JSON errors on ActionScript3

Question

I have this code for a mock up mobile app on Flash:

package  
{

import flash.display.Sprite;
import flash.events.MouseEvent;
import flash.events.*;
import flash.net.*;
import com.adobe.serialization.json.*;

public class ScreenCategories extends Sprite 
{

    private var lastButtonEndedY:int;
    private var categories:Array;
    private var dataUrl:String = "getCategories.php";

    // Change this to false to use local static data instead;
    private var useRemoteData:Boolean = true;

    // Constructor: Create an array of three categories
    public function ScreenCategories()
    {
        lastButtonEndedY = 35;

        if ( useRemoteData )
        {
            loadCategories();
        }
    }

    public function loadCategories():void
     {
        var request:URLRequest = new URLRequest(dataUrl);
        var loader:URLLoader = new URLLoader();
        loader.dataFormat = URLLoaderDataFormat.TEXT;
        loader.addEventListener(Event.COMPLETE, categoryLoad_complete);
        loader.load(request);
     }

     private function categoryLoad_complete(evt:Event):void
     {
        var jsonText:String = evt.target.data;

        //Deserialize JSON
        categories = JSON.decode(jsonText) as Array;   
    }

    private function initializeCategory():void
    {
        // for each "category" in our list (Array)...
        for (var count in categories)
        {
            // Create a button for each of the categories that exist in our Array
            var aCategory:BtnCategory = new BtnCategory(categories[count].category);

            // Add the BtnCategory to the stage
            aCategory.x = 0;
            aCategory.y = lastButtonEndedY;
            aCategory.name = categories[count].id; // give it a unique name!
            addChild(aCategory);

            lastButtonEndedY += (aCategory.getHeight() + 1);
        }

        addEventListener(MouseEvent.CLICK, mouseClicked);
    }

    public function mouseClicked(e:MouseEvent)
    {
        removeEventListener(MouseEvent.CLICK, mouseClicked);

        // trace the name of the button that was pressed, in this case - the category number!
        var btnPressed:int = parseInt(e.target.name);

        // if the category exists in the Array (ie. not undefined), then display that category!
        if (categories[btnPressed] != undefined)
        {
            displayCategory(btnPressed)
        }

        addEventListener(MouseEvent.CLICK, mouseClicked);
    }

    // We want to go forward to see the list of products in this category, call back to Main.as so make that happen.
    public function displayCategory(categoryId)
    {
        trace ("display product category:" + categoryId);
        var par:* = parent;
        par.displayCategory(categoryId);
    }

}

}

But I get the following errors:

**JSONParseError: Unexpected < encountered
    at com.adobe.serialization.json::JSONTokenizer/parseError()[/Users/rominamora/Documents/AOD/term 3/interactive design/assignment3/com/adobe/serialization/json/JSONTokenizer.as:704]
    at com.adobe.serialization.json::JSONTokenizer/getNextToken()[/Users/rominamora/Documents/AOD/term 3/interactive design/assignment3/com/adobe/serialization/json/JSONTokenizer.as:206]
    at com.adobe.serialization.json::JSONDecoder/nextToken()[/Users/rominamora/Documents/AOD/term 3/interactive design/assignment3/com/adobe/serialization/json/JSONDecoder.as:102]
    at com.adobe.serialization.json::JSONDecoder()[/Users/rominamora/Documents/AOD/term 3/interactive design/assignment3/com/adobe/serialization/json/JSONDecoder.as:71]
    at com.adobe.serialization.json::JSON$/decode()[/Users/rominamora/Documents/AOD/term 3/interactive design/assignment3/com/adobe/serialization/json/JSON.as:95]
    at ScreenCategories/categoryLoad_complete()[/Users/rominamora/Documents/AOD/term 3/interactive design/assignment3/ScreenCategories.as:45]
    at flash.events::EventDispatcher/dispatchEventFunction()
    at flash.events::EventDispatcher/dispatchEvent()
    at flash.net::URLLoader/onComplete()**

biril · Accepted Answer · 2012-07-11 21:52:53Z

1

You probably receive invalid JSON from getCategories.php.

Try running the getCategories.php script in a browser (by pasting the (full) URL in the address bar) and copying the JSON you get into the jsonlint validator. This should give you a heads up about anything invalid.

For a definition of valid JSON check out json.org

edited Jul 11, 2012 at 21:52

answered Jul 11, 2012 at 21:45

biril

1,9951 gold badge19 silver badges30 bronze badges

Sign up to request clarification or add additional context in comments.

9 Comments

Romina Mora Over a year ago

but when i run my JSON on the web it works well, i get the errors when i try to run the swf

biril Over a year ago

@RominaMora Exactly what do you mean "run my JSON on the web"?

biril Over a year ago

@RominaMora The script may work, it may run perfectly, but that doesn't mean that the JSON it outputs is valid. You have to take extra care that the produced JSON is valid before passing it on to some parser.

Romina Mora Over a year ago

i think my code i posted first has some errors when calling the JSON its a .as file for the Categories' Screen of the "app"

Romina Mora Over a year ago

you are right i used the jsonlint and it's not valid my code for the JSON is

<?php     // Make a MySQL Connection mysql_connect("localhost", "jmora", "hh5v7") or die(mysql_error()); mysql_select_db("jmora") or die(mysql_error());  // Retrieve the data from the "products" table $result = mysql_query("SELECT prodid, MexCandy.categoryid, prodname, prodrating, price, proddescription, prodpic 			    	   FROM MexCandy") or die(mysql_error());  // store all the records of the "products" table while($products = mysql_fetch_array( $result, MYSQL_ASSOC)) {   echo json_encode($products); }  ?>

|

Collectives™ on Stack Overflow

JSON errors on ActionScript3

1 Answer 1

9 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

9 Comments

Your Answer

Sign up or log in

Post as a guest

Related