一、介绍
本例子用Selenium +phantomjs爬取梅花网(http://www.meihua.info/a/list/today)的资讯信息,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:Elements = doc('li[class="item"]')
2、抓取标题
抓取代码:title = element('a[class="list-title-color no-link"]').text().encode('utf8').strip()
3、抓取链接
抓取代码:url = 'http://www.meihua.info' + element('a[class="list-title-color no-link"]').attr('href')
4、抓取日期
抓取代码:date = element('span[class="desc-font date"]').text().encode('utf8').strip()
5、抓取来源
抓取代码:strSource = dochtml('div[class="art-content"]').eq(0).find('font').eq(0).text().encode('utf8').strip()
四、完整代码
# coding=utf-8 import os import re from selenium import webdriver import selenium.webdriver.support.ui as ui import time from datetime import datetime from selenium.webdriver.common.action_chains import ActionChains import IniFile from threading import Thread from pyquery import PyQuery as pq import LogFile import mongoDB class meihuaSpider(object): def __init__(self): logfile = os.path.join(os.path.dirname(os.getcwd()), time.strftime('%Y-%m-%d') + '.txt') self.log = LogFile.LogFile(logfile) configfile = os.path.join(os.path.dirname(os.getcwd()), 'setting.conf') cf = IniFile.ConfigFile(configfile) self.webSearchUrl_list = cf.GetValue("meihua", "webSearchUrl").split(';') self.keyword_list = cf.GetValue("section", "information_keywords").split(';') self.db = mongoDB.mongoDbBase() self.start_urls = [] for url in self.webSearchUrl_list: self.start_urls.append(url) self.driver = webdriver.PhantomJS() self.wait = ui.WebDriverWait(self.driver, 2) self.driver.maximize_window() 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 '今天'; '前天' ; '昨天' ;'06月12日 ' :return: True:合法;False:不合法 ''' currentDate = time.strftime('%Y-%m-%d') if strDateText.find('今天') > -1 : return True, currentDate return False, '' def log_print(self, msg): ''' # 日志函数 # :param msg: 日志信息 # :return: # ''' print '%s: %s' % (time.strftime('%Y-%m-%d %H-%M-%S'), msg) def scrapy_date(self): strsplit = '------------------------------------------------------------------------------------' for link in self.start_urls: self.driver.get(link) selenium_html = self.driver.execute_script("return document.documentElement.outerHTML") doc = pq(selenium_html) infoList = [] self.log.WriteLog(strsplit) self.log_print(strsplit) Elements = doc('li[class="item"]') # class属性内容以item doc style-开始的元素 for element in Elements.items(): date = element('span[class="desc-font date"]').text().encode('utf8').strip() flag, strDate = self.date_isValid(date) if flag: title = element('a[class="list-title-color no-link"]').text().encode('utf8').strip() for keyword in self.keyword_list: if title.find(keyword) > -1: url = 'http://www.meihua.info' + element('a[class="list-title-color no-link"]').attr('href') dictM = {'title': title, 'date': strDate, 'url': url, 'keyword': keyword, 'introduction': title, 'source': ''} infoList.append(dictM) break if len(infoList)>0: for item in infoList: url =item['url'] self.driver.get(url) htext = self.driver.execute_script("return document.documentElement.outerHTML") dochtml = pq(htext) slen =len('来源:') strSource = dochtml('div[class="art-content"]').eq(0).find('font').eq(0).text().encode('utf8').strip() if strSource.find('来源') > -1: strSource = strSource[strSource.find('来源') + slen:] if strSource.find('(') > -1: strSource = strSource[0:strSource.find('('):] item['source'] = strSource elif strSource.find('梅花网原创')>-1: item['source'] = " 梅花网" else: strSource = dochtml('div[class="art-content"]').text().encode('utf8').strip() if strSource.find('梅花网原创')>-1 or strSource.find('消息源:梅花网')>-1: item['source'] = '梅花网' else: strSource = dochtml('a[rel="nofollow"]').text().encode('utf8').strip() item['source'] = strSource self.log_print('title:%s' % item['title']) self.log_print('url:%s' % item['url']) self.log_print('date:%s' % item['date']) self.log_print('source:%s' % item['source']) self.log_print('kword:%s' % item['keyword']) self.log_print(strsplit) self.db.SaveInformations(infoList) self.driver.close() self.driver.quit() obj = meihuaSpider() obj.scrapy_date()