handle empty segments

daniel-sanche · daniel-sanche · commit 105201b7a78c · 2026-07-16T15:55:55.000-07:00
diff --git a/packages/google-api-core/google/api_core/path_template.py b/packages/google-api-core/google/api_core/path_template.py
@@ -102,7 +102,7 @@ def _validate_multi_segment_value(val: str) -> bool:
         unseen_segments -= 1
         if segment == "..":
             leftover_segments -= 1
-        elif segment != ".":
+        elif segment not in (".", ""):
             leftover_segments += 1
 
         if leftover_segments < 0:
diff --git a/packages/google-api-core/tests/unit/test_path_template.py b/packages/google-api-core/tests/unit/test_path_template.py
@@ -760,6 +760,7 @@ def test_path_traversal_dots_validation_double_star_valid(name_val, expected_pat
         "projects/my-project/monitoredResourceDescriptors/..",
         "projects/my-project/monitoredResourceDescriptors/instance/../..",
         "projects/my-project/monitoredResourceDescriptors/a/b/../../../c/d/e/..",
+        "projects/my-project/monitoredResourceDescriptors/instance//..",
     ],
 )
 def test_path_traversal_dots_validation_double_star_invalid(name_val):

Original file line number	Diff line number	Diff line change
`@@ -760,6 +760,7 @@ def test_path_traversal_dots_validation_double_star_valid(name_val, expected_pat`
`760`	`760`	`"projects/my-project/monitoredResourceDescriptors/..",`
`761`	`761`	`"projects/my-project/monitoredResourceDescriptors/instance/../..",`
`762`	`762`	`"projects/my-project/monitoredResourceDescriptors/a/b/../../../c/d/e/..",`
	`763`	`+ "projects/my-project/monitoredResourceDescriptors/instance//..",`
`763`	`764`	`],`
`764`	`765`	`)`
`765`	`766`	`def test_path_traversal_dots_validation_double_star_invalid(name_val):`