Comments on Stephan's Hacks & Musings: Grails Ajax File Upload ProgressBar

Hi Stephan, Can you please update th...

2009-10-06T18:11:05.989+08:00

Hi Stephan,

Can you please update the Code Attachment. I am unable to open it with the gzip. Can you please add another attachment ? I have to implement this thing very urgently. Please help.

regards
Gaurav

Hi, I'm having an issue with this example. I'm usi...

2009-09-09T19:06:43.884+08:00

Hi,
I'm having an issue with this example.
I'm using Grails 1.1.1. I downloaded the latest fileupload lib from apache and dropped it in my app's /lib folder.
Then I copied your two groovy classes into my /src/my/package and renamed your package to my.package
I dropped your resource.xml file into my groovy/conf/spring directory.

Now when I upload a file,

This is a great article and works great. Except on...

2009-07-08T05:37:31.611+08:00

This is a great article and works great. Except on my first try. When I do the first upload, I get the missing property for "AjaxProgressListener" in my controller. I'm using a 500mb file so I know its large enough. I'm also waiting 2 seconds before I even query the progress the first time. If I try to upload again then it works fine. It's just the first upload after the app

@Stefan: thanks for this article and for the fixed...

2009-06-12T21:53:54.058+08:00

@Stefan: thanks for this article and for the fixed link.

@cenkcivici: You are right, I experienced this myself. Setting the request and calling newFileUpload is not thread safe. I ran into conditions where the upload information was mixed up.

I solved this by instantiating a new pListener on each newFileUpload call.

Hi Lars I've fixed the links. You should be able ...

2009-06-10T18:18:20.885+08:00

Hi Lars

I've fixed the links. You should be able to download the example project now.

Regards
Stephan

Is the source available at som other location? The...

2009-06-10T16:43:01.341+08:00

Is the source available at som other location? The link below does not work...

I found the error...I forgot to delete the old com...

2009-03-27T22:41:00.000+08:00

I found the error...

I forgot to delete the old commons-fileupload.jar from the grails lib folder...

oh that hurts ;)

michaela

I really like this article ;-)I used the uploadBar...

2009-03-26T22:34:00.000+08:00

I really like this article ;-)

I used the uploadBar in my grails-app, but since I upgraded to grails1.1 it's broken :(

I think it because of lazy fetching / session handling,trouble starts at line 53:
fu.setProgressListener(this.pListener)

I'm still searching for a workaround...

Michaela

The listener is a singleton right? If so setting s...

2009-02-06T04:14:00.000+08:00

The listener is a singleton right? If so setting session on it has the potential risk of overwriting other concurrent upload information..

Nice! Unfortunately does not work 1.1 out of the b...

2009-01-19T21:31:00.000+08:00

Nice! Unfortunately does not work 1.1 out of the box. Would also be good to leave the default HSQL db in by default.

@matthias: CommonsMultipartResolver is initialized...

2008-12-04T20:33:00.000+08:00

@matthias: CommonsMultipartResolver is initialized by the Spring Framework.

Very helpful post indeed.I was wondering though: Y...

2008-12-04T17:54:00.000+08:00

Very helpful post indeed.

I was wondering though: You store a reference to a servlet request, and you access that request without initializing it.

where is the code for setting the request to a valid object?

I was implementing this example in a purely Java a...

2008-08-02T01:20:00.000+08:00

I was implementing this example in a purely Java and Spring environment and ran into a null pointer exception in the newFileUpload method. It turns out that newFileUpload is called by the parent constructor and pListener hasn't been injected yet. After I looked around I found that the '?' means ignore null pointer errors. So for you Java guys, add line 56 to the if statement above it.

So when using the spring object MultipartFile, the...

2008-06-26T09:47:00.000+08:00

So when using the spring object MultipartFile, then thats when it uses the stream?

So does spring automagically use streaming when th...

2008-06-26T08:09:00.000+08:00

So does spring automagically use streaming when the file size is greater than some threshold?

How and where is this configured?

so if it's possible to have speed , time remaining...

2008-04-09T16:34:00.000+08:00

so if it's possible to have speed , time remaining, ... , i(d like too ;)

Hi,Wonderfull grails script but :it's possible to ...

2008-04-09T14:41:00.000+08:00

Hi,
Wonderfull grails script but :
it's possible to have some others informations about the upload like %. So we have the progress barre but can we have "12%" refresh for example
please.
best regards
thx
Julien Taverne

@some guy: That's right. The Commons File Upload f...

2008-04-09T14:00:00.000+08:00

@some guy: That's right. The Commons File Upload framework won't initialize the streaming upload for files that are below the configured threshold. Therefore we also won't have ProgressListener, and no progress info.

OK, I understand. The file I was uploading was too...

2008-04-08T12:46:00.000+08:00

OK, I understand. The file I was uploading was too small.

I tried a 100mb and I didn't get that exception

//if we don't have progress info in the session, it could
//indicate that the file upload was to small to require streaming
//and possibly finished before we could check progress
if (progressMap?.bytesRead == null){

Hi, I just downloaded the app and ran it in grail ...

2008-04-08T12:41:00.000+08:00
Hi, I just downloaded the app and ran it in grail 1.0.1, I get a missing property exception:

No such property: AjaxProgressListener for class: StorageController

Of course, this is supposedly injected right? I've looked to see if any configuration might need changing - but since I was hoping to find out how this worked, I am a little lost as to why it is broken :-)

jlorenzen: As I'm tying progress information to se...

2008-03-31T10:50:00.000+08:00
jlorenzen:

As I'm tying progress information to session in the example, concurrent uploads from users should be fine.
However if the same user opens up another tab in their browser and starts uploading concurrently the results will probably be "undefined" :)

Stephan.

This is really neat.I am also working on a file up...

2008-03-28T22:50:00.000+08:00
This is really neat.
I am also working on a file upload capability with extjx; unfortunately not with grails though.

I am curious to know what happens with your listener if multiple users are uploading files concurrently.

How does your update method determine which file you are being updated on?

Good article, It could be fantastic view the progr...

2008-03-22T22:26:00.000+08:00
Good article, It could be fantastic view the progress bar in a plugin :D