scrapy-splash抓取动态数据例子八

Posted 2020-09-22 shaomine

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

　　　　

 

 

 

　　　　

 

　　　　　　

 

　　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 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 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