(Ruby) 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 Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

rest = Chilkat::CkRest.new()

# URL: http://www.mnb.hu/arfolyamok.asmx
bTls = false
port = 80
bAutoReconnect = true
success = rest.Connect("www.mnb.hu",port,bTls,bAutoReconnect)
if (success != true)
    print "ConnectFailReason: " + rest.get_ConnectFailReason().to_s() + "\n";
    print rest.lastErrorText() + "\n";
    exit
end

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

xml = Chilkat::CkXml.new()
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")

sbRequestBody = Chilkat::CkStringBuilder.new()
xml.GetXmlSb(sbRequestBody)
sbResponseBody = Chilkat::CkStringBuilder.new()
success = rest.FullRequestSb("POST","/arfolyamok.asmx",sbRequestBody,sbResponseBody)
if (success != true)
    print rest.lastErrorText() + "\n";
    exit
end

respStatusCode = rest.get_ResponseStatusCode()
if (respStatusCode >= 400)
    print "Response Status Code = " + respStatusCode.to_s() + "\n";
    print "Response Header:" + "\n";
    print rest.responseHeader() + "\n";
    print "Response Body:" + "\n";
    print sbResponseBody.getAsString() + "\n";
    exit
end

print "response status code = " + respStatusCode.to_s() + "\n";

xmlResponse = Chilkat::CkXml.new()
xmlResponse.LoadSb(sbResponseBody,true)
print xmlResponse.getXml() + "\n";

# 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 = xmlResponse.getChildContent("s:Body|GetCurrenciesResponse|GetCurrenciesResult")
print resultEncoded + "\n";

# Entity decode the result to get XML.
sbResult = Chilkat::CkStringBuilder.new()
sbResult.Append(resultEncoded)
sbResult.EntityDecode()

# Load it into XML.
xmlResult = Chilkat::CkXml.new()
xmlResult.LoadSb(sbResult,true)
print xmlResult.getXml() + "\n";

# 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>
#