Right after I posted this message I came accross another sample code that
allowed me pass the error and let me upload the my image.
Here is the code that let me do that.
ServletFileUpload upload = *new* ServletFileUpload();
response.setContentType("text/plain");
FileItemIterator iterator = upload.getItemIterator(request);
*while* (iterator.hasNext())
{
FileItemStream item = iterator.next();
InputStream stream = item.openStream();
*if* (*false* == item.isFormField())
{
*int* len;
*byte*[] buffer = *new* *byte*[8192];
*while* ((len = stream.read(buffer, 0, buffer.length)) != -1)
{
//your code build buffer
}
//your code here to persist to database... use Blob
}
}
I suspect that the error I was getting was due to the use of
'DiskFileItemFactory'
On Wed, Oct 21, 2009 at 10:19 PM, hou0175 <kajita...@gmail.com> wrote:
> Hi,
>
> I'm new to GWT and am having problems writing a page to allow users to
> upload an image to the server (onto DB using JDO).
>
> I'm getting the following exception:
>
> java.security.AccessControlException: access denied
> (java.io.FilePermission C:\Users\hou0175\AppData\Local\Temp
> \upload__4283d0d0_1247a39ab1c__8000_00000002.tmp write)
>
>
> -----------------------------------------------------------------------------------------------
> The following is the code on my client side that I grabbed from the
> web:
>
> // Create a TextBox, giving it a
> name so that it will be submitted.
> final TextBox tb = new TextBox();
> tb.setName("textBoxFormElement");
> panel.add(tb);
>
> // Create a ListBox, giving it a name and some values to
> be
> associated with
> // its options.
> ListBox lb = new ListBox();
> lb.setName("listBoxFormElement");
> lb.addItem("foo", "fooValue");
> lb.addItem("bar", "barValue");
> lb.addItem("baz", "bazValue");
> panel.add(lb);
>
> // Create a FileUpload widget.
> FileUpload upload = new FileUpload();
> upload.setName("uploadFormElement");
> panel.add(upload);
>
> // Add a 'submit' button.
> panel.add(new Button("Submit", new ClickListener() {
> public void onClick(Widget sender) {
> form.submit();
> }
> }));
>
> // Add an event handler to the form.
> form.addFormHandler(new FormHandler() {
> public void onSubmit(FormSubmitEvent event) {
> // This event is fired just before the form is
> submitted. We
> can take
> // this opportunity to perform validation.
> if (tb.getText().length() == 0) {
> Window.alert("The text box must not be empty");
> event.setCancelled(true);
> }
> }
>
> public void onSubmitComplete(FormSubmitCompleteEvent
> event) {
> // When the form submission is successfully
> completed, this
> event is
> // fired. Assuming the service returned a response
> of type
> text/html,
> // we can get the result text here (see the
> FormPanel
> documentation for
> // further explanation).
> Window.alert(event.getResults());
> }
> });
>
> //}
>
>
>
> m_MainDisplayPanel.add(form);
> RootPanel.get("blogPanel").add(decoratorPanel);
>
>
> ---------------------------------------------------------
> The following is the code on my server side (also from some samples
> online):
>
> boolean isMultipart = ServletFileUpload.isMultipartContent(request);
> List items = null;
> String text ="not loaded!";
>
> if ( isMultipart ) {
> // Create a factory for disk-based file items
> FileItemFactory factory = new DiskFileItemFactory();
>
> // Create a new file upload handler
> ServletFileUpload upload = new ServletFileUpload(factory);
>
> // Parse the request
> try {
> items = upload.parseRequest(request);
> <===========================I get the exception here
> } catch (Exception e) {
> text = e.getStackTrace().toString();
> }
> }
>
>
>
>
> I'm getting the exception on "items = upload.parseRequest(request); "
>
>
> I'm running GWT in Hosted Mode.
>
> I'm not sure if i can do this in Hosted Mode. If not, how can I test
> my code before I deploy it?
>
> I must be doing something trivial wrong. I'd appreciate if someone
> could point me to the right direction.
>
> I thank you in advance for your help.
>
>
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