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POHow can I bypass the same-origin policy of an iframe for Chrome extensions?
 

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  1. POHow can I bypass the same-origin policy of an iframe for Chrome extensions?
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    <blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/11325415/access-iframe-content-from-a-chromes-extension-content-script">access iframe content from a chrome&#39;s extension content script</a> </p> </blockquote> <p>I'm trying to manipulate part of an iframe on a webpage via a Chrome extension.</p> <p>Everytime I do, I get a "Unsafe JavaScript attempt to access frame with URL" error. <a href="http://developer.chrome.com/extensions/xhr.html#requesting-permission" rel="nofollow noreferrer">Reading the Chrome extension documentation, it appears I should be able to ask for permissions</a> to do this in my manifest.json. But nothing I've done seems to allow me to do this.</p> <p>My manifest.json:</p> <pre><code>{ "name": "Manipulate an iframe", "description": "Test to manipulate an iframe", "version": "1.0", "background": { "scripts": ["background.js"] }, "permissions": [ "tabs", "http://*/", "https://*/", "&lt;all_urls&gt;" ], "browser_action": { "name": "Modify iframe", "icons": ["icon.png"] }, "manifest_version": 2 } </code></pre> <p>My background.js:</p> <pre><code>chrome.browserAction.onClicked.addListener(function(tab) { chrome.tabs.executeScript(null, { allFrames:true, runAt:"document_end", file: "jquery-latest.min.js" }, function() { chrome.tabs.executeScript(null, { allFrames:true, runAt:"document_end", file: "content-script.js" }); }); }); </code></pre> <p>My content-script.js:</p> <pre><code>$('.container').css('width','98%'); $('#myPage iframe').contents().find('#code').unwrap() </code></pre> <p>The container is resized correctly when I click the extension button, but I can't touch the iframe. It seems to me that I've given all the permissions I can, so is there somewhere else I need to specify permissions?</p> <p>Edit :</p> <p>I found this answer to be helpful in understanding the different types of scripts in a Chrome extension: <a href="https://stackoverflow.com/a/9916089/1698152">https://stackoverflow.com/a/9916089/1698152</a></p> <p>The flagged duplicate answer: <a href="https://stackoverflow.com/questions/11325415/access-iframe-content-from-a-chromes-extension-content-script">access iframe content from a chrome&#39;s extension content script</a> was sufficient to answer my question.</p> <p>Instead of trying to inject into all frames via tabs.executeScript, I injected content scripts into all frames by defining them in the manifest. I was then able to call functions in these scripts from the background page script via message passing.</p> <p>I still don't understand why this is any different from what I was already doing, however.</p>
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    1. COThose permissions give you the ability to make cross domain ajax requests. I do not believe that it gives you cross frame scripting permissions. The iframe must be serving content on the same domain as your page. https://developer.mozilla.org/en-US/docs/HTML/Element/iframe#Scripting
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    2. CO@Adam Surely I am able to do this somehow. Perhaps I should be trying to do this through the Chrome API instead?
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