[Seaside] How to escape single quotes in generated JSON?

Sven Van Caekenberghe sven at stfx.eu
Tue Feb 23 17:34:47 UTC 2016

Hi Mariano,

I am not sure what your specific problem is, but strings in JSON are delimited with double quotes and only double quotes should be escaped, not single quotes.


NeoJSONWriter toString: { 'exception' -> 'a  ''escape this'' aa' } asDictionary.

 "'{""exception"":""a  ''escape this'' aa""}'"

STON uses single quoted strings (like Smalltalk), hence escapes them.

STON toString: { 'exception' -> 'a  ''escape this'' aa' } asDictionary.
 "'{''exception'':''a  \''escape this\'' aa''}'"

Note the confusing escaping done by Smalltalk, better inspect the results !!

This won't solve your problem though, I know.


> On 23 Feb 2016, at 17:37, Mariano Martinez Peck <marianopeck at gmail.com> wrote:
> Hi guys, 
> I am trying to serialize a dictionary form Smalltalk with either NeoJSON or with Seaside's #asJson. Imagine something like this:
> | infoDict stream | 
> stream := String new writeStream.
>   infoDict := Dictionary new.
>   infoDict at: 'exception' put: 'a  ''escape this'' aa'.
> Note that the string of 'exception' may contain single quotes inside. 
> Then, at some point I do:
> self requestContext responseGenerator response nextPutAll: (infoDict asJson).
> Problem is the string arrives without any escaping so....when I try to do this at client side from that string:
> jQuery.parseJSON(variableContainingThatString);
> I get an error as single quotes inside the double quotes do not seem allowed. 
> I tried a lot of combinations of "JSON.stringify" or things like:
> variableContainingThatString.replace(/[\\"'']/g, ''\\$&'').replace(/\u0000/g, ''\\0''); 
> but none work...
> So..I wonder...can I simply escape this from server side at the time I serialize to JSON? Any special way of doing this or I hack on the resulting string? 
> Thanks in advance, 
> -- 
> Mariano
> http://marianopeck.wordpress.com
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