爬虫爬取糗事百科

最新推荐文章于 2021-09-08 23:47:14 发布

原创最新推荐文章于 2021-09-08 23:47:14 发布 · 198 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#爬虫

爬虫专栏收录该内容

7 篇文章

订阅专栏

直接上代码

spiders

class ExampleSpider(Spider):

    name = 'qiushi'
    
    def __init__(self):
        self.lit = []
    def start_requests(self):
        url_str = "https://www.qiushibaike.com/text/page/3/"
        yield Request(url=url_str,callback=self.parse,meta={"page":"0"},dont_filter=True)

    def parse(self, response):
        a = re.search("page",response.url)
        url_strs =response.url
        self.lit.append(url_strs)
        content_block = response.xpath('//div[@class="article block untagged mb15 typs_hot"]')
        for i in content_block:
            url = i.xpath('//a[@class="contentHerf"]/@href').extract()
            for j in url:
                url_str = urljoin('https://www.qiushibaike.com',j)

                yield Request(url=url_str,callback=self.parse_detail,meta={"page":"0"})

        if a:
            yield Request(url=self.lit[0],callback=self.parse,meta={'page':"2"},dont_filter=True)
            self.lit = []
    def parse_detail(self,response):

        author = response.xpath('//div[@class="author clearfix"]/a[2]/h2/text()').extract()
        content = response.xpath('//*[@id="single-next-link"]/div/text()').extract()
        haoxiao_num = response.xpath('//div[@class="stats"]/span[@class="stats-vote"]/i/text()').extract()
        pinglun_num = response.xpath('//div[@class="stats"]/span[@class="stats-comments"]/i/text()').extract()
        item = QiushibaikeItem()
        item["author"] = "".join(author)
        item["content"] = "".join(content)
        item["haoxiao_num"] = "".join(haoxiao_num)
        item["pinglun_num"] = "".join(pinglun_num)
        yield item

items:

import scrapy
class QiushibaikeItem(scrapy.Item):
    author = scrapy.Field()
    content = scrapy.Field()
    haoxiao_num = scrapy.Field()
    pinglun_num = scrapy.Field()

中间件

from selenium import webdriver
from selenium.webdriver.firefox.options import Options as FOptions
import time
from scrapy.http import HtmlResponse

import re
class SeleniumMiddlewares(object):

    def __init__(self):
        self.options = FOptions()
        #self.options.add_argument("-headless")
        self.browser = webdriver.Firefox(executable_path="/home/hello/Downloads/geckodriver",firefox_options=self.options)

    def process_request(self,request,spider):

        if int(request.meta["page"]) >0:
            self.browser.get(request.url)
            self.browser.execute_script("window.scrollTo(0,document.body.scrollHeight)")
            time.sleep(1)
            button = self.browser.find_element_by_xpath('//span[@class="next"]')
            button.click()
            time.sleep(2)
        else:
            self.browser.get(request.url)
            time.sleep(2)
        return HtmlResponse(url=self.browser.current_url, body=self.browser.page_source, encoding="utf-8",
                                request=request)

pipelines

import sqlite3

class QiushibaikePipeline(object):

    def __init__(self):
        self.conn = sqlite3.connect("qiushibaike.db")
        self.cursor = self.conn.cursor()
        self.cursor.execute("create table IF NOT EXISTS qiushi(author varchar(200),content varchar(500),haoxiao_num varchar(100),pinglun_num varchar(100))")

    def process_item(self, item, spider):
        self.cursor.execute("insert into qiushi values('%s','%s','%s','%s')"%(item["author"],item["content"],item["haoxiao_num"],item["pinglun_num"]))
        self.conn.commit()
        return item