[ Nodejs ]Upload unicode file to Dropbox V2

upload.js

var request = require('request');
var fs = require('fs');
//Reference https://www.dropboxforum.com/hc/en-us/community/posts/207458626-HTTP-header-Dropbox-API-Arg-could-not-decode-input-as-JSON

var charsToEncode = /[\u007f-\uffff]/g;

function http_header_safe_json(v) {
  return JSON.stringify(v).replace(charsToEncode,
    function(c) { 
      return '\\u'+('000'+c.charCodeAt(0).toString(16)).slice(-4);
    }
  );
}
var full_path = "/path/with/unicode/nội dung unicode";
var access_token = "xxxxxxxxxxxxxxxxxxx";
fs.readFile("/path/your/file", function read(err, data) {

    if (err) {
        throw err;
    }

    //common.log("Data ", data);

    //var content = data;
    var params = {
        path:full_path,
        "mode": "add",
        "autorename": true,
        "mute": false
    }

    var post_params = {
        url: 'https://content.dropboxapi.com/2/files/upload',
        method: "POST",
        //json: true,
        headers: {
            'Authorization': 'Bearer ' + access_token,
            'Dropbox-API-Arg': http_header_safe_json(params),
            'Content-Type': 'text/plain; charset=dropbox-cors-hack'
        },
        body:data
    }


    //

    request( post_params , function optionalCallback(error, response, body) {
        console.log("body",body);
    });

});