Flex app calling CF cfc to download file gets "Channel disconnected" fault

forums_noreply@adobe.com — Mon, 03 Oct 2011 11:37:09 GMT

I am a newbie with ColdFusion and Flex. I am trying to implement file download/streaming functionality in my Flex 4.5 application and I am running ColdFusion 9 as my back end. More specifically, I have a component in my Flex app that displays a list of files - some of these files can be available for opening (or "previewing") via the client. I want the client to be able to click a button and download the file from the ColdFusion server, after the appropriate security checks are performed (also in ColdFusion). Right now I am just trying to get the basic download functionality to work with a very simple cfc. Here is the cfc code:

<cfcomponent displayname="Preview Document"

output="false">

</cffunction>

</cfcomponent>

When I try this via a cfm, it works fine (I get a File Download window where I can choose to either open or save the file). But when I try to use this in my Flex app, I get an error.

In my Flex app, I have a RemoteObject to access my cfc and a CallResponder:

<s:RemoteObject id="PreviewDocument"
   source="PreviewDocument"
   destination="ColdFusion"
   showBusyCursor="true"/>

<s:CallResponder id="PreviewDocumentResult"
    fault="Alert.show('CallResponder PreviewDocumentResult: ' +
    event.fault.faultString + '\n' + event.fault.faultDetail)"
    result="PreviewDocumentResult_resultHandler(event)"/>

Then I created a button whose click even executes the following line:

PreviewDocumentResult.token = PreviewDocument.streamFile(

"myfile.pdf");

When I run my app, I get the following fault:

faultCode = "Client.Error.DeliveryInDoubt"

faultString = "Channel disconnected"

faultDetail = "Channel disconnected before an acknowledgement was received"

I have tried many different approaches and searched online for help with this fault, but I could not find any helpful clue to where I can start investigating this.

Can anyone help with why I am getting this fault?

Thanks in advance.

Event trouble - dispatching an event from the main app?

forums_noreply@adobe.com — Tue, 23 Aug 2011 13:21:32 GMT

I am new to Flex and recently I am trying to use custom events. Currently I have a custom component that dispatches a custom event when the user clicks a button. That event is being caught and handled in the main app file. That is working fine.

Part of this event handling consists of requesting data from a remote server. When the data is returned, I instantiate an object to store it. What I want to do is to pass this object back to the custom component via a custom event that would be dispatched from the main app. Is that possible at all?

I am dispatching the custom event but it is not being caught in the custom component, even though I added a listener there via addEventListener (and I create the listening function too).

The reason I want to use an event, and not data binding is because I want to be able to do some manipulation/formatting of the data in the object *within the custom component* BEFORE it gets displayed. I don't want to do this manipulation in the main app because it might have to be closely coupled with visual elements in the custom component, and I am trying to keep the business logic separated from the visual and the data (MVC model).

Any ideas?

Thanks in advance.

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Flex app calling CF cfc to download file gets "Channel disconnected" fault

Event trouble - dispatching an event from the main app?