Flask SSL Sample APP

flask_ssl_app.py

from flask import Flask
from flask_sslify import SSLify

"""
Option 1 : (pip install pyopenssl)
from OpenSSL import SSL
context = SSL.Context(SSL.SSLv23_METHOD)
context.use_privatekey_file('web.key')
context.use_certificate_file('web.crt')

Option 2 : (OOB : No install)
import ssl

context = ssl.SSLContext(ssl.PROTOCOL_TLSv1_2)
context.load_cert_chain('web.crt', 'web.key')

Option 3 : Native Flask (No imports needed)
"""

app = Flask(__name__)

context = ('web.crt', 'web.key')
sslify = SSLify(app)

@app.route("/")
def hello():
    return "Hello World!"

if __name__ == "__main__":
    context = ('web.crt', 'web.key')
    app.run( debug = True, ssl_context = context)
    #app.run( debug = True, ssl_context = 'adhoc')  # Generate Adhoc Certs

Thanks for this info. Using option 2, I have an issue with the crt and key files. Do you where are they stored by default? I looked into Python2/Python3 folders respectively and find nothing.

context.load_cert_chain('web.crt', 'web.key')
FileNotFoundError: [Errno 2] No such file or directory

Thanks for this info. Using option 2, I have an issue with the crt and key files. Do you where are they stored by default? I looked into Python2/Python3 folders respectively and find nothing.

context.load_cert_chain('web.crt', 'web.key')
FileNotFoundError: [Errno 2] No such file or directory

You need to make your certs and place them in the directory.

Here is a page explaining making a self-signed cert.
Self Signed Certificates - devcenter.heroku.com

if you need something for online, check out lets-encrypt.

Just want to note that if anyone's having issues loading the .crt and .key files and they had converted them from .pem files, it's possible the conversion wasn't necessary - it wasn't in my case (running on diet-pi using letsencrypt/certbot to gen keys) and in fact threw the following error:

OpenSSL.SSL.Error: [('PEM routines', 'get_name', 'no start line'), ('SSL routines', 'SSL_CTX_use_PrivateKey_file', 'PEM lib')]

when I use ssl_context = 'adhoc', everything runs but it doesn't show anything in the web browser. (it shoows in the terminal that it's running at https but doesn't work in the webbrowser) Any suggestion?

I have same problem as @antoniojsp , did you find a solution?

I'm having the same problem @antoniojsp @omarnazih
Any answers?

Tengo el mismo problema, alguna solución?