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Set Multiple CORS Domains in Flask

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Here is a simple way to set multiple cross-origin resource sharing (CORS) domains in Flask.

Install Flask-Cors

pip install flask-cors

Set Multiple CORS domains

from flask import Flask
from flask_cors import CORS

app = Flask(__name__)
CORS(app, resources={r"/": {"origins": ["Domain_1", "Domain_2"]}})

@app.route("/")
def hello():
    return "CORS-enabled web app!"

Reference

  • How to set multiple CORS domains in Flask (https://github.com/corydolphin/flask-cors/issues/212)
  • https://flask-cors.readthedocs.io/en/latest/
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