From 5b24f8f505582f353c3c2f7b79b5f67612ba9c87 Mon Sep 17 00:00:00 2001
From: 23rd <23rd@vivaldi.net>
Date: Sun, 3 Jan 2021 16:30:56 +0300
Subject: [PATCH] [twitch] Switch access token to GraphQL and refactor.

---
 youtube_dl/extractor/twitch.py | 114 ++++++++++++++++++++-------------
 1 file changed, 68 insertions(+), 46 deletions(-)

diff --git a/youtube_dl/extractor/twitch.py b/youtube_dl/extractor/twitch.py
index ab6654432..50dcb93ef 100644
--- a/youtube_dl/extractor/twitch.py
+++ b/youtube_dl/extractor/twitch.py
@@ -160,7 +160,64 @@ class TwitchBaseIE(InfoExtractor):
         return compat_str(self._parse_json(token, channel_name)['channel_id'])
 
 
-class TwitchVodIE(TwitchBaseIE):
+class TwitchGraphQLBaseIE(TwitchBaseIE):
+    _PAGE_LIMIT = 100
+
+    _OPERATION_HASHES = {
+        'CollectionSideBar': '27111f1b382effad0b6def325caef1909c733fe6a4fbabf54f8d491ef2cf2f14',
+        'FilterableVideoTower_Videos': 'a937f1d22e269e39a03b509f65a7490f9fc247d7f83d6ac1421523e3b68042cb',
+        'ClipsCards__User': 'b73ad2bfaecfd30a9e6c28fada15bd97032c83ec77a0440766a56fe0bd632777',
+        'ChannelCollectionsContent': '07e3691a1bad77a36aba590c351180439a40baefc1c275356f40fc7082419a84',
+        'StreamMetadata': '1c719a40e481453e5c48d9bb585d971b8b372f8ebb105b17076722264dfa5b3e',
+        'ComscoreStreamingQuery': 'e1edae8122517d013405f237ffcc124515dc6ded82480a88daef69c83b53ac01',
+        'VideoPreviewOverlay': '3006e77e51b128d838fa4e835723ca4dc9a05c5efd4466c1085215c6e437e65c',
+    }
+
+    def _download_base_gql(self, video_id, ops, note, fatal=True):
+        return self._download_json(
+            'https://gql.twitch.tv/gql', video_id, note,
+            data=json.dumps(ops).encode(),
+            headers={
+                'Content-Type': 'text/plain;charset=UTF-8',
+                'Client-ID': self._CLIENT_ID,
+            }, fatal=fatal)
+
+    def _download_gql(self, video_id, ops, note, fatal=True):
+        for op in ops:
+            op['extensions'] = {
+                'persistedQuery': {
+                    'version': 1,
+                    'sha256Hash': self._OPERATION_HASHES[op['operationName']],
+                }
+            }
+        return self._download_base_gql(video_id, ops, note)
+
+    def _download_access_token_gql(self, video_id, item_type=None):
+        if item_type == 'vod':
+            method = 'videoPlaybackAccessToken'
+            param_name = 'id'
+        else:
+            method = 'streamPlaybackAccessToken'
+            param_name = 'channelName'
+        ops = {
+            'query': '''{
+              %s(
+                %s: "%s",
+                  params: {
+                    platform: "web",
+                    playerBackend: "mediaplayer",
+                    playerType: "site"
+                  }) {
+                value
+                signature
+              }
+            }''' % (method, param_name, video_id),
+        }
+        note = 'Downloading access token GraphQL'
+        return self._download_base_gql(video_id, ops, note)['data'][method]
+
+
+class TwitchVodIE(TwitchGraphQLBaseIE):
     IE_NAME = 'twitch:vod'
     _VALID_URL = r'''(?x)
                     https?://
@@ -276,9 +333,7 @@ class TwitchVodIE(TwitchBaseIE):
         vod_id = self._match_id(url)
 
         info = self._download_info(vod_id)
-        access_token = self._call_api(
-            'api/vods/%s/access_token' % vod_id, vod_id,
-            'Downloading %s access token' % self._ITEM_TYPE)
+        access_token = self._download_access_token_gql(vod_id, self._ITEM_TYPE)
 
         formats = self._extract_m3u8_formats(
             '%s/vod/%s.m3u8?%s' % (
@@ -289,8 +344,8 @@ class TwitchVodIE(TwitchBaseIE):
                     'allow_spectre': 'true',
                     'player': 'twitchweb',
                     'playlist_include_framerate': 'true',
-                    'nauth': access_token['token'],
-                    'nauthsig': access_token['sig'],
+                    'nauth': access_token['value'],
+                    'nauthsig': access_token['signature'],
                 })),
             vod_id, 'mp4', entry_protocol='m3u8_native')
 
@@ -333,36 +388,6 @@ def _make_video_result(node):
     }
 
 
-class TwitchGraphQLBaseIE(TwitchBaseIE):
-    _PAGE_LIMIT = 100
-
-    _OPERATION_HASHES = {
-        'CollectionSideBar': '27111f1b382effad0b6def325caef1909c733fe6a4fbabf54f8d491ef2cf2f14',
-        'FilterableVideoTower_Videos': 'a937f1d22e269e39a03b509f65a7490f9fc247d7f83d6ac1421523e3b68042cb',
-        'ClipsCards__User': 'b73ad2bfaecfd30a9e6c28fada15bd97032c83ec77a0440766a56fe0bd632777',
-        'ChannelCollectionsContent': '07e3691a1bad77a36aba590c351180439a40baefc1c275356f40fc7082419a84',
-        'StreamMetadata': '1c719a40e481453e5c48d9bb585d971b8b372f8ebb105b17076722264dfa5b3e',
-        'ComscoreStreamingQuery': 'e1edae8122517d013405f237ffcc124515dc6ded82480a88daef69c83b53ac01',
-        'VideoPreviewOverlay': '3006e77e51b128d838fa4e835723ca4dc9a05c5efd4466c1085215c6e437e65c',
-    }
-
-    def _download_gql(self, video_id, ops, note, fatal=True):
-        for op in ops:
-            op['extensions'] = {
-                'persistedQuery': {
-                    'version': 1,
-                    'sha256Hash': self._OPERATION_HASHES[op['operationName']],
-                }
-            }
-        return self._download_json(
-            'https://gql.twitch.tv/gql', video_id, note,
-            data=json.dumps(ops).encode(),
-            headers={
-                'Content-Type': 'text/plain;charset=UTF-8',
-                'Client-ID': self._CLIENT_ID,
-            }, fatal=fatal)
-
-
 class TwitchCollectionIE(TwitchGraphQLBaseIE):
     _VALID_URL = r'https?://(?:(?:www|go|m)\.)?twitch\.tv/collections/(?P<id>[^/]+)'
 
@@ -814,8 +839,8 @@ class TwitchStreamIE(TwitchGraphQLBaseIE):
         if not stream:
             raise ExtractorError('%s is offline' % channel_name, expected=True)
 
-        access_token = self._download_access_token(channel_name)
-        token = access_token['token']
+        access_token = self._download_access_token_gql(channel_name)
+        token = access_token['value']
 
         stream_id = stream.get('id') or channel_name
         query = {
@@ -826,7 +851,7 @@ class TwitchStreamIE(TwitchGraphQLBaseIE):
             'player': 'twitchweb',
             'playlist_include_framerate': 'true',
             'segment_preference': '4',
-            'sig': access_token['sig'].encode('utf-8'),
+            'sig': access_token['signature'].encode('utf-8'),
             'token': token.encode('utf-8'),
         }
         formats = self._extract_m3u8_formats(
@@ -866,7 +891,7 @@ class TwitchStreamIE(TwitchGraphQLBaseIE):
         }
 
 
-class TwitchClipsIE(TwitchBaseIE):
+class TwitchClipsIE(TwitchGraphQLBaseIE):
     IE_NAME = 'twitch:clips'
     _VALID_URL = r'''(?x)
                     https?://
@@ -912,8 +937,8 @@ class TwitchClipsIE(TwitchBaseIE):
     def _real_extract(self, url):
         video_id = self._match_id(url)
 
-        clip = self._download_json(
-            'https://gql.twitch.tv/gql', video_id, data=json.dumps({
+        clip = self._download_base_gql(
+            video_id, {
                 'query': '''{
   clip(slug: "%s") {
     broadcaster {
@@ -937,10 +962,7 @@ class TwitchClipsIE(TwitchBaseIE):
     }
     viewCount
   }
-}''' % video_id,
-            }).encode(), headers={
-                'Client-ID': self._CLIENT_ID,
-            })['data']['clip']
+}''' % video_id}, 'Downloading clip GraphQL')['data']['clip']
 
         if not clip:
             raise ExtractorError(