是的，这是可能的。
- 下面的代码在
failed_urls
基本Spider类中添加了一个列表，并在URL的响应状态为404时将URL附加到该列表中（需要扩展此范围以涵盖其他错误状态）。 - 接下来，我添加了一个将列表连接到单个字符串中的句柄，并在关闭蜘蛛时将其添加到spider的统计信息中。
- 根据你的评论，可以跟踪扭曲的错误，下面的一些答案提供了有关如何处理特定用例的示例。
- 该代码已更新为可与Scrapy 1.8一起使用。所有这一切都要感谢Juliano Mendieta，因为我所做的只是添加他建议的编辑并确认spider是否按预期工作。
from scrapy import Spider, signalsclass MySpider(Spider): handle_httpstatus_list = [404] name = "myspider" allowed_domains = ["example.com"] start_urls = [ 'http://www.example.com/thisurlexists.html', 'http://www.example.com/thisurldoesnotexist.html', 'http://www.example.com/neitherdoesthisone.html' ] def __init__(self, *args, **kwargs): super().__init__(*args, **kwargs) self.failed_urls = [] @classmethod def from_crawler(cls, crawler, *args, **kwargs): spider = super(MySpider, cls).from_crawler(crawler, *args, **kwargs) crawler.signals.connect(spider.handle_spider_closed, signals.spider_closed) return spider def parse(self, response): if response.status == 404: self.crawler.stats.inc_value('failed_url_count') self.failed_urls.append(response.url) def handle_spider_closed(self, reason): self.crawler.stats.set_value('failed_urls', ', '.join(self.failed_urls)) def process_exception(self, response, exception, spider): ex_class = "%s.%s" % (exception.__class__.__module__, exception.__class__.__name__) self.crawler.stats.inc_value('downloader/exception_count', spider=spider) self.crawler.stats.inc_value('downloader/exception_type_count/%s' % ex_class, spider=spider)输出示例（请注意，仅当实际抛出异常时才会显示downloader / exception_count *统计信息-我在关闭无线适配器后尝试运行Spider来模拟它们）：
2012-12-10 11:15:26+0000 [myspider] INFO: Dumping Scrapy stats: {'downloader/exception_count': 15, 'downloader/exception_type_count/twisted.internet.error.DNSLookupError': 15, 'downloader/request_bytes': 717, 'downloader/request_count': 3, 'downloader/request_method_count/GET': 3, 'downloader/response_bytes': 15209, 'downloader/response_count': 3, 'downloader/response_status_count/200': 1, 'downloader/response_status_count/404': 2, 'failed_url_count': 2, 'failed_urls': 'http://www.example.com/thisurldoesnotexist.html, http://www.example.com/neitherdoesthisone.html' 'finish_reason': 'finished', 'finish_time': datetime.datetime(2012, 12, 10, 11, 15, 26, 874000), 'log_count/DEBUG': 9, 'log_count/ERROR': 2, 'log_count/INFO': 4, 'response_received_count': 3, 'scheduler/dequeued': 3, 'scheduler/dequeued/memory': 3, 'scheduler/enqueued': 3, 'scheduler/enqueued/memory': 3, 'spider_exceptions/NameError': 2, 'start_time': datetime.datetime(2012, 12, 10, 11, 15, 26, 560000)}
