_ Git - youtube-dl/blob - youtube_dl/extractor/scrippsnetworks.py

   1 # coding: utf-8
   2 from __future__ import unicode_literals
   3
   4 import datetime
   5 import json
   6 import hashlib
   7 import hmac
   8 import re
   9
  10 from .common import InfoExtractor
  11 from .anvato import AnvatoIE
  12 from ..utils import (
  13     urlencode_postdata,
  14     xpath_text,
  15 )
  16
  17
  18 class ScrippsNetworksWatchIE(InfoExtractor):
  19     IE_NAME = 'scrippsnetworks:watch'
  20     _VALID_URL = r'''(?x)
  21                     https?://
  22                         watch\.
  23                         (?P<site>hgtv|foodnetwork|travelchannel|diynetwork|cookingchanneltv)\.com/
  24                         (?:
  25                             player\.[A-Z0-9]+\.html\#|
  26                             show/(?:[^/]+/){2}
  27                         )
  28                         (?P<id>\d+)
  29                     '''
  30     _TESTS = [{
  31         'url': 'http://watch.hgtv.com/show/HGTVE/Best-Ever-Treehouses/2241515/Best-Ever-Treehouses/',
  32         'md5': '26545fd676d939954c6808274bdb905a',
  33         'info_dict': {
  34             'id': '4173834',
  35             'ext': 'mp4',
  36             'title': 'Best Ever Treehouses',
  37             'description': "We're searching for the most over the top treehouses.",
  38             'uploader': 'ANV',
  39             'upload_date': '20170922',
  40             'timestamp': 1506056400,
  41         },
  42         'params': {
  43             'skip_download': True,
  44         },
  45         'add_ie': [AnvatoIE.ie_key()],
  46     }, {
  47         'url': 'http://watch.diynetwork.com/show/DSAL/Salvage-Dawgs/2656646/Covington-Church/',
  48         'only_matching': True,
  49     }, {
  50         'url': 'http://watch.diynetwork.com/player.HNT.html#2656646',
  51         'only_matching': True,
  52     }]
  53
  54     _SNI_TABLE = {
  55         'hgtv': 'hgtv',
  56         'diynetwork': 'diy',
  57         'foodnetwork': 'food',
  58         'cookingchanneltv': 'cook',
  59         'travelchannel': 'trav',
  60         'geniuskitchen': 'geniuskitchen',
  61     }
  62     _SNI_HOST = 'web.api.video.snidigital.com'
  63
  64     _AWS_REGION = 'us-east-1'
  65     _AWS_IDENTITY_ID_JSON = json.dumps({
  66         'IdentityId': '%s:7655847c-0ae7-4d9b-80d6-56c062927eb3' % _AWS_REGION
  67     })
  68     _AWS_USER_AGENT = 'aws-sdk-js/2.80.0 callback'
  69     _AWS_API_KEY = 'E7wSQmq0qK6xPrF13WmzKiHo4BQ7tip4pQcSXVl1'
  70     _AWS_SERVICE = 'execute-api'
  71     _AWS_REQUEST = 'aws4_request'
  72     _AWS_SIGNED_HEADERS = ';'.join([
  73         'host', 'x-amz-date', 'x-amz-security-token', 'x-api-key'])
  74     _AWS_CANONICAL_REQUEST_TEMPLATE = '''GET
  75 %(uri)s
  76
  77 host:%(host)s
  78 x-amz-date:%(date)s
  79 x-amz-security-token:%(token)s
  80 x-api-key:%(key)s
  81
  82 %(signed_headers)s
  83 %(payload_hash)s'''
  84
  85     def _real_extract(self, url):
  86         mobj = re.match(self._VALID_URL, url)
  87         site_id, video_id = mobj.group('site', 'id')
  88
  89         def aws_hash(s):
  90             return hashlib.sha256(s.encode('utf-8')).hexdigest()
  91
  92         token = self._download_json(
  93             'https://cognito-identity.us-east-1.amazonaws.com/', video_id,
  94             data=self._AWS_IDENTITY_ID_JSON.encode('utf-8'),
  95             headers={
  96                 'Accept': '*/*',
  97                 'Content-Type': 'application/x-amz-json-1.1',
  98                 'Referer': url,
  99                 'X-Amz-Content-Sha256': aws_hash(self._AWS_IDENTITY_ID_JSON),
 100                 'X-Amz-Target': 'AWSCognitoIdentityService.GetOpenIdToken',
 101                 'X-Amz-User-Agent': self._AWS_USER_AGENT,
 102             })['Token']
 103
 104         sts = self._download_xml(
 105             'https://sts.amazonaws.com/', video_id, data=urlencode_postdata({
 106                 'Action': 'AssumeRoleWithWebIdentity',
 107                 'RoleArn': 'arn:aws:iam::710330595350:role/Cognito_WebAPIUnauth_Role',
 108                 'RoleSessionName': 'web-identity',
 109                 'Version': '2011-06-15',
 110                 'WebIdentityToken': token,
 111             }), headers={
 112                 'Referer': url,
 113                 'X-Amz-User-Agent': self._AWS_USER_AGENT,
 114                 'Content-Type': 'application/x-www-form-urlencoded; charset=utf-8',
 115             })
 116
 117         def get(key):
 118             return xpath_text(
 119                 sts, './/{https://sts.amazonaws.com/doc/2011-06-15/}%s' % key,
 120                 fatal=True)
 121
 122         access_key_id = get('AccessKeyId')
 123         secret_access_key = get('SecretAccessKey')
 124         session_token = get('SessionToken')
 125
 126         # Task 1: http://docs.aws.amazon.com/general/latest/gr/sigv4-create-canonical-request.html
 127         uri = '/1/web/brands/%s/episodes/scrid/%s' % (self._SNI_TABLE[site_id], video_id)
 128         datetime_now = datetime.datetime.utcnow().strftime('%Y%m%dT%H%M%SZ')
 129         date = datetime_now[:8]
 130         canonical_string = self._AWS_CANONICAL_REQUEST_TEMPLATE % {
 131             'uri': uri,
 132             'host': self._SNI_HOST,
 133             'date': datetime_now,
 134             'token': session_token,
 135             'key': self._AWS_API_KEY,
 136             'signed_headers': self._AWS_SIGNED_HEADERS,
 137             'payload_hash': aws_hash(''),
 138         }
 139
 140         # Task 2: http://docs.aws.amazon.com/general/latest/gr/sigv4-create-string-to-sign.html
 141         credential_string = '/'.join([date, self._AWS_REGION, self._AWS_SERVICE, self._AWS_REQUEST])
 142         string_to_sign = '\n'.join([
 143             'AWS4-HMAC-SHA256', datetime_now, credential_string,
 144             aws_hash(canonical_string)])
 145
 146         # Task 3: http://docs.aws.amazon.com/general/latest/gr/sigv4-calculate-signature.html
 147         def aws_hmac(key, msg):
 148             return hmac.new(key, msg.encode('utf-8'), hashlib.sha256)
 149
 150         def aws_hmac_digest(key, msg):
 151             return aws_hmac(key, msg).digest()
 152
 153         def aws_hmac_hexdigest(key, msg):
 154             return aws_hmac(key, msg).hexdigest()
 155
 156         k_secret = 'AWS4' + secret_access_key
 157         k_date = aws_hmac_digest(k_secret.encode('utf-8'), date)
 158         k_region = aws_hmac_digest(k_date, self._AWS_REGION)
 159         k_service = aws_hmac_digest(k_region, self._AWS_SERVICE)
 160         k_signing = aws_hmac_digest(k_service, self._AWS_REQUEST)
 161
 162         signature = aws_hmac_hexdigest(k_signing, string_to_sign)
 163
 164         auth_header = ', '.join([
 165             'AWS4-HMAC-SHA256 Credential=%s' % '/'.join(
 166                 [access_key_id, date, self._AWS_REGION, self._AWS_SERVICE, self._AWS_REQUEST]),
 167             'SignedHeaders=%s' % self._AWS_SIGNED_HEADERS,
 168             'Signature=%s' % signature,
 169         ])
 170
 171         mcp_id = self._download_json(
 172             'https://%s%s' % (self._SNI_HOST, uri), video_id, headers={
 173                 'Accept': '*/*',
 174                 'Referer': url,
 175                 'Authorization': auth_header,
 176                 'X-Amz-Date': datetime_now,
 177                 'X-Amz-Security-Token': session_token,
 178                 'X-Api-Key': self._AWS_API_KEY,
 179             })['results'][0]['mcpId']
 180
 181         return self.url_result(
 182             'anvato:anvato_scripps_app_web_prod_0837996dbe373629133857ae9eb72e740424d80a:%s' % mcp_id,
 183             AnvatoIE.ie_key(), video_id=mcp_id)