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jsonp的原理 #49

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Seasons123 opened this issue Jul 21, 2017 · 0 comments

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Seasons123 commented Jul 21, 2017

同源策略限制，ajax无法发送跨域请求
一些HTML标签天生拥有跨域请求能力，如<script><iframe>
用动态生成<script>节点的方式来发起跨域请求
请求时需要将回调的函数名称发送后服务端
服务端用接收到的函数名称包裹数据给前端返回
像jquery实现的jsonp，会自动生成有唯一标识的函数名，不必自己操心

Seasons123 closed this as completed

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