wang.ramboll.extend.request.limit.wrapper.RequestWrapper Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of ramboll-extend-request-limit-spring-mvc Show documentation

There is a newer version: 1.0.4-RC.1

Show newest version

package wang.ramboll.extend.request.limit.wrapper;

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.*;

/**
 * HttpServletRequest 包装器
 * @author WangRuibo
 */
public class RequestWrapper extends HttpServletRequestWrapper {

    private byte[] body ;//为解决Request多次读取body问题，冗余一份数据

    public RequestWrapper(HttpServletRequest request) throws IOException {
        super(request);
        InputStream is = request.getInputStream();
        body = StreamUtils.copyToByteArray(is);
    }

    @Override
    public BufferedReader getReader() throws IOException {
        return new BufferedReader(new InputStreamReader(new ByteArrayInputStream(body)));
    }

    @Override
    public ServletInputStream getInputStream() throws IOException {
        final ByteArrayInputStream bais = new ByteArrayInputStream(body);
        return new ServletInputStream() {
            @Override
            public boolean isFinished() {
                return false;
            }

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

            @Override
            public void setReadListener(ReadListener readListener) {

            }

            @Override
            public int read() throws IOException {
                return bais.read();
            }
        };
    }
}