128 lines
3.0 KiB
Go
128 lines
3.0 KiB
Go
package http
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import (
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"io"
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"io/ioutil"
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"net/http"
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"net/url"
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"os"
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"path/filepath"
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"strings"
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fm "github.com/hacdias/filemanager"
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"github.com/hacdias/fileutils"
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"github.com/mholt/archiver"
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)
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// downloadHandler creates an archive in one of the supported formats (zip, tar,
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// tar.gz or tar.bz2) and sends it to be downloaded.
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func downloadHandler(c *fm.Context, w http.ResponseWriter, r *http.Request) (int, error) {
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// If the file isn't a directory, serve it using http.ServeFile. We display it
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// inline if it is requested.
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if !c.File.IsDir {
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return downloadFileHandler(c, w, r)
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}
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query := r.URL.Query().Get("format")
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files := []string{}
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names := strings.Split(r.URL.Query().Get("files"), ",")
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// If there are files in the query, sanitize their names.
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// Otherwise, just append the current path.
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if len(names) != 0 {
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for _, name := range names {
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// Unescape the name.
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name, err := url.QueryUnescape(name)
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if err != nil {
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return http.StatusInternalServerError, err
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}
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// Clean the slashes.
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name = fileutils.SlashClean(name)
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files = append(files, filepath.Join(c.File.Path, name))
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}
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} else {
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files = append(files, c.File.Path)
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}
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// If the format is true, just set it to "zip".
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if query == "true" || query == "" {
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query = "zip"
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}
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var (
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extension string
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temp string
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err error
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tempfile string
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)
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// Create a temporary directory.
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temp, err = ioutil.TempDir("", "")
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if err != nil {
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return http.StatusInternalServerError, err
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}
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defer os.RemoveAll(temp)
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tempfile = filepath.Join(temp, "temp")
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switch query {
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case "zip":
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extension, err = ".zip", archiver.Zip.Make(tempfile, files)
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case "tar":
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extension, err = ".tar", archiver.Tar.Make(tempfile, files)
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case "targz":
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extension, err = ".tar.gz", archiver.TarGz.Make(tempfile, files)
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case "tarbz2":
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extension, err = ".tar.bz2", archiver.TarBz2.Make(tempfile, files)
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case "tarxz":
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extension, err = ".tar.xz", archiver.TarXZ.Make(tempfile, files)
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default:
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return http.StatusNotImplemented, nil
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}
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if err != nil {
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return http.StatusInternalServerError, err
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}
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// Defines the file name.
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name := c.File.Name
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if name == "." || name == "" {
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name = "download"
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}
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name += extension
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// Opens the file so it can be downloaded.
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file, err := os.Open(temp + "/temp")
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if err != nil {
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return http.StatusInternalServerError, err
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}
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defer file.Close()
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w.Header().Set("Content-Disposition", "attachment; filename=\""+name+"\"")
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_, err = io.Copy(w, file)
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return 0, err
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}
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func downloadFileHandler(c *fm.Context, w http.ResponseWriter, r *http.Request) (int, error) {
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if r.URL.Query().Get("inline") == "true" {
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w.Header().Set("Content-Disposition", "inline")
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} else {
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w.Header().Set("Content-Disposition", `attachment; filename="`+c.File.Name+`"`)
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}
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file, err := os.Open(c.File.Path)
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defer file.Close()
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if err != nil {
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return http.StatusInternalServerError, err
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}
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_, err = io.Copy(w, file)
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if err != nil {
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return http.StatusInternalServerError, err
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}
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return 0, nil
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}
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