如何阻止蜘蛛进入管道？

Question

@Sjaak Trekhaak has a 'hack' here How do I stop all spiders and the engine immediately after a condition in a pipeline is met? that can potentially stop the spiders by setting a flag in pipeline, and then call CloseSpider in the parser method. However I have the following code in pipeline (where pdate and lastseen are well defined datetime):

class StopSpiderPipeline(object):
    def process_item(self, item, spider):                                       
        if pdate < lastseen:
            spider.close_down = True 

and in spider

def parse_item(self, response):                                             
    if self.close_down:                                                     
        raise CloseSpider(reason='Already scraped')     

I got error exceptions.AttributeError: 'SyncSpider' object has no attribute 'close_down' , where did I get wrong? the question was actually asked by @anicake but was not responded. Thanks,

Answer 1

Is your spider's close_down attribute create? Because it looks like it doesn't.

Try changing your check to if "close_down" in self.__dict__: or adding self.close_down = False in your spider's __init__() method.