From b3e08a36e9d0dc679c8fb2499be9d45dc2b99fa6 Mon Sep 17 00:00:00 2001
From: Barna Zsombor <unibro@mailo.com>
Date: Thu, 19 Sep 2019 22:21:40 +0200
Subject: [PATCH] [dlive] Add useful error message

---
 youtube_dl/extractor/dlive.py | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/youtube_dl/extractor/dlive.py b/youtube_dl/extractor/dlive.py
index d95c67a5b..02a11e664 100644
--- a/youtube_dl/extractor/dlive.py
+++ b/youtube_dl/extractor/dlive.py
@@ -4,7 +4,10 @@ import json
 import re
 
 from .common import InfoExtractor
-from ..utils import int_or_none
+from ..utils import (
+    int_or_none,
+    ExtractorError,
+)
 
 
 class DLiveVODIE(InfoExtractor):
@@ -76,7 +79,14 @@ class DLiveStreamIE(InfoExtractor):
     username
   }
 }''' % display_name}).encode())['data']['userByDisplayName']
+
         livestream = user['livestream']
+
+        if(livestream is None):
+            raise ExtractorError(
+                "The requested stream is offline!",
+                expected=True)
+
         title = livestream['title']
         username = user['username']
         formats = self._extract_m3u8_formats(