Lianja

Calendar: Refresh Expired OAuth2 Access Token

See more Microsoft Calendar Examples

Refreshes an expired OAuth2 access token. Lianja

llSuccess = .F.

// 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/msGraphCalendar.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 calendars.readwrite files.readwrite")

loHttp = createobject("CkHttp")

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

loResp = createobject("CkHttpResponse")
llSuccess = loHttp.HttpReq("https://login.microsoftonline.com/common/oauth2/v2.0/token",loReq,loResp)
if (llSuccess = .F.) then
    ? loHttp.LastErrorText
    release loJson
    release loReq
    release loHttp
    release loResp
    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
    release loResp
    return
endif

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

? "Success."


release loJson
release loReq
release loHttp
release loResp
release loFac