(Swift 3,4,5...) HTTP POST JSON and Parse JSON Response

Demonstrates how to send a JSON POST and then parse the JSON response.

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

func chilkatTest() {
    // This example assumes 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/json/jsonBodyForHttpPost.json")
    if success != true {
        print("\(json.lastErrorText!)")
        return
    }

    let http = CkoHttp()!

    var resp: CkoHttpResponse? = http.postJson2("https://test.something.com/XYZ/API/v1/CreditInsuranceCalculator/CalculatePremiums", contentType: "application/json", jsonText: json.emit())
    if http.lastMethodSuccess != true {
        print("\(http.lastErrorText!)")
        return
    }

    let jsonResp = CkoJsonObject()!
    jsonResp.load(resp!.bodyStr)

    jsonResp.emitCompact = false
    print("\(jsonResp.emit()!)")

    // The JSON response to be parsed looks like this:
    // {
    //   "LifeAmount": 513.85,
    //   "LifeResidualAmount": 123.38,
    //   "CriticalIllnessAmount": 0,
    //   "CriticalIllnessResidualAmount": 0,
    //   "DisabilityAmount": 881.70,
    //   "PolicyFee": 0.00,
    //   "PolicyFeeSecondary": 0,
    //   "PolicyFeeHidden": 50.00,
    //   "PolicyFeeHiddenSecondary": 0
    // }

    // We can get the floating point numbers as strings.  Then convert to double
    // using the appropriate string-to-double conversion for your programming language.
    // For example, in C++ use atof.  In C# use Convert.ToDouble.  
    var lifeAmount: String? = jsonResp.string(of: "LifeAmount")
    var lifeResidualAmount: String? = jsonResp.string(of: "LifeResidualAmount")

    print("LifeAmount = \(lifeAmount!)")
    print("LifeResidualAmount = \(lifeResidualAmount!)")

}