Orbeon - how to validate file content uploaded by user

Question

I need to validate content of pdf file sent by "File Attachement" component, using Webservice, uploaded by user.

How to do that ?

Action Value Change is not called

ver.orbeon-4.4.0.201311042036-PE Thanks Piotr

Answer 1

That probably requires a few steps:

1. Determine when the upload is complete. With recent versions of Orbeon Forms, the event xxforms-upload-done can be used.

2. Send the content of the uploaded file to a service. The file can be a binary file, but there is a way to submit binary content .

3. Depending on what the service returns, mark the control valid or invalid. You could do this with an attribute on the element holding the uploaded file's URL, eg: <my-upload valid="true"/> and then use a constraint like constraint="@valid = 'true'" .