(Swift 3,4,5...) SOAP with MTOM XOP Attachment

Demonstrates how to send the following sample SOAP request with an MTOM/XOP attachment:

Content-Type: Multipart/Related; start-info="text/xml"; type="application/xop+xml"; boundary="----=_Part_0_1744155.1118953559416"
Content-Length: 3453
SOAPAction: "some-SOAP-action"

------=_Part_1_4558657.1118953559446
Content-Type: application/xop+xml; type="text/xml"; charset=utf-8

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <Detail xmlns="http://example.org/mtom/data">
      <image>
        <xop:Include xmlns:xop="http://www.w3.org/2004/08/xop/include" href="cid:5aeaa450-17f0-4484-b845-a8480c363444@example.org" />
      </image>
    </Detail>
  </soap:Body>
</soap:Envelope>

------=_Part_1_4558657.1118953559446
Content-Type: image/jpeg
Content-ID: <5aeaa450-17f0-4484-b845-a8480c363444@example.org>


... binary data ...

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

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

    let http = CkoHttp()!

    let soapXml = CkoXml()!

    soapXml.tag = "soap:Envelope"
    var success: Bool = soapXml.addAttribute("xmlns:soap", value: "http://schemas.xmlsoap.org/soap/envelope/")

    soapXml.newChild2("soap:Body", content: "")
    success = soapXml.getChild2(0)

    soapXml.newChild2("Detail", content: "")
    success = soapXml.getChild2(0)
    success = soapXml.addAttribute("xmlns", value: "http://example.org/mtom/data")

    soapXml.newChild2("image", content: "")
    success = soapXml.getChild2(0)

    soapXml.newChild2("xop:Include", content: "")
    success = soapXml.getChild2(0)
    success = soapXml.addAttribute("xmlns:xop", value: "http://www.w3.org/2004/08/xop/include")
    success = soapXml.addAttribute("href", value: "cid:5aeaa450-17f0-4484-b845-a8480c363444@example.org")

    soapXml.getRoot2()
    soapXml.emitXmlDecl = false

    var xmlBody: String? = soapXml.getXml()
    print("\(xmlBody!)")

    let req = CkoHttpRequest()!
    req.httpVerb = "POST"
    req.path = "/something/someTarget"

    req.contentType = "multipart/related; start-info=\"text/xml\"; type=\"application/xop+xml\""
    req.addHeader("SOAPAction", value: "some-SOAP-action")

    success = req.addString(forUpload2: "", filename: "", strData: xmlBody, charset: "utf-8", contentType: "application/xop+xml; type=\"text/xml\"; charset=utf-8")

    // The bytes will be sent as binary (not base64 encoded).
    success = req.addFile(forUpload2: "", path: "qa_data/jpg/starfish.jpg", contentType: "image/jpeg")

    // The JPEG data is the 2nd sub-part, and therefore is at index 1 (the first sub-part is at index 0)
    success = req.addSubHeader(1, name: "Content-ID", value: "<5aeaa450-17f0-4484-b845-a8480c363444@example.org>")

    http.followRedirects = true

    // For debugging, set the SessionLogFilename property
    // to see the exact HTTP request and response in a log file.
    // (Given that the request contains binary data, you'll need an editor
    // that can gracefully view text + binary data.  I use EmEditor for most simple editing tasks..)
    http.sessionLogFilename = "qa_output/mtom_sessionLog.txt"

    var useTls: Bool = true
    // Note: Please don't run this example without changing the domain to your own domain...
    var resp: CkoHttpResponse? = http.synchronousRequest("www.example.org", port: 443, ssl: useTls, req: req)
    if http.lastMethodSuccess != true {
        print("\(http.lastErrorText!)")
        return
    }

    let xmlResponse = CkoXml()!
    success = xmlResponse.load(resp!.bodyStr)
    print("\(xmlResponse.getXml()!)")
    resp = nil

}