Why does my RSS Reader is buggy for some RSS ?

[1somniac]

Hi,


I am trying build an RSS reader from an adobe tutorial . This reader can read the RSS given by adobe works as example, but most of the RSS doesn't and I don't know why.

Here is the code in my Main file

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
	 <mx:Script>
<![CDATA[
      
import mx.collections.ArrayCollection;
import mx.rpc.events.ResultEvent;
         
[Bindable] private var rssFeedData:ArrayCollection;
private function rssHandler(event:ResultEvent):void
{
  rssFeedData = event.result.RDF.item;
}
]]>
</mx:Script>
<mx:HTTPService id="RssService" url="http://weblogs.macromedia.com/mxna/xml/rss.cfm?query=byMostRecent" 
result="rssHandler(event)"/>
 
 
<!--For displaying data -->

	 <mx:TabNavigator 
   id="ContentNavigator"
   width="860" height="540" 
   x="10" y="10" paddingTop="5" paddingRight="5" paddingBottom="5" paddingLeft="5">
   
   <mx:VBox label="Articles" 
      width="100%" height="100%"
      verticalGap="0" paddingTop="10" paddingRight="10" paddingBottom="10" paddingLeft="10">
      <mx:Box width="100%" height="33" 
         backgroundColor="#B8AF9C" cornerRadius="15" paddingBottom="5" paddingLeft="10" paddingRight="5" paddingTop="5">
         <mx:Button label="Fetch RSS" click="RssService.send();RssLoader.height=30"/>
      </mx:Box>
      <mx:Box id="RssLoader" 
         width="100%" height="0" 
         backgroundColor="#B8AF9C" paddingTop="6" paddingRight="10" paddingBottom="5" paddingLeft="10">
         <mx:ProgressBar id="rssProgress" 
            indeterminate="true" 
            barColor="#B8AF9C"
            width="100%" 
            labelPlacement="center" 
            label="loading feed"/>
      </mx:Box>               
      <mx:TileList id="FeedDisplay"
         width="100%" height="100%"
         maxColumns="1"
         rowHeight="120" columnWidth="810"
         itemRenderer="ItemRenderer"
         dataProvider="{rssFeedData}"/>
   </mx:VBox>
   
 </mx:TabNavigator>
</mx:Application>

Here is the ItemRenderer file :

<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" horizontalScrollPolicy="off" verticalScrollPolicy="off">
	   <mx:DateFormatter id="dateFormatter" formatString="D-MMM-YY"/>
   
   <mx:Text id="Title" 
      htmlText="{data.title}" 
      x="5" y="0" 
      fontSize="11" selectable="false"
      width="780"
      textAlign="left" fontWeight="bold"/>
   
   <mx:Text id="PublishDate"
      text="{dateFormatter.format(data.date)}"
      x="5" y="{Title.height+3}" 
      fontSize="9" selectable="false"
      width="200"
      textAlign="left" 
      fontWeight="bold"/>         
   
   <mx:Text id="Author"
      text="{data.creator}"
      x="68" y="{Title.height+3}" 
      fontSize="9" selectable="false"
      width="200"
      textAlign="left" fontWeight="bold"/>
      
   <mx:LinkButton id="ReadArticle"
      label="> read article"
      x="700" y="{Title.height-3}"
      fontSize="10"
      rollOverColor="#B8AF9C"
      selectionColor="#595341"
      textRollOverColor="#FFFFFF"
      textSelectedColor="#FFFFFF"/>   
      
   <mx:Text id="Description"
      htmlText="{data.description}"
      x="5" y="{Title.height+20}" 
      fontSize="10" selectable="false"
      width="780"
      textAlign="left"/>
      
   <mx:HRule x="0" y="115" width="100%"/>
</mx:Canvas>

I have this error message :

TypeError: Error #1010: A term is undefined and has no properties.

the error is located in this function :

[Bindable] private var rssFeedData:ArrayCollection;
private function rssHandler(event:ResultEvent):void
{
  rssFeedData = event.result.RDF.item;
}

Why would a term being undefined for some RSS data and not for other ?
Does any of you have an idea to handle it ?

thank you

[dr_zeus]

There are several versions of RSS out there. If you want a more general solution, I recommend using the open source AS3 Syndication Library.

[1somniac]

I also tried this library, I tried an example of the use of the library given here :
http://orangeflash.eu/?p=18

But there is still the same problem.


In any RSS example I tried, i'm facing the same bug : the RSS can't be read.

Here is another Flash RSS reader link :http://thewarp.org/flex/blogreader.html


If I put any other RSS link than the given one, it result in an error.

It's maybe bug from my computer?

[dr_zeus]

Do the sites from which you're trying to load RSS have crossdomain.xml?

[1somniac]

I have just take some documentation on crossdomain.xml, and i have just read that it need a server-side proxy method in order to run the file.

The trouble is that i am developping with Adobe Air, which mean that I can't use a server side langage for uploading file.


Any help ??


thank you

[dr_zeus]

If you're using AIR, then you don't need to worry about crossdomain.xml. That only applies to browser-based applications.

[1somniac]

thank you for your answer!

But I would like to make my RSS reader work. What could I do ?