package isi.lab3;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

@WebServlet(urlPatterns = "/SendPdfAbout", name = "SendPdfAbout")
public class SendPdfAbout extends HttpServlet {

    protected void doGet(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws ServletException, IOException {

        ServletContext servletContext = httpServletRequest.getServletContext();
        String file = servletContext.getRealPath("Stabilnosc_kredytowa.pdf");
        String mimeType = servletContext.getMimeType(file);
        httpServletResponse.setContentType(mimeType != null ? mimeType : "application/octet-stream");
        FileInputStream fileInputStream = new FileInputStream(file);
        ServletOutputStream servletOutputStream = httpServletResponse.getOutputStream();
        readBuffer(fileInputStream,servletOutputStream);
    }

    private void readBuffer(FileInputStream fileInputStream, ServletOutputStream servletOutputStream) throws IOException {
        byte[] buffer = new byte[4096];
        int bytesRead;
        while ((bytesRead = fileInputStream.read(buffer)) != -1) {
            servletOutputStream.write(buffer, 0, bytesRead);
        }
        fileInputStream.close();
        servletOutputStream.close();
    }
}