feat(archive): add rar archive support

This commit is contained in:
Piotr Grabowski 2024-08-10 13:00:25 +02:00
parent 9262f1bc59
commit e056ee91f6
6 changed files with 170 additions and 2 deletions

View file

@ -64,7 +64,9 @@ func NewArchive(path string, pageCache *pagecache.PageCache, httpReferer string)
switch ext {
case "zip", "cbz":
return NewZip(path)
case "7z", "rar", "tar", "tgz", "gz", "tbz2", "cb7", "cbr", "cbt", "lha":
case "rar":
return NewRar(path)
case "7z", "tar", "tgz", "gz", "tbz2", "cb7", "cbr", "cbt", "lha":
return nil, errors.New("Archive type not supported, please unpack it first")
}

162
archive/rar.go Normal file
View file

@ -0,0 +1,162 @@
/*
* Copyright (c) 2013-2021 Utkan Güngördü <utkan@freeconsole.org>
* Copyright (c) 2021-2023 Piotr Grabowski
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package archive
import (
"errors"
"fmt"
"io"
"log"
"path/filepath"
"sort"
"github.com/fauu/gomicsv/pixbuf"
"github.com/gotk3/gotk3/gdk"
"github.com/nwaples/rardecode/v2"
)
type Rar struct {
files RarMembers // Sorted by name
reader *rardecode.ReadCloser
name string
}
type RarMember struct {
Header *rardecode.FileHeader
Offset int // in terms of files
}
type RarMembers []RarMember
func (p RarMembers) Len() int { return len(p) }
func (p RarMembers) Less(i, j int) bool { return strcmp(p[i].Header.Name, p[j].Header.Name, true) }
func (p RarMembers) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
// NewRar reads supported image filenames from a given rar archive and sorts them
func NewRar(name string) (*Rar, error) {
var err error
ar := new(Rar)
ar.name = filepath.Base(name)
ar.files = make([]RarMember, 0, MaxArchiveEntries)
ar.reader, err = rardecode.OpenReader(name)
if err != nil {
return nil, err
}
offsetAcc := -1
for {
offsetAcc += 1
header, err := ar.reader.Next()
if err != nil {
if err == io.EOF {
break
}
log.Printf("error reading a file inside the rar archive: %v", err)
}
if header.IsDir {
continue
}
if !extensionMatches(header.Name, imageExtensions) {
continue
}
ar.files = append(ar.files, RarMember{
Header: header,
Offset: offsetAcc,
})
}
if len(ar.files) == 0 {
return nil, errors.New(ar.name + ": no supported images in the rar file")
}
sort.Sort(RarMembers(ar.files))
ar.Close()
return ar, nil
}
func (ar *Rar) checkbounds(i int) error {
if i < 0 || i >= len(ar.files) {
return ErrBounds
}
return nil
}
func (ar *Rar) Load(i int, autorotate bool, _nPreload int) (*gdk.Pixbuf, error) {
var err error
if err = ar.checkbounds(i); err != nil {
return nil, err
}
ar.reader, err = rardecode.OpenReader(ar.name)
if err != nil {
return nil, err
}
targetOffset := ar.files[i].Offset
offsetAcc := -1
for {
offsetAcc += 1
header, err := ar.reader.Next()
if err != nil {
if err == io.EOF {
break
}
log.Printf("error reading a file inside the rar archive: %v", err)
}
if header.IsDir {
continue
}
if offsetAcc == targetOffset {
defer ar.Close()
return pixbuf.Load(ar.reader, autorotate)
}
}
return nil, fmt.Errorf(ar.name + ": could not find a file inside the rar archive")
}
func (ar *Rar) Kind() Kind {
return Packed
}
func (ar *Rar) ArchiveName() string {
return ar.name
}
func (ar *Rar) Name(i int) (string, error) {
if err := ar.checkbounds(i); err != nil {
return "", err
}
return ar.files[i].Header.Name, nil
}
func (ar *Rar) Len() *int {
l := len(ar.files)
return &l
}
func (ar *Rar) Close() error {
return ar.reader.Close()
}

View file

@ -37,7 +37,7 @@ type Loader interface {
Len() int
}
var archiveExtensions = []string{".zip", ".cbz"}
var archiveExtensions = []string{".zip", ".cbz", ".rar"}
var imageExtensions []string
func init() {

1
go.mod
View file

@ -7,6 +7,7 @@ go 1.20
require (
github.com/flytam/filenamify v1.2.0
github.com/gotk3/gotk3 v0.6.2
github.com/nwaples/rardecode/v2 v2.0.0-beta.2
github.com/spf13/pflag v1.0.5
golang.org/x/sys v0.14.0
)

2
go.sum
View file

@ -6,6 +6,8 @@ github.com/gotk3/gotk3 v0.6.1 h1:GJ400a0ecEEWrzjBvzBzH+pB/esEMIGdB9zPSmBdoeo=
github.com/gotk3/gotk3 v0.6.1/go.mod h1:/hqFpkNa9T3JgNAE2fLvCdov7c5bw//FHNZrZ3Uv9/Q=
github.com/gotk3/gotk3 v0.6.2 h1:sx/PjaKfKULJPTPq8p2kn2ZbcNFxpOJqi4VLzMbEOO8=
github.com/gotk3/gotk3 v0.6.2/go.mod h1:/hqFpkNa9T3JgNAE2fLvCdov7c5bw//FHNZrZ3Uv9/Q=
github.com/nwaples/rardecode/v2 v2.0.0-beta.2 h1:e3mzJFJs4k83GXBEiTaQ5HgSc/kOK8q0rDaRO0MPaOk=
github.com/nwaples/rardecode/v2 v2.0.0-beta.2/go.mod h1:yntwv/HfMc/Hbvtq9I19D1n58te3h6KsqCf3GxyfBGY=
github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
golang.org/x/sys v0.4.0 h1:Zr2JFtRQNX3BCZ8YtxRE9hNJYC8J6I1MVbMg6owUp18=

View file

@ -23,6 +23,7 @@
<mime-types>
<mime-type>application/zip</mime-type>
<mime-type>application/x-cbz</mime-type>
<mime-type>application/vnd.rar</mime-type>
</mime-types>
</object>
<object class="GtkRecentFilter" id="RecentFilter">