From 1b6353064d8fa8c4f561b3ba86590fce68ba9c6f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mike=20F=C3=A4hrmann?= <mike_faehrmann@web.de>
Date: Wed, 12 Nov 2025 21:04:11 +0100
Subject: [PATCH] [rule34us:tag] support URLs with empty 'q' query parameter
 (#8546)

---
 gallery_dl/extractor/rule34us.py | 2 +-
 test/results/rule34us.py         | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/gallery_dl/extractor/rule34us.py b/gallery_dl/extractor/rule34us.py
index cd6e8b3b..d48539e2 100644
--- a/gallery_dl/extractor/rule34us.py
+++ b/gallery_dl/extractor/rule34us.py
@@ -57,7 +57,7 @@ class Rule34usTagExtractor(Rule34usExtractor):
     subcategory = "tag"
     directory_fmt = ("{category}", "{search_tags}")
     archive_fmt = "t_{search_tags}_{id}"
-    pattern = r"(?:https?://)?rule34\.us/index\.php\?r=posts/index&q=([^&#]+)"
+    pattern = r"(?:https?://)?rule34\.us/index\.php\?r=posts/index&q=([^&#]*)"
     example = "https://rule34.us/index.php?r=posts/index&q=TAG"
 
     def __init__(self, match):
diff --git a/test/results/rule34us.py b/test/results/rule34us.py
index 5f4f26c4..1f834bd1 100644
--- a/test/results/rule34us.py
+++ b/test/results/rule34us.py
@@ -14,6 +14,15 @@ __tests__ = (
     "#class"   : rule34us.Rule34usTagExtractor,
     "#pattern" : r"https://img\d*\.rule34\.us/images/../../[0-9a-f]{32}\.\w+",
     "#count"   : 10,
+
+    "search_tags": "[terios]_elysion",
+},
+
+{
+    "#url"     : "https://rule34.us/index.php?r=posts/index&q=",
+    "#comment" : "empty 'q' query parameter (#8546)",
+    "#category": ("booru", "rule34us", "tag"),
+    "#class"   : rule34us.Rule34usTagExtractor,
 },
 
 {