[Python爬虫] 之四：Selenium 抓取微博数据

抓取代码：

# coding=utf-8
import os
import re
from selenium import webdriver
import selenium.webdriver.support.ui as ui
from selenium.webdriver.common.keys import Keys
import time
from selenium.webdriver.common.action_chains import ActionChains
import IniFile
class weibo:

    def __init__(self):
        #通过配置文件获取IEDriverServer.exe路径
        configfile = os.path.join(os.getcwd(),'config.conf')
        cf = IniFile.ConfigFile(configfile)
        IEDriverServer = cf.GetValue("section", "IEDriverServer")
        #每抓取一页数据延迟的时间，单位为秒，默认为5秒
        self.pageDelay = 5
        pageInteralDelay = cf.GetValue("section", "pageInteralDelay")
        if pageInteralDelay:
            self.pageDelay = int(pageInteralDelay)

        os.environ["webdriver.ie.driver"] = IEDriverServer
        self.driver = webdriver.Ie(IEDriverServer)

    def scroll_top(self):
        '''
        滚动条拉到顶部
        :return:
        '''
        if self.driver.name == "chrome":
            js = "var q=document.body.scrollTop=0"

        else:
            js = "var q=document.documentElement.scrollTop=0"
        return self.driver.execute_script(js)

    def scroll_foot(self):
        '''
        滚动条拉到底部
        :return:
        '''

        if self.driver.name == "chrome":
            js = "var q=document.body.scrollTop=10000"

        else:
            js = "var q=document.documentElement.scrollTop=10000"
        return self.driver.execute_script(js)

    def printTopic(self,topic):
        print '原始数据： %s' % topic
        print ' '
        author_time_nums_index = topic.rfind('@')
        ht = topic[:author_time_nums_index]
        ht = ht.replace('\n', '')
        print '话题：     %s' % ht

        author_time_nums = topic[author_time_nums_index:]
        author_time = author_time_nums.split('ñ')[0]
        nums = author_time_nums.split('ñ')[1]
        pattern1 = re.compile(r'\d{1,2}分钟前|今天\s{1}\d{2}:\d{2}|\d{1,2}月\d{1,2}日\s{1}\d{2}:\d{2}')
        time1 = re.findall(pattern1, author_time)

        print '话题作者： %s' % author_time.split(' ')[0]
        # print '时间：     %s' % author_time.split(' ')[1]
        print '时间：     %s' % time1[0]
        print '点赞量：   %s' % nums.split(' ')[0]
        print '评论量：   %s' % nums.split(' ')[1]
        print '转发量：   %s' % nums.split(' ')[2]
        print ' '


    def CatchData(self,listClass,firstUrl):
        '''
        抓取数据
        :param id: 要获取元素标签的ID
        :param firstUrl: 首页Url
        :return:
        '''
        start = time.clock()
        #加载首页
        wait = ui.WebDriverWait(self.driver, 20)
        self.driver.get(firstUrl)
        #打印标题
        print self.driver.title

        # # 聚焦元素
        # target = self.driver.find_element_by_id('J_ItemList')
        # self.driver.execute_script("arguments[0].scrollIntoView();", target)

        #滚动5次滚动条
        Scrollcount = 5
        while Scrollcount > 0:
            Scrollcount = Scrollcount -1
            self.scroll_foot() #滚动一次滚动条，定位查找一次
            total = 0
            for className in listClass:
                time.sleep(10)
                wait.until(lambda driver: self.driver.find_elements_by_xpath(className))
                Elements = self.driver.find_elements_by_xpath(className)
                for element in Elements:
                    print ' '
                    txt =  element.text.encode('utf8')
                    self.printTopic(txt)
                    total = total + 1

        self.driver.close()
        self.driver.quit()
        end = time.clock()

        print ' '
        print "共抓取了: %d 个话题" % total
        print "整个过程用时间: %f 秒" % (end - start)

# #测试抓取微博数据
obj = weibo()
#pt_li pt_li_2 S_bg2
#pt_li pt_li_1 S_bg2
# firstUrl = "http://weibo.com/?category=0"
firstUrl = "http://weibo.com/?category=1760"
listClass = []
listClass.append("//li[@class='pt_li pt_li_1 S_bg2']")
listClass.append("//li[@class='pt_li pt_li_2 S_bg2']")
obj.CatchData(listClass,firstUrl)

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 def longon(self):

        flag = True
        try:

            self.driver.get('https://weibo.com/')
            self.driver.maximize_window()
            time.sleep(2)
            accname = self.driver.find_element_by_id("loginname")

            accname.send_keys('username')

            accpwd = self.driver.find_element_by_name("password")
            accpwd.send_keys('password')
            submit = self.driver.find_element_by_xpath("//div[@class='info_list login_btn']/a")
            submit.click()
            time.sleep(2)
        except Exception as e1:
            message = str(e1.args)
            flag = False
        return flag