Convert PCM to Mu-law conversion

import javax.servlet.*;

import javax.servlet.http.*;

import java.io.*;

import java.util.*;


public class MyServlet extends HttpServlet {


    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        // You can still access request parameters here

        String action = request.getParameter("action");


        // Output parameter value

        System.out.println("Action parameter value: " + action);


        // Continue processing the request

        // ...

    }

}


class MyFilter implements Filter {


    @Override

    public void init(FilterConfig filterConfig) throws ServletException {

        // Initialization code, if needed

    }


    @Override

    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {

        // Wrap the original request with BufferedRequestWrapper

        BufferedRequestWrapper bufferedRequest = new BufferedRequestWrapper((HttpServletRequest) request);


        // You can still access request parameters inside the filter

        String action = bufferedRequest.getParameter("action");


        // Output parameter value

        System.out.println("Action parameter value inside filter: " + action);


        // Pass the wrapped request down the filter chain

        chain.doFilter(bufferedRequest, response);

    }


    @Override

    public void destroy() {

        // Cleanup code, if needed

    }

}


class BufferedRequestWrapper extends HttpServletRequestWrapper {

    private final String body;

    private final Map<String, String[]> parameters;


    public BufferedRequestWrapper(HttpServletRequest request) throws IOException {

        super(request);

        StringBuilder stringBuilder = new StringBuilder();

        BufferedReader bufferedReader = null;

        parameters = new HashMap<>(request.getParameterMap());


        try {

            InputStream inputStream = request.getInputStream();

            if (inputStream != null) {

                bufferedReader = new BufferedReader(new InputStreamReader(inputStream));

                char[] charBuffer = new char[1024];

                int bytesRead;

                while ((bytesRead = bufferedReader.read(charBuffer)) > 0) {

                    stringBuilder.append(charBuffer, 0, bytesRead);

                }

            } else {

                stringBuilder.append("");

            }

        } finally {

            if (bufferedReader != null) {

                bufferedReader.close();

            }

        }

        body = stringBuilder.toString();

    }


    @Override

    public ServletInputStream getInputStream() throws IOException {

        final ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(body.getBytes());

        return new ServletInputStream() {

            public int read() throws IOException {

                return byteArrayInputStream.read();

            }


            @Override

            public boolean isFinished() {

                return byteArrayInputStream.available() == 0;

            }


            @Override

            public boolean isReady() {

                return true;

            }


            @Override

            public void setReadListener(ReadListener listener) {

                // Not implemented

            }

        };

    }


    @Override

    public BufferedReader getReader() throws IOException {

        return new BufferedReader(new InputStreamReader(this.getInputStream()));

    }


    @Override

    public String getParameter(String name) {

        String[] values = parameters.get(name);

        return (values != null && values.length > 0) ? values[0] : null;

    }


    @Override

    public Map<String, String[]> getParameterMap() {

        return parameters;

    }


    @Override

    public Enumeration<String> getParameterNames() {

        return Collections.enumeration(parameters.keySet());

    }


    @Override

    public String[] getParameterValues(String name) {

        return parameters.get(name);

    }

}


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