Re^11: perl dancer route template hashref pass complex json file to server issue (the reverse)


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Re^11: perl dancer route template hashref pass complex json file to server issue (the reverse)

by RamiD (Acolyte)

on Jul 30, 2016 at 10:07 UTC ( [id://1168855]=note: print w/replies, xml )

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in reply to Re^10: perl dancer route template hashref pass complex json file to server issue (the reverse)
in thread perl dancer route template hashref pass complex json file to server issue

thanks , the following worked with me

<!DOCTYPE html>
<html>
<head>
        
</head>
<body>

<div style = "padding: 100px 100px 10px;">
   <script>
           var test2=<%passtoserver | replace('"', '"') %>;
           var test3=JSON.stringify(test2);
          alert(test3);
   </script>
  <button type="text" >
</div>

</body>
</html>
[download]

without any change in client side, Rami D.

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Re^12: perl dancer route template hashref pass complex json file to server issue (')
by tye (Sage) on Jul 30, 2016 at 19:19 UTC

I suspect that your working code does not exactly match the code that you posted above. Trying to guess some things, I encourage you to test your code against a JSON value that contains strings containing a single quote / apostrophe character, a literal backslash character, even a newline character.

Update: Oh, much later I realized how the code you posted could actually work. Valid JSON strings are also valid JavaScript source code. This might well open up a vector for doing cross-site JavaScript injection attacks, though that is likely true using your old 'eval' approach as well.

- tye

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