B4X
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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Dim success As Boolean = False

Dim rest As ChilkatRest
rest.Initialize("rest")

'  URL: http://www.mnb.hu/arfolyamok.asmx
Dim bTls As Boolean = False
Dim port As Int = 80
Dim bAutoReconnect As Boolean = True
success = rest.Connect("www.mnb.hu", port, bTls, bAutoReconnect)
If success <> True Then
    Log("ConnectFailReason: " & rest.ConnectFailReason)
    Log(rest.LastErrorText)
    Return
End If


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

Dim xml As ChilkatXml
xml.Initialize
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")

Dim sbRequestBody As ChilkatStringBuilder
sbRequestBody.Initialize
xml.GetXmlSb(sbRequestBody)
Dim sbResponseBody As ChilkatStringBuilder
sbResponseBody.Initialize
success = rest.FullRequestSb("POST", "/arfolyamok.asmx", sbRequestBody, sbResponseBody)
If success <> True Then
    Log(rest.LastErrorText)
    Return
End If

Dim respStatusCode As Int = rest.ResponseStatusCode
If respStatusCode >= 400 Then
    Log("Response Status Code = " & respStatusCode)
    Log("Response Header:")
    Log(rest.ResponseHeader)
    Log("Response Body:")
    Log(sbResponseBody.GetAsString)
    Return
End If


Log("response status code = " & respStatusCode)

Dim xmlResponse As ChilkatXml
xmlResponse.Initialize
xmlResponse.LoadSb(sbResponseBody, True)
Log(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
Dim resultEncoded As String = xmlResponse.GetChildContent("s:Body|GetCurrenciesResponse|GetCurrenciesResult")
Log(resultEncoded)

'  Entity decode the result to get XML.
Dim sbResult As ChilkatStringBuilder
sbResult.Initialize
sbResult.Append(resultEncoded)
sbResult.EntityDecode

'  Load it into XML.
Dim xmlResult As ChilkatXml
xmlResult.Initialize
xmlResult.LoadSb(sbResult, True)
Log(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>
'