Add ability to create archives of servers, add GET and POST /api/servers/:server/archive routes to get and request an archive of a server

server/archiver.go

@@ -0,0 +1,75 @@
+package server
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"github.com/mholt/archiver/v3"
+	"github.com/pterodactyl/wings/config"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+)
+
+// Archiver represents a Server Archiver.
+type Archiver struct {
+	Server *Server
+}
+
+// ArchivePath returns the path to the server's archive.
+func (a *Archiver) ArchivePath() string {
+	return filepath.Join(config.Get().System.Data, ".archives", a.ArchiveName())
+}
+
+// ArchiveName returns the name of the server's archive.
+func (a *Archiver) ArchiveName() string {
+	return a.Server.Uuid + ".tar.gz"
+}
+
+// Exists returns a boolean based off if the archive exists.
+func (a *Archiver) Exists() bool {
+	if _, err := os.Stat(a.ArchivePath()); os.IsNotExist(err) {
+		return false
+	}
+
+	return true
+}
+
+// Stat .
+func (a *Archiver) Stat() (*Stat, error) {
+	return a.Server.Filesystem.unsafeStat(a.ArchivePath())
+}
+
+// Archive creates an archive of the server.
+func (a *Archiver) Archive() error {
+	path := a.Server.Filesystem.Path()
+
+	// Get the list of root files and directories to archive.
+	var files []string
+	fileInfo, err := ioutil.ReadDir(path)
+	if err != nil {
+		return err
+	}
+
+	for _, file := range fileInfo {
+		files = append(files, filepath.Join(path, file.Name()))
+	}
+
+	return archiver.NewTarGz().Archive(files, a.ArchivePath())
+}
+
+// Checksum computes a SHA256 checksum of the server's archive.
+func (a *Archiver) Checksum() (string, error) {
+	file, err := os.Open(a.ArchivePath())
+	if err != nil {
+		return "", err
+	}
+	defer file.Close()
+
+	hash := sha256.New()
+	if _, err := io.Copy(hash, file); err != nil {
+		return "", err
+	}
+
+	return hex.EncodeToString(hash.Sum(nil)), nil
+}