Show namespace prefix in xml.Marshall in go-CodePudding

I'm working on generating a SOAP message(xml) from golang. I have the following example.

package main

import (
    "encoding/xml"
    "fmt"
)

type Envelope struct {
    XMLName xml.Name `xml:"Envelope"`
}

func main() {
    envelope := Envelope{
        XMLName: xml.Name{
            Local: "soapenv",
            Space: "http://www.w3.org/2003/05/soap-envelope",
        },
    }
    res, _ := xml.Marshal(envelope)
    fmt.Print(string(res))
}

This program prints the output as follows

<Envelope></Envelope>

I want to get the output with namespace prefix as below,

<soapenv:Envelope xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope"></soapenv:Envelope>

Can someone help me to get my desired output??

CodePudding user response：

You can add the xmlns attribute explicitly to your struct definition:

type Envelope struct {
    XMLName xml.Name `xml:"soapenv:Envelope"`
    SoapEnv string   `xml:"xmlns:soapenv,attr"`
}

and then to instantiate it:

e := Envelope{
    SoapEnv: "http://www.w3.org/2003/05/soap-envelope",
}

https://go.dev/play/p/LrKNg8PTK2A

Output:

<soapenv:Envelope xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope"></soapenv:Envelope>

See XML docs example for more XML customizations.