fixed parser bug when handling empty strings, added empty string check to email alarm

alarm/alarm_email.go

@@ -44,6 +44,9 @@ func (a *AlarmEmail) Parse(tk string) (bool, error) {
 				case "smtp":
 					a.state = TK_SMTP
 				default:
+					if len(a.To) < 1 {
+						return false, fmt.Errorf("email alarm requires to address")
+					}
 					return false, nil
 			}
 
@@ -56,6 +59,9 @@ func (a *AlarmEmail) Parse(tk string) (bool, error) {
 			a.state = TK_NONE
 
 		case TK_TO:
+			if strings.TrimSpace(tk) == "" {
+				return false, fmt.Errorf("to address cannot be empty")
+			}
 			a.To = append(a.To, tk)
 			a.state = TK_NONE
 

config/parser.go

@@ -292,10 +292,17 @@ func (p *Parser) Split(data []byte, atEOF bool) (int, []byte, error) {
 			}
 
 		case '\'', '"', '`':
-			if started && quote == c {
+			// When the quote ends
+			if quote == c {
+				// if we've gotten data, return it
+				if started {
 					return i + 1, data[startidx:i], nil
 				}
+				// if we haven't return nothing
+				return i + 1, []byte{}, nil
+			}
 
+			// start a quoted string
 			if !ignoreline && quote == 0 {
 				quote = c
 			}
@@ -314,6 +321,10 @@ func (p *Parser) Split(data []byte, atEOF bool) (int, []byte, error) {
 	}
 
 	if atEOF {
+		if quote != 0 {
+			return 0, nil, fmt.Errorf("unterminated quote")
+		}
+
 		if ignoreline {
 			return len(data), nil, nil
 		}