"Reply to author".
> Jim, the class is also ClientFileSystemBridge Apache FileUpload?
No, I didn't strip out all of my application-related code before I
posted it. Also, "id" and "saveAs" are just form names that I happen
to be using on the client side; your names will be different.
On Mar 5, 4:09 am, Leonardo Terrão <leonardoter...@gmail.com> wrote:
> Thanks guys!
>
> Jim, the class is also ClientFileSystemBridge Apache FileUpload?
>
> Thank you!
>
> On 2 mar, 17:49, Alfredo Quiroga-Villamil <laww...@gmail.com> wrote:
>
>
>
>
>
>
>
> > If your backend is Spring they also have great support for this. A few
> > lines only and you are up and running.
>
> >http://www.ioncannon.net/programming/975/spring-3-file-upload-example/
>
> > Best regards,
>
> > Alfredo
>
> > On Fri, Mar 2, 2012 at 3:45 PM, Thad <thad.humphr...@gmail.com> wrote:
> > > I agree with Jim on using Apache FileUpload.
>
> > > One trick I occasionally use to simplify my upload processing for text
> > > fields is to create a hidden field within the form. Before calling
> > > form.submit(), I do whatever validation and format conversions I want and
> > > assemble the non-file input into a JSON string that I assign to my hidden
> > > field. With this method I can submit values from fields outside of the
> > > FormPanel and greater control over the fields inside the panel.
>
> > > On Friday, March 2, 2012 2:33:29 PM UTC-5, Jim Douglas wrote:
>
> > >> Hi Leonardo,
>
> > >> I use Apache FileUpload to manage the process:
>
> > >>http://commons.apache.org/**fileupload/<http://commons.apache.org/fileupload/>
>
> > >> Here's the doPost() method from my FileUploadServelet:
>
> > >> @Override
> > >> public void doPost(HttpServletRequest p_request,
> > >> HttpServletResponse p_response)
> > >> throws ServletException, IOException
> > >> {
> > >> ServletFileUpload upload = new ServletFileUpload();
>
> > >> /*
> > >> * This tracks the state of the upload progress. The client
> > >> will
> > >> * occasionally request a progress update; the doGet() method
> > >> * returns this information to the client in an XML structure.
> > >> */
> > >> FileUploadProgress progress = new FileUploadProgress();
> > >> HttpSession session = p_request.getSession();
> > >> session.setAttribute("**progress", progress);
> > >> upload.setProgressListener(**progress);
>
> > >> try
> > >> {
> > >> FileItemIterator iter = upload.getItemIterator(p_**request);
> > >> StringBuilder response = new StringBuilder();
> > >> Integer id = null;
> > >> while (iter.hasNext())
> > >> {
> > >> FileItemStream item = iter.next();
> > >> String name = item.getFieldName();
> > >> InputStream stream = item.openStream();
> > >> if (item.isFormField())
> > >> {
> > >> String value = Streams.asString(stream);
> > >> if ("id".equals(name))
> > >> {
> > >> id = Integer.valueOf(value);
> > >> }
> > >> if ("saveAs".equals(name))
> > >> {
> > >> if (id == null)
> > >> {
>
> > >> p_response.sendError(SC_**INTERNAL_SERVER_ERROR,
> > >> "No filesystem id for " + name + " " +
> > >> value);
> > >> return;
> > >> }
> > >> File f =
> > >> ClientFileSystemBridge.**createTempFile(value);
> > >> ClientFileSystemBridge.put(id, value, f);
> > >> }
> > >> response.append(name).append(' ')
> > >> .append(value).append('\n');
> > >> }
> > >> else
> > >> {
> > >> String filename = item.getName();
> > >> if (id == null)
> > >> {
> > >> p_response.sendError(SC_**INTERNAL_SERVER_ERROR,
> > >> "No filesystem id for file " + filename);
> > >> return;
> > >> }
> > >> File f =
> > >> ClientFileSystemBridge.**createTempFile(filename);
> > >> OutputStream out = new FileOutputStream(f);
> > >> try
> > >> {
> > >> // This WILL fail with
> > >> org.mortbay.jetty.EofException
> > >> // if the client form disappears before we've
> > >> read the
> > >> // entire stream.
> > >> int bytes;
> > >> byte buf[] = new byte[32768];
> > >> while ((bytes = stream.read(buf)) > 0)
> > >> out.write(buf, 0, bytes);
> > >> }
> > >> catch (Throwable t)
> > >> {
> > >> p_response.sendError(SC_**INTERNAL_SERVER_ERROR,
> > >> t.getClass().getName() + " " +
> > >> t.getMessage());
> > >> t.printStackTrace();
> > >> }
> > >> finally
> > >> {
> > >> out.close();
> > >> stream.close();
> > >> }
> > >> ClientFileSystemBridge.put(id, filename, f);
> > >> response.append(name).append(' ').
> > >> append(f.length()).append(' ').
> > >> append(filename).append('\n')**;
> > >> }
> > >> }
> > >> String message = response.toString();
> > >> p_response.reset();
> > >> p_response.setContentType("**text/plain");
> > >> p_response.setContentLength(**message.length());
> > >> Writer writer = p_response.getWriter();
> > >> writer.append(message);
> > >> writer.flush();
> > >> }
> > >> // catch (FileUploadException e)
> > >> // {
> > >> // p_response.sendError(SC_**INTERNAL_SERVER_ERROR,
> > >> e.getMessage());
> > >> // e.printStackTrace();
> > >> // }
> > >> catch (Throwable e)
> > >> {
> > >> p_response.sendError(SC_**INTERNAL_SERVER_ERROR,
> > >> e.getMessage());
> > >> e.printStackTrace();
> > >> }
> > >> }
>
> > >> And a helper function for reporting progress:
>
> > >> import org.apache.commons.fileupload.**ProgressListener;
>
> > >> public class FileUploadProgress implements ProgressListener
> > >> {
> > >> private volatile long m_bytesRead;
> > >> private volatile long m_contentLength;
> > >> private volatile int m_item;
>
> > >> public FileUploadProgress()
> > >> {
> > >> super();
> > >> }
>
> > >> public void update(long p_bytesRead, long p_contentLength, int
> > >> p_item)
> > >> {
> > >> m_bytesRead = p_bytesRead;
> > >> m_contentLength = p_contentLength;
> > >> m_item = p_item;
> > >> }
>
> > >> public long getBytesRead()
> > >> {
> > >> return m_bytesRead;
> > >> }
>
> > >> public long getContentLength()
> > >> {
> > >> return m_contentLength;
> > >> }
>
> > >> public int getItem()
> > >> {
> > >> return m_item;
> > >> }
> > >> }
>
> > >> On Mar 2, 5:26 am, Leonardo Terrão <leonardoter...@gmail.com> wrote:
> > >> > Hello everybody!
>
> > >> > Following are some examples found right here in the discussion group
> > >> > took two classes below.
>
> > >> > In my class I have ArquivoUpload umTextBox a form with a ListBox and a
> > >> > FileUpload. In class FileUploadServlet're getting only the data from
> > >> > the FileUpload. Could someone help me also take the data from the
> > >> > TextBox?
> > >> > In debug mode I see everything that is in the form of the request but
> > >> > I can not extract the values.
>
> > >> > public class ArquivoUpload implements EntryPoint {
>
> > >> > public static final String UPLOAD_ACTION_URL =
> > >> GWT.getModuleBaseURL()
> > >> > + "upload";
>
> > >> > @Override
> > >> > public void onModuleLoad() {
>
> > >> > // Cria um FormPanel e apontá-lo para um serviço.
> > >> > final FormPanel form = new FormPanel();
> > >> > form.setAction(UPLOAD_ACTION_**URL);
>
> > >> > // Porque nós vamos adicionar um widget FileUpload,
> > >> vamos precisar
> > >> > para
> > >> > // definir o
> > >> > // Form usar o método POST, e codificação MIME
> > >> multipart.
> > >> > form.setEncoding(FormPanel.**ENCODING_MULTIPART);
> > >> > form.setMethod(FormPanel.**METHOD_POST);
>
> > >> > // Cria um painel para conter todos os elementos do
> > >> formulário.
> > >> > VerticalPanel panel = new VerticalPanel();
> > >> > form.setWidget(panel);
>
> > >> > // Criar um TextBox, dando-lhe um nome para que ele
> > >> será submetido.
> > >> > final TextBox tb = new TextBox();
> > >> > tb.setName("**TextBoxFormElement");
> > >> > panel.add(tb);
>
> > >> > // Criar um ListBox,...
>
> read more »
--
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
To post to this group, send email to google-web-toolkit@googlegroups.com.
To unsubscribe from this group, send email to google-web-toolkit+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
No comments:
Post a Comment