Sanitize log filename before saving

Remove invalid path characters

internal/view/log.go

@@ -7,6 +7,7 @@ import (
 	"io"
 	"os"
 	"path/filepath"
+	"regexp"
 	"strings"
 	"time"
 
@@ -29,6 +30,9 @@ const (
 	flushTimeout = 50 * time.Millisecond
 )
 
+// InvalidCharsRX contains invalid filename characters.
+var invalidPathCharsRX = regexp.MustCompile(`[:/\\]+`)
+
 // Log represents a generic log viewer.
 type Log struct {
 	*tview.Flex
@@ -284,12 +288,19 @@ func (l *Log) SaveCmd(evt *tcell.EventKey) *tcell.EventKey {
 	return nil
 }
 
+// SanitizeFilename removes characters not allowed by OS
+func SanitizeFilename(name string) string {
+	processedString := invalidPathCharsRX.ReplaceAllString(name, "-")
+
+	return processedString
+}
+
 func ensureDir(dir string) error {
 	return os.MkdirAll(dir, 0744)
 }
 
 func saveData(cluster, name, data string) (string, error) {
-	dir := filepath.Join(config.K9sDumpDir, cluster)
+	dir := filepath.Join(config.K9sDumpDir, SanitizeFilename(cluster))
 	if err := ensureDir(dir); err != nil {
 		return "", err
 	}

internal/view/log_test.go

@@ -43,6 +43,23 @@ func TestLogViewSave(t *testing.T) {
 	assert.Equal(t, len(c2), len(c1)+1)
 }
 
+func TestSanitizedFilename(t *testing.T) {
+	uu := []struct {
+		name     string
+		expected string
+	}{
+		{"alpha", "alpha"},
+		{"123", "123"},
+		{"with/slash", "with-slash"},
+		{"with:colon", "with-colon"},
+		{":many:invalid\\characters\\", "-many-invalid-characters-"},
+	}
+
+	for _, u := range uu {
+		assert.Equal(t, u.expected, view.SanitizeFilename(u.name))
+	}
+}
+
 // ----------------------------------------------------------------------------
 // Helpers...