python爬取梨视频生活板块最热视频

python学习教程

发布于 2021-03-17 11:36:17

7390

发布于 2021-03-17 11:36:17

完整代码如下：

import requestsfrom lxml import etreeimport randomimport osfrom multiprocessing.dummy import Poolif not os.path.exists('./视频'):os.mkdir('./视频')urls=[]url='https://www.pearvideo.com/category_5'headers={'user-agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.36 Edg/89.0.774.45'}page_text=requests.get(url=url,headers=headers).texttree=etree.HTML(page_text)li_list=tree.xpath('//ul[@id="listvideoListUl"]/li')for li in li_list:a_url='https://www.pearvideo.com/'+li.xpath('./div/a/@href')[0]name=li.xpath('./div/a/div[2]/text()')[0]+'.mp4'mrd=random.random()code=li.xpath('./div/a/@href')[0][-7:]new_headers={'Referer': a_url,'user-agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.82 Safari/537.36 Edg/89.0.774.50'}new_url='https://www.pearvideo.com/videoStatus.jsp?contId='+str(code)+'&mrd='+str(mrd)r=requests.get(url=new_url,headers=new_headers)video_url=eval(r.text)['videoInfo']['videos']['srcUrl']old=video_url.split('/')[-1].split('-')[0]new='cont-'+str(code)true_video_url=video_url.replace(old,new)dic={'name':name,'my_url':true_video_url}urls.append(dic)#使用线程池对数据视频进行请求def get_video_data(dic):print(dic['name']+'开始下载'+'\n')data_url=dic['my_url']data=requests.get(url=data_url,headers=headers).contentwith open('./视频/'+dic['name'],'wb') as f:f.write(data)print(dic['name']+'下载成功')pool=Pool(4)pool.map(get_video_data,urls)pool.close()pool.join()

说明：

当前日期（2021/3/14）版本的梨视频的视频伪url由ajax获取。

部分代码解释:

1：模块

import requests #网路爬虫标准库（代替urllib)from lxml import etree #用于解析页面信息import random #梨视频的url中有一段需要随机数import os #主要用于生成文件夹存放视频from multiprocessing.dummy import Pool #导入线程池对应类

2：获取视频伪url

#参数准备mrd=random.random()code=li.xpath('./div/a/@href')[0][-7:]new_headers={'Referer': a_url,'user-agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.82 Safari/537.36 Edg/89.0.774.50'}#获取urlnew_url='https://www.pearvideo.com/videoStatus.jsp?contId='+str(code)+'&mrd='+str(mrd)r=requests.get(url=new_url,headers=new_headers)video_url=eval(r.text)['videoInfo']['videos']['srcUrl']

3：获取真正url

经本人实验，使用上文获得的url爬取视频下载内容为空。

此处视频地址做了加密即ajax中得到的地址需要加上cont-,并且修改一段数字为id才是真地址真地址："https://video.pearvideo.com/mp4/third/20201120/cont-1708144-10305425-222728-hd.mp4" 伪地址："https://video.pearvideo.com/mp4/third/20201120/1606132035863-10305425-222728-hd.mp4"

#仅需要做几个简单的截取切片操作就可以替换相关内容old=video_url.split('/')[-1].split('-')[0]new='cont-'+str(code)true_video_url=video_url.replace(old,new)

4：存储

#使用线程池对数据视频进行请求def get_video_data(dic):print(dic['name']+'开始下载'+'\n')data_url=dic['my_url']data=requests.get(url=data_url,headers=headers).contentwith open('./视频/'+dic['name'],'wb') as f:f.write(data)print(dic['name']+'下载成功')pool=Pool(4)pool.map(get_video_data,urls)pool.close()pool.join()

5：结果