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json parser patch

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sebastianconcept@gmail.co

Sep 12, 2011; 5:04pm

json parser patch

840 posts

Maybe this is useful to someone:

Try this:

JSJsonParser parseStream: '{lhs: "1 Brazil real",rhs: "0.592768 U.S. dollars",error: "",icc: true}' readStream

it can't parse that, so..

...patch it with this:

JSJsonParser#parseProperty

| name value |

name := self parsePropertyName.

value := self parseValue.

^ self createProperty: name with: value.

JSJsonParser#parsePropertyName

| result |

result := WriteStream on: String new.

[ stream atEnd or: [ stream peek = $: ] ]

whileFalse: [ result nextPut: self parseCharacter ].

^ self expect: ':'; createString: result contents

then you get it working like this:

a Dictionary('error'->'' 'icc'->true 'lhs'->'1 Brazil real' 'rhs'->'0.592768 U.S. dollars' )

sebastian

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Lukas Renggli

Sep 12, 2011; 5:07pm

Re: json parser patch

5207 posts

The problem is that what you parse is not valid JSON, check the standard on json.org.

Lukas

On Monday, 12 September 2011, Sebastian Sastre <[hidden email]> wrote:
> Maybe this is useful to someone:
> Try this:
> JSJsonParser parseStream: '{lhs: "1 Brazil real",rhs: "0.592768 U.S. dollars",error: "",icc: true}' readStream
> it can't parse that, so..
> ...patch it with this:
> JSJsonParser#parseProperty
> | name value |
> name := self parsePropertyName.
> value := self parseValue.
> ^ self createProperty: name with: value.
> JSJsonParser#parsePropertyName
> | result |
> result := WriteStream on: String new.
> [ stream atEnd or: [ stream peek = $: ] ]
> whileFalse: [ result nextPut: self parseCharacter ].
> ^ self expect: ':'; createString: result contents
> then you get it working like this:
> a Dictionary('error'->'' 'icc'->true 'lhs'->'1 Brazil real' 'rhs'->'0.592768 U.S. dollars' )
> sebastian <http://about.me/sebastianconcept>
> o/
>
>
>

--
Lukas Renggli
www.lukas-renggli.ch

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Philippe Marschall

Sep 12, 2011; 5:28pm

Re: json parser patch

2989 posts

In reply to this post by sebastianconcept@gmail.co

2011/9/12 Sebastian Sastre <[hidden email]>:
> Maybe this is useful to someone:
> Try this:
> JSJsonParser parseStream: '{lhs: "1 Brazil real",rhs: "0.592768 U.S.
> dollars",error: "",icc: true}' readStream
> it can't parse that, so..

Because it's not JSON. JSON keys need to be quoted [1]

[1] http://json.org/

Cheers
Philippe
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sebastianconcept@gmail.co

Sep 12, 2011; 5:46pm

Re: json parser patch

840 posts

Lukas, Phillipe,

sure?

I see it says:

"...A value can be a string in double quotes, or a number, or true or false or null, or an object or an array..."

which translates to:

1. A value, like when value means something different than a key

2. can, like when can means something more flexible than a has to

I am missing something?

sebastian

On Sep 12, 2011, at 2:28 PM, Philippe Marschall wrote:

2011/9/12 Sebastian Sastre <[hidden email]>:
Maybe this is useful to someone:
Try this:
JSJsonParser parseStream: '{lhs: "1 Brazil real",rhs: "0.592768 U.S.
dollars",error: "",icc: true}' readStream
it can't parse that, so..

Because it's not JSON. JSON keys need to be quoted [1]

[1] http://json.org/

Cheers
Philippe
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... [show rest of quote]

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Boris Popov, DeepCove Labs (SNN)

Sep 12, 2011; 5:54pm

RE: json parser patch

2052 posts

In JSON keys in an object can only be strings, but your example has no quotes around them, thus, it’s not valid JSON. Instead, try,

JSJsonParser parse: '{"lhs": "1 Brazil real","rhs": "0.592768 U.S. dollars","error": "","icc": true}'

Dictionary ('error' -> '' 'lhs' -> '1 Brazil real' 'rhs' -> '0.592768 U.S. dollars' 'icc' -> true)

HTH,

-Boris

From: [hidden email] [mailto:[hidden email]] On Behalf Of Sebastian Sastre
Sent: Monday, September 12, 2011 1:47 PM
To: Seaside - general discussion
Subject: Re: [Seaside] json parser patch

Lukas, Phillipe,

sure?

I see it says:

"...A value can be a string in double quotes, or a number, or true or false or null, or an object or an array..."

which translates to:

1. A value, like when value means something different than a key

2. can, like when can means something more flexible than a has to

I am missing something?

sebastian

On Sep 12, 2011, at 2:28 PM, Philippe Marschall wrote:

2011/9/12 Sebastian Sastre <[hidden email]>:

Maybe this is useful to someone:

Try this:

JSJsonParser parseStream: '{lhs: "1 Brazil real",rhs: "0.592768 U.S.

dollars",error: "",icc: true}' readStream

it can't parse that, so..

Because it's not JSON. JSON keys need to be quoted [1]

[1] http://json.org/

Cheers
Philippe
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sebastianconcept@gmail.co

Sep 12, 2011; 5:56pm

Re: json parser patch

840 posts

In reply to this post by sebastianconcept@gmail.co

ok, it seems it actually needs double quotes:

http://json.org/example.html

funny thing... I'm seeing "invalid" json being used all around

not to mention that the source I've shown, came from Google itself

Hmmm

sebastian

On Sep 12, 2011, at 2:46 PM, Sebastian Sastre wrote:

Lukas, Phillipe,

sure?

I see it says:
"...A value can be a string in double quotes, or a number, or true or false or null, or an object or an array..."

which translates to:
1. A value, like when value means something different than a key
2. can, like when can means something more flexible than a has to

I am missing something?

sebastian

o/

On Sep 12, 2011, at 2:28 PM, Philippe Marschall wrote:

2011/9/12 Sebastian Sastre <[hidden email]>:
Maybe this is useful to someone:
Try this:
JSJsonParser parseStream: '{lhs: "1 Brazil real",rhs: "0.592768 U.S.
dollars",error: "",icc: true}' readStream
it can't parse that, so..

Because it's not JSON. JSON keys need to be quoted [1]

[1] http://json.org/

Cheers
Philippe
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... [show rest of quote]

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... [show rest of quote]

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Boris Popov, DeepCove Labs (SNN)

Sep 12, 2011; 6:00pm

RE: json parser patch

2052 posts

Sebastian,

You must be confusing JavaScript with JSON, where the latter is only a subset of the former to serve as a data-interchange format.

http://seattlesoftware.wordpress.com/2008/01/08/javascript-vs-json/

HTH,

-Boris

From: [hidden email] [mailto:[hidden email]] On Behalf Of Sebastian Sastre
Sent: Monday, September 12, 2011 1:57 PM
To: Seaside - general discussion
Subject: Re: [Seaside] json parser patch

ok, it seems it actually needs double quotes:

http://json.org/example.html

funny thing... I'm seeing "invalid" json being used all around

not to mention that the source I've shown, came from Google itself

Hmmm

sebastian

On Sep 12, 2011, at 2:46 PM, Sebastian Sastre wrote:

Lukas, Phillipe,

sure?

I see it says:

"...A value can be a string in double quotes, or a number, or true or false or null, or an object or an array..."

which translates to: