Download multiple files from remote with progress bar updation using ruby on rails

Need to download multiple files from an external server through My Rails Application (Rails 3.2 + thin) and should show the download progress of individual files in view viz., a Web based HTTP download Manager which runs in user's machine.
How to implement it in Rails with progress bar or is there any other implementations/languages which I should go for. The main motive is to download the files individually with progress bar updation to user and not as a single large file and not based on FTP.