CreateObject roUrlTransfer returning Invalid

Archived
1

Hello

I have some fairly simple code:


testRequest = CreateObject("roUrlTransfer")
testRequest.SetUrl("http://blog.roku.com/developer")

The fails every time with this error:


BrightScript Debugger> 
Current Function:
019:    testRequest = CreateObject("roUrlTransfer")
020:*     testRequest.SetUrl("http://blog.roku.com/developer")
021:  
'Dot' Operator attempted with invalid BrightScript Component or interface reference. (runtime error &hec) in ...AAAAy0HwSV/pkg:/source/categories.brs(20)
020:     testRequest.SetUrl("http://blog.roku.com/developer")
Backtrace:
#1  Function showcategories() As Void
   file/line: ...AAAAy0HwSV/pkg:/source/categories.brs(20)
#0  Function init() As Void
   file/line: ...AAAAy0HwSV/pkg:/source/categories.brs(9)
Local Variables:
global           rotINTERFACE:ifGlobal
m                roAssociativeArray refcnt=4 count:4
testrequest      Invalid

Why is it always Invalid?

2

I for one am stumped. It shouldn’t happen. Typically you’d get invalid from createObject if it failed to create what’s requested. I thought maybe you created too many URLs - then i typed some code in console to create 10,000 roUrlTransfer but canceled it out of patience - still it created 3569 objects just fine:

BrightScript Debugger> a = [] : for ii=1 to 10000 : a.push(CreateObject("roUrlTransfer")) : next
^C
BREAK (runtime error &hf8) in $LIVECOMPILE(73)

BrightScript Debugger> ? ii, a.count()
 3570     3569

BrightScript Debugger> ? a[3500]
<Component: roUrlTransfer>

BrightScript Debugger> a[3500].SetUrl("http://blog.roku.com/developer")

BrightScript Debugger> bscs
                  roArray: 14
       roAssociativeArray: 106
              roByteArray: 1
                 roGlobal: 1
            roImageCanvas: 1
                    roInt: 2
                   roList: 8
            roMessagePort: 8
                 roString: 187
               roUrlEvent: 8
            roUrlTransfer: 3579
       Total # components: 3915

How does it act if you type in console your 2-line snippet, after the run was interrupted by the error?

3

I think I may have found the cause.

This code was being called from within ‘sub init()’ in a a ‘categories.brs’ file that was included from a categories.xml file as such:


<script type="text/brightscript" uri="pkg:/source/categories.brs" />

If I take it out of this file and move it to the main.brs file that has ‘sub Main()’ it works just fine from there.

So I dunno if this is maybe a security thing not to allow creating url connections from code referenced from XML files or not.

4

Oh, that’s the new XML carp?
There is a beadroll of unsupported fn here http://sdkdocs.roku.com/display/sdkdoc/ … pt+Support
No reason is given, my guess is thread-unsafe

5

“EnTerr” wrote:
Oh, that’s the new XML carp?

I figured it must be something like that.

I’ve already discovered the legacy regular roku interface code and have coded my channel in that. Works great!!! No XML nonsense either. Sure the resolution is a bit old-school, but it works :slightly_smiling_face:

Thanks for the link though, I appreciate it :slightly_smiling_face:

6

In SceneGraph, all web requests have to be made from a Task node. You cannot make web requests from the main UI thread, which is the context in which init() runs.

7

Hello,

I am trying to integrate external API into my channel for that i have created new brs file and i got the below error.

filereadInternet = createObject(“roUrlTransfer”)
readInternet.setUrl("https://dummy.restapiexample.com/api/v1/employees")
htmlOp = readInternet.GetToString()

‘Dot’ Operator attempted with invalid BrightScript Component or interface reference at setUrl component.Please provide the correct process.

8

You have filereadInternet on one line and readInternet on the other.

9

Hello,

I am trying to integrate external API into my channel for that i have created new brs file and i got the below error.

request = createObject(“roUrlTransfer”)
request.setUrl(“https://dummy.restapiexample.com/api/v1/employees”)
html = request.GetToString()

‘Dot’ Operator attempted with invalid BrightScript Component or interface reference at setUrl component.Please provide the correct process.

10

@NicholasStokes , if you print “request” you’ll probably see that it’s invalid. You can’t use roUrlTransfer in the render thread I’m going to assume is what you’re trying to do. You have to set up a task or use it in the main thread.