每日将b站top100视频下载到本地

说明

目标是每日爬取b站当日top100的视频并下载到本地，目标网址：传送门

实现

核心代码如下：

# !/usr/bin/env python
# -*-coding:utf-8-*-

import requests
import random
import time
import os
import sys

from ..utils import Mp4info

class DownloadVideo:

	def __init__( self ):
		self.api_url = 'http://api.vc.bilibili.com/board/v1/ranking/top?'

	def _getJson(self, url, num):
		headers = {
			'User-Agent':
				'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36'
		}

		params = {
			'page_size'  : 10,
			'next_offset': str(num),
			'tag'        : '今日热门',
			'platform'   : 'pc'
		}

		try:
			html = requests.get(url, params = params, headers = headers, verify = False, timeout = 2)
			return html.json()

		except BaseException:
			print('request error')
			pass


	def _download(self, url, path ):
		start = time.time()  # 开始时间
		size = 0
		headers = {
			'User-Agent':
				'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36'
		}

		response = requests.get(url, headers = headers, stream = True, verify = False, timeout = 2)  # stream属性必须带上
		chunk_size = 1024  # 每次下载的数据大小
		content_size = int(response.headers['content-length'])  # 总大小
		if response.status_code == 200:
			print('[文件大小]:%0.2f MB' % (content_size / chunk_size / 1024))  # 换算单位
			with open(path, 'wb') as file:
				for data in response.iter_content(chunk_size = chunk_size):
					file.write(data)
					size += len(data)  # 已下载的文件大小

	def _dispatcher(self):

		for i in range(10):
			url = self.api_url
			num = i * 10 + 1
			html = self._getJson(url, num)
			infos = html['data']['items']
			for info in infos:
				title = info['item']['description']  # 小视频的标题
				print(title)
				video_url = info['item']['video_playurl']  # 小视频的下载链接

				try:
					# 获得视频时长
					file = Mp4info(video_url)
					duration = file.get_duration()
					print('duration', duration)
					if duration > 60 * 60:
						continue
				except BaseException:
					continue


				# 为了防止有些视频没有提供下载链接的情况
				try:
					currentVideoPath = os.path.join(sys.path[0], 'bilibili_video')  # 当前目录作为下载目录
					# 创建文件夹存放下载的视频
					if not os.path.exists(currentVideoPath):
						os.makedirs(currentVideoPath)

					self._download(video_url, path = '{}/{}.mp4'.format(currentVideoPath,title))
					print('成功下载一个!')

				except BaseException:
					print('凉凉,下载失败')
					pass

			time.sleep(int(format(random.randint(2, 8))))  # 设置随机等待时间

	def run(self):
		self._dispatcher()

运行：

curl -d "task_id=12345" http://127.0.0.1:5000/spider/bilibili/addjob

结果：