import requests
import time
import random


# 获取网页原数据
def get_json(url):
    headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) 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, headers=headers, params=params)
        return html.json()
    except:
        print("请求错误")
        pass


# 下载视频
def downloader(url, path):
    start = time.time()  # 开始时间
    size = 0
    headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36'}
    response = requests.get(url, headers, stream=True)  # 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]：%0.2fMB' % (content_size / chunk_size / 1024))  # 换算单位
        with open(path, 'wb')as f:
            for data in response.iter_content(chunk_size=chunk_size):
                f.write(data)
                size += len(data)


if __name__ == '__main__':
    for i in range(10):
        url = 'http://101.133.210.230:5555/elab-marketing-user//activityProduction/like'
        num = i * 10 + 1
        html = get_json(url)
        infos = html['data']['items']
        for info in infos:
            title = info['item']['description']  # 小视频的标题
            video_url = info['item']['video_playurl']  # 视频地址
            print(title, video_url)
            # 为了防止视频没有video_url
            try:
                downloader(video_url, path="%s.mp4" % title)
                print("成功下载一个")
            except BaseException:
                print("下载失败")
                pass
        time.sleep(int(format(random.randint(2, 8))))  # 设置随机等待时间