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scrapy-splash抓取动态数据例子八

一、介绍

    本例子用scrapy-splash抓取界面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

    技术分享

 

 

 

    技术分享

 

      技术分享

 

  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[contains(@class,"news-view")]‘)

    2、抓取标题

      抓取代码:title = sel.xpath(‘.//div[@class="news-header"]/h3/a/@title‘)[0].extract()

    3、抓取链接

      抓取代码:it[‘url‘] = sel.xpath(‘.//div[@class="news-header"]/h3/a/@href‘)[0].extract()

    4、抓取日期

      抓取代码:dates = sel.xpath(‘.//div[@class="news-footer"]/p/span[2]/text()‘)

    5、抓取来源

      抓取代码:sources =sel.xpath(‘.//div[@class="news-footer"]/p/span[1]/a/text()‘)

   

  四、完整代码

# -*- coding: utf-8 -*-import scrapyfrom scrapy import Requestfrom scrapy.spiders import Spiderfrom scrapy_splash import SplashRequestfrom scrapy_splash import SplashMiddlewarefrom scrapy.http import Request, HtmlResponsefrom scrapy.selector import Selectorfrom scrapy_splash import SplashRequestfrom splash_test.items import SplashTestItemimport IniFileimport sysimport osimport reimport timereload(sys)sys.setdefaultencoding(utf-8)# sys.stdout = open(‘output.txt‘, ‘w‘)class jiemianSpider(Spider):    name = jiemian    configfile = os.path.join(os.getcwd(), splash_test\spiders\setting.conf)    cf = IniFile.ConfigFile(configfile)    information_keywords = cf.GetValue("section", "information_keywords")    information_wordlist = information_keywords.split(;)    websearchurl = cf.GetValue("jiemian", "websearchurl")    start_urls = []    for word in information_wordlist:        print websearchurl + word        start_urls.append(websearchurl + word)    # request需要封装成SplashRequest    def start_requests(self):        for url in self.start_urls:            index = url.rfind(=)            yield SplashRequest(url                                , self.parse                                , args={wait: 2},                                meta={keyword: url[index + 1:]}                                )    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})        dt = strDateText.replace(/, -)        strDate = re.findall(datePattern, dt)        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[contains(@class,"news-view")])        keyword = response.meta[keyword]        item_list = []        for sel in sels:            dates = sel.xpath(.//div[@class="news-footer"]/p/span[2]/text())            flag,date =self.date_isValid(dates[0].extract())            title = sel.xpath(.//div[@class="news-header"]/h3/a/@title)[0].extract()            if  flag and title.find(keyword)>-1:                it = SplashTestItem()                it[title] = title                it[url] = sel.xpath(.//div[@class="news-header"]/h3/a/@href)[0].extract()                it[date] = date                it[keyword] = keyword                sources =sel.xpath(.//div[@class="news-footer"]/p/span[1]/a/text())                if len(sources)>0:                    it[source] = sources[0].extract()                item_list.append(it)        return item_list

 

scrapy-splash抓取动态数据例子八