server.py

from flask import Flask, jsonify, render_template, request, redirect, url_for
import cloudinary.uploader
import os

# CLOUDINARY INFORMATION
CLOUDINARY_KEY = os.environ['CLOUDINARY_KEY']
CLOUDINARY_SECRET = os.environ['CLOUDINARY_SECRET']
CLOUD_NAME = "heather-mahan" #"YOUR-CLOUD-NAME-HERE"

app = Flask(__name__)

# Flask routes

@app.route('/')
def homepage():
    """Show the homepage"""
    return render_template('homepage.html')


@app.route('/media-upload-form')
def show_upload_form():
    """Show the simple media upload form"""
    return render_template('media-upload-form.html')


@app.route('/async-media-upload-form')
def show_async_upload_form():
    """Show the async media upload form"""
    return render_template('async-media-upload-form.html')


@app.route('/show-image')
def show_image():
    """Show the saved media on a web page"""
    img_url = request.args.get('imgURL')
    return render_template('results.html', img_src=img_url)


@app.route('/post-form-data', methods=['POST'])
def post_form_data():
    """Process form data and redirect to /show-image page"""
    my_file = request.files['my-file']
    img_url = upload_to_cloudinary(my_file)
    add_user_img_record(img_url)
    return redirect(url_for('show_image', imgURL=img_url))


@app.route('/post-form-data-async', methods=['POST'])
def post_form_data_async():
    """Process form data and return the url generated by Cloudinary"""
    my_file = request.files['my-file']
    img_url = upload_to_cloudinary(my_file)
    add_user_img_record(img_url)
    return jsonify(img_url)


# Helper functions

def upload_to_cloudinary(media_file):
    """Upload media file to Cloudinary"""
    result = cloudinary.uploader.upload(media_file, 
                                        api_key=CLOUDINARY_KEY, 
                                        api_secret=CLOUDINARY_SECRET, 
                                        cloud_name=CLOUD_NAME)
    return result['secure_url']


def add_user_img_record(img_url):
    """Stub function for persisting data to database"""
    print("\n".join([f"{'*' * 20}", "SAVE THIS url to your database!!",
                    img_url, f"{'*' * 20}" ]))


if __name__ == '__main__':
    app.run(debug=True, host='0.0.0.0')