:title
route_path_is_safe

:sig
bool route_path_is_safe(String path)

:see
route_path_sanitize
route_path_normalize
request_query_path
request_query_route

:content
Returns whether a normalized route path is safe to use as a route-derived file path segment.

A safe route path contains only non-empty segments made from ASCII letters, digits, `_`, and `-`. The segments `.` and `..` are rejected.

```cpp
route_path_is_safe("workspace/projects"); // true
route_path_is_safe("workspace/../admin"); // false
route_path_is_safe("view.uce");           // false
```

Most request code should use runtime-populated `context.params["ROUTE_PATH"]` or `request_query_route()` instead of calling this directly.