UploadTextfile.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import static java.lang.Integer.parseInt;
import java.sql.SQLException;
import java.util.Iterator;
import java.util.List;
import static java.util.logging.Level.SEVERE;
import static java.util.logging.Logger.getLogger;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import static org.apache.commons.fileupload.servlet.ServletFileUpload.isMultipartContent;
import org.apache.commons.io.output.DeferredFileOutputStream;

/**
 *
 * @author jdeerin1
 */
public class UploadTextfile extends HttpServlet {
   DeferredFileOutputStream f;
    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException, SQLException, FileUploadException {
        response.setContentType("text/html;charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            int projectID = 0;
            textdisplay.Project thisProject = null;

            if (request.getParameter("projectID") == null) {
                out.print("projectID parameter is missing.");
                return;
            }

            String location = "";
            try {
                projectID = parseInt(request.getParameter("projectID"));
            } catch (NumberFormatException e) {
                out.print("Invalid projectID format.");
                return;
            }

            try {
                int p = request.getParameter("p") != null ? parseInt(request.getParameter("p")) : 0;
                location = (p > 0) ? "?projectID=" + projectID + "&p=" + p : "?projectID=" + projectID;
            } catch (NumberFormatException e) {
                location = "?projectID=" + projectID;
            }

            thisProject = new textdisplay.Project(projectID);

            if (!isMultipartContent(request)) {
                out.print("Request is not multipart.");
                return;
            }

            ServletFileUpload servletFileUpload = new ServletFileUpload(new DiskFileItemFactory());
            List fileItemsList = servletFileUpload.parseRequest(request);

            String optionalFileName = "";
            FileItem fileItem = null;
            Iterator it = fileItemsList.iterator();
            while (it.hasNext()) {
                FileItem fileItemTemp = (FileItem) it.next();
                String tmp = fileItemTemp.getFieldName();
                if (fileItemTemp.getFieldName().compareTo("file") == 0 && (fileItemTemp.getName().endsWith("txt") || fileItemTemp.getName().endsWith("xml"))) {
                    String textData;
                    try (BufferedReader in = new BufferedReader(new InputStreamReader(fileItemTemp.getInputStream(), "UTF-8"))) {
                        StringBuilder b = new StringBuilder("");
                        String line;
                        while ((line = in.readLine()) != null) {
                            b.append(line).append("\n");
                        }
                        textData = b.toString();
                    }
                    thisProject.setLinebreakText(textData);
                    response.sendRedirect("transcription.html" + location);
                    return;
                }
            }
            out.print("You must upload a .txt or .xml file, other formats are not supported at this time.");
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        try {
            processRequest(request, response);
        } catch (SQLException | FileUploadException ex) {
            getLogger(UploadTextfile.class.getName()).log(SEVERE, null, ex);
        }
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        try {
            processRequest(request, response);
        } catch (SQLException | FileUploadException ex) {
            getLogger(UploadTextfile.class.getName()).log(SEVERE, null, ex);
        }
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}