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A comment on A spreadsheet in fewer than 30 lines of JavaScript, no library used. Parent comment

Re:A spreadsheet in fewer than 30 lines of JavaScript, no li... by aufreak3 on Wednesday November 13, 2013 @06:07PM (#6729314)
Doing this all in a webworker might be one way to get security - by sandboxing the with/eval?
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Re:A spreadsheet in fewer than 30 lines of JavaScript, no li... by jcampbell1 on Wednesday November 13, 2013 @07:06PM (#6729567)
Possibly. Web workers are isolated from the DOM, but can still do stuff like import other scripts or do XHR requests, but those would be limited to the same origin.

It seems like that would be somewhat XSS safe since you are just passing strings back and forth.

I really like this idea.

   evalSafeAsync(code,context,callback)
That being said, for a spreadsheet, you need to bite the bullet and parse the formulas. I don't see an easy way to support SUM(A1:A4) using this eval hack.
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Re:A spreadsheet in fewer than 30 lines of JavaScript, no li... by aboodman on Thursday November 14, 2013 @01:11AM (#6730876)
Script evaluated in a web worker would still have access to your application's cookies and would be able to interact with the server with the user's credentials. You probably don't want that.
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