can you add HTTPS functionality to a python flask web server?

Don't use openssl or pyopenssl its now become obselete in python

Refer the Code below

from flask import Flask, jsonify
import os

ASSETS_DIR = os.path.dirname(os.path.abspath(__file__))
app = Flask(__name__)


@app.route('/')
def index():
    return 'Flask is running!'


@app.route('/data')
def names():
    data = {"names": ["John", "Jacob", "Julie", "Jennifer"]}
    return jsonify(data)


if __name__ == '__main__':
    context = ('local.crt', 'local.key')#certificate and key files
    app.run(debug=True, ssl_context=context)

• To run HTTPS functionality or SSL authentication in your flask application, first install "pyOpenSSL" python package

pip install pyopenssl

• Next step is to create cert.pem and key.pem

openssl req -x509 -newkey rsa:4096 -nodes -out cert.pem -keyout key.pem -days 365

• Copy generated cert.pem and key.pem in your flask application project

• Add ssl_context=('cert.pem', 'key.pem') in app.run(), like in the example below.

from flask import Flask, jsonify

app = Flask(__name__)


@app.route("/")
def index():

    return "Flask is running!"


@app.route("/data")
def names():

    data = {"names": ["John", "Jacob", "Julie", "Jennifer"]}

    return jsonify(data)


if __name__ == "__main__":

    app.run(ssl_context=("cert.pem", "key.pem"))

Deploy Flask on a real web server, rather than with the built-in (development) server.

See the Deployment Options chapter of the Flask documentation. Servers like Nginx and Apache both can handle setting up HTTPS servers rather than HTTP servers for your site.

The standalone WSGI servers listed would typically be deployed behind Nginx and Apache in a proxy-forwarding configuration, where the front-end server handles the SSL encryption for you still.

this also works in a pinch

from flask import Flask, jsonify


from OpenSSL import SSL
context = SSL.Context(SSL.PROTOCOL_TLSv1_2)
context.use_privatekey_file('server.key')
context.use_certificate_file('server.crt')   


app = Flask(__name__)


@app.route('/')
def index():
    return 'Flask is running!'


@app.route('/data')
def names():
    data = {"names": ["John", "Jacob", "Julie", "Jennifer"]}
    return jsonify(data)


#if __name__ == '__main__':
#    app.run()
if __name__ == '__main__':  
     app.run(host='127.0.0.1', debug=True, ssl_context=context)