Roku Developer Program

[zuber]

I am using VideoPlayer from ROKU SDK.

How can I implement to also support JSON file on the videoplayer app?


I want use both XML from videoplayer and JSON from here https://blog.roku.com/developer/2012/07/16/json-support-comes-to-roku/

Here is the code from categoryfeed.brs

'******************************************************
'**  Video Player Example Application -- Category Feed 
'**  November 2009
'**  Copyright (c) 2009 Roku Inc. All Rights Reserved.
'******************************************************

'******************************************************
' Set up the category feed connection object
' This feed provides details about top level categories 
'******************************************************
Function InitCategoryFeedConnection() As Object

    conn = CreateObject("roAssociativeArray")

    conn.UrlPrefix   = "http://xxx.myweb.com/xml/"
    conn.UrlCategoryFeed = conn.UrlPrefix + "/categories.xml"

    conn.Timer = CreateObject("roTimespan")

    conn.LoadCategoryFeed    = load_category_feed
    conn.GetCategoryNames    = get_category_names

    print "created feed connection for " + conn.UrlCategoryFeed
    return conn

End Function

'*********************************************************
'** Create an array of names representing the children
'** for the current list of categories. This is useful
'** for filling in the filter banner with the names of
'** all the categories at the next level in the hierarchy
'*********************************************************
Function get_category_names(categories As Object) As Dynamic

    categoryNames = CreateObject("roArray", 100, true)

    for each category in categories.kids
        'print category.Title
        categoryNames.Push(category.Title)
    next

    return categoryNames

End Function


'******************************************************************
'** Given a connection object for a category feed, fetch,
'** parse and build the tree for the feed.  the results are
'** stored hierarchically with parent/child relationships
'** with a single default node named Root at the root of the tree
'******************************************************************
Function load_category_feed(conn As Object) As Dynamic

    http = NewHttp(conn.UrlCategoryFeed)

    Dbg("url: ", http.Http.GetUrl())

    m.Timer.Mark()
    rsp = http.GetToStringWithRetry()
    Dbg("Took: ", m.Timer)

    m.Timer.Mark()
    xml=CreateObject("roXMLElement")
    if not xml.Parse(rsp) then
         print "Can't parse feed"
        return invalid
    endif
    Dbg("Parse Took: ", m.Timer)

    m.Timer.Mark()
    if xml.category = invalid then
        print "no categories tag"
        return invalid
    endif

    if islist(xml.category) = false then
        print "invalid feed body"
        return invalid
    endif

    if xml.category[0].GetName() <> "category" then
        print "no initial category tag"
        return invalid
    endif

    topNode = MakeEmptyCatNode()
    topNode.Title = "root"
    topNode.isapphome = true

    print "begin category node parsing"

    categories = xml.GetChildElements()
    print "number of categories: " + itostr(categories.Count())
    for each e in categories 
        o = ParseCategoryNode(e)
        if o <> invalid then
            topNode.AddKid(o)
            print "added new child node"
        else
            print "parse returned no child node"
        endif
    next
    Dbg("Traversing: ", m.Timer)

    return topNode

End Function

'******************************************************
'MakeEmptyCatNode - use to create top node in the tree
'******************************************************
Function MakeEmptyCatNode() As Object
    return init_category_item()
End Function


'***********************************************************
'Given the xml element to an <Category> tag in the category
'feed, walk it and return the top level node to its tree
'***********************************************************
Function ParseCategoryNode(xml As Object) As dynamic
    o = init_category_item()

    print "ParseCategoryNode: " + xml.GetName()
    'PrintXML(xml, 5)

    'parse the curent node to determine the type. everything except
    'special categories are considered normal, others have unique types 
    if xml.GetName() = "category" then
        print "category: " + xml@title + " | " + xml@description
        o.Type = "normal"
        o.Title = xml@title
        o.Description = xml@Description
        o.ShortDescriptionLine1 = xml@Title
        o.ShortDescriptionLine2 = xml@Description
        o.SDPosterURL = xml@sd_img
        o.HDPosterURL = xml@hd_img
    elseif xml.GetName() = "categoryLeaf" then
        o.Type = "normal"
    elseif xml.GetName() = "specialCategory" then
        if invalid <> xml.GetAttributes() then
            for each a in xml.GetAttributes()
                if a = "type" then
                    o.Type = xml.GetAttributes()[a]
                    print "specialCategory: " + xml@type + "|" + xml@title + " | " + xml@description
                    o.Title = xml@title
                    o.Description = xml@Description
                    o.ShortDescriptionLine1 = xml@Title
                    o.ShortDescriptionLine2 = xml@Description
                    o.SDPosterURL = xml@sd_img
                    o.HDPosterURL = xml@hd_img
                endif
            next
        endif
    else
        print "ParseCategoryNode skip: " + xml.GetName()
        return invalid
    endif

    'only continue processing if we are dealing with a known type
    'if new types are supported, make sure to add them to the list
    'and parse them correctly further downstream in the parser 
    while true
        if o.Type = "normal" exit while
        if o.Type = "special_category" exit while
        print "ParseCategoryNode unrecognized feed type"
        return invalid
    end while 

    'get the list of child nodes and recursed
    'through everything under the current node
    for each e in xml.GetBody()
        name = e.GetName()
        if name = "category" then
            print "category: " + e@title + " [" + e@description + "]"
            kid = ParseCategoryNode(e)
            kid.Title = e@title
            kid.Description = e@Description
            kid.ShortDescriptionLine1 = xml@Description
            kid.SDPosterURL = xml@sd_img
            kid.HDPosterURL = xml@hd_img
            o.AddKid(kid)
        elseif name = "categoryLeaf" then
            print "categoryLeaf: " + e@title + " [" + e@description + "]"
            kid = ParseCategoryNode(e)
            kid.Title = e@title
            kid.Description = e@Description
            kid.Feed = e@feed
            o.AddKid(kid)
        elseif name = "specialCategory" then
            print "specialCategory: " + e@title + " [" + e@description + "]"
            kid = ParseCategoryNode(e)
            kid.Title = e@title
            kid.Description = e@Description
            kid.sd_img = e@sd_img
            kid.hd_img = e@hd_img
            kid.Feed = e@feed
            o.AddKid(kid)
        endif
    next

    return o
End Function


'******************************************************
'Initialize a Category Item
'******************************************************
Function init_category_item() As Object
    o = CreateObject("roAssociativeArray")
    o.Title       = ""
    o.Type        = "normal"
    o.Description = ""
    o.Kids        = CreateObject("roArray", 100, true)
    o.Parent      = invalid
    o.Feed        = ""
    o.IsLeaf      = cn_is_leaf
    o.AddKid      = cn_add_kid
    return o
End Function


'********************************************************
'** Helper function for each node, returns true/false
'** indicating that this node is a leaf node in the tree
'********************************************************
Function cn_is_leaf() As Boolean
    if m.Kids.Count() > 0 return true
    if m.Feed <> "" return false
    return true
End Function


'*********************************************************
'** Helper function for each node in the tree to add a 
'** new node as a child to this node.
'*********************************************************
Sub cn_add_kid(kid As Object)
    if kid = invalid then
        print "skipping: attempt to add invalid kid failed"
        return
     endif
    
    kid.Parent = m
    m.Kids.Push(kid)
End Sub
 

[zuber]

Anyone?

[bathejasumeet]

I suppose you want to retrieve the url for the video from the JSON :
you need to create a roUrlTransfer object, use the setUrl method of roUrlTransfer passing in the argument as the url to the JSON, use the getToString() method of the created roUrlTransfer object to receive the JSON string from the url , and then use the utility method ParseJson to get the Associative array equivalent to the json

url_transfer_object=CreateObject("roUrlTransfer")
url_transfer_object.setUrl("your json service providing url")
json_equivalent_associative_array=ParseJson(urlTransferObject.GetToString())