(Go) Send SOAP multipart/related with XML Body and Zip Attachment

Demonstrates how to construct and send a multipart/related POST containing a SOAP XML body and a binary zip attachment.

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

    // This example constructs and sends the following HTTP request.
    // (The boundary strings will be different and auto-generated by Chilkat)

    // Accept-Encoding: gzip,deflate
    // SOAPAction: invio
    // Content-Type: Multipart/Related; boundary="MIME_boundary"; type="text/xml"; start="mailto:rootpart@soapui.org"
    // MIME-Version: 1.0
    // 
    // --MIME_boundary
    // Content-Type: text/xml; charset=UTF-8
    // Content-Transfer-Encoding: 8bit
    // Content-ID: <rootpart@soapui.org>
    //  
    // <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:urn="urn:attachment.ws.it">
    // <soapenv:Header/>
    // <soapenv:Body>
    //   <urn:inputBean>
    //    <nomeFileAllegato>myfile.zip</nomeFileAllegato>
    //   </urn:inputBean>
    // </soapenv:Body>
    // </soapenv:Envelope>
    //  
    // --MIME_boundary
    // Content-Type: application/zip
    // Content-Transfer-Encoding: binary
    // Content-ID: <myfile.zip>
    // Content-Disposition: attachment; name="myfile.zip"; filename="myfile.zip"
    // 
    // ... binary zip data goes here ...
    // --MIME_boundary--
    // 

    rest := chilkat.NewRest()
    var success bool

    rest.AddHeader("Accept-Encoding","gzip,deflate")
    rest.AddHeader("SOAPAction","invio")
    rest.AddHeader("Content-Type","Multipart/Related; boundary=\"MIME_boundary\"; type=\"text/xml\"; start=\"mailto:rootpart@soapui.org\"")
    rest.AddHeader("MIME-Version","1.0")

    // Build the SOAP XML:
    // Use this online tool to generate the code from sample XML: 
    // Generate Code to Create XML

    xml := chilkat.NewXml()
    xml.SetTag("soapenv:Envelope")
    xml.AddAttribute("xmlns:soapenv","http://schemas.xmlsoap.org/soap/envelope/")
    xml.AddAttribute("xmlns:urn","urn:attachment.ws.it")
    xml.UpdateChildContent("soapenv:Header","")
    xml.UpdateChildContent("soapenv:Body|urn:inputBean|nomeFileAllegato","myfile.zip")

    // Build the SOAP XML sub-part
    rest.SetPartSelector("1")
    rest.AddHeader("Content-Type","text/xml; charset=UTF-8")
    rest.AddHeader("Content-Transfer-Encoding","8bit")
    rest.AddHeader("Content-ID","<rootpart@soapui.org>")
    success = rest.SetMultipartBodyString(*xml.GetXml())

    // Build the sub-part containing the .zip
    rest.SetPartSelector("2")
    rest.AddHeader("Content-Type","application/zip")
    rest.AddHeader("Content-Transfer-Encoding","binary")
    rest.AddHeader("Content-ID","<myfile.zip>")
    rest.AddHeader("Content-Disposition","attachment; name=\"myfile.zip\"; filename=\"myfile.zip\"")

    // Add a zip file to the 2nd sub-part body.
    // This example will load the .zip file into memory, but it is also possible to stream directly from the file as the request is sent
    // by calling SetMultipartBodyStream.
    bd := chilkat.NewBinData()
    success = bd.LoadFile("qa_data/zips/helloWorld.zip")
    success = rest.SetMultipartBodyBd(bd)

    // To be safe, always revert the PartSelector back to 0..
    rest.SetPartSelector("0")

    // Send the request by connecting to the web server and then sending..
    // Connect using TLS.
    bAutoReconnect := true
    success = rest.Connect("www.chilkatsoft.com",443,true,bAutoReconnect)
    if success != true {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        xml.DisposeXml()
        bd.DisposeBinData()
        return
    }

    // In this example, we're setting DebugMode.
    // When debug mode is turned on, no request is actually sent.
    // Instead, the request that would be sent is recorded to memory
    // and we can retrieve it afterwards..
    rest.SetDebugMode(true)

    responseStr := rest.FullRequestMultipart("POST","/someTargetPath")
    if rest.LastMethodSuccess() != true {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        xml.DisposeXml()
        bd.DisposeBinData()
        return
    }

    // Retrieve the request that would've been sent and save it to a file.
    // We can then examine the file to see if the request was structured as we desired.
    // (Note: The zip bytes will be binary data and will appear as garbled garbage in a text editor..)
    bdRequest := chilkat.NewBinData()
    rest.GetLastDebugRequest(bdRequest)
    success = bdRequest.WriteFile("qa_output/multipartRelatedRequest.bin")

    fmt.Println("OK, examine the output file..")

    rest.DisposeRest()
    xml.DisposeXml()
    bd.DisposeBinData()
    bdRequest.DisposeBinData()