[e621] match 'tag' search URLs with empty tag (#6783)

gallery_dl/extractor/e621.py

@@ -90,7 +90,7 @@ BASE_PATTERN = E621Extractor.update({
 
 class E621TagExtractor(E621Extractor, danbooru.DanbooruTagExtractor):
     """Extractor for e621 posts from tag searches"""
-    pattern = BASE_PATTERN + r"/posts?(?:\?.*?tags=|/index/\d+/)([^&#]+)"
+    pattern = BASE_PATTERN + r"/posts?(?:\?[^#]*?tags=|/index/\d+/)([^&#]*)"
     example = "https://e621.net/posts?tags=TAG"
 
 

test/results/e621.py

@@ -29,6 +29,12 @@ __tests__ = (
     "#class"   : e621.E621TagExtractor,
 },
 
+{
+    "#url"     : "https://e621.net/post?tags=",
+    "#category": ("E621", "e621", "tag"),
+    "#class"   : e621.E621TagExtractor,
+},
+
 {
     "#url"     : "https://e621.net/pools/73",
     "#category": ("E621", "e621", "pool"),