(PureBasic) 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.

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkStringBuilder.pb"
IncludeFile "CkXml.pb"
IncludeFile "CkRest.pb"

Procedure ChilkatExample()

    rest.i = CkRest::ckCreate()
    If rest.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success.i

    ; URL: http://www.mnb.hu/arfolyamok.asmx
    bTls.i = 0
    port.i = 80
    bAutoReconnect.i = 1
    success = CkRest::ckConnect(rest,"www.mnb.hu",port,bTls,bAutoReconnect)
    If success <> 1
        Debug "ConnectFailReason: " + Str(CkRest::ckConnectFailReason(rest))
        Debug CkRest::ckLastErrorText(rest)
        CkRest::ckDispose(rest)
        ProcedureReturn
    EndIf

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

    xml.i = CkXml::ckCreate()
    If xml.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkXml::setCkTag(xml, "soapenv:Envelope")
    CkXml::ckAddAttribute(xml,"xmlns:soapenv","http://schemas.xmlsoap.org/soap/envelope/")
    CkXml::ckAddAttribute(xml,"xmlns:web","http://www.mnb.hu/webservices/")
    CkXml::ckUpdateChildContent(xml,"soapenv:Header","")
    CkXml::ckUpdateChildContent(xml,"soapenv:Body|web:GetCurrencies","")

    CkRest::ckAddHeader(rest,"Content-Type","text/xml")
    CkRest::ckAddHeader(rest,"SOAPAction","/webservices/MNBArfolyamServiceSoap/GetCurrencies")
    CkRest::ckAddHeader(rest,"Accept","application/xml")

    sbRequestBody.i = CkStringBuilder::ckCreate()
    If sbRequestBody.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkXml::ckGetXmlSb(xml,sbRequestBody)
    sbResponseBody.i = CkStringBuilder::ckCreate()
    If sbResponseBody.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkRest::ckFullRequestSb(rest,"POST","/arfolyamok.asmx",sbRequestBody,sbResponseBody)
    If success <> 1
        Debug CkRest::ckLastErrorText(rest)
        CkRest::ckDispose(rest)
        CkXml::ckDispose(xml)
        CkStringBuilder::ckDispose(sbRequestBody)
        CkStringBuilder::ckDispose(sbResponseBody)
        ProcedureReturn
    EndIf

    respStatusCode.i = CkRest::ckResponseStatusCode(rest)
    If respStatusCode >= 400
        Debug "Response Status Code = " + Str(respStatusCode)
        Debug "Response Header:"
        Debug CkRest::ckResponseHeader(rest)
        Debug "Response Body:"
        Debug CkStringBuilder::ckGetAsString(sbResponseBody)
        CkRest::ckDispose(rest)
        CkXml::ckDispose(xml)
        CkStringBuilder::ckDispose(sbRequestBody)
        CkStringBuilder::ckDispose(sbResponseBody)
        ProcedureReturn
    EndIf

    Debug "response status code = " + Str(respStatusCode)

    xmlResponse.i = CkXml::ckCreate()
    If xmlResponse.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkXml::ckLoadSb(xmlResponse,sbResponseBody,1)
    Debug CkXml::ckGetXml(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.s = CkXml::ckGetChildContent(xmlResponse,"s:Body|GetCurrenciesResponse|GetCurrenciesResult")
    Debug resultEncoded

    ; Entity decode the result to get XML.
    sbResult.i = CkStringBuilder::ckCreate()
    If sbResult.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkStringBuilder::ckAppend(sbResult,resultEncoded)
    CkStringBuilder::ckEntityDecode(sbResult)

    ; Load it into XML.
    xmlResult.i = CkXml::ckCreate()
    If xmlResult.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkXml::ckLoadSb(xmlResult,sbResult,1)
    Debug CkXml::ckGetXml(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::ckDispose(rest)
    CkXml::ckDispose(xml)
    CkStringBuilder::ckDispose(sbRequestBody)
    CkStringBuilder::ckDispose(sbResponseBody)
    CkXml::ckDispose(xmlResponse)
    CkStringBuilder::ckDispose(sbResult)
    CkXml::ckDispose(xmlResult)


    ProcedureReturn
EndProcedure