产品下载不包含带有bom的图片

lxw

2022-09-29 4deaba7a9924c132cea872440da7f2894c7e5d16

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package com.whyc.filter;
 
import org.springframework.util.StreamUtils;
 
import javax.servlet.ReadListener;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
 
public class BodyReaderHttpServletRequestWrapper extends HttpServletRequestWrapper {
 
    //保存流
    private byte[] requestBody = null;
 
    public BodyReaderHttpServletRequestWrapper(HttpServletRequest request) throws IOException {
        super(request);
        requestBody = StreamUtils.copyToByteArray(request.getInputStream());
    }
 
    @Override
    public ServletInputStream getInputStream() throws IOException {
 
        final ByteArrayInputStream bais = new ByteArrayInputStream(requestBody);
 
        return new ServletInputStream() {
 
            @Override
            public int read() throws IOException {
                return bais.read();
            }
 
            @Override
            public boolean isFinished() {
                return false;
            }
 
            @Override
            public boolean isReady() {
                return false;
            }
 
            @Override
            public void setReadListener(ReadListener readListener) {
 
            }
        };
    }
 
    @Override
    public BufferedReader getReader() throws IOException {
        return new BufferedReader(new InputStreamReader(getInputStream()));
    }
 
}