Visual FoxPro

Calendar: Refresh Expired OAuth2 Access Token

See more Microsoft Calendar Examples

Refreshes an expired OAuth2 access token. Visual FoxPro

LOCAL lnSuccess
LOCAL loJson
LOCAL loReq
LOCAL loHttp
LOCAL loResp
LOCAL loFac

lnSuccess = 0

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

loJson = CreateObject('Chilkat.JsonObject')
lnSuccess = loJson.LoadFile("qa_data/tokens/msGraphCalendar.json")
IF (lnSuccess <> 1) THEN
    RELEASE loJson
    CANCEL
ENDIF

loReq = CreateObject('Chilkat.HttpRequest')
loReq.AddParam("grant_type","refresh_token")
loReq.AddParam("redirect_uri","http://localhost:3017/")
loReq.AddParam("client_id","MICROSOFT-GRAPH-CLIENT-ID")
loReq.AddParam("client_secret","MICROSOFT-GRAPH-CLIENT-SECRET")
loReq.AddParam("refresh_token",loJson.StringOf("refresh_token"))
loReq.AddParam("scope","openid profile offline_access user.readwrite calendars.readwrite files.readwrite")

loHttp = CreateObject('Chilkat.Http')

loReq.HttpVerb = "POST"
loReq.ContentType = "application/x-www-form-urlencoded"

loResp = CreateObject('Chilkat.HttpResponse')
lnSuccess = loHttp.HttpReq("https://login.microsoftonline.com/common/oauth2/v2.0/token",loReq,loResp)
IF (lnSuccess = 0) THEN
    ? loHttp.LastErrorText
    RELEASE loJson
    RELEASE loReq
    RELEASE loHttp
    RELEASE loResp
    CANCEL
ENDIF

* Load the JSON response.
loJson.Load(loResp.BodyStr)
loJson.EmitCompact = 0

* Show the JSON response.
? loJson.Emit()

? "Response status code: " + STR(loResp.StatusCode)

* If the response status code is not 200, then it's an error.
IF (loResp.StatusCode <> 200) THEN
    RELEASE loJson
    RELEASE loReq
    RELEASE loHttp
    RELEASE loResp
    CANCEL
ENDIF

* Save the refreshed access token JSON to a file for future requests.
loFac = CreateObject('Chilkat.FileAccess')
loFac.WriteEntireTextFile("qa_data/tokens/msGraphCalendar.json",loJson.Emit(),"utf-8",0)

? "Success."

RELEASE loJson
RELEASE loReq
RELEASE loHttp
RELEASE loResp
RELEASE loFac