From b3ee552e4b918fb720111b23147e24fa5475a74b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michal=20=C4=8Ciha=C5=99?= <michal@cihar.com>
Date: Tue, 31 Jan 2017 07:54:53 +0100
Subject: [PATCH] [utils] Handle single-line comments in js_to_json

---
 test/test_utils.py  | 3 +++
 youtube_dl/utils.py | 4 ++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/test/test_utils.py b/test/test_utils.py
index a74d59f34..954bb7d8b 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -791,6 +791,9 @@ class TestUtil(unittest.TestCase):
         on = js_to_json('{ 0: /* " \n */ ",]" , }')
         self.assertEqual(json.loads(on), {'0': ',]'})
 
+        on = js_to_json('{ 0: // comment\n1 }')
+        self.assertEqual(json.loads(on), {'0': 1})
+
         on = js_to_json(r'["<p>x<\/p>"]')
         self.assertEqual(json.loads(on), ['<p>x</p>'])
 
diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index cf46711b9..6c462625b 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -2107,7 +2107,7 @@ def js_to_json(code):
         v = m.group(0)
         if v in ('true', 'false', 'null'):
             return v
-        elif v.startswith('/*') or v == ',':
+        elif v.startswith('/*') or v.startswith('//') or v == ',':
             return ""
 
         if v[0] in ("'", '"'):
@@ -2134,7 +2134,7 @@ def js_to_json(code):
     return re.sub(r'''(?sx)
         "(?:[^"\\]*(?:\\\\|\\['"nurtbfx/\n]))*[^"\\]*"|
         '(?:[^'\\]*(?:\\\\|\\['"nurtbfx/\n]))*[^'\\]*'|
-        /\*.*?\*/|,(?=\s*[\]}])|
+        /\*.*?\*/|//[^\n]*|,(?=\s*[\]}])|
         [a-zA-Z_][.a-zA-Z_0-9]*|
         \b(?:0[xX][0-9a-fA-F]+|0+[0-7]+)(?:\s*:)?|
         [0-9]+(?=\s*:)