• scrapy-splash抓取动态数据例子十


      一、介绍

        本例子用scrapy-splash抓取活动行网站给定关键字抓取活动信息。

        给定关键字:数字;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('//ul[@class="event-horizontal-list-new"]/li')

        2、抓取标题

          抓取代码:title = str(sel.xpath('.//h3/a/text()')[0].extract())

        3、抓取链接

          抓取代码:url = 'http://www.huodongxing.com' + str(sel.xpath('.//a/@href')[0].extract())

        4、抓取日期

          抓取代码:dates = sel.xpath('.//div[1]/text()')

        5、主办方

          抓取代码:organizers = sel.xpath('.//div[3]/a[2]/span/text()')

        6、地点

          抓取代码:areas = site.xpath('.//div[@class="address"]/a/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 scrapy_ott.items import SplashMeetingItem
    from scrapy_ott.mongoDB import mongoDbBase
    import scrapy_ott.IniFile
    from scrapy_ott.LogFile import LogFile
    import sys
    import os
    import re
    import time
    
    reload(sys)
    sys.setdefaultencoding('utf-8')
    import urllib
    # sys.stdout = open('output.txt', 'w')
    
    class huodongxingSpider(Spider):
        log = LogFile(time.strftime('%Y-%m-%d') + '.txt')
        name = 'huodongxing'
        db = mongoDbBase()
        configfile = os.path.join(os.getcwd(), 'scrapy_ottsetting.conf')
    
        cf = scrapy_ott.IniFile.ConfigFile(configfile)
        meeting_wordlist = cf.GetValue("section", "meeting_keywords").split(';')
        websearch_url = cf.GetValue("huodongxing", "websearchurl")
        start_urls = []
        for keyword in meeting_wordlist:
            url = websearch_url + '&pi='+ str(1)+ '&qs=' +keyword
            start_urls.append(url)
        # request需要封装成SplashRequest
        def start_requests(self):
            self.log.WriteLog(u'抓取活动行网站数据')
            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):
            '''
            判断日期时间字符串是否合法:如果给定时间大于当前时间是合法,或者说当前时间给定的范围内
            :param strDateText: 四种格式 '2小时前'; '2天前' ; '昨天' ;'2017.2.12 '
            :return: True:合法;False:不合法
            '''
            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(strDate[0],currentDate)>0:
                    return True,strDate[0]
            return False, ''
    
        def parse(self, response):
            site = Selector(response)
            sels = site.xpath('//ul[@class="event-horizontal-list-new"]/li')
            keyword = response.meta['keyword']
    
            for sel in sels:
                dates = sel.xpath('.//div[1]/text()')
                if len(dates) > 0:
                    strdate = str(dates[1].extract())
                    flag, date = self.date_isValid(strdate)
                    if flag:
                        title = str(sel.xpath('.//h3/a/text()')[0].extract())
                        if title.find(keyword) > -1:
                            url = 'http://www.huodongxing.com' + str(sel.xpath('.//a/@href')[0].extract())
                            organizers = sel.xpath('.//div[3]/a[2]/span/text()')
                            if len(organizers)>0:
                                organizer = organizers[0].extract()
                            yield SplashRequest(url
                                                , self.parse_item
                                                , args={'wait': '1'},
                                                meta={'date': date, 'url': url,
                                                      'keyword': keyword, 'title': title,'organizer':organizer}
                                                )
    
    
        def parse_item(self, response):
            site = Selector(response)
            it = SplashMeetingItem()
            it['title'] = response.meta['title']
            it['url'] = response.meta['url']
            it['date'] = response.meta['date']
            it['keyword'] = response.meta['keyword']
            it['startdate'] = response.meta['date']
            it['enddate'] = response.meta['date']
            it['organizer'] = response.meta['organizer']
            dates=site.xpath('.//div[@class="media-body"]/div[1]/text()|.//div[@class="media-body"]/div[1]/em/text()')
            if len(dates)>0:
                print dates[0].extract()
                # it['date'] = dates[0].extract()
            areas = site.xpath('.//div[@class="address"]/a/text()')
            if len(areas) > 0:
                it['area'] = areas[0].extract()
            self.db.SaveMeeting(it)
            return it
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  • 原文地址:https://www.cnblogs.com/shaosks/p/6992626.html
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