[Python爬虫] 之二十七：Selenium +phantomjs 利用 pyquery抓取今日头条视频

一、介绍

　　　　本例子用Selenium +phantomjs爬取今天头条视频（http://www.tvhome.com/news/）的信息，输入给定关键字抓取图片信息。

　　　　给定关键字：视频；融合；电视

　　　

　

　　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、首先抓取视频信息列表

　　　　　　抓取代码：Elements = doc('div[class="articleCard"]')

　　　　2、抓取图片

　　　　　　视频url：url = 'http://www.toutiao.com' + element.find('a[class="link title"]').attr('href')

　　　　　　　　　　videourl = dochtml('video[class="vjs-tech"]').find('source').attr('src')

 　　

　　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
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 down_video(self, videourl):
        """
                                       下载视频到本地
                                       :param videourl: 视频url
                                       """
        # http://img.tvhomeimg.com/uploads/2017/06/23/144910c41de4781ccfe9435e736ef72b.jpg
        if len(videourl) > 0:
            fileName = ''
            if videourl.rfind('/') > 0:
                fileName = time.strftime('%Y%m%d%H%M%S') + '.mp4'
                u = urllib.urlopen(videourl)
                data = u.read()

                strpath = os.path.join(os.path.dirname(os.getcwd()), 'video')
                with open(os.path.join(strpath, fileName), 'wb') as f:
                    f.write(data)

    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) #数据比较多，延迟下，否则会出现查不到数据的情况

            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():
                url = 'http://www.toutiao.com' + element.find('a[class="link title"]').attr('href')
                infoList.append(url)
            if len(infoList)>0:
                for url in infoList:
                    self.driver.get(url)
                    htext = self.driver.execute_script("return document.documentElement.outerHTML")
                    dochtml = pq(htext)
                    videourl = dochtml('video[class="vjs-tech"]').find('source').attr('src')
                    if videourl:
                        self.down_video(videourl)

        self.driver.close()
        self.driver.quit()

obj = toutiaoSpider()
obj.scrapy_date()