(Java) Magyar Nemzeti Bank (MNB) Get Currencies

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.

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import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    CkRest rest = new CkRest();
    boolean success;

    // URL: http://www.mnb.hu/arfolyamok.asmx
    boolean bTls = false;
    int port = 80;
    boolean bAutoReconnect = true;
    success = rest.Connect("www.mnb.hu",port,bTls,bAutoReconnect);
    if (success != true) {
        System.out.println("ConnectFailReason: " + rest.get_ConnectFailReason());
        System.out.println(rest.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.
    // --------------------------------------------------------------------------------

    CkXml xml = new CkXml();
    xml.put_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");

    CkStringBuilder sbRequestBody = new CkStringBuilder();
    xml.GetXmlSb(sbRequestBody);
    CkStringBuilder sbResponseBody = new CkStringBuilder();
    success = rest.FullRequestSb("POST","/arfolyamok.asmx",sbRequestBody,sbResponseBody);
    if (success != true) {
        System.out.println(rest.lastErrorText());
        return;
        }

    int respStatusCode = rest.get_ResponseStatusCode();
    if (respStatusCode >= 400) {
        System.out.println("Response Status Code = " + respStatusCode);
        System.out.println("Response Header:");
        System.out.println(rest.responseHeader());
        System.out.println("Response Body:");
        System.out.println(sbResponseBody.getAsString());
        return;
        }

    System.out.println("response status code = " + respStatusCode);

    CkXml xmlResponse = new CkXml();
    xmlResponse.LoadSb(sbResponseBody,true);
    System.out.println(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
    String resultEncoded = xmlResponse.getChildContent("s:Body|GetCurrenciesResponse|GetCurrenciesResult");
    System.out.println(resultEncoded);

    // Entity decode the result to get XML.
    CkStringBuilder sbResult = new CkStringBuilder();
    sbResult.Append(resultEncoded);
    sbResult.EntityDecode();

    // Load it into XML.
    CkXml xmlResult = new CkXml();
    xmlResult.LoadSb(sbResult,true);
    System.out.println(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>
    // 
  }
}