[SOLVED] Which is the best practice for sending a file to a custom node form?

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Which is the best practice for sending a file to a custom node form?

In my custom node I would like to allow to send a file to a custom end point (made via RED.admin.post) who parse the file and output a json to the caller.

Is there a way to do this?

EDIT: I solved in this way:

In template .html file

<script type="text/x-red" data-template-name="...">

  <form id="myForm">
    <input id="myFile" type="file" name="fileToUpload">
    <input id="file-submit" type="submit" value="Import data from file" name="submit">
  </form>
...

        oneditprepare: function () {
            $('#file-submit').click(function (e) {
                var fd = new FormData();
                fd.append('file', $('#myFile')[0].files[0]);
                var file = fd.get('file');
                var blb = file.slice();
                var reader = new FileReader();
                // This fires after the blob has been read/loaded.
                reader.addEventListener('loadend', (e) => {
                    var fileData = e.srcElement.result;
                    $.ajax({
                        url: '/file-upload',
                        data: { fileData: fileData},
                        method: 'POST',
                        success: function (data) {
                            populateForm(data);
                        }
                    });
                });
                // Start reading the blob as text.
                reader.readAsBinaryString(blb);
            });