main.py

from flask import Flask, render_template
from flask_wtf import FlaskForm
from wtforms import FileField, SubmitField
from werkzeug.utils import secure_filename
import os
from wtforms.validators import InputRequired
from xmljsonconverter import xmltojson

app = Flask(__name__)
app.config["SECRET_KEY"] = "BANANA"
app.config["UPLOAD_FOLDER"] = "static/files"


class UploadFileForm(FlaskForm):
    file = FileField("File", validators=[InputRequired()])
    submit = SubmitField("Upload Any File")


@app.route("/", methods=["GET", "POST"])
@app.route("/home", methods=["GET", "POST"])
def home():
    form = UploadFileForm()
    if form.validate_on_submit():
        file = form.file.data
        file.save(
            os.path.join(
                os.path.abspath(os.path.dirname(__file__)),
                app.config["UPLOAD_FOLDER"],
                secure_filename(file.filename),
            )
        )
        newfile = "Book.json"
        xmltojson(
            os.path.join(
                os.path.abspath(os.path.dirname(__file__)),
                app.config["UPLOAD_FOLDER"],
                secure_filename(file.filename),
            ),
            os.path.join(
                os.path.abspath(os.path.dirname(__file__)),
                app.config["UPLOAD_FOLDER"],
                secure_filename(newfile),
            ),
        )

    return render_template("index.html", form=form)


if __name__ == "__main__":
    app.run(debug=True)