Content-Length Header Filtered for HEAD Requests in Spring Boot 3.3.6 or 3.4.0

[TheryCN]

Hi,

When migrating from Spring Boot 3.3.5 to 3.3.6 (or 3.4.0), it seems that the Content-Length is filtered on every HEAD requests.

Here is a minimal example that demonstrates the issue:

@RestController
public class AnyController {

	@RequestMapping(method = RequestMethod.HEAD)
	public ResponseEntity<Void> getAnyHeader() {
		return ResponseEntity.ok().headers(httpHeaders -> httpHeaders.setContentLength(50L)).build();
	}

}

I found a related issue reported on Stack Overflow: Content-Length Header is Removed from HEAD Response.
Thanks for your help!

[wilkinsona]

Duplicates #43272.