Simple blogging system written in Go https://goblog.app
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package main
import (
"errors"
"fmt"
"io"
"os"
"path/filepath"
"strings"
"time"
"github.com/jlaffaye/ftp"
)
type mediaStorageSaveFunc func(filename string, file io.Reader) (location string, err error)
func (a *goBlog) saveMediaFile(filename string, f io.Reader) (string, error) {
a.mediaStorageInit.Do(func() {
type initFunc func() mediaStorage
for _, fc := range []initFunc{a.initBunnyCdnMediaStorage, a.initFtpMediaStorage, a.initLocalMediaStorage} {
a.mediaStorage = fc()
if a.mediaStorage != nil {
break
}
}
})
if a.mediaStorage == nil {
return "", errors.New("no media storage configured")
}
loc, err := a.mediaStorage.save(filename, f)
if err != nil {
return "", err
}
return a.getFullAddress(loc), nil
}
type mediaStorage interface {
save(filename string, file io.Reader) (location string, err error)
}
type localMediaStorage struct {
mediaURL string // optional
path string // required
}
func (a *goBlog) initLocalMediaStorage() mediaStorage {
ms := &localMediaStorage{
path: mediaFilePath,
}
if config := a.cfg.Micropub.MediaStorage; config != nil && config.MediaURL != "" {
ms.mediaURL = config.MediaURL
}
return ms
}
func (l *localMediaStorage) save(filename string, file io.Reader) (location string, err error) {
if err = os.MkdirAll(l.path, 0644); err != nil {
return "", err
}
newFile, err := os.Create(filepath.Join(l.path, filename))
if err != nil {
return "", err
}
if _, err = io.Copy(newFile, file); err != nil {
return "", err
}
if l.mediaURL != "" {
return fmt.Sprintf("%s/%s", l.mediaURL, filename), nil
}
return fmt.Sprintf("/m/%s", filename), nil
}
func (a *goBlog) initBunnyCdnMediaStorage() mediaStorage {
config := a.cfg.Micropub.MediaStorage
if config == nil || config.BunnyStorageName == "" || config.BunnyStorageKey == "" || config.MediaURL == "" {
return nil
}
address := "storage.bunnycdn.com:21"
if config.BunnyStorageRegion != "" {
address = fmt.Sprintf("%s.%s", strings.ToLower(config.BunnyStorageRegion), address)
}
return &ftpMediaStorage{
address: address,
user: config.BunnyStorageName,
password: config.BunnyStorageKey,
mediaURL: config.MediaURL,
}
}
type ftpMediaStorage struct {
address string // required
user string // required
password string // required
mediaURL string // required
}
func (a *goBlog) initFtpMediaStorage() mediaStorage {
config := a.cfg.Micropub.MediaStorage
if config == nil || config.FTPAddress == "" || config.FTPUser == "" || config.FTPPassword == "" {
return nil
}
return &ftpMediaStorage{
address: config.FTPAddress,
user: config.FTPUser,
password: config.FTPPassword,
mediaURL: config.MediaURL,
}
}
func (f *ftpMediaStorage) save(filename string, file io.Reader) (location string, err error) {
if f.address == "" || f.user == "" || f.password == "" {
return "", errors.New("missing FTP config")
}
c, err := ftp.Dial(f.address, ftp.DialWithTimeout(5*time.Second))
if err != nil {
return "", err
}
defer func() {
_ = c.Quit()
}()
if err = c.Login(f.user, f.password); err != nil {
return "", err
}
if err = c.Stor(filename, file); err != nil {
return "", err
}
return fmt.Sprintf("%s/%s", f.mediaURL, filename), nil
}