Usage
下载仓库
git@github.com:inspurer/PythonSpider.git
替换
随便打开一个b站的界面，比如
13236872-f0d2ec6b87301c05.png
将url复制到代码中去，运行代码，稍等一会儿，上述图中的视频就被下载下来了。
How to Code
分析网页源码
按f12浏览器开发者工具 ，通过一番审查，我们定位到视频的url在网页源代码的位置如下：
window.__playinfo__={"from":"local","result":"suee","quality":32,"format":"flv480","timelength":408884,"accept_format":"flv720,flv480,flv360","accept_description":["高清 720P","清晰 480P","流畅 360P"],"accept_quality":[64,32,15],"video_codecid":7,"video_project":true,"seek_param":"start","seek_type":"offset","durl":[{"order":1,"length":408884,"size":42782550,"ahead":"EhA=","vhead":"AWQAHv/hAB5nZAAerNlA2D3n//AoACfxAAADAAEAAAMAMA8WLZYBAAVo6+zyPA==","url":"http://upos-hz-mirrorkodo.acgvideo.com/upgcxcode/48/61/45596148/45596148-1-32.flv?e=ig8euxZM2rNcNbRa7b4VhoMz7WhjhwdEto8g5X10ugNcXBlqNxHxNEVE5XREto8KqJZHUa6m5J0SqE85tZvEuENvNC8xNEVE9EKE9IMvXBvE2ENvNCImNEVEK9GVqJIwqa80WXIekXRE9IB5QK==&deadline=1543136253&dynamic=1&gen=playurl&oi=1862807981&os=kodo&platform=pc&rate=176800&trid=69ea1a81ac21448f9e2189ef479a2d6d&uipk=5&uipv=5&um_deadline=1543136253&um_sign=c479f3fd3075b359d0a04e5eb584ac55&upsig=1c05ca3838af92d2c1411cf3000e8345http://upos-hz-mirrorkodo.acgvideo.com/upgcxcode/48/61/45596148/45596148-1-32.flv?e=ig8euxZM2rNcNbRa7b4VhoMz7WhjhwdEto8g5X10ugNcXBlqNxHxNEVE5XREto8KqJZHUa6m5J0SqE85tZvEuENvNC8xNEVE9EKE9IMvXBvE2ENvNCImNEVEK9GVqJIwqa80WXIekXRE9IB5QK==&deadline=1543136253&dynamic=1&gen=playurl&oi=1862807981&os=kodo&platform=pc&rate=176800&trid=69ea1a81ac21448f9e2189ef479a2d6d&uipk=5&uipv=5&um_deadline=1543136253&um_sign=c479f3fd3075b359d0a04e5eb584ac55&upsig=1c05ca3838af92d2c1411cf3000e8345","backup_url":["http://upos-hz-mirrorcos.acgvideo.com/upgcxcode/48/61/45596148/45596148-1-32.flv?um_deadline=1543136253&platform=pc&rate=176800&oi=1862807981&um_sign=c479f3fd3075b359d0a04e5eb584ac55&gen=playurl&os=cos&trid=69ea1a81ac21448f9e2189ef479a2d6d"]}]}最后的url就是我们想要的结果。
如果在浏览器中查找不方便的话，我们可以把通过代码把网页源码输出到本地
response = requests.get(url='https://www.bilibili.com/video/av26522634', headers= self.getHtmlHeaders) print(response.status_code) if response.status_code == 200: print(response.text)
为了伪装成浏览器，我们需要在reqests添加Headers
这个Headers需要我们去浏览器中手动获取
切换到NetWork标签下，再选择Headers，
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self.getHtmlHeaders={ 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36', 'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8', 'Accept-Encoding': 'gzip, deflate, br', 'Accept-Language': 'zh-CN,zh;q = 0.9'
}这里只选择了几个关键的
解析得到视频地址
根据上一步分析，我们得到了网页的源码，并在源码中定位到了视频地址，接下来，我们就用代码自动获取这个地址了
#用正则、json得到视频url;用pq失败后的无奈之举pattern = r'\<script\>window\.__playinfo__=(.*?)\</script\>'result = re.findall(pattern, html)[0] temp = json.loads(result)#temp['durl']是一个列表，里面有很多字典#video_url = temp['durl']for item in temp['durl']: if 'url' in item.keys(): video_url = item['url']
顺便获取下视频的名字：
#用pq解析得到视频标题doc = pq(html)
video_title = doc('#viewbox_report > h1 > span').text()然后组合返回下：
return{ 'title': video_title, 'url': video_url
}下载视频
通过在开发者工具中搜索关键词，比如上面得到的视频url，我们可以定位到在浏览器中真正下载视频的请求在哪
在这里插入图片描述
然后把它的Headers添加到reqests中，就可以下载视频了
with open(filename, "wb") as f: f.write(requests.get(url=url, headers=self.downloadVideoHeaders, stream=True, verify=False).content)
愉快地观看本地视频
在这里插入图片描述
作者：inspurer
链接：https://www.jianshu.com/p/27b08426d678