一、介紹
本例子用Selenium +phantomjs爬取今日頭條(http://www.toutiao.com/search/?keyword=電視)的資訊信息,輸入給定關鍵字抓取資訊信息。
給定關鍵字:數字;融合;電視
抓取信息內如下:
1、資訊標題
2、資訊鏈接
3、資訊時間
4、資訊來源
二、網站信息
三、數據抓取
針對上面的網站信息,來進行抓取
1、首先抓取信息列表
抓取代碼:Elements = doc('div[class="articleCard"]')
2、抓取標題
抓取代碼:title = element('a[class="link title"]').find('span').text().encode('utf8').replace(' ', '')
3、抓取鏈接
抓取代碼:url = 'http://www.toutiao.com' + element.find('a[class="link title"]').attr('href')
4、抓取日期
抓取代碼:strdate = element('span[class="lbtn"]').text().encode('utf8').strip()
5、抓取來源
抓取代碼:source = element('a[class="lbtn source J_source"]').text().encode('utf8').replace(' ', '')
四、完整代碼
# coding=utf-8 import os import re from selenium import webdriver import selenium.webdriver.support.ui as ui import time from datetime import datetime import IniFile # from threading import Thread from pyquery import PyQuery as pq import LogFile import mongoDB import urllib class toutiaoSpider(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) webSearchUrl = cf.GetValue("toutiao", "webSearchUrl") self.keyword_list = cf.GetValue("section", "information_keywords").split(';') self.db = mongoDB.mongoDbBase() self.start_urls = [] for word in self.keyword_list: self.start_urls.append(webSearchUrl + urllib.quote(word)) self.driver = webdriver.PhantomJS() self.wait = ui.WebDriverWait(self.driver, 2) self.driver.maximize_window() def scroll_foot(self): ''' 滾動條拉到底部 :return: ''' js = "" # 如何利用chrome驅動或phantomjs抓取 if self.driver.name == "chrome" or self.driver.name == 'phantomjs': js = "var q=document.body.scrollTop=10000" # 如何利用IE驅動抓取 elif self.driver.name == 'internet explorer': js = "var q=document.documentElement.scrollTop=10000" return self.driver.execute_script(js) def date_isValid(self, strDateText): ''' 判斷日期時間字符串是否合法:如果給定時間大於當前時間是合法,或者說當前時間給定的范圍內 :param strDateText: 四種格式 '2小時前'; '2天前' ; '昨天' ;'2017.2.12 ' :return: True:合法;False:不合法 ''' currentDate = time.strftime('%Y-%m-%d') if strDateText.find('分鍾前') > 0 or strDateText.find('剛剛') > -1: return True, currentDate elif strDateText.find('小時前') > 0: datePattern = re.compile(r'\d{1,2}') ch = int(time.strftime('%H')) # 當前小時數 strDate = re.findall(datePattern, strDateText) if len(strDate) == 1: if int(strDate[0]) <= ch: # 只有小於當前小時數,才認為是今天 return True, currentDate return False, '' def log_print(self, msg): ''' # 日志函數 # :param msg: 日志信息 # :return: # ''' print '%s: %s' % (time.strftime('%Y-%m-%d %H-%M-%S'), msg) def scrapy_date(self): strsplit = '------------------------------------------------------------------------------------' index = 0 for link in self.start_urls: self.driver.get(link) keyword = self.keyword_list[index] index = index + 1 time.sleep(1) #數據比較多,延遲下,否則會出現查不到數據的情況 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('div[class="articleCard"]') for element in Elements.items(): strdate = element('span[class="lbtn"]').text().encode('utf8').strip() flag, date = self.date_isValid(strdate) if flag: title = element('a[class="link title"]').find('span').text().encode('utf8').replace(' ', '') if title.find(keyword) > -1: url = 'http://www.toutiao.com' + element.find('a[class="link title"]').attr('href') source = element('a[class="lbtn source J_source"]').text().encode('utf8').replace(' ', '') dictM = {'title': title, 'date': date, 'url': url, 'keyword': keyword, 'introduction': title, 'source': source} infoList.append(dictM) # self.log.WriteLog('title:%s' % title) # self.log.WriteLog('url:%s' % url) # self.log.WriteLog('source:%s' % source) # self.log.WriteLog('kword:%s' % keyword) # self.log.WriteLog(strsplit) self.log_print('title:%s' % dictM['title']) self.log_print('url:%s' % dictM['url']) self.log_print('date:%s' % dictM['date']) self.log_print('source:%s' % dictM['source']) self.log_print('kword:%s' % dictM['keyword']) self.log_print(strsplit) if len(infoList)>0: self.db.SaveInformations(infoList) self.driver.close() self.driver.quit() obj = toutiaoSpider() obj.scrapy_date()