xsltforms-support

[Xsltforms-support] XForms Upload with AJAX

[COUTHURES A. <ala...@ag...>]

Hello,

XForms Upload seems impossible to be fully implemented with AJAX...

File upload with AJAX is usually performed with a frame or iframe 
element and the submission appears to be limited to POST method.

XForms Upload is able to integrate binary contents within an instance to 
be sent with any kind of submission.

Ubiquity XForms doesn't integrate Upload support yet. EMC Test Suite 
Report says that the corresponding tests (those tests don't include 
submission...) are OK for them but it's impossible to verify this !

I'm now thinking of a POST-only submission with a field containing the 
instance but with links to other fields in the same submission so the 
server can automatically build the desired instance with the binary part 
inside before calling processing treatments.

Any suggestions ?

What do you think about this ?

-Alain

Re: [Xsltforms-support] XForms Upload with AJAX

[COUTHURES A. <ala...@ag...>]

Hello,

What would you think about this bad trick for xforms:upload support in 
XSLTForms :

   1. as soon as it is selected or just before submission, the
      corresponding file is uploaded to the server, alone, in background
   2. the server creates a temporary file for it and returns the
      corresponding URI (security problems to consider...)
   3. this URI is stored in the instance and normal processing can continue

For example, the URI could then used to be rendered as an image with an 
xforms:output.

For a base64 storage in the instance, the server should return the 
contents instead. Yes, the file contents would be sent 3 times instead 
of just one time. Would this be a big problem ? BTW, inline images are 
not supported in IE7 but in IE8 (workarounds seem to exist for IE7...).

Anyway, a sort of generic echo program would be required on the server...

Thank you for your comments,

-Alain

Re: [Xsltforms-support] XForms Upload with AJAX

[Dominique R. <dom...@or...>]

I just have read your trick proposal.
Unfortunately any other solution leads to same problem : security,
overloading, server dependencies

Better to detect unecessary intermediate uploading

 

Dominique

  _____  

De : COUTHURES Alain [mailto:ala...@ag...] 
Envoyé : vendredi 15 mai 2009 11:20
À : xsl...@li...
Objet : Re: [Xsltforms-support] XForms Upload with AJAX

 

Hello,

What would you think about this bad trick for xforms:upload support in
XSLTForms :

1.	as soon as it is selected or just before submission, the
corresponding file is uploaded to the server, alone, in background
2.	the server creates a temporary file for it and returns the
corresponding URI (security problems to consider...)
3.	this URI is stored in the instance and normal processing can
continue

For example, the URI could then used to be rendered as an image with an
xforms:output.

For a base64 storage in the instance, the server should return the contents
instead. Yes, the file contents would be sent 3 times instead of just one
time. Would this be a big problem ? BTW, inline images are not supported in
IE7 but in IE8 (workarounds seem to exist for IE7...).

Anyway, a sort of generic echo program would be required on the server...

Thank you for your comments,

-Alain