(Visual FoxPro) 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 ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL loOauth2
LOCAL loRest
LOCAL lnSuccess
LOCAL lcResponseJson
LOCAL loJson
LOCAL loNextUrl
LOCAL lcNextUrlStr

* 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
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.OAuth2')
loOauth2 = CreateObject('Chilkat.OAuth2')
loOauth2.AccessToken = "FACEBOOK-ACCESS-TOKEN"

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Rest')
loRest = CreateObject('Chilkat.Rest')

* Connect to Facebook and send the following GET request:
lnSuccess = loRest.Connect("graph.facebook.com",443,1,1)
IF (lnSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loOauth2
    RELEASE loRest
    CANCEL
ENDIF

* Provide the authentication credentials (i.e. the access key)
loRest.SetAuthOAuth2(loOauth2)

* Gets the 1st page in the user's feed.
lcResponseJson = loRest.FullRequestNoBody("GET","/v2.7/me/feed")
IF (loRest.LastMethodSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loOauth2
    RELEASE loRest
    CANCEL
ENDIF

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.JsonObject')
loJson = CreateObject('Chilkat.JsonObject')
loJson.EmitCompact = 0
loJson.Load(lcResponseJson)

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

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Url')
loNextUrl = CreateObject('Chilkat.Url')

* Get the URL for the next page in the feed.
lcNextUrlStr = loJson.StringOf("paging.next")
DO WHILE loJson.LastMethodSuccess = 1

    ? "Next page URL: " + lcNextUrlStr

    loNextUrl.ParseUrl(lcNextUrlStr)

    * 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.
    loRest.ClearAllQueryParams()
    loRest.AddQueryParams(loNextUrl.Query)

    lcResponseJson = loRest.FullRequestNoBody("GET","/v2.7/me/feed")
    IF (loRest.LastMethodSuccess <> 1) THEN
        ? loRest.LastErrorText
        RELEASE loOauth2
        RELEASE loRest
        RELEASE loJson
        RELEASE loNextUrl
        CANCEL
    ENDIF

    loJson.Load(lcResponseJson)
    * See Parsing the Facebook User Feed for code showing how to parse the JSON feed content.

    * Get the URL for the next page.
    lcNextUrlStr = loJson.StringOf("paging.next")
ENDDO

? "No more pages in the feed."

RELEASE loOauth2
RELEASE loRest
RELEASE loJson
RELEASE loNextUrl