如何在iframe中强制xml概述/漂亮打印？

Question

An xml -file is loaded from a different domain within an iframe in a Webkit/Chrome browser and the HTTP Content-Type is set to application/xml .
Generally xml would be colored and pretty-printed, using a built-in browser content-script. In the iframe , the same xml-file will only show the text within the tags and no colored outline, as would be expected with browser-scripts turned off.

Browser:

Iframe:

( different content )

Response headers:

HTTP/1.1 200 OK
Date: Thu, 29 Aug 2013 08:52:55 GMT
Server: Apache
Vary: Cookie
Content-Length: 154
Keep-Alive: timeout=15, max=10000
Connection: Keep-Alive
Content-Type: application/xml

Adding Access-Control-Allow-Origin:* to the response-header didn't change anything.

Update: HTML :

<form id="api_output" target="iframepostform" action="https://example.com/api/"
     method="POST" accept-charset="utf-8">....
     <button type="submit">Send</button>
</form>

<iframe class="clearfix" src="" name="iframepostform" 
      id="iframepostform" seamless="seamless"></iframe>

What is the simplest solution to fix this, without abandoning iframes and resorting to XHR requests?

Answer 1

Use Yahoo Pipes or YQL as a proxy formatter service. Here are some examples:

• How to get the formatted view of YQL as result?
• Yahoo Pipes to enrich RSS descriptions dynamically with ${title} variable?