Flex3 Corelib JSON issues

[alexr]

I am testing webscripts (JSON) on Alfresco Community 2.1

I downloaded the ascorelib3 corelib90 (containing JSON funcionality) from http://code.google.com/p/as3corelib/ and configured it for Flexbuilder 3. However
for some reason this corelib doesn't seem to work with Flex3?
Does anybody have a corelib.swc compatible with flexbuilder3 that I can use to test my Alfresco JSON webscripts against and any tips on how
to make this work.

The following JSONExample application:

<?xml version="1.0" encoding="utf-8"?>

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<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" xmlns="*"
   layout="absolute"
   creationComplete="service.send()">
   
   <mxcript>
      <![CDATA[
         import mx.collections.ArrayCollection;
         import mx.rpc.events.ResultEvent;
         import com.adobe.serialization.json.JSON;
         
         private function onJSONLoad(event:ResultEvent):void
         {
            var rawDatatring = String(event.result);
            var arr:Array = (JSON.decode(rawData) as Array);
            
            var dp:ArrayCollection = new ArrayCollection(arr);
            
            grid.dataProvider = dp;
            
         }
      ]]>
   </mxcript>
   
   <mx:HTTPService
      id="service"
      resultFormat="text"
      url="http://weblogs.macromedia.com/mesh/mashedpotato.json"
      result="onJSONLoad(event)" />
   
   <mxataGrid id="grid" right="10" left="10" top="10" bottom="10">
      <mx:columns>
         <mxataGridColumn headerText="Service" dataField="src"/>
         <mxataGridColumn headerText="Title" dataField="title"/>
      </mx:columns>
   </mxataGrid>
   
</mx:Application>



=============================================================

Throws the following errors:

Error: Unexpected < encountered
   at com.adobe.serialization.json::JSONTokenizer/parseError()[C:\Documents and Settings\mchamber\My Documents\src\flashplatform\projects\corelib\trunk\src\actionscript3\com\adobe\serialization\json\JSONTokenizer.as:492]
   at com.adobe.serialization.json::JSONTokenizer/getNextToken()[C:\Documents and Settings\mchamber\My Documents\src\flashplatform\projects\corelib\trunk\src\actionscript3\com\adobe\serialization\json\JSONTokenizer.as:171]
   at com.adobe.serialization.json::JSONDecoder/nextToken()[C:\Documents and Settings\mchamber\My Documents\src\flashplatform\projects\corelib\trunk\src\actionscript3\com\adobe\serialization\json\JSONDecoder.as:88]
   at com.adobe.serialization.json::JSONDecoder()[C:\Documents and Settings\mchamber\My Documents\src\flashplatform\projects\corelib\trunk\src\actionscript3\com\adobe\serialization\json\JSONDecoder.as:63]
   at com.adobe.serialization.json::JSON$/decode()[C:\Documents and Settings\mchamber\My Documents\src\flashplatform\projects\corelib\trunk\src\actionscript3\com\adobe\serialization\json\JSON.as:81]
   at JSONExample/onJSONLoad()[C:\Documents and Settings\Administrator\My Documents\Flex Builder 3\JSONExample\src\JSONExample.mxml:51]
   at JSONExample/__service_result()[C:\Documents and Settings\Administrator\My Documents\Flex Builder 3\JSONExample\src\JSONExample.mxml:65]
   at flash.events::EventDispatcher/dispatchEventFunction()
   at flash.events::EventDispatcher/dispatchEvent()
   at mx.rpc.http.mxml::HTTPService/http://www.adobe.com/2006/flex/mx/internal::dispatchRpcEvent()[E:\dev\3.0.x\frameworks\projects\rpc\src\mx\rpc\http\mxml\HTTPService.as:275]
   at mx.rpc::AbstractInvoker/http://www.adobe.com/2006/flex/mx/internal::resultHandler()[E:\dev\3.0.x\frameworks\projects\rpc\src\mx\rpc\AbstractInvoker.as:191]
   at mx.rpc::Responder/result()[E:\dev\3.0.x\frameworks\projects\rpc\src\mx\rpc\Responder.as:41]
   at mx.rpc::AsyncRequest/acknowledge()[E:\dev\3.0.x\frameworks\projects\rpc\src\mx\rpc\AsyncRequest.as:74]
   at DirectHTTPMessageResponder/completeHandler()[E:\dev\3.0.x\frameworks\projects\rpc\src\mx\messaging\channels\DirectHTTPChannel.as:381]
   at flash.events::EventDispatcher/dispatchEventFunction()
   at flash.events::EventDispatcher/dispatchEvent()
   at flash.net::URLLoader/onComplete()




=============================================================
Kind Regards,

Alex

[stevereiner]

If you want to use Flex with Alfresco, you should start with the the small flex framework from the alfresco SVN  ( head/root/modules/flex-sdk/framework) to provide login/logout/webscript infrastructure, and ACE  ( head/root/modules/ace ) to provide an example of login/logout/search using the framework. Thats how I started. 

I am pretty far along with both a Flex based Alfresco client and a Flex+AIR Alfresco client.  I am using Flex 3.0, AIR 1.0, and the latest Alfresco 2.9.0C_dev via javascript webscripts.  From google code: I didn't use corelib, I did use flexlib for tabs.

The alfresco flex-sdk works fine for the object result format of the flex mx.rpc.http.HTTPService. I had to change org.alfresco.framework.service.webscript.WebScriptService.as to work with the e4x result format of mx.rpc.http.HTTPService.

Steve Reiner

http://www.integratedsemantics.com

[stevereiner]

On as3corelib to decode JSON with text format from flex HTTPService
1. Noticed problem parsing "<" in the error stack
2. latest build (.90) of as3corelib is old (March 19, 2007)
3. you could try slightly newer code (last change may 27, 2007) in src/com/adobe/serialization/json/*.* via
http://code.google.com/p/as3corelib/source/browse
or svn checkout http://as3corelib.googlecode.com/svn/trunk/ as3corelib-read-only
4. noticed some json encode/decode issues at http://code.google.com/p/as3corelib/issues/list

P.S.
if using alfresco flex-sdk with HTTPService with non object result format, a quick workaround in
src/org/alfresco/framework/service/webscript/WebScriptService.as  onResultEvent() is to change
from:   if (event.result.response != null &&
to:       if (this.resultFormat == "object" && 
               event.result.response != null &&
(more changes would be needed to have status code checking for other formats)

New: Forgot to mention that in each of my ActionScript service classes set  webScript.resultFormat ="e4x";   (where webScript is instance of org.alfresco.framework.service.webscript.WebScriptService, WebScriptService extends  flex HTTPService)

Steve

[alexr]

Thank you Steve,

The webservice URL i tested was broken (server down). I tested another json webservice (Yahoo) and my mxml application worked. So Flexbuilder
and the corelib seems to be configured ok.
I have however posted a new question about json and the folder.get webscript in this forum branch.

Kind regards,

Alex