mirror of https://github.com/scrapy/scrapy.git
47 lines
1.8 KiB
Python
47 lines
1.8 KiB
Python
"""
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Extension for collecting core stats like items scraped and start/finish times
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"""
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from datetime import datetime
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from scrapy import signals
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class CoreStats:
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def __init__(self, stats):
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self.stats = stats
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self.start_time = None
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@classmethod
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def from_crawler(cls, crawler):
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o = cls(crawler.stats)
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crawler.signals.connect(o.spider_opened, signal=signals.spider_opened)
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crawler.signals.connect(o.spider_closed, signal=signals.spider_closed)
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crawler.signals.connect(o.item_scraped, signal=signals.item_scraped)
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crawler.signals.connect(o.item_dropped, signal=signals.item_dropped)
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crawler.signals.connect(o.response_received, signal=signals.response_received)
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return o
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def spider_opened(self, spider):
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self.start_time = datetime.utcnow()
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self.stats.set_value('start_time', self.start_time, spider=spider)
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def spider_closed(self, spider, reason):
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finish_time = datetime.utcnow()
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elapsed_time = finish_time - self.start_time
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elapsed_time_seconds = elapsed_time.total_seconds()
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self.stats.set_value('elapsed_time_seconds', elapsed_time_seconds, spider=spider)
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self.stats.set_value('finish_time', finish_time, spider=spider)
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self.stats.set_value('finish_reason', reason, spider=spider)
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def item_scraped(self, item, spider):
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self.stats.inc_value('item_scraped_count', spider=spider)
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def response_received(self, spider):
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self.stats.inc_value('response_received_count', spider=spider)
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def item_dropped(self, item, spider, exception):
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reason = exception.__class__.__name__
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self.stats.inc_value('item_dropped_count', spider=spider)
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self.stats.inc_value('item_dropped_reasons_count/%s' % reason, spider=spider)
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