scrapy 没有通过链接爬行

Question

我通过链接提取器使用scrapy进行爬行，我在scrapy链接提取器中使用了正确的XPath表达式，但我不知道为什么它会无限并打印某种源代码而不是餐厅的名称和地址.我知道我的限制 XPath 表达式中有一些错误，但无法弄清楚它是什么

代码：

import scrapy
from scrapy.linkextractors import LinkExtractor
from scrapy.spiders import CrawlSpider, Rule


class TripadSpider(CrawlSpider):
    name = 'tripad'
    allowed_domains = ['www.tripadvisor.in']
    start_urls = ['https://www.tripadvisor.in/Restaurants-g304551-New_Delhi_National_Capital_Territory_of_Delhi.html']

    rules = (
        Rule(LinkExtractor(restrict_xpaths='//div[@class="OhCyu"]//a'), callback='parse_item', follow=True),
    )

    def parse_item(self, response):
        yield {
            'title': response.xpath('//h1[@class="fHibz"]/text()').get(),
            'Address': response.xpath('(//a[@class="fhGHT"])[2]').get()
        }

Answer 1

它正在爬行，尝试更改您的 user_agent。但是您忘记在地址中添加/text()。

from scrapy.linkextractors import LinkExtractor
from scrapy.spiders import CrawlSpider, Rule


class TripadSpider(CrawlSpider):
    name = 'tripad'
    allowed_domains = ['tripadvisor.in']
    start_urls = ['https://www.tripadvisor.in/Restaurants-g304551-New_Delhi_National_Capital_Territory_of_Delhi.html']

    rules = (
        Rule(LinkExtractor(restrict_xpaths='//div[@class="OhCyu"]//a'), callback='parse_item'),
        Rule(LinkExtractor(restrict_xpaths='//a[contains(@class, "next")]')),   # pagination
    )

    def parse_item(self, response):
        yield {
            'title': response.xpath('//h1[@class="fHibz"]/text()').get(),
            'Address': response.xpath('(//a[@class="fhGHT"])[2]/text()').get()
        }

输出：

{'title': 'Mosaic', 'Address': 'Sector 10 Lobby Level Crowne Plaza Twin District Centre, Rohini, New Delhi 110085 India'}
{'title': 'Spring', 'Address': 'Plot 4, Dwarka City Centre Radisson Blu, Sector 13, New Delhi 110075 India'}
{'title': 'Dilli 32', 'Address': 'Maharaja Surajmal Road The Leela Ambience Convention Hotel, Near Yamuna Sports Complex, Vivek Vihar, New Delhi 110002 India'}
{'title': 'Viva - All Day Dining', 'Address': 'Hospitality District Asset Area 12 Gurgoan sector 28, New Delhi 110037 India'}
...
...
...