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jsonp请求数据的基本流程是什么

PHPz
Release： 2020-09-04 18:05:25
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jsonp请求数据的基本流程：首先在客户端注册一个callback；然后把callback的名字传给服务器；接着服务器先生成json数据；其次以javascript语法的方式，生成一个function；最后解析script标签即可。

jsonp请求数据的基本流程是什么

jsonp请求数据的基本流程是什么？

用jsonp请求数据的基本流程。

首先在客户端注册一个callback, 然后把callback的名字传给服务器。

服务器先生成 json 数据。

然后以 javascript 语法的方式，生成一个function , function 名字就是传递上来的参数 jsonp.

将 json 数据直接以入参的方式，放置到 function 中，这样就生成了一段 js 语法的文档，返回给客户端。

客户端浏览器，解析script标签，并执行返回的 javascript 文档，此时数据作为参数，传入到了客户端预先定义好的 callback 函数里.（动态执行回调函数）

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