使用scrapy-crawlSpider 爬取tencent 招聘

Tencent 招聘信息网站

 1. 起始url  start_url = 'https://hr.tencent.com/position.php'

在起始页面,需要获取该也页面上的每个职位的详情页的url,同时需要提取下一页的url地址,做同样的操作。

因此起始页url地址的提取,分为两类:

  1. 每个职位详情页的url地址的提取

  2. 下一页url地址的提取,并且得到的页面做的操作和起始页的操作一样。

 url地址的提取

1. 提取详情页url,详情页的url地址如下:

 提取规则详情页的规则:

rules = (
        # 提取详情页的url地址  ,详情页url地址对应的响应,需要进行数据提取,所有需要有回调函数,用来解析数据
        
        Rule(LinkExtractor(restrict_xpaths=("//table[@class='tablelist']//td[@class='l square']")), callback='parse_item')
)

提取下一页的htmlj所在的位置:

2 获取下一页的url 规则:

rules = (
        # 提取详情页的url地址
        # Rule(LinkExtractor(allow=r'position_detail.php?id=\d+\&keywords=&tid=0&lid=0'), callback='parse_item'), # 这个表达式有错,这里不用正则
        Rule(LinkExtractor(restrict_xpaths=("//table[@class='tablelist']//td[@class='l square']")), callback='parse_item'),
        # 翻页
        Rule(LinkExtractor(restrict_xpaths=("//a[@id='next']")), follow=True),
    )

获取详情页数据

 1.详情数据提取(爬虫逻辑)

1.获取标题

xpath:

item['title'] = response.xpath('//td[@id="sharetitle"]/text()').extract_first()

 2. 获取工作地点,职位,招聘人数

xpath:

 item['addr'] = response.xpath('//tr[@class="c bottomline"]/td[1]//text()').extract()[1]

 item['position'] = response.xpath('//tr[@class="c bottomline"]/td[2]//text()').extract()[1]

 item['num'] = response.xpath('//tr[@class="c bottomline"]/td[3]//text()').extract()[1]

3.工作要求抓取

xpath:

item['skill'] =response.xpath('//ul[@class="squareli"]/li/text()').extract()

爬虫的代码:

# -*- coding: utf-8 -*-
import scrapy
from scrapy.linkextractors import LinkExtractor
from scrapy.spiders import CrawlSpider, Rule

from ..items import TencentItem

class TencentSpider(CrawlSpider):
    name = 'tencent'
    allowed_domains = ['hr.tencent.com']
    start_urls = ['https://hr.tencent.com/position.php']

    rules = (
        # 提取详情页的url地址
        # Rule(LinkExtractor(allow=r'position_detail.php?id=\d+\&keywords=&tid=0&lid=0'), callback='parse_item'), # 这个表达式有错
        Rule(LinkExtractor(restrict_xpaths=("//table[@class='tablelist']//td[@class='l square']")), callback='parse_item'),
        # 翻页
        Rule(LinkExtractor(restrict_xpaths=("//a[@id='next']")), follow=True),
    )

    def parse_item(self, response):

        item = TencentItem()


        item['title'] = response.xpath('//td[@id="sharetitle"]/text()').extract_first()

        item['addr'] = response.xpath('//tr[@class="c bottomline"]/td[1]//text()').extract()[0]

        item['position'] = response.xpath('//tr[@class="c bottomline"]/td[2]//text()').extract()[0]

        item['num'] = response.xpath('//tr[@class="c bottomline"]/td[3]//text()').extract()[0]

        item['skill'] =response.xpath('//ul[@class="squareli"]/li/text()').extract()

        print(dict(item))

        return item
tencent.py

2. 数据存储

1.settings.py 配置文件,配置如下信息

ROBOTSTXT_OBEY = False
USER_AGENT = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36'
ITEM_PIPELINES = {
   'jd.pipelines.TencentPipeline': 300,

}

2. items.py 中:

import scrapy

class TencentItem(scrapy.Item):
    # define the fields for your item here like:
    title = scrapy.Field()
    addr = scrapy.Field()
    position = scrapy.Field()
    num = scrapy.Field()
    skill = scrapy.Field()

3. pipeline.py中:

import  pymongo

class TencentPipeline(object):


    def open_spider(self,spider):
        # 爬虫开启是连接数据库
        client = pymongo.MongoClient()

        collention = client.tencent.ten

        self.client =client

        self.collention = collention


        pass
    def process_item(self, item, spider):

        # 数据保存在mongodb 中


        self.collention.insert(dict(item))


        return item


    def colse_spdier(self,spider):

        # 爬虫结束,关闭数据库

        self.client.close()

启动项目

1.先将MongoDB数据库跑起来。

2.执行爬虫命令:

scrapy  crawl  tencent

3. 执行程序后的效果:

 

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转载自www.cnblogs.com/knighterrant/p/10714234.html