(Swift) HttpPostJson2Async Example

Demonstrates use of the HttpPostJson2Async method.

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

    //  See PostJson2 Example for the synchronous equivalent of this example.

    let http = CkoHttp()

    var success: Bool

    //  Sends a POST equivalent to the following CURL command:

    //  curl -X POST https://sandbox.plaid.com/institutions/get \
    //    -H 'content-type: application/json' \
    //    -d '{
    //      "client_id": String,
    //      "secret":String,
    //      "count": Number,
    //      "offset": Number
    //    }'

    //  Suppress some default headers that would automatically added..
    http.AcceptCharset = ""
    http.UserAgent = ""
    http.AcceptLanguage = ""
    http.AllowGzip = false

    var jsonBody: String? = "{\"client_id\": \"PLAID_CLIENT_ID\", \"secret\":\"PLAID_SECRET\", \"count\": 10, \"offset\": 0}"
    var task: CkoTask? = http.PostJson2Async("https://sandbox.plaid.com/institutions/get", contentType: "application/json", jsonText: jsonBody)
    if http.LastMethodSuccess == false {
        print("\(http.LastErrorText)")
        return
    }

    //  Start the background task.
    success = task!.Run()
    if !success {
        print("\(task!.LastErrorText)")
        task = nil
        return
    }

    //  The application is now free to do anything else
    //  while the HTTP POST is in progress

    //  For this example, we'll simply sleep and periodically
    //  check to see if the HTTP POST is finished.
    while task!.Finished != true {
        //  Sleep 100 ms.
        task!.SleepMs(100)
    }

    //  When we get here, the task is either finished successfully or not, or was canceled/aborted.

    //  If the task was "canceled", it was canceled prior to actually starting.  This could
    //  happen if the task was canceled while waiting in a thread pool queue to be scheduled by Chilkat's
    //  background thread pool scheduler.

    //  If the task was "aborted", it indicates that it was canceled while running in a background thread.
    //  The ResultErrorText will likely indicate that the task was aborted.

    //  If the task "completed", then it ran to completion, but the actual success/failure of the method
    //  is determined by getting the result of the underlying method call.
    //  A task status of 7 indicates completion.
    if task!.StatusInt.intValue != 7 {
        print("Task did not complete.")
        print("task status: \(task!.Status)")
        task = nil
        return
    }

    //  When called synchronously, the PostJson2 method returns an HTTP response object,
    //  unless the method failed and there was no response to be had.
    //  Check to see if PostJson2 method failed (and thus there is no response object).
    if task!.TaskSuccess == false {
        print("The underlying task failed, and there is no HTTP response object.")
        print("The LastErrorText for the underlying method call is:")
        print("\(task!.ResultErrorText)")
        task = nil
        return
    }

    //  To get the HTTP response object, create a new instance and load it with the result from the task.
    let resp = CkoHttpResponse()
    resp.LoadTaskResult(task)
    task = nil

    var statusCode: Int = resp.StatusCode.intValue
    print("Response status code = \(statusCode)")

    //  Examine the JSON response..
    let json = CkoJsonObject()
    json.Load(resp.BodyStr)
    json.EmitCompact = false
    print("JSON Response Body:")
    print("\(json.Emit())")

}