B4X

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. B4X

Dim success As Boolean = False

'  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
Dim oauth2 As ChilkatOAuth2
oauth2.Initialize("oauth2")
oauth2.AccessToken = "FACEBOOK-ACCESS-TOKEN"

Dim rest As ChilkatRest
rest.Initialize("rest")

'  Connect to Facebook and send the following GET request:
success = rest.Connect("graph.facebook.com", 443, True, True)
If success <> True Then
    Log(rest.LastErrorText)
    Return
End If


'  Provide the authentication credentials (i.e. the access key)
rest.SetAuthOAuth2(oauth2)

'  Gets the 1st page in the user's feed.
Dim responseJson As String = rest.FullRequestNoBody("GET", "/v2.7/me/feed")
If rest.LastMethodSuccess <> True Then
    Log(rest.LastErrorText)
    Return
End If


Dim json As ChilkatJsonObject
json.Initialize
json.EmitCompact = False
json.Load(responseJson)

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

Dim nextUrl As ChilkatUrl
nextUrl.Initialize

'  Get the URL for the next page in the feed.
Dim nextUrlStr As String = json.StringOf("paging.next")
Do While json.LastMethodSuccess = True

    Log("Next page URL: " & nextUrlStr)

    nextUrl.ParseUrl(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.
    rest.ClearAllQueryParams
    rest.AddQueryParams(nextUrl.Query)

    responseJson = rest.FullRequestNoBody("GET", "/v2.7/me/feed")
    If rest.LastMethodSuccess <> True Then
        Log(rest.LastErrorText)
        Return
    End If


    json.Load(responseJson)
    '  See Parsing the Facebook User Feed for code showing how to parse the JSON feed content.

    '  Get the URL for the next page.
    nextUrlStr = json.StringOf("paging.next")
Loop

Log("No more pages in the feed.")