Flashgamer

Can you show me how you get the JSON string into flash?

load vars, load xml or via xml webservice

I could find a contact e-mail on your website, is this true?

Sure. Just use LoadVars and the Parse-function like this:

import JSON;

var jsondata:LoadVars = new LoadVars();

jsondata.onLoad = function(success){

	if(success){

		_global.jd = JSON.parse( unescape(this.toString()) );

	} else {

		trace("unable to load JSON data");

	}

}

jsondata.load("http://www.server.com/datasource.php");

If I only had slightly more spare time I'd write a tutorial for Flashmagazine on this...

J

There is just one problem in your implementation. You will never see a + in strings or numbers, since you use unescape().

For Example

{
"plus":"+",
"bigNumber":1.513e+8
}

will both give false results. "plus" will contain a space after parsing, bignumber will fail because "bigNumber" is unescaped to "1.513e 8".

Hi Jens,
That's true. This was the only way around the bug that I could find. By doing this, the class now supports the "e" and "E", but it still does not support the "+" as you say. Feel free to post a solution here if you find one.

J

instead of the onLoad handler:

jsondata.onData = function(str:String) {
try {
_global.jd = JSON.parse(str);
} catch (ex) {
trace("ERROR parsing JSON string:\n" + ex.name + ": " + ex.message + ": " + ex.at + ": " + ex.text);
}
};

Good point Jens! (Better AS2-style catching of errors)

lemme show you how i've done this.
This combines the onLoad handler that will let u know if you can't load the json AND a parse function that will nicely throw lower level exceptions if the json is malformed.
Dont forget to use
import JSON
in your actionscript, after saving the json class as a separate .as file (and don't forget to CAPITALIZE the file name as in JSON.as).
get the JSON.as contents here:
http://json.org/json.as

Anyway, the c0de2:

import JSON

//jsonStr = "{\"tit\": 12, \"foo\": \"bar\"}"

var jsondata:LoadVars = new LoadVars();

jsondata.onLoad = function(success){

if(success){

parsing( unescape(this.toString()) );

} else {

trace("unable to load JSON data");

}

}

jsondata.load("http://misha.local:8888/video/find_preview_profile/");

function parsing(jsonStr) {

var json = new JSON();
try {
var o:Object = json.parse(jsonStr);
var s:String = json.stringify(obj);

trace(o.fuck);
} catch(ex) {
trace(ex.name + ":" + ex.message + ":" + ex.at + ":" + ex.text);
}
}

Everytime i use this:

import JSON;

var jsondata:LoadVars = new LoadVars();

jsondata.onLoad = function(success){

if(success){

_global.jd = JSON.parse( unescape(this.toString()) );

} else {

trace("unable to load JSON data");

}

}

jsondata.load("http://www.server.com/datasource.php");

i get an error as follows:

**Error** Scene=Scene 1, layer=Layer 1, frame=1:Line 44: The property being referenced does not have the static attribute.
_global.jd = JSON.parse( unescape(this.toString()) );

I get this with every tutorial i try using JSON. Can you advise?

Hi Anonymous,
From the looks of that error message, it seems that you have done some changes to your class that causes this error, so it's not JSON that is the problem. Static classes and variables have to follow certain rules and it looks like you are breaking one of them? I can't tell which from the code you sent.

J

oh com' on!!!
**
JSON.parse( unescape(this.toString()) );
**
call is assuming that the class JSON has a static function called "parse"

try this:
import JSON;
var jo:JSON = new JSON()
jo.parse(unescape(String));

but then consider the scope where you are calling it...

Ooops. Narunas is right. I should have spotted that. Must not answer comments just before I go to bed...

J

Just noticed in Michael's code up top that there is a minor mistake:

var o:Object = json.parse(jsonStr);
var s:String = json.stringify(obj);

should be:

var o:Object = json.parse(jsonStr);
var s:String = json.stringify(o);

need to change the "obj" to "o"

Cheers for the code!!