scrapy-splash抓取动态数据例子五

# -*- 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 zndsSpider(Spider):
    name = ‘znds‘

    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("znds", "websearchurl").split(‘;‘)
    start_urls = []
    for word in websearch_urls:
        start_urls.append(word)

    # 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):
        ‘‘‘
        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(currentDate,strDate[0])==0:
                return True,currentDate
        return False, ‘‘
    def parse(self, response):

        site = Selector(response)
        # keyword = response.meta[‘keyword‘]
        sels = site.xpath(‘//div[@class="listl list2"]/ul/li‘)
        for sel in sels:
            titles = sel.xpath(‘.//h3/a/text()‘)
            if len(titles)>0:
                title = str(titles[0].extract())
                strdate = str(sel.xpath(‘.//span/text()‘).extract())
                flag,date =self.date_isValid(strdate)
                if flag:
                    url = ‘http://news.znds.com‘ + str(sel.xpath(‘.//h3/a/@href‘)[0].extract())
                    for keyword in self.information_wordlist:
                        if title.find(keyword)>-1:
                            url = ‘http://news.znds.com‘+ str(sel.xpath(‘.//h3/a/@href‘)[0].extract())
                            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="spanimg2"]/text()‘)
        if len(sources)>0:
            source =str(sources[0].extract()).replace(u‘来源： ‘,‘‘)
            it[‘source‘] = source
        return it