(Swift 2) Group: Refresh OAuth2 Access Token

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

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

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

    let json = CkoJsonObject()
    var success: Bool = json.LoadFile("qa_data/tokens/msGraphGroup.json")
    if success != true {
        return
    }

    let req = CkoHttpRequest()
    req.AddParam("grant_type", value: "refresh_token")
    req.AddParam("redirect_uri", value: "http://localhost:3017/")
    req.AddParam("client_id", value: "MICROSOFT-GRAPH-CLIENT-ID")
    req.AddParam("client_secret", value: "MICROSOFT-GRAPH-CLIENT-SECRET")
    req.AddParam("refresh_token", value: json.StringOf("refresh_token"))
    req.AddParam("scope", value: "openid profile offline_access user.readwrite group.readwrite.all files.readwrite")

    let http = CkoHttp()

    var resp: CkoHttpResponse? = http.PostUrlEncoded("https://login.microsoftonline.com/common/oauth2/v2.0/token", req: req)
    if http.LastMethodSuccess != true {
        print("\(http.LastErrorText)")
        return
    }

    // Load the JSON response.
    json.Load(resp!.BodyStr)
    json.EmitCompact = false

    // Show the JSON response.
    print("\(json.Emit())")

    print("Response status code: \(resp!.StatusCode.intValue)")

    // If the response status code is not 200, then it's an error.
    if resp!.StatusCode.intValue != 200 {
        return
    }

    resp = nil

    // Save the refreshed access token JSON to a file for future requests.
    let fac = CkoFileAccess()
    fac.WriteEntireTextFile("qa_data/tokens/msGraphGroup.json", fileData: json.Emit(), charset: "utf-8", includePreamble: false)

    print("Success.")

}