scrapy-splash抓取动态数据例子九
一、介绍
本例子用scrapy-splash抓取众视网网站给定关键字抓取咨询信息。
给定关键字:个性化;融合;电视
抓取信息内如下:
1、资讯标题
2、资讯链接
3、资讯时间
4、资讯来源
二、网站信息
三、数据抓取
针对上面的网站信息,来进行抓取
1、首先抓取信息列表
抓取代码:sels = site.xpath('//div[@class="topic overfl"]')
2、抓取标题
抓取代码:title = sel.xpath('.//div[@class="info"]/h3/a/text()')[0].extract()
3、抓取链接
抓取代码:url = 'http://www.dvbcn.com' + str(sel.xpath('.//div[@class="info"]/h3/a/@href')[0].extract())
4、抓取日期
抓取代码:strdate = sel.xpath('.//span[@class="time"]/text()')[0].extract()
5、抓取来源
抓取代码:sources = site.xpath('//span[@class="news_from"]/font/text()')
四、完整代码
# -*- coding: utf-8 -*- import scrapy from scrapy import Request from scrapy.spiders import Spider from scrapy_splash import SplashRequest from scrapy_splash import SplashMiddleware from scrapy.http import Request, HtmlResponse from scrapy.selector import Selector from scrapy_splash import SplashRequest from splash_test.items import SplashTestItem import IniFile import sys import os import re import time reload(sys) sys.setdefaultencoding('utf-8') # sys.stdout = open('output.txt', 'w') class dvbcnSpider(Spider): name = 'dvbcn' configfile = os.path.join(os.getcwd(), 'splash_test\spiders\setting.conf') cf = IniFile.ConfigFile(configfile) information_wordlist = cf.GetValue("section", "information_keywords").split(';') websearch_urls = cf.GetValue("dvbcn", "websearchurl").split(';') start_urls = [] for url in websearch_urls: print url start_urls.append(url) # request需要封装成SplashRequest def start_requests(self): for url in self.start_urls: yield SplashRequest(url , self.parse , args={'wait': '2'} ) def Comapre_to_days(self,leftdate, rightdate): ''' 比较连个字符串日期,左边日期大于右边日期多少天 :param leftdate: 格式:2017-04-15 :param rightdate: 格式:2017-04-15 :return: 天数 ''' l_time = time.mktime(time.strptime(leftdate, '%Y-%m-%d')) r_time = time.mktime(time.strptime(rightdate, '%Y-%m-%d')) result = int(l_time - r_time) / 86400 return result def date_isValid(self, strDateText): currentDate = time.strftime('%Y-%m-%d') datePattern = re.compile(r'\d{4}-\d{1,2}-\d{1,2}') strDate = re.findall(datePattern, strDateText) if len(strDate) == 1: if self.Comapre_to_days(currentDate,strDate[0])==0: return True,currentDate return False, '' def parse(self, response): site = Selector(response) sels = site.xpath('//div[@class="topic overfl"]') for sel in sels: strdate = sel.xpath('.//span[@class="time"]/text()')[0].extract() flag, date = self.date_isValid(strdate) if flag: title = sel.xpath('.//div[@class="info"]/h3/a/text()')[0].extract() url = 'http://www.dvbcn.com' + str(sel.xpath('.//div[@class="info"]/h3/a/@href')[0].extract()) for keyword in self.information_wordlist: if title.find(keyword) > -1: yield SplashRequest(url , self.parse_item , args={'wait': '1'}, meta={'date': date, 'url': url, 'keyword': keyword, 'title': title} ) def parse_item(self, response): site = Selector(response) it = SplashTestItem() it['title'] = response.meta['title'] it['url'] = response.meta['url'] it['date'] = response.meta['date'] it['keyword'] = response.meta['keyword'] sources = site.xpath('//span[@class="news_from"]/font/text()') if len(sources)>0: it['source'] = sources[0].extract() return it