Merge pull request #25415 from thenx-wei/master

* gh-25415:
  Simplify PathResourceLookupFunction

Author: poutsma

spring-webmvc/src/main/java/org/springframework/web/servlet/function/PathResourceLookupFunction.java

@@ -110,10 +110,7 @@ private boolean isInvalidPath(String path) {
 				return true;
 			}
 		}
-		if (path.contains("..") && StringUtils.cleanPath(path).contains("../")) {
-				return true;
-			}
-		return false;
+		return path.contains("..") && StringUtils.cleanPath(path).contains("../");
 	}
 
 	private boolean isResourceUnderLocation(Resource resource) throws IOException {
@@ -144,10 +141,8 @@ else if (resource instanceof ClassPathResource) {
 		if (!resourcePath.startsWith(locationPath)) {
 			return false;
 		}
-		if (resourcePath.contains("%") && StringUtils.uriDecode(resourcePath, StandardCharsets.UTF_8).contains("../")) {
-			return false;
-		}
-		return true;
+		return !resourcePath.contains("%") ||
+				!StringUtils.uriDecode(resourcePath, StandardCharsets.UTF_8).contains("../");
 	}