updates

http_download.go

@@ -0,0 +1,95 @@
+package filemanager
+
+import (
+	"io"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/mholt/archiver"
+)
+
+// download creates an archive in one of the supported formats (zip, tar,
+// tar.gz or tar.bz2) and sends it to be downloaded.
+func download(w http.ResponseWriter, r *http.Request, i *FileInfo) (int, error) {
+	query := r.URL.Query().Get("download")
+
+	if !i.IsDir {
+		w.Header().Set("Content-Disposition", "attachment; filename="+i.Name)
+		http.ServeFile(w, r, i.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(i.Path, name))
+		}
+
+	} else {
+		files = append(files, i.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 := i.Name
+	if name == "." || name == "" {
+		name = "download"
+	}
+
+	w.Header().Set("Content-Disposition", "attachment; filename="+name+extension)
+	io.Copy(w, file)
+	return http.StatusOK, nil
+}