upload package to aem server in golang

upload-package-to-aem.go

/*
Packages can be uploaded via CURL as specified in this document:
https://experienceleague.adobe.com/docs/experience-manager-65/administering/operations/curl.html?lang=en#user-management

$ curl -u <user>:<password> -F cmd=upload -F force=true -F [email protected] http://localhost:4502/crx/packmgr/service/.json

This is how it can be done in Golang, please note I've removed all error checking for brevity.
*/

import (
	"bytes"
	"encoding/base64"
	"encoding/json"
	"errors"
	"io/ioutil"
	"mime/multipart"
	"net/http"
	"net/url"
	"os"
	"path"
)

type AemServer struct{}

type aemResp struct {
	Success bool   `json:"success"`
	Msg     string `json:"msg"`
	Path    string `json:"path"`
}

func (srv *AemServer) UploadPackage(server, pkg, username, password string) (*string, error) {
	auth := username + ":" + password
	b64 := base64.StdEncoding.EncodeToString([]byte(auth))
	u, _ := url.Parse(server)
	u.Path = path.Join(u.Path, "crx/packmgr/service/.json")

	file, _ := os.Open(pkg) //open the package (.zip) file
	fileContents, _ := ioutil.ReadAll(file)
	fi, _ := file.Stat()
	defer file.Close()

	body := new(bytes.Buffer)
	writer := multipart.NewWriter(body)
	part, _ := writer.CreateFormFile("package", fi.Name())
	part.Write(fileContents)

	_ = writer.WriteField("cmd", "upload")
	_ = writer.WriteField("force", "true")
	_ = writer.Close()

	req, _ := http.NewRequest("POST", u.String(), body)
	req.Header.Add("Authorization", "Basic "+b64)
	req.Header.Set("Content-Type", writer.FormDataContentType())

	client := &http.Client{}
	resp, _ := client.Do(req)
	bodyBytes, _ := ioutil.ReadAll(resp.Body)
	var aemr aemResp
	_ = json.Unmarshal(bodyBytes, &aemr)
	if !aemr.Success {
		return nil, errors.New(aemr.Msg)
	}

	return &aemr.Path, nil
}