跨域 DOM/JS 之痛
我有一个我认为很简单的问题。我正在为外部学习资源编写 SCORM 包。它基本上是客户在其 LMS（学习管理系统）中安装的 HTML 页面中的 iframe。
外部资源需要能够告诉 LMS 用户已经完成了内容。因为LMS 和资源位于不同的域，所以显然存在 JS 安全墙阻止我直接通信。因此，当用户到达内容末尾时，外部资源将其 URL 设置为具有锚点，以便 URL 从 http://url 变为 http://url#complete< /code>
现在我试图从 iframe 获取位置，但失败得很惨。我尝试过 iframe.location 和 iframe.window.location （.window 也没什么）。我似乎无法掌握正确的事情。
iframe.src 显示原始源 URL，但当 iframe 更新到 #complete 版本时它不会改变。
有什么建议吗？还有其他选择吗？虽然我控制这两个页面，但除非有一个 javascript 方法来设置跨域通信，否则我无法设置 http 标头来允许它，因为我不控制 LMS 服务器 - 它只是推出我的静态页面。
编辑：作为替代方案，我正在考虑将已完成的事件存储在资源端的会话中（我猜，cookie 也可以工作），然后创建另一个页面，将其输出为 JSONP 语句。我认为这很容易做到，但对于应该简单的事情来说却要大惊小怪。我确实需要从外部站点打开 LMS 代码上的一个开关。
I have what I thought was a simple(ish) problem. I'm writing a SCORM package for an external learning resource. It's basically an iframe in a HTML page that the clients install in their LMS (Learning Management System).
The external resource needs to be able to tell the LMS that the user has completed the content. Because the LMS and resource are on different domains, there's obviously a JS security wall stopping me communicating directly. So when the user reaches the end of the content, the external resources sets its URL to have an anchor so the url goes from http://url to http://url#complete
Now I'm trying to get the location from the iframe and I'm failing miserably. I've tried iframe.location and iframe.window.location (.window is nothing too). I can't seem to get a handle on the right thing.
iframe.src shows me the original source URL, but it doesn't change when the iframe updates to the #complete version.
Any tips? Any alternatives? Although I control both pages, unless there's a javascript method to set cross-domain communication, I can't set the http header to allow it because I don't control the LMS server - it just pushes out my static page.
Edit: As an alternative, I'm considering storing the completed event in the session (a cookie would work too, I guess) at the resource end and then making another page that outputs that as a JSONP statement. I think it would be quite easy to do but it's a lot more fuss for something that should be simple. I literally need to flip one switch on the LMS code from the external site.
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使用easyXDM，它应该会让这变得相当容易。
使用它您可以进行跨域 RPC，无需服务器端交互。 github 上的自述文件非常好。
Use easyXDM, it should make this fairly easy.
Using it you can do cross-domain RPC with no server-side interaction. The readme at github is pretty good.