[SOLVED] Grails file upload: how to set the value of the input file when the view is rendered

Grails file upload: how to set the value of the input file when the view is rendered

I have an upload action that receives a file from a form on a view. Validation is done when the file is uploaded.

If the file is not valid, the view is shown again and the input type="file" value should be pointing to the file which the upload failed for.

This doesn't seem to work: (code from the view)

<input type="file" name="opt" value="${params.opt}" />

This is rendered to the user:

<input type="file" name="opt" value="org.springframework.web.multipart.commons.CommonsMultipartFile@c9b839">

Any ideas?

Solution

It seems this is not possible due security reasons, the thing is a server can access client files that might contain private info, if the server knows the path.

More info: How to set a value to a file input in HTML?

I might need to ask the user to select the file again, or do something like AJAX file upload: http://blog.teamtreehouse.com/uploading-files-ajax