spring RelativeRedirectResponseWrapper 源码
spring RelativeRedirectResponseWrapper 代码
文件路径：/spring-web/src/main/java/org/springframework/web/filter/RelativeRedirectResponseWrapper.java
/*
* 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
*
* 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.web.filter;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpServletResponseWrapper;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatusCode;
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 HttpStatusCode redirectStatus;
private RelativeRedirectResponseWrapper(HttpServletResponse response, HttpStatusCode 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,
HttpStatusCode redirectStatus) {
RelativeRedirectResponseWrapper wrapper =
WebUtils.getNativeResponse(response, RelativeRedirectResponseWrapper.class);
return (wrapper != null ? response :
new RelativeRedirectResponseWrapper(response, redirectStatus));
}
}
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