Understanding of GWT Upload

Hi All,

I have a requirement where I have to support upload of around 500MB files (zip file), so wanted to understand how GWTUpload work:

1) Does it chunk the data, or it sends the data as a continuous stream and keep it in memory ? If yes then it would lead to out-of-memory. 

2) Is it a reliable library for uploading huge data. 

If this does not support, then are there any other libraries that would support ?  

Any help would be greatly appreciated.

Thanks, 
Snehil Parekh.

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