/*
 * Copyright 2002-2022 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.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.security.web.session;

import java.io.IOException;

import jakarta.servlet.FilterChain;
import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;

import org.springframework.core.log.LogMessage;
import org.springframework.web.filter.OncePerRequestFilter;

/**
 * Eagerly creates {@link HttpSession} if it does not already exist.
 *
 * @author Rob Winch
 * @since 5.7
 */
public class ForceEagerSessionCreationFilter extends OncePerRequestFilter {

	@Override
	protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
			throws ServletException, IOException {
		HttpSession session = request.getSession();
		if (this.logger.isDebugEnabled() && session.isNew()) {
			this.logger.debug(LogMessage.format("Created session eagerly"));
		}
		filterChain.doFilter(request, response);
	}

}
