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How to escape single quotes in generated JSON?

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Mariano Martinez Peck

How to escape single quotes in generated JSON?

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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Sven Van Caekenberghe-2

Re: How to escape single quotes in generated JSON?

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.

https://tools.ietf.org/html/rfc7158#page-8

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.

Sven

> On 23 Feb 2016, at 17:37, Mariano Martinez Peck <[hidden email]> 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
> _______________________________________________
> seaside mailing list
> [hidden email]
> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

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kuszi

form action change to external link?

Hello Everyone!

I'm still working on my large file upload project on a windows server (so ngix won't play :( ).

I have a good uploader and also technique to solve upload outside Seaside (or VA WebCOnnection as I did before) and then come back into the session afterwards.

But to make it I need to hack the seaside form to put my own link into the ACTION=".....".

Here is what I did, but it seems that action is overwritten by Seaside to its usual internal form action (understandably)

f := html form.

f with:[

.... form creaton code here.... works well, no problem.......

].

f action: 'http://localhost/home/html/upload_large.asp'.

And when looking at generated page source:

<form accept-charset="utf-8" method="post" action="/uploader?_s=jdXt_Vzp8dKoK3M9&_k=C197PyH7ka66mXVd">

So, how to hack my own action into the form?

thanks

Robert

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Alejandro Infante

Re: form action change to external link?

Hi!

The WABrush>>with: call must be the last call to a brush. So instead of:

html form

with: [ stuff… ];

action: 'http://localhost/home/html/upload_large.asp'

Try:

html form

action: 'http://localhost/home/html/upload_large.asp';

with: [ stuff… ]

I have tried and it works :)

Cheers!

Alejandro

On Mar 1, 2016, at 11:30 AM, Robert Kuszinger <[hidden email]> wrote:

Hello Everyone!

I'm still working on my large file upload project on a windows server (so ngix won't play :( ).
I have a good uploader and also technique to solve upload outside Seaside (or VA WebCOnnection as I did before) and then come back into the session afterwards.

But to make it I need to hack the seaside form to put my own link into the ACTION=".....".

Here is what I did, but it seems that action is overwritten by Seaside to its usual internal form action (understandably)

f := html form.

f with:[

.... form creaton code here.... works well, no problem.......

].

f action: 'http://localhost/home/html/upload_large.asp'.

And when looking at generated page source:

<form accept-charset="utf-8" method="post" action="/uploader?_s=jdXt_Vzp8dKoK3M9&_k=C197PyH7ka66mXVd">

So, how to hack my own action into the form?

thanks
Robert

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kuszi

Re: form action change to external link?

Thanks!

I'll go like this.

Alejandro Infante <[hidden email]> ezt írta (időpont: 2016. márc. 1., K, 17:22):

Hi!
The WABrush>>with: call must be the last call to a brush. So instead of:

html form
with: [ stuff… ];
action: 'http://localhost/home/html/upload_large.asp'

Try:

html form
action: 'http://localhost/home/html/upload_large.asp';
with: [ stuff… ]

I have tried and it works :)

Cheers!
Alejandro

On Mar 1, 2016, at 11:30 AM, Robert Kuszinger <[hidden email]> wrote:

Hello Everyone!

I'm still working on my large file upload project on a windows server (so ngix won't play :( ).
I have a good uploader and also technique to solve upload outside Seaside (or VA WebCOnnection as I did before) and then come back into the session afterwards.

But to make it I need to hack the seaside form to put my own link into the ACTION=".....".

Here is what I did, but it seems that action is overwritten by Seaside to its usual internal form action (understandably)

f := html form.

f with:[

.... form creaton code here.... works well, no problem.......

].

f action: 'http://localhost/home/html/upload_large.asp'.

And when looking at generated page source:

<form accept-charset="utf-8" method="post" action="/uploader?_s=jdXt_Vzp8dKoK3M9&_k=C197PyH7ka66mXVd">

So, how to hack my own action into the form?

thanks
Robert

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seaside mailing list
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