flask跨域

from flask import Flask
from flask_cors import CORS, cross_origin

app = Flask(__name__)
CORS(app)

@app.route("/")
def helloWorld():
  return "Hello, cross-origin-world!"

from functools import wraps
from flask import make_response
一：
@app.route(‘/result‘, methods=[‘GET‘, ‘POST‘])
def index():
    file_object = open(‘/home/pyspark_project/pyspark_output_result.json‘)
    try:
        result_text = file_object.read()
    finally:
        file_object.close()
    #
    rst = make_response(result_text)
    rst.headers[‘Access-Control-Allow-Origin‘] = ‘*‘

   
    return rst, 201