package a.b.c;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.Writer;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.io.IOUtils;

public class GetFileServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String path = req.getParameter("path");

    path = getServletContext().getRealPath("/") + path;
        path = path.replaceAll("//", "/");

        resp.setContentType("text/plain");
        resp.setCharacterEncoding("UTF-8");
        resp.addHeader("Pragma", "no-cache");
        resp.addHeader("Cache-Control", "no-cache, max-age=0, must-revalidate");

        InputStream in = new FileInputStream(path);
        Writer out = resp.getWriter();
        try {
            IOUtils.copy(in, out, "UTF-8");
        } finally {
            in.close();
        }
    }

}