fix gao user invite validate

src/main/java/com/imyeyu/api/modules/gao/service/implement/GaoUserInviteServiceImplement.java

@@ -66,6 +66,7 @@ public class GaoUserInviteServiceImplement implements GaoUserInviteService {
 	private static final long REGISTER_RATE_LIMIT_TTL = Time.M * 10;
 	private static final int CODE_RATE_LIMIT = 30;
 	private static final int REGISTER_VALUE_RATE_LIMIT = 10;
+	private static final String INVALID_INVITE_MESSAGE = "邀请码无效或已过期";
 
 	private static final SecureRandom SECURE_RANDOM = new SecureRandom();
 
@@ -152,9 +153,16 @@ public class GaoUserInviteServiceImplement implements GaoUserInviteService {
 	public GaoUserInviteValidateResponse validate(String code) {
 		TimiException.required(code, "not found code");
 		checkCodeRateLimit(code);
+		try {
 			GaoUserInviteCache cache = requireValidInvite(code);
 			validateInviteTarget(cache);
 			return new GaoUserInviteValidateResponse(true, cache.getExpireAt());
+		} catch (TimiException e) {
+			if (TimiCode.ARG_BAD == e.getCode() && INVALID_INVITE_MESSAGE.equals(e.getMessage())) {
+				return new GaoUserInviteValidateResponse(false, -1L);
+			}
+			throw e;
+		}
 	}
 
 	@Transactional(TimiServerDBConfig.ROLLBACKER)
@@ -354,7 +362,7 @@ public class GaoUserInviteServiceImplement implements GaoUserInviteService {
 	}
 
 	private TimiException invalidInvite() {
-		return new TimiException(TimiCode.ARG_BAD, "邀请码无效或已过期");
+		return new TimiException(TimiCode.ARG_BAD, INVALID_INVITE_MESSAGE);
 	}
 
 	private boolean isCoreAdmin() {

src/main/java/com/imyeyu/api/modules/gao/vo/GaoUserInviteValidateResponse.java

@@ -14,6 +14,6 @@ public class GaoUserInviteValidateResponse {
 	/// true 为邀请码可用
 	private boolean valid;
 
-	/// 邀请过期时间，毫秒时间戳
+	/// 邀请过期时间，毫秒时间戳；valid 为 false 时为 0
 	private Long expireAt;
 }