re

metadata.py

@@ -395,32 +395,10 @@ def normalize_urls(value: Any) -> List[str]:
         if not u:
             return None
 
-        lower = u.lower()
-        if not (lower.startswith("http://") or lower.startswith("https://")):
-            return u
-
-        try:
-            parsed = urlsplit(u)
-        except Exception:
-            return u
-
-        scheme = (parsed.scheme or "").lower()
-        netloc = (parsed.netloc or "").lower()
-        path = unquote(parsed.path or "")
-        query = parsed.query or ""
-
-        # Normalize default ports.
-        if scheme == "http" and netloc.endswith(":80"):
-            netloc = netloc[:-3]
-        elif scheme == "https" and netloc.endswith(":443"):
-            netloc = netloc[:-4]
-
-        # Prefer no trailing slash except root.
-        if path and path != "/":
-            path = path.rstrip("/")
-
-        # Fragments are not part of the resource.
-        return urlunsplit((scheme, netloc, path, query, ""))
+        # IMPORTANT: URLs can be case-sensitive in the path/query on some hosts
+        # (e.g., https://0x0.st/PzGY.webp). Do not lowercase or otherwise rewrite
+        # the URL here; preserve exact casing and percent-encoding.
+        return u
 
     seen: Set[str] = set()
     out: List[str] = []