How can I create a single REST API for variable number of path variables such as GET "/ads/{category1}/.../{categoryN}" in Spring?
where number of categories is not fixed
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It's not provided out-of-the-box by Spring, but there is some workaround.
You can map any path like "/ads/**" to your handler method, and then parse categories by splitting the rest of the path by slash:
String path = (String) request.getAttribute(HandlerMapping.PATH_WITHIN_HANDLER_MAPPING_ATTRIBUTE);
String tailPath = path.substring(5); //skip "/ads/"
String[] categories = tailPath.split("/");
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