From 1baea2d4f33c9867eb41cd046c3215d109f233e0 Mon Sep 17 00:00:00 2001
From: Florian Staudacher <florian_staudacher@yahoo.de>
Date: Thu, 22 Oct 2020 19:16:49 +0200
Subject: [PATCH] handle different syntax for boolean values in js_to_json

---
 test/test_utils.py  | 6 ++++++
 youtube_dl/utils.py | 8 +++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/test/test_utils.py b/test/test_utils.py
index c2d1e4fb1..878ac6268 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -1000,6 +1000,12 @@ class TestUtil(unittest.TestCase):
         on = js_to_json('{ "040": "040" }')
         self.assertEqual(json.loads(on), {'040': '040'})
 
+        on = js_to_json('{ "defaultQuality":!0}')
+        self.assertEqual(json.loads(on), {'defaultQuality': 'true'})
+
+        on = js_to_json('{ "onFullscreen":!1}')
+        self.assertEqual(json.loads(on), {'onFullscreen': 'false'})
+
     def test_js_to_json_malformed(self):
         self.assertEqual(js_to_json('42a1'), '42"a1"')
         self.assertEqual(js_to_json('42a-1'), '42"a"-1')
diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index 737e2810e..2abd807b7 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -4081,6 +4081,11 @@ def js_to_json(code):
         elif v.startswith('/*') or v.startswith('//') or v == ',':
             return ""
 
+        if v == "!0":
+            v = 'true'
+        if v == "!1":
+            v = 'false'
+
         if v[0] in ("'", '"'):
             v = re.sub(r'(?s)\\.|"', lambda m: {
                 '"': '\\"',
@@ -4103,7 +4108,8 @@ def js_to_json(code):
         {comment}|,(?={skip}[\]}}])|
         (?:(?<![0-9])[eE]|[a-df-zA-DF-Z_])[.a-zA-Z_0-9]*|
         \b(?:0[xX][0-9a-fA-F]+|0+[0-7]+)(?:{skip}:)?|
-        [0-9]+(?={skip}:)
+        [0-9]+(?={skip}:)|
+        \![0-1]
         '''.format(comment=COMMENT_RE, skip=SKIP_RE), fix_kv, code)