(Swift 3,4,5...) HttpPostJson2Async Example

Demonstrates use of the HttpPostJson2Async method.

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

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()!)")

}