How to put file upload limit in gwt client side?

Question

I want to make validation not to upload a file more than 100 MB in my file up loader widget. Currently I am uploading the file and transferring it on server side and there on server side checking the size. Is there any way so that I can check the file size on client side itself so that it will reduce the time required for file transfer to server side

Answer 1

You can't, because javascript doesn't provide any way to read the contents of a file that is stored locally.

You have to do it on server side. And its always a better option to validate on server side

Answer 2

You can do that using W3C Files API . There is a GWT wrapper for it at http://www.vectomatic.org/libs/lib-gwt-file .