python - 'scrapy' 的网页抓取抓取了 0 个页面和项目

Question

我正在从一个站点设置代理捕获器，但我什么也没得到。

import scrapy
from scrapy.item import Field, Item
from scrapy.spiders import CrawlSpider, Rule
from scrapy.linkextractors import LinkExtractor
from scrapy.loader import ItemLoader
from scrapy.loader.processors import MapCompose

class ProxyServersPro(Item):
    ip = scrapy.Field()
    port = scrapy.Field()
    country = scrapy.Field()
    speed = scrapy.Field()
    protocol = scrapy.Field()
    anon = scrapy.Field()

class ProxyServersPro(CrawlSpider):
    name = "ProxyServersProCrawler"
    start_urls = ["https://es.proxyservers.pro/proxy/list/speed/2/anonymity/elite/order/duration/order_dir/asc/page/1"]
    allowed_domains = ['proxyservers.pro']

    rules = {
        Rule(LinkExtractor(allow=r'page'), callback = 'parse_item')
        }

def parse_item(self, response):
    item = ItemLoader (ProxyServersPro(), response=response)
    item.add_xpath('ip', '//*[@id="content-content"]/div/div/div[1]/table/tbody/tr[1]/td[2]/a/text()')
    item.add_xpath('port', '//html/body/div[1]/div/div[2]/div/div/div/div[1]/table/tbody/tr[1]/td[3]/span/text()')
    item.add_xpath('country', '//html/body/div[1]/div/div[2]/div/div/div/div[1]/table/tbody/tr[1]/td[4]/text()')
    item.add_xpath('speed', '//html/body/div[1]/div/div[2]/div/div/div/div[1]/table/tbody/tr[1]/td[5]/div[1]/div/div/text()')
    item.add_xpath('protocol', '//html/body/div[1]/div/div[2]/div/div/div/div[1]/table/tbody/tr[1]/td[7]/text()')
    item.add_xpath('anon', '//html/body/div[1]/div/div[2]/div/div/div/div[1]/table/tbody/tr[1]/td[8]/text()')
    return item.load_item()

这就是控制台所说的。

2019-03-24 04:53:27 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)

有人能弄清楚发生了什么事吗？谢谢

Answer 1

这是工作示例代码，请查看

# -*- coding: utf-8 -*-
from scrapy import Selector
from scrapy.http import Request, FormRequest, HtmlResponse
from scrapy.spiders import CrawlSpider
from scrapy.conf import settings
import urllib
import json
import re
from urllib.parse import urljoin
from html.parser import HTMLParser
from requests import Session

from scrapy import Item, Field


class ProxyServersPro(Item):
    ip = Field()
    port = Field()
    country = Field()
    speed = Field()
    protocol = Field()
    anon = Field()
    port = Field()
class ProxyServers(CrawlSpider):
    name = "ProxyServersProCrawler"

    allowed_domains = ['proxyservers.pro']
    headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36',
        'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
        'Accept-Language': 'en-US,en;q=0.5',
        'Accept-Encoding': 'gzip, deflate',
        'Connection': 'keep-alive'
    }
    start_url = ['https://es.proxyservers.pro/proxy/list/speed/2/anonymity/elite/order/duration/order_dir/asc/page/1', 'https://es.proxyservers.pro/proxy/list/speed/2/anonymity/elite/order/duration/order_dir/asc/page/2', 'https://es.proxyservers.pro/proxy/list/speed/2/anonymity/elite/order/duration/order_dir/asc/page/3', 'https://es.proxyservers.pro/proxy/list/speed/2/anonymity/elite/order/duration/order_dir/asc/page/4', 'https://es.proxyservers.pro/proxy/list/speed/2/anonymity/elite/order/duration/order_dir/asc/page/5']

    def __init__(self):
        super(ProxyServers, self).__init__()

    def start_requests(self):
        for url in self.start_url:
            yield Request(url, callback=self.parse_companies, headers=self.headers)


    def parse_companies(self, response):
        table = response.xpath('//table[@class="table table-hover"]/tbody/tr')
        for data in table:
            ip = data.xpath('./td[2]/a/text()').extract_first()
            country = data.xpath('./td[4]/text()').extract_first()
            protocol = data.xpath('./td[7]/text()').extract_first()
            anon = data.xpath('./td[8]/text()').extract_first()
            port = data.xpath('./td[3]/text()').extract_first()

            item = ProxyServersPro()
            item['ip'] = ip
            item['country'] = country
            item['protocol'] = protocol
            item['anon'] = anon
            item['port'] = port
            yield item

而且端口和速度不在网站内容中，它是立即加载的，我们无法通过 xpath 获取。