PowerBuilder

Iterate Pages in Feed

See more Facebook Examples

Demonstrates how to read the next page in the user's Facebook feed, and iterates through all of the pages in the Facebook feed. PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Oauth2
oleobject loo_Rest
string ls_ResponseJson
oleobject loo_Json
oleobject loo_NextUrl
string ls_NextUrlStr

li_Success = 0

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// This example assumes a previously obtained an access token
loo_Oauth2 = create oleobject
li_rc = loo_Oauth2.ConnectToNewObject("Chilkat.OAuth2")
if li_rc < 0 then
    destroy loo_Oauth2
    MessageBox("Error","Connecting to COM object failed")
    return
end if
loo_Oauth2.AccessToken = "FACEBOOK-ACCESS-TOKEN"

loo_Rest = create oleobject
li_rc = loo_Rest.ConnectToNewObject("Chilkat.Rest")

// Connect to Facebook and send the following GET request:
li_Success = loo_Rest.Connect("graph.facebook.com",443,1,1)
if li_Success <> 1 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Oauth2
    destroy loo_Rest
    return
end if

// Provide the authentication credentials (i.e. the access key)
loo_Rest.SetAuthOAuth2(loo_Oauth2)

// Gets the 1st page in the user's feed.
ls_ResponseJson = loo_Rest.FullRequestNoBody("GET","/v2.7/me/feed")
if loo_Rest.LastMethodSuccess <> 1 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Oauth2
    destroy loo_Rest
    return
end if

loo_Json = create oleobject
li_rc = loo_Json.ConnectToNewObject("Chilkat.JsonObject")

loo_Json.EmitCompact = 0
loo_Json.Load(ls_ResponseJson)

// 
// See Parsing the Facebook User Feed for code showing how to parse the JSON feed content.
// 

loo_NextUrl = create oleobject
li_rc = loo_NextUrl.ConnectToNewObject("Chilkat.Url")

// Get the URL for the next page in the feed.
ls_NextUrlStr = loo_Json.StringOf("paging.next")
do while loo_Json.LastMethodSuccess = 1

    Write-Debug "Next page URL: " + ls_NextUrlStr

    loo_NextUrl.ParseUrl(ls_NextUrlStr)

    // Prepare for getting the next page in the feed.
    // We can continue using the same REST object.
    // If already connected, we'll continue using the existing connection.
    // Otherwise, a new connection will automatically be made if needed.
    loo_Rest.ClearAllQueryParams()
    loo_Rest.AddQueryParams(loo_NextUrl.Query)

    ls_ResponseJson = loo_Rest.FullRequestNoBody("GET","/v2.7/me/feed")
    if loo_Rest.LastMethodSuccess <> 1 then
        Write-Debug loo_Rest.LastErrorText
        destroy loo_Oauth2
        destroy loo_Rest
        destroy loo_Json
        destroy loo_NextUrl
        return
    end if

    loo_Json.Load(ls_ResponseJson)
    // See Parsing the Facebook User Feed for code showing how to parse the JSON feed content.

    // Get the URL for the next page.
    ls_NextUrlStr = loo_Json.StringOf("paging.next")
loop

Write-Debug "No more pages in the feed."


destroy loo_Oauth2
destroy loo_Rest
destroy loo_Json
destroy loo_NextUrl