I want to write a simple python web service which will read the arguments provided in the called url and based on that return some basic string.
In order to get started and get a better understanding of the whole thing, I'd like to start by creating a "calculator" web service which will take two numbers and an operator and based on these inputs return the mathematical result.
For example if I call from my browser something like:
I'd like the python script to figure out (i guess most probably by some simple switch/case statement) that it should execute something like this: "return number1 + number2" and return the result 25 to the caller.
I am sure this shouldn't be a too big problem to implement this in python since it isn't anything too fancy, but, as a beginner, I wasn't able to find the right starting point.
Any help is appreciated.
Have a look at the WSGI specification.
You can also use a framework like bottle which make your work easier:
from bottle import route, run, request @route('/calculate') def index(): if request.GET.get('operation') == 'addition': return str(int(request.GET.get('number1')) + int(request.GET.get('number2'))) else: return 'Unsupported operation' if __name__ == '__main__': run(host='22.214.171.124', port=12345)
Or even with flask:
from flask import Flask app = Flask(__name__) @app.route('/calculate') def calculate(): if request.args.get('calculate') == 'addition' return int(request.args.get('number1')) + int(request.args.get('number2')) else: return 'Unsupported operation' if __name__ == '__main__': app.run()