go_soap_example.go

package main

import (
	"encoding/xml"
	"fmt"
)

type getFileRequest struct {
	XMLName  struct{} `xml:"http://tempuri.org/ getFile"`
	User     string   `xml:"userName"`
	Password string   `xml:"passWord"`
	Filename string   `xml:"FileName"`
}

type getFileResponse struct {
	XMLName struct{} `xml:"http://tempuri.org/ getFileResponse"`
	Result  string   `xml:"getFileResult"`
}

type SoapEnvelope struct {
	XMLName struct{} `xml:"http://www.w3.org/2003/05/soap-envelope Envelope"`
	Body    SoapBody
}

type SoapBody struct {
	XMLName  struct{} `xml:"http://www.w3.org/2003/05/soap-envelope Body"`
	Contents []byte   `xml:",innerxml"`
}

const response = `<?xml version="1.0" encoding="utf-8"?>
<soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
	<soap12:Body>
		<getFileResponse xmlns="http://tempuri.org/">
			<getFileResult>fileContentsinHexFormat</getFileResult> //file contents in hex format
		</getFileResponse>
	</soap12:Body>
</soap12:Envelope>
`

func SoapEncode(contents interface{}) ([]byte, error) {
	data, err := xml.MarshalIndent(contents, "    ", "  ")
	if err != nil {
		return nil, err
	}
	data = append([]byte("\n"), data...)
	env := SoapEnvelope{Body: SoapBody{Contents: data}}
	return xml.MarshalIndent(&env, "", "  ")
}

func SoapDecode(data []byte, contents interface{}) error {
	env := SoapEnvelope{Body: SoapBody{}}
	err := xml.Unmarshal(data, &env)
	if err != nil {
		return err
	}
	return xml.Unmarshal(env.Body.Contents, contents)
}

func main() {
	req := &getFileRequest{User: "myusername", Password: "mypassword", Filename: "myfilename"}
	data, err := SoapEncode(&req)
	if err != nil {
		panic(err)
	}
	fmt.Println("Request:")
	fmt.Println(xml.Header + string(data))
	var resp getFileResponse
	err = SoapDecode([]byte(response), &resp)
	if err != nil {
		panic(err)
	}
	fmt.Println("Response:")
	fmt.Println(resp.Result)
}