(Swift 3,4,5...) SOAP Web Service (HTTP POST)

Demonstrates how to call PostXml to call a SOAP web service.

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func chilkatTest() {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

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

    // This example uses a live web service at:
    // http://www.webservicex.net/uklocation.asmx
    // It gets the UK town,Postcode and County by Postcode(First Section of Post Code)

    // The SOAP XML will look like this:
    // <?xml version="1.0" encoding="utf-8"?>
    // <soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
    //   <soap:Body>
    //     <GetUKLocationByPostCode xmlns="http://www.webserviceX.NET">
    //       <PostCode>string</PostCode>
    //     </GetUKLocationByPostCode>
    //   </soap:Body>
    // </soap:Envelope>

    // For this example's sake, we'll load the XML from a file.  We'll test using PostCode "E3".  
    // The SOAP XML for this example may be downloaded from:
    // http://www.chilkatsoft.com/testData/ukPostCodeSoap.xml
    let xml = CkoXml()!
    var success: Bool = xml.loadFile("ukPostCodeSoap.xml")
    if success != true {
        print("\(xml.lastErrorText!)")
        return
    }

    var strXml: String? = xml.getXml()

    var responseStatusCode: Int
    let http = CkoHttp()!

    // We'll need to add this in the HTTP header:
    // SOAPAction: "http://www.webserviceX.NET/GetUKLocationByPostCode"
    http.setRequestHeader("SOAPAction", value: "http://www.webserviceX.NET/GetUKLocationByPostCode")

    // Some services expect the content-type in the HTTP header to be "application/xml" while
    // other expect text/xml.  The default sent by Chilkat is "application/xml", but this web service
    // expects "text/xml".  Therefore, change the content-type:
    http.setRequestHeader("Content-Type", value: "text/xml; charset=utf-8")

    // The endpoint for this soap service is:
    var endPoint: String? = "http://www.webservicex.net/uklocation.asmx"

    // Note: This particular web service was live and functioning at the time this example
    // was written.  It is possible that as time progresses, this web service will no longer
    // be availble...
    var resp: CkoHttpResponse? = http.postXml(endPoint, xmlDoc: strXml, charset: "utf-8")
    if http.lastMethodSuccess != true {
        print("\(http.lastErrorText!)")
        print("LastHeader:")
        print("\(http.lastHeader!)")
        return
    }

    responseStatusCode = resp!.statusCode.intValue
    // You may wish to verify that the responseStatusCode equals 200...
    print("Response Status Code: \(responseStatusCode)")

    // You may examine the exact HTTP header sent with the POST like this:
    print("LastHeader:")
    print("\(http.lastHeader!)")

    // Examine the XML returned by the web service:
    print("XML Response:")
    let xmlResp = CkoXml()!
    xmlResp.load(resp!.bodyStr)
    print("\(xmlResp.getXml()!)")

    // Use this online tool to generate parsing code from response XML: 
    // Generate Parsing Code from XML

    resp = nil

}