jQuery跨域iframe脚本 [英] jQuery cross domain iframe scripting

问题描述

我尝试访问加载外部网址的iframe的DOM。当然，我得到一个Permission denied for错误，由于跨域安全。如何使这项工作？我看到用json做的事情（但我不能从外部源获得一个json字符串）和用HTML5 postmessage做的事情。

I am trying to access the DOM of an iframe that loads an external URL. Of course that I get a "Permission denied for" error due to cross domain security. How can I make this work? I saw something done with json (but I can not get a json string from my external source) and something done with HTML5 postmessage.

你可以看到它生活在：
http://jsfiddle.net/QPBvJ/

you can see it live at : http://jsfiddle.net/QPBvJ/

代码是：

    $(document).ready(function(){
     $('#get').live('click', function() {

        var currentIFrame = $('#frameDemo');
        currentIFrame.contents().find("a").css("background-color","#BADA55");

        alert ("done")
    });
    });

<iframe src="http://api.jquery.com/" width="80%" height="600" id='frameDemo'></iframe>
<button id="get">Get</button>

使这项工作最简单的方法是什么。
谢谢

What would the the easiest way to make this work. Thank you

推荐答案

没有办法让这项工作。除非您尝试访问的外部域支持这样的过程CORS ， JSONP 或 postMessage 。

There is no way to make this work. Unless, the foreign domain you try to access supports a procedure like C.O.R.S, JSONP or postMessage.

有一些例外（像往常一样）：

There are a few exceptions (like always):

例如，如果你处理一个WebApp，你可以告诉你的用户他们必须授予跨域调用。

If you're dealing with a WebApp for instance, you can tell your users that they have to grant access to cross-domain-calls.

在Gecko / Firefox中，您可以调用

In Gecko/Firefox for instance, you can call

netscape.security.PrivilegeManager.enablePrivilege('UniversalBrowserRead')

它允许浏览器通过 ajax / iframes 访问外部域。在这种情况下，用户必须设置

which enables the browser to access foreign domains via ajax/iframes. In this scenario, an user has to set

signed.applets.codebase_principal_support

至 true 在 about：config

在这个世界的 Internet Explorers 中，有一个名为允许跨域访问深深隐藏在安全选项卡中，必须设置为 enable 。

In the Internet Explorers of this world, there is a setting called something like allow cross-domain access deeply hidden in the security tab, which must be set to enable.

Chrome 允许使用命令行参数跨域调用：

Chrome allows cross-domain calls with a commandline argument:

chrome.exe --disable-web-security

这篇关于jQuery跨域iframe脚本的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！