finalImg.onload = function(event){
        var request = new XMLHttpRequest();
        request.onload = function (event) {
            if (request.readyState == 4 && request.status == 200) {
                console.log(request.responseText);
            }
        };

        request.open('post', '/setimageprofile', true);
        request.setRequestHeader('Content-type', 'image/JPEG;charset=UTF-8');
        request.send(finalImg);
    }

app.post('/setimageprofile', function(req, res) {
    //var request_data = '';
    var writable = fs.createWriteStream('./client_imgs/getusername.jpg');
    req.on('data', function(data){
        writable.write(data);
    });

    req.on('end', function() {
        writable.end();
    });
});

const bodyParser = require("body-parser");
var express = require('express');
var fs = require('fs');
var url = require('url');
var app = express();

app.use(bodyParser.urlencoded({
    extended: true
}));
app.use(bodyParser.json());

app.post('/setimageprofile', function(req, res) {
    var request_data = '';
    var writable = fs.createWriteStream('./client_imgs/getusername.png', 'base64');
    req.on('data', function(data){
        request_data += data;
    });

    req.on('end', function() {
        request_data = JSON.parse(request_data).data;
        var base64Data = request_data.replace(/^data:image/png;base64,/, "");
        console.log(base64Data);
        writable.write(base64Data);

        writable.end();
    });
});