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kidasov
Level 7

How to start task again?

I have a problem with task. I want to get data from the server. So I have a task:
sub init()
   m.top.functionName = "executeTask"
vimeoClientID = "clientId"
    vimeoClientSecret = "clientSecret+"
    
    blob = CreateObject("roByteArray")
    blob.FromAsciiString(vimeoClientID + ":" + vimeoClientSecret)
    
    m.base64Vimeo = blob.ToBase64String()
end sub

function executeTask()    
    url = m.top.url
    
    print("In execute task function")
    
    request = CreateObject("roURLTransfer")
    request.SetCertificatesFile("common:/certs/ca-bundle.crt")
    request.AddHeader("X-Roku-Reserved-Dev-Id", "")
    request.AddHeader("Authorization","basic " + m.base64Vimeo)
    request.InitClientCertificates()
    request.SetURL(url)
    
    m.top.response = request.getToString()
    m.top.request = url
end function

In mainscene I create a task in main function
sub init()
    m.requestTask = CreateObject("roSGNode", "RequestTask")    [size=85][font=Helvetica Neue, Helvetica, Arial, sans-serif]   [/font][/size]
end sub


Also there is a function to start my task.
sub makeURLRequest(props)
m.requestTask.setField("url", props.url)
m.requestTask.control = "RUN"
m.requestTask.observeField("response", props.callback)
end sub

I get data (bunch of videos) from server like this:
sub getVimeoChannelVideosPage(page, callback)
print("Making request for page: " + page.toStr())
makeURLRequest({
url: "https://api.vimeo.com/channels/" + m.channel.id + "/videos?page=" + page.toStr(),
callback: callback,
})
end sub

sub getVimeoChannelVideos(callback)
getVimeoChannelVideosPage(1, "onGetVimeoVideosPage")
end sub

And the problem happens in callback when I get first page with videos and  want to get another one page by restarting task. But code in executeTask function  never happens.
sub onGetVimeoVideosPage()
response = m.requestTask.response
json = parseJSON(response)

videos = json.data
nextPage = json.paging.next

if (nextPage <> invalid)
m.channel.currentPage += 1
print("Current page " + m.channel.currentPage.toStr())
getVimeoChannelVideosPage(m.channel.currentPage, "onGetVimeoVideosPage")
else
showScene(m.homeScene)
end if

end sub

I highly appreciate any help or advice. Also feel so sorry for my bad english.
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1 Reply
tim_beynart
Level 7

Re: How to start task again?

I'd suggest that instead of storing a reference to the task, create a new one for each request.
With your current implementation, you could try adding a STOP but it may not work:
sub makeURLRequest(props)
 m.requestTask.control = "STOP"
 m.requestTask.setField("url", props.url)
 m.requestTask.control = "RUN"
 m.requestTask.observeField("response", props.callback)
end sub
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