(Lianja) Group: Refresh OAuth2 Access Token

Refreshes an expired or non-expired OAuth2 access token for the Microsoft Group REST API.

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

loJson = createobject("CkJsonObject")
llSuccess = loJson.LoadFile("qa_data/tokens/msGraphGroup.json")
if (llSuccess <> .T.) then
    release loJson
    return
endif

loReq = createobject("CkHttpRequest")
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 group.readwrite.all files.readwrite")

loHttp = createobject("CkHttp")

loResp = loHttp.PostUrlEncoded("https://login.microsoftonline.com/common/oauth2/v2.0/token",loReq)
if (loHttp.LastMethodSuccess <> .T.) then
    ? loHttp.LastErrorText
    release loJson
    release loReq
    release loHttp
    return
endif

// Load the JSON response.
loJson.Load(loResp.BodyStr)
loJson.EmitCompact = .F.

// 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
    return
endif

release loResp

// Save the refreshed access token JSON to a file for future requests.
loFac = createobject("CkFileAccess")
loFac.WriteEntireTextFile("qa_data/tokens/msGraphGroup.json",loJson.Emit(),"utf-8",.F.)

? "Success."


release loJson
release loReq
release loHttp
release loFac