(Go) Calendar: Refresh Expired OAuth2 Access Token

Refreshes an expired OAuth2 access token.

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

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

    json := chilkat.NewJsonObject()
    success := json.LoadFile("qa_data/tokens/msGraphCalendar.json")
    if success != true {
        json.DisposeJsonObject()
        return
    }

    req := chilkat.NewHttpRequest()
    req.AddParam("grant_type","refresh_token")
    req.AddParam("redirect_uri","http://localhost:3017/")
    req.AddParam("client_id","MICROSOFT-GRAPH-CLIENT-ID")
    req.AddParam("client_secret","MICROSOFT-GRAPH-CLIENT-SECRET")
    req.AddParam("refresh_token",*json.StringOf("refresh_token"))
    req.AddParam("scope","openid profile offline_access user.readwrite calendars.readwrite files.readwrite")

    http := chilkat.NewHttp()

    resp := http.PostUrlEncoded("https://login.microsoftonline.com/common/oauth2/v2.0/token",req)
    if http.LastMethodSuccess() != true {
        fmt.Println(http.LastErrorText())
        json.DisposeJsonObject()
        req.DisposeHttpRequest()
        http.DisposeHttp()
        return
    }

    // Load the JSON response.
    json.Load(resp.BodyStr())
    json.SetEmitCompact(false)

    // Show the JSON response.
    fmt.Println(*json.Emit())

    fmt.Println("Response status code: ", resp.StatusCode())

    // If the response status code is not 200, then it's an error.
    if resp.StatusCode() != 200 {
        json.DisposeJsonObject()
        req.DisposeHttpRequest()
        http.DisposeHttp()
        return
    }

    resp.DisposeHttpResponse()

    // Save the refreshed access token JSON to a file for future requests.
    fac := chilkat.NewFileAccess()
    fac.WriteEntireTextFile("qa_data/tokens/msGraphCalendar.json",*json.Emit(),"utf-8",false)

    fmt.Println("Success.")

    json.DisposeJsonObject()
    req.DisposeHttpRequest()
    http.DisposeHttp()
    fac.DisposeFileAccess()