/* * Copyright 2002-2018 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 * * http://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.web.filter; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpServletResponseWrapper; import org.springframework.http.HttpHeaders; import org.springframework.http.HttpStatus; import org.springframework.util.Assert; import org.springframework.web.util.WebUtils; /** * A response wrapper used for the implementation of * {@link RelativeRedirectFilter} also shared with {@link ForwardedHeaderFilter}. * * @author Rossen Stoyanchev * @since 4.3.10 */ final class RelativeRedirectResponseWrapper extends HttpServletResponseWrapper { private final HttpStatus redirectStatus; private RelativeRedirectResponseWrapper(HttpServletResponse response, HttpStatus redirectStatus) { super(response); Assert.notNull(redirectStatus, "'redirectStatus' is required"); this.redirectStatus = redirectStatus; } @Override public void sendRedirect(String location) { setStatus(this.redirectStatus.value()); setHeader(HttpHeaders.LOCATION, location); } public static HttpServletResponse wrapIfNecessary(HttpServletResponse response, HttpStatus redirectStatus) { RelativeRedirectResponseWrapper wrapper = WebUtils.getNativeResponse(response, RelativeRedirectResponseWrapper.class); return (wrapper != null ? response : new RelativeRedirectResponseWrapper(response, redirectStatus)); } }