确实JSONP需要服务器的修改？ [英] Does JSONP require server modifications?

问题描述

据我所知，JSONP是一种技术来绕过同源策略。你基本上是指你的JSON服务的服务器端点的脚本标记，因为脚本标记可免除SO政策。

I understand that jsonp is a technique to get around the same origin policy. You basically refer to your json serving server endpoint in a script tag, because script tags are exempt from the SO policy.

我的问题是：假设一台服务器有一个端点提供了JSON，有没有在服务器上，使客户端使用JSONP必要的任何修改

My question is: Assuming a server has an endpoint that serves up json, are there any modifications necessary on the server to make use of jsonp in the client?

我觉得没什么，但要确保......

I think no, but want to be sure....

推荐答案

是的，JSONP略有不同，当它呈现，让您的服​​务器需要支持它。

Yes, JSONP is slightly different when it renders, so your server needs to support it.

JSON看起来是这样的：

JSON looks like this:

{ "name": "value" }

而JSONP是这样的：

Whereas JSONP looks like this:

functionName({ "name": "value" });

如果无论你正在使用它你盖的支持，但它是不一样的支持只是JSON。当服务器收到一个请求，例如： http://example.com/json?callback=functionName ，上面的是你应该渲染，因为它的外观在该页面是这样的：

If whatever you're using supports it you're covered, but it's not the same as supporting just JSON. When the server gets a request, for example: http://example.com/json?callback=functionName, the above is what you should render, because how it looks in the page is this:

<script type="text/javascript" src="http://example.com/json?callback=functionName"></script>

---

这意味着运行需要退回，作为说明的东西，这是有效的：

---

This means something that runs needs to be returned, as an illustration, this is valid:

<script type="text/javascript">
  functionName({ "name": "value" });
</script>

如果你的服务器的没有的支持JSONP这实际上是这样的：

If your server didn't support JSONP it would effectively be this:

<script type="text/javascript">
  { "name": "value" }
</script>

......，你会得到语法错误，因为这不是有效的JavaScript。

...and you'll get syntax errors, since that's not valid JavaScript.

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