Node.js/ Express.js file uploading issue

[Mayur Tanna]

Hi All, 

I want help with the following issue. Kindly help me out.

I've a front end project with Express.js (A node framework) and back end is rest api (Java).

When I upload a large file, the browser gets hanged until it receives the response from server, which I don't want. I want to show progress bar but unfortunately it hangs up and not even allowing blinking of a gif file I'm showing on ajax call. 

The flow is something like this:

Upload file + Router (middle ware) + Rest service

Thanks,

Mayur