[英]Simple Scrapy crawler not following links & scraping
基本上問題在於鏈接
我將從第1..2..3..4..5 .....頁共90頁
每頁有100個左右的鏈接
每頁都是這種格式
http://www.consumercomplaints.in/lastcompanieslist/page/1
http://www.consumercomplaints.in/lastcompanieslist/page/2
http://www.consumercomplaints.in/lastcompanieslist/page/3
http://www.consumercomplaints.in/lastcompanieslist/page/4
這是正則表達式匹配規則
Rule(LinkExtractor(allow='(http:\/\/www\.consumercomplaints\.in\/lastcompanieslist\/page\/\d+)'),follow=True,callback="parse_data")
我要轉到每個頁面,然后創建一個Request
對象以刮取每個頁面中的所有鏈接
Scrapy每次總共僅抓取179個鏈接,然后給出finished
狀態
我究竟做錯了什么?
import scrapy
from scrapy.spiders import CrawlSpider, Rule
from scrapy.linkextractors import LinkExtractor
import urlparse
class consumercomplaints_spider(CrawlSpider):
name = "test_complaints"
allowed_domains = ["www.consumercomplaints.in"]
protocol='http://'
start_urls = [
"http://www.consumercomplaints.in/lastcompanieslist/"
]
#These are the rules for matching the domain links using a regularexpression, only matched links are crawled
rules = [
Rule(LinkExtractor(allow='(http:\/\/www\.consumercomplaints\.in\/lastcompanieslist\/page\/\d+)'),follow=True,callback="parse_data")
]
def parse_data(self, response):
#Get All the links in the page using xpath selector
all_page_links = response.xpath('//td[@class="compl-text"]/a/@href').extract()
#Convert each Relative page link to Absolute page link -> /abc.html -> www.domain.com/abc.html and then send Request object
for relative_link in all_page_links:
print "relative link procesed:"+relative_link
absolute_link = urlparse.urljoin(self.protocol+self.allowed_domains[0],relative_link.strip())
request = scrapy.Request(absolute_link,
callback=self.parse_complaint_page)
return request
return {}
def parse_complaint_page(self,response):
print "SCRAPED"+response.url
return {}
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