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POWhy does caja sanitization of Google Apps Script htmloutput fail on particular strings
 

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  1. POWhy does caja sanitization of Google Apps Script htmloutput fail on particular strings
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    <p>I am trying to prepare GAS code samples for embedding in Google Sites and other web sites. I use the HtmlService.createHtmlOutput and HtmlService.createTemplateFromFile() and template.evaluate().getContent() to serve up an html version of the content of a google apps script. That all works fine as per <a href="http://excelramblings.blogspot.co.uk/2012/11/publishing-google-apps-script-code.html" rel="nofollow">this post</a>.</p> <p>Now I would like to prettify the code using prettyify.js. Im using the version <a href="http://code.google.com/p/google-caja/source/browse/doc/cajajs/prettify/?r=4554" rel="nofollow">embedded in caja</a> and it almost works. However particular method names in the code being prettified throw an error from htmlservice.</p> <blockquote> <p>Untaming of guest constructed objects objects unsupported. Expect a function not a string : pln</p> </blockquote> <p>Specifically, this text is successfully prettified, </p> <pre><code>function xisItHtml (e) { return ( e.parameter.hasOwnPropertu('template')) ; } </code></pre> <p>whereas this throws an error</p> <pre><code>function xisItHtml (e) { return ( e.parameter.hasOwnProperty('template')) ; } </code></pre> <p>It seems that specific methods (strange because none of this code is being executed, just prettified), cause caja sanitation to complain.</p> <p>The code in the template is just this</p> <pre><code>$(document).ready(function () { // any jQueryness can happen here... try { prettyPrint(); } catch(err) { alert("failed prettification " + err); } }); </code></pre> <p>I'm pretty much stumped. any ideas?</p>
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    1. COboth the working example and the one throwing an error look identical
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    2. COThe one that works has the hasOwnProperty spelt wrongly. If you spell it correctly it fails. Might be some checking for code being injected into html body?
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      1. USbruce
    3. COMartin. If you copy your caja example into GAS html template and execute it, Example 1 works. The other 2 don't.
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      1. USbruce
 

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