Dart

Magyar Nemzeti Bank (MNB) Get Currencies

See more REST Misc Examples

The Magyar Nemzeti Bank (MNB) is the central bank of Hungary. In this role, its primary objective is to achieve and maintain price stability. The MNB website is available to visitors in both Hungarian and English. The MNB provides the Arfolyam (trans. Exchange Rate) API, which can be used to retrieve current and historic currency exchange rates. This service uses SOAP calls issued in XML format.

This example gets a list of currencies.

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  final rest = CkRest();

  // URL: http://www.mnb.hu/arfolyamok.asmx
  final bTls = false;
  final port = 80;
  final bAutoReconnect = true;
  try {
    rest.connect('www.mnb.hu', port, bTls, bAutoReconnect);
  } on ChilkatException catch (e) {
    print('ConnectFailReason: ${rest.connectFailReason}');
    print(e.lastErrorText);
    return;
  }

  // --------------------------------------------------------------------------------
  // Also see Chilkat's Online WSDL Code Generator
  // to generate code and SOAP Request and Response XML for each operation in a WSDL.
  // --------------------------------------------------------------------------------

  final xml = CkXml();
  xml.tag = 'soapenv:Envelope';
  xml.addAttribute('xmlns:soapenv', 'http://schemas.xmlsoap.org/soap/envelope/');
  xml.addAttribute('xmlns:web', 'http://www.mnb.hu/webservices/');
  xml.updateChildContent('soapenv:Header', '');
  xml.updateChildContent('soapenv:Body|web:GetCurrencies', '');

  rest.addHeader('Content-Type', 'text/xml');
  rest.addHeader('SOAPAction', '/webservices/MNBArfolyamServiceSoap/GetCurrencies');
  rest.addHeader('Accept', 'application/xml');

  final sbRequestBody = CkStringBuilder();
  xml.getXmlSb(sbRequestBody);
  final sbResponseBody = CkStringBuilder();
  try {
    rest.fullRequestSb('POST', '/arfolyamok.asmx', sbRequestBody, sbResponseBody);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final respStatusCode = rest.responseStatusCode;
  if (respStatusCode >= 400) {
    print('Response Status Code = $respStatusCode');
    print('Response Header:');
    print(rest.responseHeader);
    print('Response Body:');
    print(sbResponseBody.getAsString());
    return;
  }

  print('response status code = $respStatusCode');

  final xmlResponse = CkXml();
  xmlResponse.loadSb(sbResponseBody, true);
  print(xmlResponse.getXml());

  // The XML response contains this:
  // <?xml version="1.0" encoding="utf-8" ?>
  // <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
  //     <s:Body>
  //         <GetCurrenciesResponse xmlns="http://www.mnb.hu/webservices/" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
  //             <GetCurrenciesResult>&lt;MNBCurrencies&gt;&lt;Currencies&gt;&lt;Curr&gt;HUF&lt;/Curr&gt;&lt;Curr&gt;EUR&lt;/Curr&gt;&lt;Curr&gt;AUD&lt;/Curr&gt; ... &lt;/MNBCurrencies&gt;</GetCurrenciesResult>
  //         </GetCurrenciesResponse>
  //     </s:Body>
  // </s:Envelope>

  // Get the GetCurrenciesResult
  final resultEncoded = xmlResponse.getChildContent('s:Body|GetCurrenciesResponse|GetCurrenciesResult');
  print(resultEncoded);

  // Entity decode the result to get XML.
  final sbResult = CkStringBuilder();
  sbResult.append(resultEncoded);
  sbResult.entityDecode();

  // Load it into XML.
  final xmlResult = CkXml();
  xmlResult.loadSb(sbResult, true);
  print(xmlResult.getXml());

  // The result is this:

  // <?xml version="1.0" encoding="utf-8" ?>
  // <MNBCurrencies>
  //     <Currencies>
  //         <Curr>HUF</Curr>
  //         <Curr>EUR</Curr>
  //         <Curr>AUD</Curr>
  //         <Curr>BGN</Curr>
  //         <Curr>BRL</Curr>
  //         <Curr>CAD</Curr>
  //         <Curr>CHF</Curr>
  //         <Curr>CNY</Curr>
  //         <Curr>CZK</Curr>
  //         <Curr>DKK</Curr>
  //         <Curr>GBP</Curr>
  //         <Curr>HKD</Curr>
  //         <Curr>HRK</Curr>
  //         <Curr>IDR</Curr>
  //         <Curr>ILS</Curr>
  //         <Curr>INR</Curr>
  //         <Curr>ISK</Curr>
  //         <Curr>JPY</Curr>
  //         <Curr>KRW</Curr>
  //         <Curr>MXN</Curr>
  //         <Curr>MYR</Curr>
  //         <Curr>NOK</Curr>
  //         <Curr>NZD</Curr>
  //         <Curr>PHP</Curr>
  //         <Curr>PLN</Curr>
  //         <Curr>RON</Curr>
  //         <Curr>RSD</Curr>
  //         <Curr>RUB</Curr>
  //         <Curr>SEK</Curr>
  //         <Curr>SGD</Curr>
  //         <Curr>THB</Curr>
  //         <Curr>TRY</Curr>
  //         <Curr>UAH</Curr>
  //         <Curr>USD</Curr>
  //         <Curr>ZAR</Curr>
  //         <Curr>ATS</Curr>
  //         <Curr>AUP</Curr>
  //         <Curr>BEF</Curr>
  //         <Curr>BGL</Curr>
  //         <Curr>CYN</Curr>
  //         <Curr>CSD</Curr>
  //         <Curr>CSK</Curr>
  //         <Curr>DDM</Curr>
  //         <Curr>DEM</Curr>
  //         <Curr>EEK</Curr>
  //         <Curr>EGP</Curr>
  //         <Curr>ESP</Curr>
  //         <Curr>FIM</Curr>
  //         <Curr>FRF</Curr>
  //         <Curr>GHP</Curr>
  //         <Curr>GRD</Curr>
  //         <Curr>IEP</Curr>
  //         <Curr>ITL</Curr>
  //         <Curr>KPW</Curr>
  //         <Curr>KWD</Curr>
  //         <Curr>LBP</Curr>
  //         <Curr>LTL</Curr>
  //         <Curr>LUF</Curr>
  //         <Curr>LVL</Curr>
  //         <Curr>MNT</Curr>
  //         <Curr>NLG</Curr>
  //         <Curr>OAL</Curr>
  //         <Curr>OBL</Curr>
  //         <Curr>OFR</Curr>
  //         <Curr>ORB</Curr>
  //         <Curr>PKR</Curr>
  //         <Curr>PTE</Curr>
  //         <Curr>ROL</Curr>
  //         <Curr>SDP</Curr>
  //         <Curr>SIT</Curr>
  //         <Curr>SKK</Curr>
  //         <Curr>SUR</Curr>
  //         <Curr>VND</Curr>
  //         <Curr>XEU</Curr>
  //         <Curr>XTR</Curr>
  //         <Curr>YUD</Curr>
  //     </Currencies>
  // </MNBCurrencies>
  // 
}