package com.zy.asrs.wms.common.security;

import javax.servlet.ServletOutputStream;
import javax.servlet.WriteListener;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;
import java.io.ByteArrayOutputStream;
import java.io.PrintWriter;

public class CachedBodyHttpServletResponse extends HttpServletResponseWrapper {
    private final ByteArrayOutputStream cachedBody;
    private final PrintWriter writer;

    public CachedBodyHttpServletResponse(HttpServletResponse response) {
        super(response);
        this.cachedBody = new ByteArrayOutputStream();
        this.writer = new PrintWriter(cachedBody);
    }

    @Override
    public PrintWriter getWriter() {
        return writer;
    }

    @Override
    public ServletOutputStream getOutputStream() {
        return new ServletOutputStream() {
            @Override
            public void write(int b) {
                cachedBody.write(b);
            }

            @Override
            public boolean isReady() {
                return true;
            }

            @Override
            public void setWriteListener(WriteListener writeListener) {

            }
        };
    }

    public byte[] getContent() {
        writer.flush();
        return cachedBody.toByteArray();
    }
}