Dart

Simple REST Example

See more REST Examples

Demonstrates a very simple RESTful API call to get a stock time series daily (quotes) from Alpha Vantage. Dart

import 'package:chilkat/chilkat.dart';

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

  final rest = CkRest();

  // Connect to the REST server.
  final bTls = true;
  final port = 443;
  final bAutoReconnect = true;
  try {
    rest.connect('www.alphavantage.co', port, bTls, bAutoReconnect);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Get a stock quote:
  // Sending GET request to https://www.alphavantage.co/query?function=TIME_SERIES_DAILY&symbol=MSFT&apikey=my_api_key
  rest.addQueryParam('function', 'TIME_SERIES_DAILY');
  rest.addQueryParam('symbol', 'AAPL');
  rest.addQueryParam('apikey', 'my_api_key');
  final String responseJson;
  try {
    responseJson = rest.fullRequestNoBody('GET', '/query');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print(responseJson);

  // Sample response:
  // {
  //     "Meta Data": {
  //         "1. Information": "Daily Prices (open, high, low, close) and Volumes",
  //         "2. Symbol": "AAPL",
  //         "3. Last Refreshed": "2019-12-06",
  //         "4. Output Size": "Compact",
  //         "5. Time Zone": "US/Eastern"
  //     },
  //     "Time Series (Daily)": {
  //         "2019-12-06": {
  //             "1. open": "267.4800",
  //             "2. high": "271.0000",
  //             "3. low": "267.3000",
  //             "4. close": "270.7100",
  //             "5. volume": "25447644"
  //         },
  //         "2019-12-05": {
  //             "1. open": "263.7900",
  //             "2. high": "265.8900",
  //             "3. low": "262.7300",
  //             "4. close": "265.5800",
  //             "5. volume": "18661343"
  //         },
  //         "2019-12-04": {
  //             "1. open": "261.0700",
  //             "2. high": "263.3100",
  //             "3. low": "260.6800",
  //             "4. close": "261.7400",
  //             "5. volume": "16810388"
  //         },
  // ...
  //         "2019-07-18": {
  //             "1. open": "204.0000",
  //             "2. high": "205.8800",
  //             "3. low": "203.7000",
  //             "4. close": "205.6600",
  //             "5. volume": "18582161"
  //         }
  //     }
  // }
}