(VB.NET) Iterate Pages in Feed

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

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

' 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 New Chilkat.OAuth2
oauth2.AccessToken = "FACEBOOK-ACCESS-TOKEN"

Dim rest As New Chilkat.Rest

' Connect to Facebook and send the following GET request:
Dim success As Boolean = rest.Connect("graph.facebook.com",443,True,True)
If (success <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
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
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


Dim json As New Chilkat.JsonObject
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 New Chilkat.Url

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

    Debug.WriteLine("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
        Debug.WriteLine(rest.LastErrorText)
        Exit Sub
    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")
End While

Debug.WriteLine("No more pages in the feed.")