flaskapp - Two api resources in two different python scripts

Question

I have a use case were I need to run multiple python scripts from a same server through flask.

script1.py is as below

app = Flask(__name__)
api = Api(app)

class App(Resource):
   def post(self):
       resp = Response('successfully tested')
       return(resp)
        
api.add_resource(App, '/testapp')


if __name__ == "__main__":

    app.run(port=6000, host="0.0.0.0", use_reloader=True)

Similarly script2.py is

app = Flask(__name__)
api = Api(app)

class Test(Resource):
   def post(self):
   resp = Response('successfully tested')
   return(resp)
        
api.add_resource(Test, '/test')


if __name__ == "__main__":

    app.run(port=5000, host="0.0.0.0", use_reloader=True)

Individually when I execute both works as expected, http://0.0.0.0:5000/test and http://0.0.0.0:5000/testapp works.

But when I configure these scripts as service and try to post the URLs one of them will work and other is failing.

Am I doing right?

what do you mean as service? Are you using some sort of proxy? Do you want implement a load balancer? The code you show seems not relevant. — The Fool
– The Fool, Commented Aug 5, 2020 at 17:48
@TheFool I have converted the script as Windows Service. Yes you are right I need to run through loadbalancer but before that I need both scripts work on local PC. The code is not full there are two API resources with 2 end points "/test" and "/testapp" Will this not work this way? — goe
– goe, Commented Aug 5, 2020 at 17:52

chowmean · Accepted Answer · 2020-08-05 18:05:43Z

1

You cannot do this as the flask server needs to bind to a port[5000]. You have to run these two scripts on a different port and then you can use Nginx to proxy pass them based on the API rules. Something like below

https://serverfault.com/questions/650117/serving-multiple-proxy-endpoints-under-location-in-nginx You can use any other reverse proxy also you are not bound to use Nginx.

answered Aug 5, 2020 at 18:05

chowmean

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3 Comments

goe Over a year ago

Thank you heaps. This helps.

goe Over a year ago

If this has to be through https SSL 443 how to handle?

chowmean Over a year ago

You can simply do the ssl-offloading on the nginx and then forward it to the respective upstream. Let you nginx listen for requests on 443 and based on your resource like /api/v1 or api/v2 you can forward to 5000 service1 or 5001 service2

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