flask+jsonp跨域前后台交互

jsonp原理: script,link,src 是不受同源策略影响的，并可提供callback参数回调，可调用已定义的js方法。可通过动态创建对应标签实现。

# -*- coding: utf-8 -*-
from flask import Flask, jsonify
import psutil, time,json 
app = Flask(__name__)#实例化app对象

@app.route('/test_post/aa', methods=['GET','POST'])#路由
def test_post():
     memKeys = ["total", "available", "percent", "used", "free"]#查看内存信息
    memVaules = psutil.virtual_memory()
     memInfo = dict(zip(memKeys, memVaules))
     memInfo = {k: str(v / pow(1024.0, 3)) + 'GB' for k,
                                                      v in memInfo.items() if k != 'percent'}
     memInfo['percent'] = psutil.virtual_memory().percent
     return "successCallback"+"("+json.dumps(memInfo)+")"#将结果以json形式返回，通过jsonp与前台交互

if __name__ == "__main__":
     app.run(
     host = '0.0.0.0',#任何ip都可以访问
     port = 7777,#端口
     debug = True
 )

<script src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.js"></script>
<script>
    $('#search').click(function () {
        $.ajax({
            type: 'GET',
            url: 'http://192.168.1.106:7777/test_post/aa',
            dataType: 'jsonp', //希望服务器返回json格式的数据
            jsonp: "callback",
            jsonpCallback: "successCallback",//回调方法
            success: function (data) {
                console.log(data);
            }

        });
    });
</script>