main.py

from flask import Flask, request, Response
from flask_cors import CORS
import json

app = Flask(__name__)
CORS(app)

url = "/control/"

@app.route(url+"hello")
def hello_world():
    print("in hello")
    return "blabla"

@app.route(url+"add_group", methods=["POST"])
def add_group():
    print("in add group")
    json_req = request.get_json()
    print("----- " + str(json_req) + " -----")
    groups = read_groups()
    groups.append(json_req)
    print("----- " + str(groups) + " -----")
    with open("/home/henrik/workspace/jf/voelkerball-python/groups", "w") as file:
        json.dump(groups, file)
    return "", 204

@app.route(url+"get_groups", methods=["GET"])
def get_groups():
    print("in get groups")
    groups = read_groups()
    print("----- " + str(groups) + " -----")
    return Response(json.dumps(groups), mimetype="application/json")

def read_groups():
    with open("/home/henrik/workspace/jf/voelkerball-python/groups", "r") as file:
        groups = json.load(file)
        return groups
    return ""