Dart Requires Chilkat v11.0.0+

HTTP POST JSON and Parse JSON Response

See more HTTP Examples

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

import 'package:chilkat/chilkat.dart';

void main() {
  // This example assumes the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final json = CkJsonObject();

  try {
    json.loadFile('qa_data/json/jsonBodyForHttpPost.json');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final http = CkHttp();

  final resp = CkHttpResponse();
  try {
    http.httpJson('POST', 'https://test.something.com/XYZ/API/v1/CreditInsuranceCalculator/CalculatePremiums', json, 'application/json', resp);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final jsonResp = CkJsonObject();
  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.  
  final lifeAmount = jsonResp.stringOf('LifeAmount');
  final lifeResidualAmount = jsonResp.stringOf('LifeResidualAmount');

  print('LifeAmount = $lifeAmount');
  print('LifeResidualAmount = $lifeResidualAmount');
}