(Swift 3,4,5...) Calendar: Refresh Expired OAuth2 Access Token

Refreshes an expired OAuth2 access token.

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/msGraphCalendar.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.string(of: "refresh_token"))
    req.addParam("scope", value: "openid profile offline_access user.readwrite calendars.readwrite 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/msGraphCalendar.json", fileData: json.emit(), charset: "utf-8", includePreamble: false)

    print("Success.")

}