相同的代码适用于不同的网站,但不适用于此网站!
网站= http://quotes.toscrape.com/
它不会出现任何错误并且成功地破解8页(或计数页面) 进口scrapy
count = 8
class QuotesSpiderSpider(scrapy.Spider):
name = 'quotes_spider'
allowed_domains = ['quotes.toscrape.com']
start_urls = ['http://quotes.toscrape.com/']
def parse(self, response):
quotes = response.xpath('//*[@class="quote"]')
for quote in quotes:
text = quote.xpath('.//*[@class="text"]/text()').extract_first()
author = quote.xpath('.//*[@class="author"]/text()').extract_first()
yield{
'Text' : text,
'Author' : author
}
global count
count = count - 1
if(count > 0):
next_page = response.xpath('//*[@class="next"]/a/@href').extract_first()
absolute_next_page = response.urljoin(next_page)
yield scrapy.Request(absolute_next_page)
但它只抓取此网站的第一页
网站https://www.goodreads.com/list/show/7
# -*- coding: utf-8 -*-
import scrapy
count = 5
class BooksSpider(scrapy.Spider):
name = 'books'
allowed_domains = ["goodreads.com/list/show/7"]
start_urls = ["https://goodreads.com/list/show/7/"]
def parse(self, response):
books = response.xpath('//tr/td[3]')
for book in books:
bookTitle = book.xpath('.//*[@class="bookTitle"]/span/text()').extract_first()
authorName = book.xpath('.//*[@class="authorName"]/span/text()').extract_first()
yield{
'BookTitle' : bookTitle,
'AuthorName' : authorName
}
global count
count = count - 1
if (count > 0):
next_page_url = response.xpath('//*[@class="pagination"]/a[@class="next_page"]/@href').extract_first()
absolute_next_page_url = response.urljoin(next_page_url)
yield scrapy.Request(url = absolute_next_page_url)
我想抓取某些有限的网页或第二个网站的所有网页。
答案 0 :(得分:1)
您正在allowed_domains
使用包含路径的域。
allowed_domains = ["goodreads.com/list/show/7"]
应该是
allowed_domains = ["goodreads.com"]