forked from cozy/cozy-stack
/
thumbs.go
165 lines (149 loc) · 3.5 KB
/
thumbs.go
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package vfsafero
import (
"fmt"
"io"
"net/http"
"os"
"path"
"github.com/cozy/cozy-stack/model/vfs"
"github.com/cozy/cozy-stack/pkg/consts"
multierror "github.com/hashicorp/go-multierror"
"github.com/spf13/afero"
)
// NewThumbsFs creates a new thumb filesystem base on a afero.Fs.
func NewThumbsFs(fs afero.Fs) vfs.Thumbser {
return &thumbs{fs}
}
type thumbs struct {
fs afero.Fs
}
type thumb struct {
afero.File
fs afero.Fs
tmpname string
newname string
}
func (t *thumb) Abort() error {
return t.fs.Remove(t.tmpname)
}
func (t *thumb) Commit() error {
return t.fs.Rename(t.tmpname, t.newname)
}
func (t *thumbs) CreateThumb(img *vfs.FileDoc, format string) (vfs.ThumbFiler, error) {
newname := t.makeName(img.ID(), format)
dir := path.Dir(newname)
if base := dir; base != "." {
if err := t.fs.MkdirAll(dir, 0755); err != nil {
return nil, err
}
}
f, err := afero.TempFile(t.fs, dir, "cozy-thumb")
if err != nil {
return nil, err
}
tmpname := f.Name()
th := &thumb{
File: f,
fs: t.fs,
tmpname: tmpname,
newname: newname,
}
return th, nil
}
func (t *thumbs) RemoveThumbs(img *vfs.FileDoc, formats []string) error {
var errm error
for _, format := range formats {
if err := t.fs.Remove(t.makeName(img.ID(), format)); err != nil && !os.IsNotExist(err) {
errm = multierror.Append(errm, err)
}
}
return errm
}
func (t *thumbs) ThumbExists(img *vfs.FileDoc, format string) (bool, error) {
name := t.makeName(img.ID(), format)
infos, err := t.fs.Stat(name)
if os.IsNotExist(err) {
return false, nil
}
if err != nil {
return false, err
}
return infos.Size() > 0, nil
}
func (t *thumbs) ServeThumbContent(w http.ResponseWriter, req *http.Request,
img *vfs.FileDoc, format string) error {
name := t.makeName(img.ID(), format)
s, err := t.fs.Stat(name)
if err != nil {
return err
}
f, err := t.fs.Open(name)
if err != nil {
return err
}
defer f.Close()
http.ServeContent(w, req, name, s.ModTime(), f)
return nil
}
func (t *thumbs) CreateNoteThumb(id, mime, format string) (vfs.ThumbFiler, error) {
newname := t.makeName(id, format)
dir := path.Dir(newname)
if base := dir; base != "." {
if err := t.fs.MkdirAll(dir, 0755); err != nil {
return nil, err
}
}
f, err := afero.TempFile(t.fs, dir, "note-thumb")
if err != nil {
return nil, err
}
tmpname := f.Name()
th := &thumb{
File: f,
fs: t.fs,
tmpname: tmpname,
newname: newname,
}
return th, nil
}
func (t *thumbs) OpenNoteThumb(id, format string) (io.ReadCloser, error) {
name := t.makeName(id, format)
return t.fs.Open(name)
}
func (t *thumbs) RemoveNoteThumb(id string, formats []string) error {
var errm error
for _, format := range formats {
err := t.fs.Remove(t.makeName(id, format))
if err != nil && !os.IsNotExist(err) {
errm = multierror.Append(errm, err)
}
}
return errm
}
func (t *thumbs) ServeNoteThumbContent(w http.ResponseWriter, req *http.Request, id string) error {
name := t.makeName(id, consts.NoteImageThumbFormat)
s, err := t.fs.Stat(name)
if err != nil {
name = t.makeName(id, consts.NoteImageOriginalFormat)
s, err = t.fs.Stat(name)
if err != nil {
return err
}
}
f, err := t.fs.Open(name)
if err != nil {
return err
}
defer f.Close()
http.ServeContent(w, req, name, s.ModTime(), f)
return nil
}
func (t *thumbs) makeName(imgID string, format string) string {
dir := imgID[:4]
ext := ".jpg"
if format == consts.NoteImageOriginalFormat {
ext = ""
}
name := fmt.Sprintf("%s-%s%s", imgID, format, ext)
return path.Join("/", dir, name)
}