(self.queue),
level=log.INFO)
