(Objective-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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#import <CkoRest.h>
#import <CkoXml.h>
#import <CkoStringBuilder.h>
#import <NSString.h>

CkoRest *rest = [[CkoRest alloc] init];
BOOL success;

// URL: http://www.mnb.hu/arfolyamok.asmx
BOOL bTls = NO;
int port = 80;
BOOL bAutoReconnect = YES;
success = [rest Connect: @"www.mnb.hu" port: [NSNumber numberWithInt: port] tls: bTls autoReconnect: bAutoReconnect];
if (success != YES) {
    NSLog(@"%@%d",@"ConnectFailReason: ",[rest.ConnectFailReason intValue]);
    NSLog(@"%@",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.
// --------------------------------------------------------------------------------

CkoXml *xml = [[CkoXml alloc] init];
xml.Tag = @"soapenv:Envelope";
[xml AddAttribute: @"xmlns:soapenv" value: @"http://schemas.xmlsoap.org/soap/envelope/"];
[xml AddAttribute: @"xmlns:web" value: @"http://www.mnb.hu/webservices/"];
[xml UpdateChildContent: @"soapenv:Header" value: @""];
[xml UpdateChildContent: @"soapenv:Body|web:GetCurrencies" value: @""];

[rest AddHeader: @"Content-Type" value: @"text/xml"];
[rest AddHeader: @"SOAPAction" value: @"/webservices/MNBArfolyamServiceSoap/GetCurrencies"];
[rest AddHeader: @"Accept" value: @"application/xml"];

CkoStringBuilder *sbRequestBody = [[CkoStringBuilder alloc] init];
[xml GetXmlSb: sbRequestBody];
CkoStringBuilder *sbResponseBody = [[CkoStringBuilder alloc] init];
success = [rest FullRequestSb: @"POST" uriPath: @"/arfolyamok.asmx" requestBody: sbRequestBody responseBody: sbResponseBody];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

int respStatusCode = [rest.ResponseStatusCode intValue];
if (respStatusCode >= 400) {
    NSLog(@"%@%d",@"Response Status Code = ",respStatusCode);
    NSLog(@"%@",@"Response Header:");
    NSLog(@"%@",rest.ResponseHeader);
    NSLog(@"%@",@"Response Body:");
    NSLog(@"%@",[sbResponseBody GetAsString]);
    return;
}

NSLog(@"%@%d",@"response status code = ",respStatusCode);

CkoXml *xmlResponse = [[CkoXml alloc] init];
[xmlResponse LoadSb: sbResponseBody autoTrim: YES];
NSLog(@"%@",[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
NSString *resultEncoded = [xmlResponse GetChildContent: @"s:Body|GetCurrenciesResponse|GetCurrenciesResult"];
NSLog(@"%@",resultEncoded);

// Entity decode the result to get XML.
CkoStringBuilder *sbResult = [[CkoStringBuilder alloc] init];
[sbResult Append: resultEncoded];
[sbResult EntityDecode];

// Load it into XML.
CkoXml *xmlResult = [[CkoXml alloc] init];
[xmlResult LoadSb: sbResult autoTrim: YES];
NSLog(@"%@",[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>
//