Polymer 3.0 how to save image upload to my folder in vaadin-rich-text-edito

Hi everyone, i’m just a new member who stucking with a problem about images upload in vaadin-rich-text-editor components. Currently i’m working with a polymer project and when i submit my form with an image i get this bug.

So i have displayed their value to an input to know and i saw the “src” of img tag when upload.

So i’m wondering is there any ways to save my images to my server folder like vaadin-upload