fix: long message handling

exporter/text.go

@@ -35,7 +35,13 @@ func TextExporter(s *store.Store) http.HandlerFunc {
 
 		fmt.Fprint(w, vert, strings.Repeat(" ", 78), vert, "\n")
 
-		fmt.Fprintf(w, "%s%-78s%s\n", vert, i.Message, vert)
+		for offset := 0; offset < len(i.Message); offset += 78 {
+			end := offset + 78
+			if end >= len(i.Message) {
+				end = len(i.Message) - 1
+			}
+			fmt.Fprintf(w, "%s%-78s%s\n", vert, i.Message[offset:end], vert)
+		}
 
 		if bold {
 			fmt.Fprintln(w, "┻━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┻")

store/record.go

@@ -51,12 +51,22 @@ func ParseRecord(s string) (Record, error) {
 	return r, nil
 }
 
+func (r Record) Sanitize() Record {
+	return Record{
+		CheckedAt: r.CheckedAt,
+		Target:    r.Target,
+		Status:    r.Status,
+		Message:   strings.ReplaceAll(strings.ReplaceAll(r.Message, "\t", "    "), "\n", " "),
+		Latency:   r.Latency,
+	}
+}
+
 func (r Record) String() string {
 	return strings.Join([]string{
 		r.CheckedAt.Format(time.RFC3339),
 		r.Status.String(),
 		fmt.Sprintf("%.3f", float64(r.Latency.Microseconds())/1000),
 		r.Target.String(),
-		strings.ReplaceAll(strings.ReplaceAll(r.Message, "\t", "    "), "\n", " "),
+		r.Message,
 	}, "\t")
 }

store/store.go

@@ -98,6 +98,8 @@ func (s *Store) Append(r Record) {
 	s.Lock()
 	defer s.Unlock()
 
+	r = r.Sanitize()
+
 	f, err := os.OpenFile(s.Path, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0644)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "failed to open log file: %s", err)