update CORS

README.md

@@ -20,13 +20,14 @@ This project does depend on python packages.
 * [```pip install importlib```](https://pypi.org/project/importlib/) Optional (for python 2.*)
 
 ### Wikstraktor Server
-If you want wikstraktor as a server, you need to install [flask](https://flask.palletsprojects.com/en/2.0.x/installation/), and best practice is to do so in a [virtual environment](https://docs.python.org/3/library/venv.html#module-venv).
+If you want wikstraktor as a server, you need to install [flask](https://flask.palletsprojects.com/en/2.0.x/installation/) and [flask-cors](https://flask-cors.readthedocs.io/en/latest/), and best practice is to do so in a [virtual environment](https://docs.python.org/3/library/venv.html#module-venv).
 
 The following commands are extracted from the aforementionned documentation, it is probably more secure to click on the link and follow the modules documentation :
 ```bash
 python3 -m venv wikstraktorenv #create wikstraktorenv environment
 . wikstraktorenv/bin/activate #activate environment
 pip install Flask #install Flask
+pip install -U flask-cors #install Flask cors
 ```
 
 ## Use

wikstraktor_server.py

@@ -2,10 +2,13 @@
 from flask import Flask #server
 from flask import request #to handle the different http requests
 from flask import Response #to reply (we could use jsonify as well but we handled it)
+from flask_cors import CORS #to allow cross-origin requests
 from wikstraktor import Wikstraktor
 import wikstraktor_server_config as config
 
 app = Flask(__name__)
+CORS(app)
+
 @app.route('/', methods=['GET'])
 def index():
     c = request.remote_addr