RFC 1867-compatibe File Upload

CI-CUBE

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Jan 25, 2010, 11:26:05 AM1/25/10

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Hi @ all,

I'm looking for an RFC 1867-compatible, pure (non-UI) file upload
functionality to be used at [Smart]GWT's client side. It would be
perfect if the code could provide a callback to render a progress bar.

Is there something like that, maybe a JSNI wrapper to a JS library,
available?

Thx in advance,

Ekki

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Lothar Kimmeringer

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Jan 25, 2010, 11:43:07 AM1/25/10

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CI-CUBE schrieb:

> I'm looking for an RFC 1867-compatible, pure (non-UI) file upload
> functionality to be used at [Smart]GWT's client side.

FormPanel.setEncoding(FormPanel.ENCODING_MULTIPART)
should provide that kind of functionality.

> It would be
> perfect if the code could provide a callback to render a progress bar.

I'm not aware of such a thing but defining a function in a
RemoteServiceServlet returning the currently received bytes
of the parallel running upload, shouldn't be that hard to
be implemented by yourself.

Regards, Lothar

Martin Trummer

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Jan 26, 2010, 8:19:52 AM1/26/10

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I'm not sure, what you mean with non-UI and on the other hand
you want to display a progressbar.
maybe you want a pure-GWT implementation without any 3rd party stuff
like flash or applets?

if so, this may be what you are looking 4:
http://code.google.com/p/gwtupload/

Alex opn

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Dec 4, 2012, 10:46:36 AM12/4/12

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Looks good! How about making GWT Uploader available via maven? : )

Am Dienstag, 4. Dezember 2012 04:09:34 UTC+1 schrieb Shawn Quinn:

The GWT Uploader project also provides callbacks for file upload progress events, all on the client side:

http://www.moxiegroup.com/moxieapps/gwt-uploader/

Thanks,

-Shawn

Thad

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Dec 5, 2012, 4:19:18 PM12/5/12

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On Monday, December 3, 2012 10:09:34 PM UTC-5, Shawn Quinn wrote:

The GWT Uploader project also provides callbacks for file upload progress events, all on the client side:

http://www.moxiegroup.com/moxieapps/gwt-uploader/

Thanks,

-Shawn

Shawn,

The demos look very impressive so I thought I'd give it a try. I've several places in my current project where I upload files, but my progress bar solution does not work so well with IE (as in 15%, loooong wait, Done!).

I'm quickly hitting an exception with Uploader. Maybe you have some insight.

I use UiBinder throughout. Since Uploader doesn't have UiBinder tags, I thought I could put in a SimplePanel then assign Uploader to it. In my FooViewImpl.ui.xml I add:

<g:HTMLPanel'>

<div>

<g:Label ui:field='progress'></g:Label>

<g:SimplePanel ui:field='uploadRaw'></g:SimplePanel>

</div>

...

In FooViewImpl.java I add

@UiField

Label progress;

@UiField

SimplePanel uploadRaw;

public FooViewImpl() {

initWidget(uiBinder.createAndBindUi(this));

// uploader

JSONObject params = new JSONObject();

params.put("fileType", new JSONString("raw text"));

Uploader uploader = new Uploader()

.setUploadURL(GWT.getModuleBaseURL()+"/uploadInput")

.setButtonText("Upload")

.setPostParams(params);

uploader.setUploadProgressHandler(new UploadProgressHandler() {

@Override

public boolean onUploadProgress(UploadProgressEvent evt) {

progress.setText(NumberFormat.getPercentFormat().format(

evt.getBytesComplete() / evt.getBytesTotal()));

return true;

}

});

uploadRaw.setWidget(uploader);

This is pretty much the quick start at http://www.moxiegroup.com/moxieapps/gwt-uploader/quickstart.jsp but allowing for UiBinder.

When I click the "Upload" in the UI, I get the error below. I don't see Uploader in the stack trace to I dunno where to start.

Thanks.

Uncaught exception: com.google.gwt.event.shared.UmbrellaException: Exception caught: null

at com.google.gwt.event.shared.HandlerManager.fireEvent(HandlerManager.java:129)

at com.google.gwt.user.client.ui.Widget.fireEvent(Widget.java:129)

at com.google.gwt.event.dom.client.DomEvent.fireNativeEvent(DomEvent.java:116)

at com.google.gwt.user.client.ui.Widget.onBrowserEvent(Widget.java:177)

at com.google.gwt.user.client.DOM.dispatchEventImpl(DOM.java:1351)

at com.google.gwt.user.client.DOM.dispatchEvent(DOM.java:1307)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:597)

at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)

at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)

at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)

at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:338)

at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219)

at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)

at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571)

at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279)

at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)

at com.google.gwt.core.client.impl.Impl.apply(Impl.java)

at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:242)

at sun.reflect.GeneratedMethodAccessor73.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:597)

at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)

at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)

at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)

at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:293)

at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:547)

at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364)

at java.lang.Thread.run(Thread.java:662)