(C) 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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#include <C_CkRest.h>
#include <C_CkXml.h>
#include <C_CkStringBuilder.h>

void ChilkatSample(void)
    {
    HCkRest rest;
    BOOL success;
    BOOL bTls;
    int port;
    BOOL bAutoReconnect;
    HCkXml xml;
    HCkStringBuilder sbRequestBody;
    HCkStringBuilder sbResponseBody;
    int respStatusCode;
    HCkXml xmlResponse;
    const char *resultEncoded;
    HCkStringBuilder sbResult;
    HCkXml xmlResult;

    rest = CkRest_Create();

    // URL: http://www.mnb.hu/arfolyamok.asmx
    bTls = FALSE;
    port = 80;
    bAutoReconnect = TRUE;
    success = CkRest_Connect(rest,"www.mnb.hu",port,bTls,bAutoReconnect);
    if (success != TRUE) {
        printf("ConnectFailReason: %d\n",CkRest_getConnectFailReason(rest));
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        return;
    }

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

    xml = CkXml_Create();
    CkXml_putTag(xml,"soapenv:Envelope");
    CkXml_AddAttribute(xml,"xmlns:soapenv","http://schemas.xmlsoap.org/soap/envelope/");
    CkXml_AddAttribute(xml,"xmlns:web","http://www.mnb.hu/webservices/");
    CkXml_UpdateChildContent(xml,"soapenv:Header","");
    CkXml_UpdateChildContent(xml,"soapenv:Body|web:GetCurrencies","");

    CkRest_AddHeader(rest,"Content-Type","text/xml");
    CkRest_AddHeader(rest,"SOAPAction","/webservices/MNBArfolyamServiceSoap/GetCurrencies");
    CkRest_AddHeader(rest,"Accept","application/xml");

    sbRequestBody = CkStringBuilder_Create();
    CkXml_GetXmlSb(xml,sbRequestBody);
    sbResponseBody = CkStringBuilder_Create();
    success = CkRest_FullRequestSb(rest,"POST","/arfolyamok.asmx",sbRequestBody,sbResponseBody);
    if (success != TRUE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        CkXml_Dispose(xml);
        CkStringBuilder_Dispose(sbRequestBody);
        CkStringBuilder_Dispose(sbResponseBody);
        return;
    }

    respStatusCode = CkRest_getResponseStatusCode(rest);
    if (respStatusCode >= 400) {
        printf("Response Status Code = %d\n",respStatusCode);
        printf("Response Header:\n");
        printf("%s\n",CkRest_responseHeader(rest));
        printf("Response Body:\n");
        printf("%s\n",CkStringBuilder_getAsString(sbResponseBody));
        CkRest_Dispose(rest);
        CkXml_Dispose(xml);
        CkStringBuilder_Dispose(sbRequestBody);
        CkStringBuilder_Dispose(sbResponseBody);
        return;
    }

    printf("response status code = %d\n",respStatusCode);

    xmlResponse = CkXml_Create();
    CkXml_LoadSb(xmlResponse,sbResponseBody,TRUE);
    printf("%s\n",CkXml_getXml(xmlResponse));

    // 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
    resultEncoded = CkXml_getChildContent(xmlResponse,"s:Body|GetCurrenciesResponse|GetCurrenciesResult");
    printf("%s\n",resultEncoded);

    // Entity decode the result to get XML.
    sbResult = CkStringBuilder_Create();
    CkStringBuilder_Append(sbResult,resultEncoded);
    CkStringBuilder_EntityDecode(sbResult);

    // Load it into XML.
    xmlResult = CkXml_Create();
    CkXml_LoadSb(xmlResult,sbResult,TRUE);
    printf("%s\n",CkXml_getXml(xmlResult));

    // 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>
    // 


    CkRest_Dispose(rest);
    CkXml_Dispose(xml);
    CkStringBuilder_Dispose(sbRequestBody);
    CkStringBuilder_Dispose(sbResponseBody);
    CkXml_Dispose(xmlResponse);
    CkStringBuilder_Dispose(sbResult);
    CkXml_Dispose(xmlResult);

    }