跨域问题

from flask import Flask, render_template, request, jsonify
app = Flask(__name__)
# 解决跨域问题
@app.after_request
def cors(environ):
    environ.headers['Access-Control-Allow-Origin']='*'
    environ.headers['Access-Control-Allow-Method']='*'
    environ.headers['Access-Control-Allow-Headers']='x-requested-with,content-type'
    return environ