main.py

import io
import uuid
import time

from flask import Flask, jsonify, request, send_file, render_template, make_response


APP = Flask(__name__)
VERSION = "1.0"


def process(data):
    # do some work
    time.sleep(10)

    # load file 
    newdata = {}
    return newdata


@APP.route('/upload_form', methods=['GET'])
def get_upload_form():
    return render_template("upload_form.html")


@APP.route('/upload_file', methods=['POST'])
def process():
    if 'inputfile' in request.files:
        inputfile = request.files['inputfile'].get()
    else:
        APP.logger.info('no file')
        return make_response(jsonify(error="no file"), 400)

    retval = process(inputfile)
    return make_response(jsonify(retval))

if __name__ == "__main__":
    from waitress import serve
    port = 8000
    serve(APP, host="0.0.0.0", port=port)