Announcement

**robferguson** · 2 Apr 2011, 15:58

Hi,

You might like to take a look at Apache fileUpload.

Code:

@Singleton
@SuppressWarnings("serial")
public class FileUploadServlet extends HttpServlet {

  @Override
  public void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    this.process(request, response);
  }

  @Override
  public void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    this.process(request, response);
  }

  private void process(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {

    // check that we have a file upload request
    if (ServletFileUpload.isMultipartContent(request)) {
      processFiles(request, response);
    } else {
      processQuery(request, response);
    }
  }

  private File tmpDir;
  private static final String DESTINATION_DIR_PATH ="/files/upload";
  private File destinationDir;

  public void init(ServletConfig config) throws ServletException {
      super.init(config);

    DOMConfigurator.configure("log4j.xml");

    Log.debug("FileUpload Servlet");

    tmpDir = new File(((File) getServletContext().getAttribute("javax.servlet.context.tempdir")).toString());

    if (! tmpDir.isDirectory()) {
      throw new ServletException(tmpDir.toString() + " is not a directory");
    }

    Log.debug("tmpDir: " + tmpDir.toString());

    String realPath = getServletContext().getRealPath(DESTINATION_DIR_PATH);
    destinationDir = new File(realPath);

    if (! destinationDir.isDirectory()) {
      throw new ServletException(DESTINATION_DIR_PATH + " is not a directory");
    }

    Log.debug("destinationDir: " + destinationDir.toString());
  }

  @SuppressWarnings("unchecked")
  private void processFiles(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {

    // create a factory for disk-based file items
    DiskFileItemFactory factory = new DiskFileItemFactory();

    // set the size threshold, above which content will be stored on disk
    factory.setSizeThreshold(1 * 1024 * 1024); // 1 MB

    // set the temporary directory (this is where files that exceed the threshold will be stored)
    factory.setRepository(tmpDir);

    // create a new file upload handler
    ServletFileUpload upload = new ServletFileUpload(factory);

    try {
      String recordType = "Account";

      // parse the request
      List items = upload.parseRequest(request);

      // process the uploaded items
      Iterator itr = items.iterator();

      while (itr.hasNext()) {
        FileItem item = (FileItem) itr.next();

        // process a regular form field
        if (item.isFormField()) {
          Log.debug("Field Name: " + item.getFieldName() + ", Value: " + item.getString());

          if (item.getFieldName().equals("recordType")) {
            recordType = item.getString();
          }
        } else {
          // process a file upload
          Log.debug("Field Name: " + item.getFieldName() + ", Value: " + item.getName() +
            ", Content Type: "+ item.getContentType() + ", In Memory: " + item.isInMemory() +
            ", File Size: " + item.getSize());

          // write the uploaded file to the application's file staging area
          File file = new File(destinationDir, item.getName());
          item.write(file);

          importCsvFile(recordType, file.getPath());
        }
      }
    }
    catch (FileUploadException e) {
      Log.error("Error encountered while parsing the request", e);
    }
    catch (Exception e) {
      Log.error("Error encountered while uploading file", e);
    }
  }

And take a look at this post -> http://forums.smartclient.com/showthread.php?t=5477 and this post -> http://forums.smartclient.com/showthread.php?t=5477&page=2

Code:

  ...

  private static final String DEFAULT_FILE_UPLOAD_SERVICE_PATH = "upload";
  private static final String RECORD_TYPE = "recordType";
  private static final String MAP_NAME = "mapName";
  private static final String TARGET="uploadTarget";

  private VLayout initBody() {

    // initialise the Footer layout container
    VLayout body = new VLayout();
    body.setStyleName("crm-Wizard-Body");
    body.setWidth100();
    body.setHeight100();

    // initialise the form
    uploadForm = new DynamicForm();
    uploadForm.setWidth100();
    uploadForm.setMargin(8);
    uploadForm.setNumCols(2);
    uploadForm.setCellPadding(2);
    uploadForm.setWrapItemTitles(false);
    // no ":" after the field name
    uploadForm.setTitleSuffix(" ");
    uploadForm.setRequiredTitleSuffix(" ");

    // initialise the hidden frame
    NamedFrame frame = new NamedFrame(TARGET);
    frame.setWidth("1px");
    frame.setHeight("1px");
    frame.setVisible(false);

    uploadForm.setEncoding(Encoding.MULTIPART);
    uploadForm.setMethod(FormMethod.POST);
    // set the (hidden) form target
    uploadForm.setTarget(TARGET);

    StringBuilder url = new StringBuilder();
    url.append(DEFAULT_FILE_UPLOAD_SERVICE_PATH);
    uploadForm.setAction(FileUploadEntryPoint.getRelativeURL(url.toString()));

    // initialise the Record type field
    recordType = new ComboBoxItem(RECORD_TYPE, "Record type");
    recordType.setName(RECORD_TYPE);
    recordType.setType("comboBox");
    recordType.setValueMap("Account", "Contact");
    recordType.setDefaultToFirstOption(true);
    recordType.setSelectOnFocus(true);

    // initialise the Map field
    mapName = new ComboBoxItem(MAP_NAME, "Data map");
    mapName.setName(MAP_NAME);
    mapName.setType("comboBox");
    mapName.setValueMap("Automatic", "Create new map");
    mapName.setDefaultToFirstOption(true);

    // initialise the File name field
    uploadItem = new UploadItem("filename");
    uploadItem.setName("filename");
    uploadItem.setTitle("File name");
    uploadItem.setWidth(280);

    // set the fields into the form
    uploadForm.setFields(recordType, mapName, uploadItem);

    body.addMember(uploadForm);
    body.addMember(frame);

    return body;
  }

Cheers
Rob

Attached Files

Announcement

GWTUpload issue with Dynamic form

Comment