python爬虫-梨视频短视频爬取(线程池)
示例代码
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import requestsfrom lxml import etreeimport randomfrom multiprocessing.dummy import Pool# 多进程要传的方法，多进程pool.map()传的第二个参数是一个迭代器对象# 而传的get_video方法也要有一个迭代器参数def get_video(dic): headers = { 'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.96 Safari/537.36 Edg/88.0.705.56' } video_data = requests.get(url = dic['url'] , headers = headers).content print(dic['name']+'开始下载') # 有的文件名中包含空格，在并发执行时会报错，这里用随机数给文件起名了 #path = dic['name']+'.mp4'会报错 path = "./lishipin/"+str(int(random.random()*100)) + '.mp4' with open(path,'wb') as fp: fp.write(video_data) print(dic['name']+'下载成功')def main(): # web_url:梨视频官网 web_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/88.0.4324.96 Safari/537.36 Edg/88.0.705.56' } # web_page_tex:官网页面 web_page_text = requests.get(url = web_url,headers = headers).text tree = etree.HTML(web_page_text) # 解析梨视频官网“生活栏”中的所有li标签，遍历li标签，提取视频的url li_list = tree.xpath('//*[@id="listvideoListUl"]/li') rea_urls=[] for li in li_list: # video_name获取视频的名称 video_name = li.xpath('./div/a/div[2]/text()')[0]+'.mp4' # 加上'https://www.pearvideo.com/'得到完整的video_url video_url = 'https://www.pearvideo.com/'+li.xpath("./div/a/@href")[0] # 通过官网界面提取的url，并不是真正的url， # 因为MP4的视频是动态加载出来的，所以通过ajax请求获取视频的真实网址 # 但是通过分析发现，ajax请求获取的网址是一个伪网址，和真实网址有区别(cont...) ##真地址：https://video.pearvideo.com/mp4/third/20210208/cont-1719874-15690592-205957-ld.mp4 ## 1719874 ##伪地址：https://video.pearvideo.com/mp4/third/20210208/1612867876612-15690592-205957-ld.mp4 # 通过得到的video_url可以分析到 真假网址 不同的细节之处--countId # 通过ajax请求向video_url发起get请求，需要加countId和mrd参数 # 分析video_url得到countId，mrd是一个随机小树 countId = video_url.split("/")[-1].split("_")[1] mrd = random.random() # 加'Referer'参数，否则会显示该视频已下架了 headers = { 'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.96 Safari/537.36 Edg/88.0.705.56', 'Referer': 'https://www.pearvideo.com/video_' + countId } ajax_url = 'https://www.pearvideo.com/videoStatus.jsp' # 利用ajax请求获取伪地址 # https://www.pearvideo.com/videoStatus.jsp?contId=1719874&mrd=0.7759942025851074 params = { 'contId': str(countId), 'mrd': str(mrd) } # 通过ajax请求，发起get请求得到一个json串 ajax_json = requests.get(url = ajax_url,headers = headers,params = params).json() # 得到的是 假地址 fake_url = ajax_json['videoInfo']['videos']['srcUrl'] # 对假地址进行处理，并把刚才的countId组合起来 fake_url_list = fake_url.split('/') end = fake_url_list.pop() #删除不必要的字符串 end_list = end.split("-") end_url = "" #end_url是一个结尾字符串 for i in range(len(end_list)-1): end_url = end_url + "-"+ end_list[i+1] # 真实的地址，先用假地址，然后组合countId rea_url="" for element in fake_url_list: rea_url=rea_url+element+"/" rea_url=rea_url+"cont-"+str(countId) + end_url # print(rea_url) dic = { 'url':rea_url, 'name':video_name } rea_urls.append(dic) #print(rea_urls) pool = Pool(4) pool.map(get_video,rea_urls) pool.close() pool.join() if __name__ == '__main__': main() |
知识点扩展：
Python爬虫下载视频（梨视频）
梨视频示例：Ctrl+Alt+L格式化代码
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import reimport requestsimport hashlibimport time# print(respose.status_code)# 响应的状态码# print(respose.content) #返回字节信息# print(respose.text) #返回文本内容 mainurl = "https://www.pearvideo.com/"videourl = "http://www.pearvideo.com/video_1499584"headers={ 'User-Agent':'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36', 'Accept-Encoding':'gzip, deflate, sdch', 'Accept':'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8', 'Accept-Language':'zh-CN,zh;q=0.8', }# 获取视频链接列表def geturls(url): res=requests.get(url) urls=re.findall('class="vervideo-tbd".*?href="(.*?)" rel="external nofollow" ',res.text,re.S) urllist=[] for i in urls: prefix='https://www.pearvideo.com/' urllist.append(prefix+i) return urllist# 获取视频链接并下载（写入到硬盘）def getvideo(url): res=requests.get(url,headers) mp4url=re.findall('srcUrl="(.*?\.mp4)"',res.text,re.S)[0] video=requests.get(mp4url) m = hashlib.md5() m.update(url.encode('utf-8')) m.update(str(time.time()).encode('utf-8')) filename = r'%s.mp4' % m.hexdigest() print(filename) with open("/home/tony/文档/爬虫视频/%s.mp4"%filename,'wb') as f: f.write(video.content)def main(): video_urllist=geturls(mainurl) for i in video_urllist: getvideo(i)if __name__=='__main__': main() |
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原文链接：https://blog.csdn.net/m0_46500590/article/details/113775998
