rebuilding js

Former-commit-id: 027e2f6546614d28750e437b9a3545cb95235d9d [formerly 6dbfe621a5774304295c17f216b5c96beaaaa95a] [formerly d44822f30d9a3649b20daa7a3cdbf86c87e63c99 [formerly 3258552349]]
Former-commit-id: 7f34ddc1b32076c6ad2c2a4374b170b7f5d84000 [formerly aaafd299a933d25ebcb5fdebe1b00cb9e8309d7a]
Former-commit-id: 7bb183c165ba2c9711ba1c04e3af6e2048245ded

download.go

@@ -0,0 +1,95 @@
+package filemanager
+
+import (
+	"io"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/mholt/archiver"
+)
+
+// serveDownload creates an archive in one of the supported formats (zip, tar,
+// tar.gz or tar.bz2) and sends it to be downloaded.
+func serveDownload(c *requestContext, w http.ResponseWriter, r *http.Request) (int, error) {
+	query := r.URL.Query().Get("download")
+
+	if !c.fi.IsDir {
+		w.Header().Set("Content-Disposition", "attachment; filename="+c.fi.Name)
+		http.ServeFile(w, r, c.fi.Path)
+		return 0, nil
+	}
+
+	files := []string{}
+	names := strings.Split(r.URL.Query().Get("files"), ",")
+
+	if len(names) != 0 {
+		for _, name := range names {
+			name, err := url.QueryUnescape(name)
+
+			if err != nil {
+				return http.StatusInternalServerError, err
+			}
+
+			files = append(files, filepath.Join(c.fi.Path, name))
+		}
+
+	} else {
+		files = append(files, c.fi.Path)
+	}
+
+	if query == "true" {
+		query = "zip"
+	}
+
+	var (
+		extension string
+		temp      string
+		err       error
+		tempfile  string
+	)
+
+	temp, err = ioutil.TempDir("", "")
+	if err != nil {
+		return http.StatusInternalServerError, err
+	}
+
+	defer os.RemoveAll(temp)
+	tempfile = filepath.Join(temp, "temp")
+
+	switch query {
+	case "zip":
+		extension, err = ".zip", archiver.Zip.Make(tempfile, files)
+	case "tar":
+		extension, err = ".tar", archiver.Tar.Make(tempfile, files)
+	case "targz":
+		extension, err = ".tar.gz", archiver.TarGz.Make(tempfile, files)
+	case "tarbz2":
+		extension, err = ".tar.bz2", archiver.TarBz2.Make(tempfile, files)
+	case "tarxz":
+		extension, err = ".tar.xz", archiver.TarXZ.Make(tempfile, files)
+	default:
+		return http.StatusNotImplemented, nil
+	}
+
+	if err != nil {
+		return http.StatusInternalServerError, err
+	}
+
+	file, err := os.Open(temp + "/temp")
+	if err != nil {
+		return http.StatusInternalServerError, err
+	}
+
+	name := c.fi.Name
+	if name == "." || name == "" {
+		name = "download"
+	}
+
+	w.Header().Set("Content-Disposition", "attachment; filename="+name+extension)
+	io.Copy(w, file)
+	return http.StatusOK, nil
+}