import re

import os

import time

import requests

from contextlib import closing

 

class KeepReptile(object):

    def __init__(self, url, headers, keep_suburl, keep_video_suburl):

        self.url = url

        self.headers = headers

        self.keep_suburl = keep_suburl

        self.keep_video_suburl = keep_video_suburl

    

 

    def get_download_video(self):

        download_video = {}

        html_text = requests.get(self.url, headers=self.headers).text

 

        classification_urls = re.findall('/workouthashtags/w*', html_text, re.S)

        # video_ids = re.findall('(<a href="/workouthashtags/)^[a-z][0-9]$', html_text, re.S)

        #分类url

        for classification_url in classification_urls:

            new_classification_url = self.keep_suburl + classification_url 

            html_text = requests.get(new_classification_url, headers=self.headers).text

            subclassification_urls = re.findall('/plans/w*', html_text, re.S)

            #子分类url

            for subclassification_url in subclassification_urls:

                new_subclassification_url = self.keep_suburl + subclassification_url

                html_text = requests.get(new_subclassification_url, headers=self.headers).text

                action_urls = re.findall('/exercises/w*', html_text, re.S)

                

                #动作分类url

                for action_url in action_urls:

                    new_action_url = self.keep_suburl + action_url

                    html_text = requests.get(new_action_url, headers=self.headers).text

                    video_urls = re.findall('/chaos/w*/w*.mp4', html_text, re.S)

                    actions_names = re.findall('<h2 class="name">(.*?)</h2>', html_text, re.S)

                    #video url

                    for action_name, video_url in zip(actions_names, video_urls):

                        final_video_url = self.keep_video_suburl + video_url

                        print(action_name, final_video_url)

                        download_video[action_name] = final_video_url

                        # download_url.append(final_video_url)

        return download_video

 

    def download_video(self, video_path, action_name, video):

        video_name = video_path + action_name + '.mp4'

        print('video_name:', video_name)

        with closing(requests.get(video, headers=self.headers, stream=True, verify=False)) as res:

            chunk_size = 1024*10

            content_size = int(res.headers['content-length'])

            if os.path.exists(video_name) and os.path.getsize(video_name)>=content_size:

                print('已下载')

                return

            if res.status_code == 200:

                print('开始下载')

                with open(video_name, "wb") as f:

                    p = ProgressData(size = content_size, unit='Kb', block=chunk_size, file_name=video_name)

                    for chunk in res.iter_content(chunk_size=chunk_size):

                        if chunk:

                            f.write(chunk)

                            p.output()

 

class ProgressData(object):

 

    def __init__(self, block,size, unit, file_name='', ):

        self.file_name = file_name

        self.block = block/1000.0

        self.size = size/1000.0

        self.unit = unit

        self.count = 0

        self.start = time.time()

    def output(self):

        self.end = time.time()

        self.count += 1

        speed = self.block/(self.end-self.start) if (self.end-self.start)>0 else 0

        self.start = time.time()

        loaded = self.count*self.block

        progress = round(loaded/self.size, 4)

        if loaded >= self.size:

            print('%s下载完成 '%self.file_name)

        else:

            print('{0}下载进度{1:.2f}{2}/{3:.2f}{4} {5:.2%} 下载速度{6:.2f}{7}/s'.format(self.file_name, loaded, self.unit, self.size, self.unit, progress, speed, self.unit))

            print('%50s'%('/'*int((1-progress)*50)))

 

def main():

    headers = {'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.163 Safari/537.36'}

    url = 'https://www.gotokeep.com/training'

    keep_suburl = 'https://www.gotokeep.com'

    keep_video_suburl = 'https://static1.keepcdn.com'

    video_path = 'G:/zh/zh/reptile_video/keep_video/'

    k = KeepReptile(url, headers, keep_suburl, keep_video_suburl)

    video_disc = k.get_download_video()

    for action_name, video in video_disc.items():

        k.download_video(video_path ,action_name, video)

 

if __name__ == "__main__":

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