edu.umd.cs.submitServer.servlets.UploadProjectStarterFiles.java Source code

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Here is the source code for edu.umd.cs.submitServer.servlets.UploadProjectStarterFiles.java

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/**
 * Marmoset: a student project snapshot, submission, testing and code review
 * system developed by the Univ. of Maryland, College Park
 * 
 * Developed as part of Jaime Spacco's Ph.D. thesis work, continuing effort led
 * by William Pugh. See http://marmoset.cs.umd.edu/
 * 
 * Copyright 2005 - 2011, Univ. of Maryland
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 * 
 */

package edu.umd.cs.submitServer.servlets;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.SQLException;

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

import metadata.identification.FormatDescription;
import metadata.identification.FormatIdentification;

import org.apache.commons.fileupload.FileItem;

import edu.umd.cs.marmoset.modelClasses.IO;
import edu.umd.cs.marmoset.modelClasses.Project;
import edu.umd.cs.submitServer.MultipartRequest;

public class UploadProjectStarterFiles extends SubmitServerServlet {

    /**
     * The doPost method of the servlet. <br>
     * 
     * This method is called when a form has its tag value method equals to
     * post.
     * 
     * @param request
     *            the request send by the client to the server
     * @param response
     *            the response send by the server to the client
     * @throws ServletException
     *             if an error occurred
     * @throws IOException
     *             if an error occurred
     */
    @Override
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        MultipartRequest multipartRequest = (MultipartRequest) request.getAttribute(MULTIPART_REQUEST);
        Project project = (Project) request.getAttribute(PROJECT);

        Connection conn = null;
        FileItem fileItem = null;
        try {
            conn = getConnection();

            fileItem = multipartRequest.getFileItem();

            long sizeInBytes = fileItem.getSize();
            if (sizeInBytes == 0) {
                throw new ServletException("Trying upload file of size 0");
            }

            // copy the fileItem into a byte array
            InputStream is = fileItem.getInputStream();
            ByteArrayOutputStream bytes = new ByteArrayOutputStream((int) sizeInBytes);
            IO.copyStream(is, bytes);

            byte[] bytesForUpload = bytes.toByteArray();

            // set the byte array as the archive
            project.setArchiveForUpload(bytesForUpload);
            FormatDescription desc = FormatIdentification.identify(bytesForUpload);
            if (desc == null || !desc.getMimeType().equals("application/zip")) {
                response.sendError(HttpServletResponse.SC_BAD_REQUEST,
                        "You MUST submit starter files that are either zipped or jarred");
                return;
            }

            Integer archivePK = project.getArchivePK();
            if (archivePK == null || archivePK.equals(0)) {
                // If there is no archive, then upload and create a new one
                project.uploadCachedArchive(conn);
                project.update(conn);
            } else {
                // Otherwise, update the archive we already have
                project.updateCachedArchive(bytesForUpload, conn);
            }

            String redirectUrl = request.getContextPath() + "/view/instructor/projectUtilities.jsp?projectPK="
                    + project.getProjectPK();
            response.sendRedirect(redirectUrl);

        } catch (SQLException e) {
            throw new ServletException(e);
        } finally {
            releaseConnection(conn);
        }
    }
}