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/*
* Copyright 2023 Anton Tananaev (anton@traccar.org)
*
* 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.traccar.web;
import jakarta.servlet.ServletOutputStream;
import jakarta.servlet.WriteListener;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpServletResponseWrapper;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
public class ResponseWrapper extends HttpServletResponseWrapper {
private final ByteArrayOutputStream capture;
private ServletOutputStream output;
public ResponseWrapper(HttpServletResponse response) {
super(response);
capture = new ByteArrayOutputStream(response.getBufferSize());
}
@Override
public ServletOutputStream getOutputStream() {
if (output == null) {
output = new ServletOutputStream() {
@Override
public boolean isReady() {
return true;
}
@Override
public void setWriteListener(WriteListener writeListener) {
}
@Override
public void write(int b) {
capture.write(b);
}
@Override
public void flush() throws IOException {
capture.flush();
}
@Override
public void close() throws IOException {
capture.close();
}
};
}
return output;
}
@Override
public void flushBuffer() throws IOException {
super.flushBuffer();
if (output != null) {
output.flush();
}
}
public byte[] getCapture() throws IOException {
if (output != null) {
output.close();
return capture.toByteArray();
}
return null;
}
}
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