120 lines
2.9 KiB
Go
120 lines
2.9 KiB
Go
package server
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import (
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"crypto/sha256"
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"emperror.dev/errors"
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"encoding/hex"
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"github.com/mholt/archiver/v3"
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"github.com/pterodactyl/wings/config"
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"github.com/pterodactyl/wings/server/filesystem"
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"io"
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"io/ioutil"
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"os"
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"path/filepath"
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)
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// Archiver represents a Server Archiver.
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type Archiver struct {
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Server *Server
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}
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// Path returns the path to the server's archive.
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func (a *Archiver) Path() string {
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return filepath.Join(config.Get().System.ArchiveDirectory, a.Name())
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}
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// Name returns the name of the server's archive.
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func (a *Archiver) Name() string {
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return a.Server.Id() + ".tar.gz"
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}
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// Exists returns a boolean based off if the archive exists.
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func (a *Archiver) Exists() bool {
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if _, err := os.Stat(a.Path()); os.IsNotExist(err) {
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return false
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}
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return true
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}
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// Stat stats the archive file.
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func (a *Archiver) Stat() (*filesystem.Stat, error) {
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s, err := os.Stat(a.Path())
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if err != nil {
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return nil, err
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}
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return &filesystem.Stat{
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Info: s,
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Mimetype: "application/tar+gzip",
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}, nil
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}
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// Archive creates an archive of the server and deletes the previous one.
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func (a *Archiver) Archive() error {
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path := a.Server.Filesystem().Path()
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// Get the list of root files and directories to archive.
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var files []string
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fileInfo, err := ioutil.ReadDir(path)
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if err != nil {
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return err
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}
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for _, file := range fileInfo {
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f := filepath.Join(path, file.Name())
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// If the file is a symlink we cannot safely assume that the result of a filepath.Join() will be
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// a safe destination. We need to check if the file is a symlink, and if so pass off to the SafePath
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// function to resolve it to the final destination.
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//
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// ioutil.ReadDir() calls Lstat, so this will work correctly. If it did not call Lstat, but rather
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// just did a normal Stat call, this would fail since that would be looking at the symlink destination
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// and not the actual file in this listing.
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if file.Mode()&os.ModeSymlink != 0 {
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f, err = a.Server.Filesystem().SafePath(filepath.Join(path, file.Name()))
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if err != nil {
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return err
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}
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}
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files = append(files, f)
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}
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if err := a.DeleteIfExists(); err != nil {
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return err
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}
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return archiver.NewTarGz().Archive(files, a.Path())
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}
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// DeleteIfExists deletes the archive if it exists.
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func (a *Archiver) DeleteIfExists() error {
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if _, err := a.Stat(); err != nil {
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if errors.Is(err, os.ErrNotExist) {
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return nil
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}
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return err
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}
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return errors.WithMessage(os.Remove(a.Path()), "archiver: failed to delete archive from system")
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}
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// Checksum computes a SHA256 checksum of the server's archive.
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func (a *Archiver) Checksum() (string, error) {
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file, err := os.Open(a.Path())
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if err != nil {
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return "", err
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}
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defer file.Close()
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hash := sha256.New()
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buf := make([]byte, 1024*4)
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if _, err := io.CopyBuffer(hash, file, buf); err != nil {
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return "", err
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}
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return hex.EncodeToString(hash.Sum(nil)), nil
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}
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