youku.py

# coding: utf-8

import json
import math
import random
import re
import time

from .common import InfoExtractor
from ..utils import (
    ExtractorError,
)


class YoukuIE(InfoExtractor):
    _VALID_URL =  r'(?:(?:http://)?(?:v|player)\.youku\.com/(?:v_show/id_|player\.php/sid/)|youku:)(?P<ID>[A-Za-z0-9]+)(?:\.html|/v\.swf|)'
    _TEST =   {
        u"url": u"http://v.youku.com/v_show/id_XNDgyMDQ2NTQw.html",
        u"file": u"XNDgyMDQ2NTQw_part00.flv",
        u"md5": u"ffe3f2e435663dc2d1eea34faeff5b5b",
        u"params": {u"test": False},
        u"info_dict": {
            u"title": u"youtube-dl test video \"'/\\ä↭𝕐"
        }
    }


    def _gen_sid(self):
        nowTime = int(time.time() * 1000)
        random1 = random.randint(1000,1998)
        random2 = random.randint(1000,9999)

        return "%d%d%d" %(nowTime,random1,random2)

    def _get_file_ID_mix_string(self, seed):
        mixed = []
        source = list("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/\:._-1234567890")
        seed = float(seed)
        for i in range(len(source)):
            seed  =  (seed * 211 + 30031) % 65536
            index  =  math.floor(seed / 65536 * len(source))
            mixed.append(source[int(index)])
            source.remove(source[int(index)])
        #return ''.join(mixed)
        return mixed

    def _get_file_id(self, fileId, seed):
        mixed = self._get_file_ID_mix_string(seed)
        ids = fileId.split('*')
        realId = []
        for ch in ids:
            if ch:
                realId.append(mixed[int(ch)])
        return ''.join(realId)

    def _real_extract(self, url):
        if url.find('/embed/') != -1:
            video_id = url.split('/')[-1]
        else:
            mobj = re.match(self._VALID_URL, url)
            if mobj is None:
                raise ExtractorError(u'Invalid URL: %s' % url)
            video_id = mobj.group('ID')

        info_url = 'http://v.youku.com/player/getPlayList/VideoIDS/' + video_id

        jsondata = self._download_webpage(info_url, video_id)

        self.report_extraction(video_id)
        files_info=[]
        for fm in ['hd2', 'flv', 'mp4']:
            try:
                config = json.loads(jsondata)
                error_code = config['data'][0].get('error_code')
                if error_code:
                    # -8 means blocked outside China.
                    error = config['data'][0].get('error')  # Chinese and English, separated by newline.
                    raise ExtractorError(error or u'Server reported error %i' % error_code,
                        expected=True)

                video_title =  config['data'][0]['title']
                seed = config['data'][0]['seed']

                format = self._downloader.params.get('format', None)
                supported_format = list(config['data'][0]['streamfileids'].keys())

                # if format is None or format == 'best':
                #     if 'hd2' in supported_format:
                #         format = 'hd2'
                #     else:
                #         format = 'flv'
                #     ext = u'flv'
                # elif format == 'worst':
                #     format = 'mp4'
                #     ext = u'mp4'
                # else:
                #     format = 'flv'
                #     ext = u'flv'
                if fm in supported_format:
                    format = fm
                    ext = fm
                else:
                    continue

                fileid = config['data'][0]['streamfileids'][format]
                keys = [s['k'] for s in config['data'][0]['segs'][format]]
                # segs is usually a dictionary, but an empty *list* if an error occured.
            except (UnicodeDecodeError, ValueError, KeyError):
                raise ExtractorError(u'Unable to extract info section')

            sid = self._gen_sid()
            fileid = self._get_file_id(fileid, seed)

            #column 8,9 of fileid represent the segment number
            #fileid[7:9] should be changed
            for index, key in enumerate(keys):

                temp_fileid = '%s%02X%s' % (fileid[0:8], index, fileid[10:])
                # download_url = 'http://f.youku.com/player/getFlvPath/sid/%s_%02X/st/flv/fileid/%s?k=%s' % (sid, index, temp_fileid, key)
                download_url = 'http://k.youku.com/player/getFlvPath/sid/%s_%02X/st/flv/fileid/%s?k=%s' % (sid, index, temp_fileid, key)

                # k = 4f52ab0db93b51612411f4c1
                # seconds = 367
                # ip = 3672973071
                # #?start=0&K={k}&hd=0&myp=0&ts={seconds}&ypp=0&ctype=10&ev=1&token=7794&oip={ip}&ep={ep}&yxon=1&special=true

                # yxon 없으니 바로 다운로드 됨

                # 모르는 파람
                # ep - XcKiV0QMPvY8cyG3ppqBxNNwV6RIZfjiSplnikQPGu9JZVFts0BSPa%2BxE4xA9Ge%2BEXrINShsbDf0iotn8eNziMBUvLKnJU6vq2cVWYo5RtL9pnxjiw2%2F4mZto4g6%2BAyJ21O5Jrrm03w%3D
                # token - 7794


                info = {
                    'id': '%s_part%02d' % (video_id, index),
                    'url': download_url,
                    'uploader': None,
                    'upload_date': None,
                    'title': video_title,
                    'ext': ext,
                }
                files_info.append(info)

        return files_info