Dropbox ListFolderLongPoll example with no HTTP Authorization header

dropbox_poll.go

package dropbox

import (
	"log"
	"net/http"

	"github.com/dropbox/dropbox-sdk-go-unofficial/dropbox"
	"github.com/dropbox/dropbox-sdk-go-unofficial/dropbox/files"
)

type noauthTransport struct {
	http.Transport
}

func (t *noauthTransport) RoundTrip(req *http.Request) (*http.Response, error) {
	req.Header.Del("Authorization")
	return t.Transport.RoundTrip(req)
}

func newNoAuthClient() *http.Client {
	return &http.Client{
		Transport: &noauthTransport{},
	}
}

func FolderPoll(folderPath string) error {
	config := dropbox.Config{
		Token: "your secret",
	}
	dbx := files.New(config)
	reqListFolder := files.NewListFolderArg(folderPath)
	res, err := dbx.ListFolder(reqListFolder)
	if err != nil {
		return err
	}
	cursor := res.Cursor
	log.Printf("Start to poll '%s'", folderPath)
	for {
		noauthdbx := files.New(dropbox.Config{Client: newNoAuthClient()})
		req := files.NewListFolderLongpollArg(cursor)
		res, err := noauthdbx.ListFolderLongpoll(req)
		if err != nil {
			return err
		}
		if !res.Changes {
			continue
		}
		log.Print("There is a change")
		res2, err := dbx.ListFolderGetLatestCursor(reqListFolder)
		if err != nil {
			return err
		}
		cursor = res2.Cursor
	}
	return nil
}