一、介绍
本例子用scrapy-splash通过搜狗搜索引擎，输入给定关键字抓取资讯信息。
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('//div[@class="vrwrap"]')
2、抓取标题
抓取代码：titles = sel.xpath('.//h3[@class="vrTitle"]/a/text()|.//h3[@class="vrTitle"]/a/em/text()')
3、抓取链接
抓取代码：it['url'] = sel.xpath('.//h3[@class="vrTitle"]/a/@href')[0].extract()
4、抓取日期
抓取代码：strdate = sel.xpath('.//p[@class="news-from"]/text()')
5、抓取来源
抓取代码：sources = sel.xpath('.//p[@class="news-from"]/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 scrapy_ott.items import SplashTestItemfrom scrapy_ott.mongoDB import mongoDbBaseimport scrapy_ott.IniFileimport sysimport osimport reimport timereload(sys)sys.setdefaultencoding('utf-8')# sys.stdout = open('output.txt', 'w')class sougouSpider(Spider): name = 'sougou' db = mongoDbBase() configfile = os.path.join(os.getcwd(), 'scrapy_ott\setting.conf') cf = scrapy_ott.IniFile.ConfigFile(configfile) information_keywords = cf.GetValue("section", "information_keywords") information_wordlist = information_keywords.split(';') # websearchurl = cf.GetValue("sougou", "websearchurl") start_urls = [] for word in information_wordlist: start_urls.append('http://news.sogou.com/news?page=1&query=' + word) start_urls.append('http://news.sogou.com/news?page=2&query=' + word) start_urls.append('http://news.sogou.com/news?page=3&query=' + 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): ''' 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 '慧聪网 7小时前'; '新浪游戏 29分钟前' ; '中国行业研究网 2017-6-13' :return: True:合法；False:不合法 ''' currentDate = time.strftime('%Y-%m-%d') source = strDateText.split(' ')[0] if strDateText.find('分钟前') > 0 : return True,source,currentDate elif strDateText.find('小时前') > 0: datePattern = re.compile(r'\d{1,2}') ch = int(time.strftime('%H')) # 当前小时数 strDate = re.findall(datePattern, strDateText) if len(strDate) == 1: if int(strDate[0]) <= ch: # 只有小于当前小时数，才认为是今天 return True,source,currentDate else: 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,source,currentDate return False, '','' def parse(self, response): keyword = response.meta['keyword'] site = Selector(response) sels = site.xpath('//div[@class="vrwrap"]') item_list = [] for sel in sels: strdate = sel.xpath('.//p[@class="news-from"]/text()') if len(strdate)>0: flag, source, date = self.date_isValid(strdate[0].extract()) if flag: titles = sel.xpath('.//h3[@class="vrTitle"]/a/text()|.//h3[@class="vrTitle"]/a/em/text()') title = '' for t in titles: title += str(t.extract()) if title.find(keyword) > -1: it = SplashTestItem() it['source'] = source it['url'] = sel.xpath('.//h3[@class="vrTitle"]/a/@href')[0].extract() it['date'] = date it['keyword'] = keyword it['title'] = title item_list.append(it) if len(item_list)>0: self.db.SaveInformations(item_list) return item_list