org.springframework.http.server.ServletServerHttpResponse Maven / Gradle / Ivy
/*
* Copyright 2002-2011 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.http.server;
import java.io.IOException;
import java.io.OutputStream;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletResponse;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.util.Assert;
/**
* {@link ServerHttpResponse} implementation that is based on a {@link HttpServletResponse}.
*
* @author Arjen Poutsma
* @since 3.0
*/
public class ServletServerHttpResponse implements ServerHttpResponse {
private final HttpServletResponse servletResponse;
private final HttpHeaders headers = new HttpHeaders();
private boolean headersWritten = false;
/**
* Construct a new instance of the ServletServerHttpResponse based on the given {@link HttpServletResponse}.
* @param servletResponse the servlet response
*/
public ServletServerHttpResponse(HttpServletResponse servletResponse) {
Assert.notNull(servletResponse, "'servletResponse' must not be null");
this.servletResponse = servletResponse;
}
/**
* Return the {@code HttpServletResponse} this object is based on.
*/
public HttpServletResponse getServletResponse() {
return this.servletResponse;
}
public void setStatusCode(HttpStatus status) {
this.servletResponse.setStatus(status.value());
}
public HttpHeaders getHeaders() {
return (this.headersWritten ? HttpHeaders.readOnlyHttpHeaders(this.headers) : this.headers);
}
public OutputStream getBody() throws IOException {
writeHeaders();
return this.servletResponse.getOutputStream();
}
public void close() {
writeHeaders();
}
private void writeHeaders() {
if (!this.headersWritten) {
for (Map.Entry> entry : this.headers.entrySet()) {
String headerName = entry.getKey();
for (String headerValue : entry.getValue()) {
this.servletResponse.addHeader(headerName, headerValue);
}
}
this.headersWritten = true;
}
}
}