fix: fix hanging when reading a named pipe file (closes #1155)

files/file.go

@@ -135,6 +135,10 @@ func (i *FileInfo) Checksum(algo string) error {
 //nolint:goconst
 //TODO: use constants
 func (i *FileInfo) detectType(modify, saveContent bool) error {
+	if IsNamedPipe(i.Mode) {
+		i.Type = "blob"
+		return nil
+	}
 	// failing to detect the type should not return error.
 	// imagine the situation where a file in a dir with thousands
 	// of files couldn't be opened: we'd have immediately
@@ -232,9 +236,9 @@ func (i *FileInfo) readListing(checker rules.Checker) error {
 			continue
 		}
 
-		if strings.HasPrefix(f.Mode().String(), "L") {
+		if IsSymlink(f.Mode()) {
 			// It's a symbolic link. We try to follow it. If it doesn't work,
-			// we stay with the link information instead if the target's.
+			// we stay with the link information instead of the target's.
 			info, err := i.Fs.Stat(fPath)
 			if err == nil {
 				f = info

files/utils.go

@@ -1,6 +1,7 @@
 package files
 
 import (
+	"os"
 	"unicode/utf8"
 )
 
@@ -48,3 +49,11 @@ func isBinary(content []byte, _ int) bool {
 	}
 	return false
 }
+
+func IsNamedPipe(mode os.FileMode) bool {
+	return mode&os.ModeNamedPipe != 0
+}
+
+func IsSymlink(mode os.FileMode) bool {
+	return mode&os.ModeSymlink != 0
+}

http/raw.go

@@ -1,7 +1,9 @@
 package http
 
 import (
+	"bytes"
 	"errors"
+	"io/ioutil"
 	"net/http"
 	"net/url"
 	gopath "path"
@@ -9,6 +11,7 @@ import (
 	"strings"
 
 	"github.com/mholt/archiver"
+	"github.com/spf13/afero"
 
 	"github.com/filebrowser/filebrowser/v2/files"
 	"github.com/filebrowser/filebrowser/v2/fileutils"
@@ -91,6 +94,11 @@ var rawHandler = withUser(func(w http.ResponseWriter, r *http.Request, d *data)
 		return errToStatus(err), err
 	}
 
+	if files.IsNamedPipe(file.Mode) {
+		setContentDisposition(w, r, file)
+		return 0, nil
+	}
+
 	if !file.IsDir {
 		return rawFileHandler(w, r, file)
 	}
@@ -110,11 +118,18 @@ func addFile(ar archiver.Writer, d *data, path, commonPath string) error {
 		return err
 	}
 
-	file, err := d.user.Fs.Open(path)
+	var (
+		file          afero.File
+		arcReadCloser = ioutil.NopCloser(&bytes.Buffer{})
+	)
+	if !files.IsNamedPipe(info.Mode()) {
+		file, err = d.user.Fs.Open(path)
 		if err != nil {
 			return err
 		}
 		defer file.Close()
+		arcReadCloser = file
+	}
 
 	if path != commonPath {
 		filename := strings.TrimPrefix(path, commonPath)
@@ -124,7 +139,7 @@ func addFile(ar archiver.Writer, d *data, path, commonPath string) error {
 				FileInfo:   info,
 				CustomName: filename,
 			},
-			ReadCloser: file,
+			ReadCloser: arcReadCloser,
 		})
 		if err != nil {
 			return err