使用jsonp的extjs，从远程URL访问数据 [英] extjs using jsonp,Accessing data from remote url

问题描述

使用extjs，从一个系统运行服务器，在另一个系统中提供url，并在extjs版本4.02中使用JSONP，当我检查响应时以json格式获取数据时，尝试在控制台中打印或商店即时通讯没有得到..这是我的extjs代码...

with extjs,i m runnig the server from one system,giving the url in another system and i m using JSONP in extjs ver:4.02,when i check in response i m getting data in json format,when i try to print in console or Store im not getting..here is my extjs code...

<script type="text/javascript">

            Ext.Ajax.cors = true;
            Ext.Ajax.useDefaultXhrHeader = false;   

        Ext.define('User', {
            extend: 'Ext.data.Model',
            fields: ['empid', 'name', 'email']
        });

    var myStore = Ext.create('Ext.data.Store', {
                    model: 'User',                     
                    autoLoad:true,
                    proxy: {
                        type: 'jsonp',

                      // url : 'data/tagfamily.json',
                        url:'http://192.168.7.70:8080/palamanagement/user/getAllRecords',

                                            },
                    listeners:{
                        'load':function( store, records, successful, eOpts ){                                             
                            alert(records);
                            console.log(records);

                        }
                    }
                });

推荐答案

您实际上必须返回如下内容:

You literally have to return something like the following:

someCallback({
    users: [
        {
            id: 1,
            name: "Ed Spencer",
            email: "[e-mail]"
        }
    ]
});

因此，您已经按照需要的方式拥有了JSON；您只需要服务器响应即可将JSON包装在回调中，以便JSONP代理可以执行并向商店加载数据.

So you already have the JSON the way you need it; you just need your server response to wrap the JSON in the callback so that the JSONP proxy can execute and load your store with data.

因此，在处理JSONP请求时，服务器的脚本需要识别作为请求的一部分发送的回调"参数.然后，它需要使用此参数的值来包装JSON响应.

Therefore, when handling the JSONP request, your server's script needs to recognize the "callback" param that is sent as a part of the request. It then needs to use the value of this param to wrap your JSON response.

请务必阅读我本人和Oguz都发布的文档:他们很好地概述了需求.但是，如果不使用回调进行响应，那么您将永远无法获得标准的JSON响应来与JSONP代理一起使用.

Be sure to read the docs that both myself and Oguz have posted: they outline the requirement pretty well. But if you don't respond with a callback, you'll never get your standard JSON response to work with the JSONP proxy.

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