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剛開始使用scrapy,我試圖通過整個數據庫一頁一頁地做一個通用的搜索引擎,並抓住某些我需要的鏈接,但我得到這個錯誤當我嘗試去下一頁。不完全確定如何去下一頁,會感謝任何幫助正確的方法!Scrapy抓取多個頁面錯誤過濾重複
這是我的代碼:(?)
class TestSpider(scrapy.Spider):
name = "PLC"
allowed_domains = ["exploit-db.com"]
start_urls = [
"https://www.exploit-db.com/local/"
]
def parse(self, response):
filename = response.url.split("/")[-2] + '.html'
links = response.xpath('//tr/td[5]/a/@href').extract()
description = response.xpath('//tr/td[5]/a[@href]/text()').extract()
for data, link in zip(description, links):
if "PLC" in data:
with open(filename, "a") as f:
f.write(data+'\n')
f.write(link+'\n\n')
f.close()
else:
pass
next_page = response.xpath('//div[@class="pagination"][1]//a/@href').extract()
if next_page:
url = response.urljoin(next_page[0])
yield scrapy.Request(url, callback=self.parse)
但我在控制檯上收到此錯誤
2016-06-08 16:05:21 [scrapy] INFO: Enabled item pipelines:
[]
2016-06-08 16:05:21 [scrapy] INFO: Spider opened
2016-06-08 16:05:21 [scrapy] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2016-06-08 16:05:21 [scrapy] DEBUG: Telnet console listening on 127.0.0.1:6023
2016-06-08 16:05:22 [scrapy] DEBUG: Crawled (200) <GET https://www.exploit-db.com/robots.txt> (referer: None)
2016-06-08 16:05:22 [scrapy] DEBUG: Crawled (200) <GET https://www.exploit-db.com/local/> (referer: None)
2016-06-08 16:05:23 [scrapy] DEBUG: Crawled (200) <GET https://www.exploit-db.com/local/?order_by=date&order=desc&pg=2> (referer: https://www.exploit-db.com/local/)
2016-06-08 16:05:23 [scrapy] DEBUG: Crawled (200) <GET https://www.exploit-db.com/local/?order_by=date&order=desc&pg=1> (referer: https://www.exploit-db.com/local/?order_by=date&order=desc&pg=2)
2016-06-08 16:05:23 [scrapy] DEBUG: Filtered duplicate request: <GET https://www.exploit-db.com/local/?order_by=date&order=desc&pg=2> - no more duplicates will be shown (see DUPEFILTER_DEBUG to show all duplicates)
2016-06-08 16:05:23 [scrapy] INFO: Closing spider (finished)
2016-06-08 16:05:23 [scrapy] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 1162,
'downloader/request_count': 4,
'downloader/request_method_count/GET': 4,
'downloader/response_bytes': 40695,
'downloader/response_count': 4,
'downloader/response_status_count/200': 4,
'dupefilter/filtered': 1,
'finish_reason': 'finished',
'finish_time': datetime.datetime(2016, 6, 8, 8, 5, 23, 514161),
'log_count/DEBUG': 6,
'log_count/INFO': 7,
'request_depth_max': 3,
'response_received_count': 4,
'scheduler/dequeued': 3,
'scheduler/dequeued/memory': 3,
'scheduler/enqueued': 3,
'scheduler/enqueued/memory': 3,
'start_time': datetime.datetime(2016, 6, 8, 8, 5, 21, 561678)}
2016-06-08 16:05:23 [scrapy] INFO: Spider closed (finished)
無法檢索下一個頁面,很想解釋爲什麼TT