Roku Developer Program

[armagedon79]

I tried it in new project it showed the following error.Any help will be much appreciated.
Thank you.
BRIGHTSCRIPT: ERROR: ParseJSON: Data is empty: pkg:/source/Utils.brs(18)


Utils.brs:

Sub playDefaultClip(app)        
    sizeRect = app.canvas.GetCanvasRect()  
    app.player.SetDestinationRect(sizeRect) 'fullscreen
    
    contentList = []    
        contentList.Push({
            Stream: { url: "http://qthttp.apple.com.edgesuite.net/1010qwoeiuryfg/sl.m3u8" }
            StreamFormat: "hls"
        })       
    app.player.SetContentList(contentList)    
    app.player.play()
    print "playing!"
End Sub

Function LoadNavigationContent(contentURL)
    jsonAsString = ReadAsciiFile(contentURL)
    [color=#FF0000]content = ParseJSON(jsonAsString)[/color]
    return content     
End Function

app controller:

' Factory method
Function initApp()
   
    player = CreateObject("roVideoPlayer")  
    canvas = createObject("roImageCanvas")               
    port = CreateObject("roMessagePort")
    
    canvas.SetMessagePort(port)   
    canvas.SetRequireAllImagesToDraw(false)
      
    player.SetMessagePort(port)        
    player.SetLoop(false)
    'player.SetPositionNotificationPeriod(5) 
    
    navigationContentURL = "pkg:/json/content.json"
    navContent = LoadNavigationContent(navigationContentURL)
             
    controls = {
      menuControl:initMenuControl(navContent)
      playerControl:initPlayerControl()        
    }
    
    app = {
          
      player:player 
      canvas:canvas      
      port:port
      
      'navContent:navContent    
      controls:controls
     
      paint:paintAll
      handleEvents:loopEvents
                      
      onLeftKey:handleLeftKey                                                           
      onUpKey:handleUpKey            
      onRightKey:handleRightKey                                              
      onDownKey:handleDownKey                
      onExitKey:handleExitKey
      onOkKey:handleOkKey             
                  
    }
   
   return app
   
End Function

Function paintAll()
    m.canvas.AllowUpdates(false)          
    m.canvas.Clear()
     
    m.canvas.SetLayer(0, { Color: "#a6a663", CompositionMode: "Source" })                 
    ' Do, any painting here through the canvas object     
    for each k in m.controls
      m.controls[k].paint(m.canvas) 
    end for    
                                                                                          
    m.canvas.AllowUpdates(true)
    m.canvas.Show()     
 
End function 
       
Function loopEvents()

   while true                                                           
    event = wait(0, m.port)                        
    if (event<> invalid)
        'print "events loop"
        if (event.isRemoteKeyPressed())
            index = event.GetIndex()
            print index               
            if (index = 4) 'Left, pulls out the menu                    
                m.onLeftKey()                                                 
            else if (index = 2) 'Up    
                m.onUpKey()
            else if (index = 5) 'Right,  
                m.onRightKey()                                            
            else if (index = 3) 'Down
                m.onDownKey()                
            else if (index = 6) 'ok, 
                m.onOkKey()                     
            else if (index = 0) 'Exit, exits app, if no control is visible  
                if(m.onExitKey() = 1)                    
                   ExitWhile
                endif   
            endif                               
        endif
    endif           
   end while

End function

'If I had interfaces, this would become 'IUserInput'   
Function handleLeftKey()
  handled = false   
   for each k in m.controls
     handled = m.controls[k].onLeftKey(m)
     if(handled)
       print 'handled!'
       Exit For
     end if        
   end for  
     
end Function                                                
           
Function handleUpKey()     
     
   for each k in m.controls
      m.controls[k].onUpKey(m) 
   end for    
end Function
            
Function handleRightKey()
   for each k in m.controls
      m.controls[k].onRightKey(m) 
   end for      
end Function                                            
    
Function handleDownKey() 
   for each k in m.controls
      m.controls[k].onDownKey(m) 
   end for   
end Function                

Function handleExitKey() 
   for each k in m.controls
      m.controls[k].onExitKey(m) 
   end for
return 1
end Function 

Function handleOkKey()     
   for each k in m.controls
      m.controls[k].onOkKey(m) 
   end for   
end Function
                       
' end of interface  

Json playlist file example:

{"playlist":
[
{"title": "Channel One",    "length": 0, "path": "http://www.playon.tv/online/iphone5/main.m3u8"},
{"title": "Channel Two",    "length": 0, "path": "http://www.nasa.gov/multimedia/nasatv/NTV-Public-IPS.m3u8"},
{"title": "Channel Three",  "length": 0, "path": "http://qthttp.apple.com.edgesuite.net/1010qwoeiuryfg/sl.m3u8"},
{"title": "Channel Four",   "length": 0, "path": "http://devimages.apple.com/iphone/samples/bipbop/gear1/prog_index.m3u8"},
{"title": "Channel Five",   "length": 0, "path": "http://184.72.239.149/vod/smil:BigBuckBunny.smil/playlist.m3u8"}
]
}

[RokuKC]

Well, presumably LoadNavigationContent is failing to read the file from ReadAsciiFile, so the string passed to ParseJSON is empty.

You might want to verify that "pkg:/json/content.json" is correct, as the most likely error is the file is not being found.

If you are using the Eclipse project, make sure that the json folder and content.json file is marked to be included in the zip file in the BrightScript Application Deployment.

[armagedon79]

Thanks