javascript - Express res.download() and Ajax `POST` -


i using expressjs res.download() (http://expressjs.com/en/api.html)

to send .exe installer file. don't know if need use blob or file javascript apis?

i triggering call via post action in ajax:

$('#download-form').validate({     submithandler: function (form) {         $.ajax({           type: $(form).attr('method'),           url: $(form).attr('action'),           data: $(form).serialize(),           success: function (data) {               // alert(data);           },           progress: function(e){             //make sure can compute length             if(e.lengthcomputable) {                 //calculate percentage loaded                 var pct = (e.loaded / e.total) * 100;                  //log percentage loaded                 console.log(pct);             }             //this happens when content-length isn't set             else {                 console.warn('content length not reported!');             }           }       });     }   });

as i'm 'requesting' file in javascript, , appropriate progress notifications, display 'ajax' loader (rather traditional download).

i've seen suggestions of "opening" response new page in "hidden iframe", or using browser api. i'm fine - haven't found example.

i interested in building downloader similar have seen on https://mega.nz/, when file downloading ajax progress bar displayed, and then user prompted save file when download complete?


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