feat: support reverse-proxy URL subpaths (llama-swap, SwarmUI) (#1122)

tests/utils/test_url_utils.py

@@ -0,0 +1,23 @@
+"""Tests for py/utils/url_utils.py relative_root_prefix."""
+
+from __future__ import annotations
+
+import pytest
+
+from py.utils.url_utils import relative_root_prefix
+
+
+@pytest.mark.parametrize(
+    ("request_path", "expected"),
+    [
+        ("/", ""),
+        ("/loras", ""),
+        ("/checkpoints", ""),
+        ("/statistics", ""),
+        ("/loras/", ""),
+        ("/loras/recipes", "../"),
+        ("/loras/recipes/", "../"),
+    ],
+)
+def test_relative_root_prefix(request_path: str, expected: str) -> None:
+    assert relative_root_prefix(request_path) == expected