from flask_cors import CORS

app = Flask(__name__)
CORS(app, supports_credentials=True)

if __name__ == "__main__":
    app.run()

@app.after_request
def af_request(resp):     
    """
     #请求钩子，在所有的请求发生后执行，加入headers。
    :param resp:
    :return:
    """
    resp = make_response(resp)
    resp.headers[‘Access-Control-Allow-Origin‘] = ‘*‘
    resp.headers[‘Access-Control-Allow-Methods‘] = ‘GET,POST‘
    resp.headers[‘Access-Control-Allow-Headers‘] = ‘x-requested-with,content-type‘
    return resp