update logic to use ansi escape characters

livelog/extractor/writer.go

@@ -7,7 +7,12 @@ import (
 	"regexp"
 )
 
-var re = regexp.MustCompile("#((.*?)#)")
+const Esc = "\u001B"
+
+var (
+	prefix = Esc + "]1338;"
+	re     = regexp.MustCompilePOSIX("\u001B]1338;((.*?)\u001B]0m)")
+)
 
 type Writer struct {
 	base io.Writer
@@ -19,16 +24,18 @@ func New(w io.Writer) *Writer {
 }
 
 func (e *Writer) Write(p []byte) (n int, err error) {
-	if bytes.HasPrefix(p, []byte("#")) == false {
+	if bytes.HasPrefix(p, []byte(prefix)) == false {
 		return e.base.Write(p)
 	}
 	card := re.FindStringSubmatch(string(p))
-	data, err := base64.StdEncoding.DecodeString(card[len(card)-1:][0])
-	if err == nil {
-		e.file = data
+	if len(card) != 0 {
+		data, err := base64.StdEncoding.DecodeString(card[len(card)-1:][0])
+		if err == nil {
+			e.file = data
+		}
+		return e.base.Write([]byte(""))
 	}
-	// remove encoded string for logs
-	return e.base.Write([]byte(""))
+	return e.base.Write(p)
 }
 
 func (e *Writer) File() ([]byte, bool) {