当我部署到Heroku时，这对我有用。
http://flask-cors.readthedocs.org/en/latest/
通过运行-安装flask-cors-
pip install -U flask-cors
from flask import Flaskfrom flask_cors import CORS, cross_originapp = Flask(__name__)cors = CORS(app)app.config['CORS_HEADERS'] = 'Content-Type'@app.route("/")@cross_origin()def helloWorld(): return "Hello, cross-origin-world!"
