change banners to absolute url

1 files changed, 5 insertions, 2 deletions

diff --git a/app.py b/app.py
index 2b10dcd..2cf12f4 100644
--- a/app.py
+++ b/app.py
@@ -39,8 +39,11 @@ ALLOWED_STATIC_EXTENSIONS = {
 }
 
 
-def safe_url(filename):
-    return quote(str(filename or ""), safe="/")
+def safe_url(url):
+    raw = str(url or "").strip()
+    if not raw:
+        return ""
+    return quote(raw, safe=":/?&=#%+~@!$,;*-._")