debian/control: Remove trailing whitespace at EOF.

[youtubedl] / youtube_dl / extractor / scrippsnetworks.py

diff --git a/youtube_dl/extractor/scrippsnetworks.py b/youtube_dl/extractor/scrippsnetworks.py
index b446a02bace5f3e2679db7579a38e106c4f681ad..4023aeef81e4b4094744b89842c3aab5576a61ab 100644 (file)
--- a/youtube_dl/extractor/scrippsnetworks.py
+++ b/youtube_dl/extractor/scrippsnetworks.py
@@ -1,13 +1,11 @@
 # coding: utf-8
 from __future__ import unicode_literals
 
-import datetime
 import json
 import hashlib
-import hmac
 import re
 
-from .common import InfoExtractor
+from .aws import AWSIE
 from .anvato import AnvatoIE
 from ..utils import (
     smuggle_url,
@@ -16,7 +14,7 @@ from ..utils import (
 )
 
 
-class ScrippsNetworksWatchIE(InfoExtractor):
+class ScrippsNetworksWatchIE(AWSIE):
     IE_NAME = 'scrippsnetworks:watch'
     _VALID_URL = r'''(?x)
                     https?://
@@ -64,44 +62,27 @@ class ScrippsNetworksWatchIE(InfoExtractor):
         'travelchannel': 'trav',
         'geniuskitchen': 'genius',
     }
-    _SNI_HOST = 'web.api.video.snidigital.com'
 
-    _AWS_REGION = 'us-east-1'
-    _AWS_IDENTITY_ID_JSON = json.dumps({
-        'IdentityId': '%s:7655847c-0ae7-4d9b-80d6-56c062927eb3' % _AWS_REGION
-    })
-    _AWS_USER_AGENT = 'aws-sdk-js/2.80.0 callback'
     _AWS_API_KEY = 'E7wSQmq0qK6xPrF13WmzKiHo4BQ7tip4pQcSXVl1'
-    _AWS_SERVICE = 'execute-api'
-    _AWS_REQUEST = 'aws4_request'
-    _AWS_SIGNED_HEADERS = ';'.join([
-        'host', 'x-amz-date', 'x-amz-security-token', 'x-api-key'])
-    _AWS_CANONICAL_REQUEST_TEMPLATE = '''GET
-%(uri)s
-
-host:%(host)s
-x-amz-date:%(date)s
-x-amz-security-token:%(token)s
-x-api-key:%(key)s
+    _AWS_PROXY_HOST = 'web.api.video.snidigital.com'
 
-%(signed_headers)s
-%(payload_hash)s'''
+    _AWS_USER_AGENT = 'aws-sdk-js/2.80.0 callback'
 
     def _real_extract(self, url):
         mobj = re.match(self._VALID_URL, url)
         site_id, video_id = mobj.group('site', 'id')
 
-        def aws_hash(s):
-            return hashlib.sha256(s.encode('utf-8')).hexdigest()
-
+        aws_identity_id_json = json.dumps({
+            'IdentityId': '%s:7655847c-0ae7-4d9b-80d6-56c062927eb3' % self._AWS_REGION
+        }).encode('utf-8')
         token = self._download_json(
-            'https://cognito-identity.us-east-1.amazonaws.com/', video_id,
-            data=self._AWS_IDENTITY_ID_JSON.encode('utf-8'),
+            'https://cognito-identity.%s.amazonaws.com/' % self._AWS_REGION, video_id,
+            data=aws_identity_id_json,
             headers={
                 'Accept': '*/*',
                 'Content-Type': 'application/x-amz-json-1.1',
                 'Referer': url,
-                'X-Amz-Content-Sha256': aws_hash(self._AWS_IDENTITY_ID_JSON),
+                'X-Amz-Content-Sha256': hashlib.sha256(aws_identity_id_json).hexdigest(),
                 'X-Amz-Target': 'AWSCognitoIdentityService.GetOpenIdToken',
                 'X-Amz-User-Agent': self._AWS_USER_AGENT,
             })['Token']
@@ -124,64 +105,12 @@ x-api-key:%(key)s
                 sts, './/{https://sts.amazonaws.com/doc/2011-06-15/}%s' % key,
                 fatal=True)
 
-        access_key_id = get('AccessKeyId')
-        secret_access_key = get('SecretAccessKey')
-        session_token = get('SessionToken')
-
-        # Task 1: http://docs.aws.amazon.com/general/latest/gr/sigv4-create-canonical-request.html
-        uri = '/1/web/brands/%s/episodes/scrid/%s' % (self._SNI_TABLE[site_id], video_id)
-        datetime_now = datetime.datetime.utcnow().strftime('%Y%m%dT%H%M%SZ')
-        date = datetime_now[:8]
-        canonical_string = self._AWS_CANONICAL_REQUEST_TEMPLATE % {
-            'uri': uri,
-            'host': self._SNI_HOST,
-            'date': datetime_now,
-            'token': session_token,
-            'key': self._AWS_API_KEY,
-            'signed_headers': self._AWS_SIGNED_HEADERS,
-            'payload_hash': aws_hash(''),
-        }
-
-        # Task 2: http://docs.aws.amazon.com/general/latest/gr/sigv4-create-string-to-sign.html
-        credential_string = '/'.join([date, self._AWS_REGION, self._AWS_SERVICE, self._AWS_REQUEST])
-        string_to_sign = '\n'.join([
-            'AWS4-HMAC-SHA256', datetime_now, credential_string,
-            aws_hash(canonical_string)])
-
-        # Task 3: http://docs.aws.amazon.com/general/latest/gr/sigv4-calculate-signature.html
-        def aws_hmac(key, msg):
-            return hmac.new(key, msg.encode('utf-8'), hashlib.sha256)
-
-        def aws_hmac_digest(key, msg):
-            return aws_hmac(key, msg).digest()
-
-        def aws_hmac_hexdigest(key, msg):
-            return aws_hmac(key, msg).hexdigest()
-
-        k_secret = 'AWS4' + secret_access_key
-        k_date = aws_hmac_digest(k_secret.encode('utf-8'), date)
-        k_region = aws_hmac_digest(k_date, self._AWS_REGION)
-        k_service = aws_hmac_digest(k_region, self._AWS_SERVICE)
-        k_signing = aws_hmac_digest(k_service, self._AWS_REQUEST)
-
-        signature = aws_hmac_hexdigest(k_signing, string_to_sign)
-
-        auth_header = ', '.join([
-            'AWS4-HMAC-SHA256 Credential=%s' % '/'.join(
-                [access_key_id, date, self._AWS_REGION, self._AWS_SERVICE, self._AWS_REQUEST]),
-            'SignedHeaders=%s' % self._AWS_SIGNED_HEADERS,
-            'Signature=%s' % signature,
-        ])
-
-        mcp_id = self._download_json(
-            'https://%s%s' % (self._SNI_HOST, uri), video_id, headers={
-                'Accept': '*/*',
-                'Referer': url,
-                'Authorization': auth_header,
-                'X-Amz-Date': datetime_now,
-                'X-Amz-Security-Token': session_token,
-                'X-Api-Key': self._AWS_API_KEY,
-            })['results'][0]['mcpId']
+        mcp_id = self._aws_execute_api({
+            'uri': '/1/web/brands/%s/episodes/scrid/%s' % (self._SNI_TABLE[site_id], video_id),
+            'access_key': get('AccessKeyId'),
+            'secret_key': get('SecretAccessKey'),
+            'session_token': get('SessionToken'),
+        }, video_id)['results'][0]['mcpId']
 
         return self.url_result(
             smuggle_url(