xhr send base64 string and decode it in the server to a file

Question

I am trying to to send a base64 encoded img to server,the javascript looks like

var xhr=new XMLHttpRequest()
var reader=new FileReader()
reader.on         


        

Answer 1

reader.readAsDataURL(file)

A data URL is NOT the same as a base64 version of the file. You get extra garbage in it. It looks like this:

data:[][;charset=][;base64],

See Wikipedia.

Try doing a simple regex on it:

var data = dataURL.match(/,(.*)$/)[1];

Or, in your code,

xhr.send(e.target.result.match(/,(.*)$/)[1]);