xml code

package main

import (
  "fmt"
  "strings"
  "net/http"
  "io/ioutil"
)

func main() {

  url := "https://posgateway.cert.secureexchange.net/Hps.Exchange.PosGateway/POSGatewayService.asmx"
  method := "POST"

  payload := strings.NewReader(`<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:hps="http://Hps.Exchange.PosGateway">
	<soapenv:Header/>
	<soapenv:Body>
		<hps:PosRequest>
			<hps:Ver1.0>
				<hps:Header>
					<hps:LicenseId>${#Project#LicenseID-Retail}</hps:LicenseId>
					<hps:SiteId>${#Project#SiteID-Retail}</hps:SiteId>
					<hps:DeviceId>${#Project#DeviceID-Retail}</hps:DeviceId>
					<hps:UserName>${#Project#UserName-Retail}</hps:UserName>
					<hps:Password>${#Project#Password}</hps:Password>
					<hps:SiteTrace>${#Project#SiteTrace}</hps:SiteTrace>
					<hps:DeveloperID>${#Project#DeveloperID}</hps:DeveloperID>
					<hps:VersionNbr>${#Project#VersionNbr}</hps:VersionNbr>
					<hps:ClerkID>${#Project#ClerkID}</hps:ClerkID>
				</hps:Header>
				<hps:Transaction>
					<hps:CreditAuth>
						<hps:Block1>
							<hps:CardData>
								<hps:TrackData method="swipe">${#Project#VISA_EMV_TRACK2}</hps:TrackData>
							</hps:CardData>
							<hps:Amt>25.00</hps:Amt>
							<hps:AllowDup>Y</hps:AllowDup>
							<hps:TagData>
								<hps:TagValues source="chip">${#Project#VISA_EMV_TAGS_ONLINE}</hps:TagValues>
							</hps:TagData>
						</hps:Block1>
					</hps:CreditAuth>
				</hps:Transaction>
			</hps:Ver1.0>
		</hps:PosRequest>
	</soapenv:Body>
</soapenv:Envelope>`)

  client := &http.Client {
  }
  req, err := http.NewRequest(method, url, payload)

  if err != nil {
    fmt.Println(err)
    return
  }
  req.Header.Add("Content-Type", "application/xml")

  res, err := client.Do(req)
  if err != nil {
    fmt.Println(err)
    return
  }
  defer res.Body.Close()

  body, err := ioutil.ReadAll(res.Body)
  if err != nil {
    fmt.Println(err)
    return
  }
  fmt.Println(string(body))
}