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本次爬取,还是运用的是requests方法
首先进入bilibili官网中,选取你想要爬取的视频,进入视频播放页面,按F12,将网络中的名称栏向上拉找到第一个并点击,可以在标头中,找到后续我们想要的一些信息。
爬取视频的步骤大致分为
UA伪装
# UA伪装
head = {
"User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36 Edg/127.0.0.0"
# 防盗链子
, "Referer":"https://www.bilibili.com/"
,
"Cookie":"CURRENT_FNVAL=4048; buvid3=BE2D386A-BBCB-E06E-8C2B-F5223B4C8BC517591infoc; b_nut=1721567317; _uuid=67165DF10-7B77-BDE8-3C63-732C2FCAF4D520375infoc; enable_web_push=DISABLE; buvid4=0245F01B-6C4B-CD5A-2EC5-BC060EC0777D18433-024072113-zRTpkL0r94scQqxGfSYKhQ%3D%3D; home_feed_column=5; header_theme_version=CLOSE; rpdid=|(Y|RJRR)Y~0J'u~kulY~Rkk; DedeUserID=1611307689; DedeUserID__ckMd5=b0865dba0b3ced5b; buvid_fp_plain=undefined; is-2022-channel=1; b_lsid=D8542F24_191412D93C0; bsource=search_bing; bmg_af_switch=1; bmg_src_def_domain=i1.hdslb.com; browser_resolution=1659-943; bili_ticket=eyJhbGciOiJIUzI1NiIsImtpZCI6InMwMyIsInR5cCI6IkpXVCJ9.eyJleHAiOjE3MjM2MzQ1OTMsImlhdCI6MTcyMzM3NTMzMywicGx0IjotMX0.Ox8rnEpQH5i1H_wQfH2z5CzZC0y8PlqQCy1KVa8XEfQ; bili_ticket_expires=1723634533; SESSDATA=f567fef6%2C1738927393%2C5d207%2A82CjAh2pSUKwDLr1XiI6ncU5B6NXEfWKS7ES6mDC8yGxM6aT3-BTdvK0KAlYpMhCXtEXgSVkl2aTlQWUNacTZOZ0ZNXzJwZ21QT2ozMXFXcWtFc1FpNnBIWlNWbml2Y3BxNV80bUNMZTBVN1dyb3h0STU1ZklDM0MwckJvanRmTmNkeTBFcW5qYl9RIIEC; bili_jct=8d788bcb503d69ba2ded7dfbb53f6e58; sid=71po5kkf; fingerprint=0c7279b7c69b9542a76b8d9df9b7872a; buvid_fp=BE2D386A-BBCB-E06E-8C2B-F5223B4C8BC517591infoc; bp_t_offset_1611307689=964382000909647872"
}
获取url
可以在标头中看到请求URL
# 指定url 自定义一个变量接收
url = "https://www.bilibili.com/video/BV17w4m1e7PT/?spm_id_from=333.1007.tianma.1-1-1.click&vd_source=2a6e427465a2f829272f5863986dfa80"
发送请求
# 发送请求,这里的请求方式是get方法
response = requests.get(url, headers = head)
获取响应的数据
# 获取响应的数据
res_text = response.text
数据解析
使用 lxml 库中的 etree 方法
并将获取到的数据写入到一个html的文件中,进入这个文件可以通过浏览器打开,查看是否是我们将要获取视频的页面
tree = etree.HTML(res_text)
with open("bili2.html", "w", encoding="utf-8") as f:
f.write(res_text)
获取存放视频和音频数据的"window.–playinfo–"文本内容
因为视频和音频的数据都存在window.–playinfo–中,因此我们需要在元素栏下通过标签定位到它,但是我们只需要其内容
因为window.–playinfo–的内容是一个大json字符串,所以我们可以通过json.loads的方法将它变成一个字典,方便后面通过键来取视频和音频的数据
base_info = "".join(tree.xpath("/html/head/script[4]/text()"))[20:]
info_dict = json.loads(base_info)
分别获取视频和音频的url
在元素栏中可以看出window.–playinfo–的内容太多了,不利于我们寻找视频和音频的数据,我们可以在网络栏下,名称中第一个数据的响应中也可以找到,耐心一点向下慢慢通过标签找到window.–playinfo–,再在其中找到视频和音频的baseUrl
获取后,再次通过get请求方式,发送请求
注意:图片,视频和音频都是二进制内容,所以用content属性获取
video_url = info_dict["data"]["dash"]['video'][0]["baseUrl"]
audio_url = info_dict["data"]["dash"]['audio'][0]["baseUrl"]
video_content = requests.get(video_url, headers=head).content
audio_content = requests.get(audio_url, headers=head).content
最后将获取到的视频和音频的数据分别存放在两个不同的文件中,视频可以是MP4或者是wmv格式,音频是MP4格式
with open("video2.wmv", "wb") as f:
f.write(video_content)
with open("audio2.mp4", "wb") as fp:
fp.write(audio_content)
import requests from lxml import etree import json if __name__ == '__main__': # UA伪装 head = { "User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36 Edg/127.0.0.0" # 防盗链子 , "Referer":"https://www.bilibili.com/" , "Cookie":"CURRENT_FNVAL=4048; buvid3=BE2D386A-BBCB-E06E-8C2B-F5223B4C8BC517591infoc; b_nut=1721567317; _uuid=67165DF10-7B77-BDE8-3C63-732C2FCAF4D520375infoc; enable_web_push=DISABLE; buvid4=0245F01B-6C4B-CD5A-2EC5-BC060EC0777D18433-024072113-zRTpkL0r94scQqxGfSYKhQ%3D%3D; home_feed_column=5; header_theme_version=CLOSE; rpdid=|(Y|RJRR)Y~0J'u~kulY~Rkk; DedeUserID=1611307689; DedeUserID__ckMd5=b0865dba0b3ced5b; buvid_fp_plain=undefined; is-2022-channel=1; b_lsid=D8542F24_191412D93C0; bsource=search_bing; bmg_af_switch=1; bmg_src_def_domain=i1.hdslb.com; browser_resolution=1659-943; bili_ticket=eyJhbGciOiJIUzI1NiIsImtpZCI6InMwMyIsInR5cCI6IkpXVCJ9.eyJleHAiOjE3MjM2MzQ1OTMsImlhdCI6MTcyMzM3NTMzMywicGx0IjotMX0.Ox8rnEpQH5i1H_wQfH2z5CzZC0y8PlqQCy1KVa8XEfQ; bili_ticket_expires=1723634533; SESSDATA=f567fef6%2C1738927393%2C5d207%2A82CjAh2pSUKwDLr1XiI6ncU5B6NXEfWKS7ES6mDC8yGxM6aT3-BTdvK0KAlYpMhCXtEXgSVkl2aTlQWUNacTZOZ0ZNXzJwZ21QT2ozMXFXcWtFc1FpNnBIWlNWbml2Y3BxNV80bUNMZTBVN1dyb3h0STU1ZklDM0MwckJvanRmTmNkeTBFcW5qYl9RIIEC; bili_jct=8d788bcb503d69ba2ded7dfbb53f6e58; sid=71po5kkf; fingerprint=0c7279b7c69b9542a76b8d9df9b7872a; buvid_fp=BE2D386A-BBCB-E06E-8C2B-F5223B4C8BC517591infoc; bp_t_offset_1611307689=964382000909647872" } # 1、指定url url = "https://www.bilibili.com/video/BV17w4m1e7PT/?spm_id_from=333.1007.tianma.1-1-1.click&vd_source=2a6e427465a2f829272f5863986dfa80" # 2、发送请求 response = requests.get(url, headers = head) # 3、获取响应的数据 res_text = response.text # 4、数据解析 tree = etree.HTML(res_text) with open("bili2.html", "w", encoding="utf-8") as f: f.write(res_text) base_info = "".join(tree.xpath("/html/head/script[4]/text()"))[20:] info_dict = json.loads(base_info) video_url = info_dict["data"]["dash"]['video'][0]["baseUrl"] audio_url = info_dict["data"]["dash"]['audio'][0]["baseUrl"] video_content = requests.get(video_url, headers=head).content audio_content = requests.get(audio_url, headers=head).content with open("video2.wmv", "wb") as f: f.write(video_content) with open("audio2.mp4", "wb") as fp: fp.write(audio_content)
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