replace servlet status code with HttpStatus in back-channel logout filters (spring-projects#17125)

Signed-off-by: Andrey Litvitski <[email protected]>

Author: therepanic

config/src/main/java/org/springframework/security/config/web/server/OidcBackChannelLogoutWebFilter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2023 the original author or authors.
+ * Copyright 2002-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,9 +18,9 @@
 
 import java.util.Collections;
 
-import jakarta.servlet.http.HttpServletResponse;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.springframework.http.HttpStatus;
 import reactor.core.publisher.Mono;
 
 import org.springframework.core.ResolvableType;
@@ -47,6 +47,7 @@
  * A filter for the Client-side OIDC Back-Channel Logout endpoint
  *
  * @author Josh Cummings
+ * @author Andrey Litvitski
  * @since 6.2
  * @see <a target="_blank" href=
  * "https://openid.net/specs/openid-connect-backchannel-1_0.html">OIDC Back-Channel Logout
@@ -108,7 +109,7 @@ public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
 
 	private Mono<Void> handleAuthenticationFailure(ServerWebExchange exchange, Exception ex) {
 		this.logger.debug("Failed to process OIDC Back-Channel Logout", ex);
-		exchange.getResponse().setRawStatusCode(HttpServletResponse.SC_BAD_REQUEST);
+		exchange.getResponse().setRawStatusCode(HttpStatus.BAD_REQUEST.value());
 		return this.errorHttpMessageConverter.write(Mono.just(oauth2Error(ex)), ResolvableType.forClass(Object.class),
 				ResolvableType.forClass(Object.class), MediaType.APPLICATION_JSON, exchange.getRequest(),
 				exchange.getResponse(), Collections.emptyMap());

config/src/main/java/org/springframework/security/config/web/server/OidcBackChannelServerLogoutHandler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2024 the original author or authors.
+ * Copyright 2002-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,9 +22,9 @@
 import java.util.Map;
 import java.util.concurrent.atomic.AtomicInteger;
 
-import jakarta.servlet.http.HttpServletResponse;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.springframework.http.HttpStatus;
 import reactor.core.publisher.Mono;
 
 import org.springframework.core.ResolvableType;
@@ -54,6 +54,7 @@
  * Back-Channel Logout Token and invalidates each one.
  *
  * @author Josh Cummings
+ * @author Andrey Litvitski
  * @since 6.4
  * @see <a target="_blank" href=
  * "https://openid.net/specs/openid-connect-backchannel-1_0.html">OIDC Back-Channel Logout
@@ -170,7 +171,7 @@ private OAuth2Error oauth2Error(Collection<?> errors) {
 	}
 
 	private Mono<Void> handleLogoutFailure(ServerWebExchange exchange, OAuth2Error error) {
-		exchange.getResponse().setRawStatusCode(HttpServletResponse.SC_BAD_REQUEST);
+		exchange.getResponse().setRawStatusCode(HttpStatus.BAD_REQUEST.value());
 		return this.errorHttpMessageConverter.write(Mono.just(error), ResolvableType.forClass(Object.class),
 				ResolvableType.forClass(Object.class), MediaType.APPLICATION_JSON, exchange.getRequest(),
 				exchange.getResponse(), Collections.emptyMap());