Ajax FileUpload not working from Android 2.3 device.

[Josh Berry]

I'm trying to make a fairly basic web app where users can upload
images and I used the starting point of
https://github.com/dpp/starting_point/tree/ajax_upload. It works
wonderfully everywhere but on Android 2.3 devices. (I don't have
newer devices to test with. Haven't tried it in emulator.)

The only real customization that I can think of that I did was that I
am doing this from an ajax form, so I have to have a script repopulate
the "action" tag of the form on page load. I do note that there is an
open bug for the plugin about min size of the file. I tried that
locally with no success. (And the demo for the plugin works.)

Has anyone else had success with this scenario?

The complete app is available at
http://code.google.com/p/commuters-connect/. I should warn that this
has been my main learning point for lift, so I think I am doing some
things less than optimally. (So, if anyone has some suggestions, I'm
all ears!! :) )

Thanks!

[Augustus Kling]

I doubt you're getting file transfers to work via AJAX on Android 2.3 devices – it simply does not support the required File API. I think the required API is available as of Android 4.
For an explanation what I simply called API refer to Mozilla's samples where it says “Using FormData object” in https://developer.mozilla.org/En/XMLHttpRequest/Using_XMLHttpRequest.

Depending on what level of error handling you require, it might be possible to replace the AJAX transmission with an ordinary form POST to an iframe.

Hope that helps.

[Josh Berry]

On Wed, Apr 4, 2012 at 3:08 PM, Augustus Kling <augustu...@gmail.com> wrote:
> I doubt you're getting file transfers to work via AJAX on Android 2.3
> devices – it simply does not support the required File API. I think the
> required API is available as of Android 4.
> For an explanation what I simply called API refer to Mozilla's samples where
> it says “Using FormData object” in
> https://developer.mozilla.org/En/XMLHttpRequest/Using_XMLHttpRequest.

Makes sense. I should have said the JQuery FileUpload. The device I
have seems to work on the demo page, though I must confess I am not
sure if I have the latest jquery on my webapp now (something I didn't
think of till just now.) I'll check that as soon as I get a moment.
I did just get a chance to try it from ICS, and that seems to work no
problems.

> Depending on what level of error handling you require, it might be possible
> to replace the AJAX transmission with an ordinary form POST to an iframe.

I really was only going to utilize this as an extremely pleasant
surprise for working. With just a few css changes, this app was "just
working" on an android, which I found incredibly nice.

My suspicion for it not working was that it looks like it my require
the enctype=multipart that lift:form.ajax strips out of my form tag.
I was hoping others had encountered that and I was just oblivious.
(Actually, I should make sure that setting the action of the form
element to a legitimate value won't cause other troubles. Is that a
bad idea?)

Thanks!