How can one configure flask to be accessible via public IP interface?

Question

I am unable to resolve any methods externally via their url once I set the SERVER_NAME or host property in flask. The following is my app init config:

flask_sqlalchemy import SQLAlchemy
from flask.ext.cors import CORS
__authors__ = 'DarkStar1'

from flask import Flask

app = Flask(__name__)
app.config.from_object('config')
app.config['DEBUG'] = True
app.config['SERVER_NAME'] = '0.0.0.0'
#app.run(host='0.0.0.0')
CORS(app)

db = SQLAlchemy(app)

from oms import user_service, person_service

I can set the DEBUG param/property but attempting to set the host or SERVER_NAME results in all urls, http://< hostname >:5000/test for example, resulting in 404s. Since the server is a remote dev server, I am able to tunnel and get 200s on all urls from flask via localhost. The port is enabled and the flask version I am working with is 0.10.1 on python 2.7.6. I have search and read docs to no avail.

score 12 · Accepted Answer · edited Feb 07 '19 at 18:33

12

run flask using

app.run(host="0.0.0.0:PORT#")

look for your IPv4 Address using ifconfig in your command prompt, and in your browser you can access your app using your ipaddress:port#

You might have to configure your router (port forwarding) to make it publicly available, otherwise you can download/use https://ngrok.com/ ----> This will expose your localhost behind a NaT or Firewall to the internet.

Once you download, you can configure it by running

ngrok http localhost:5000

this will provide you a RANDOMsubdomain.ngrok.io and you can test your app from pretty much anywhere

edited Feb 07 '19 at 18:33

Nathan majicvr.com

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answered Jun 06 '16 at 16:10

glls

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run.app() or app.run()? – Dark Star1 Jun 06 '16 at 22:53
1

Got it up and running with app.run(host="0.0.0.0") – Dark Star1 Jun 07 '16 at 07:47
I had forgotten to add host and the quotes, thx – glls Jun 07 '16 at 13:33
Even simpler, use `pyngrok` (`pip install pyngrok`) to invoke and manage `ngrok` right from within your `server.py`. [Here's a full Flask example](https://pyngrok.readthedocs.io/en/latest/integrations.html#flask), but basically you'd just need to `from pyngrok import ngrok` and then `ngrok.connect(5000)` when you're defining the routes. – alexdlaird May 07 '20 at 00:16
nice, did not know of this. – glls May 07 '20 at 01:05

How can one configure flask to be accessible via public IP interface?

1 Answers1