Fix update_user_info avatar logic in service_user

Signed-off-by: Asai Neko <sugar@sne.moe>

service/service_user/update_user_info.go

@@ -87,26 +87,29 @@ func (self *UserServiceImpl) UpdateUserInfo(payload *UserInfoPayload) (result *U
 	}
 
 	if payload.Data.Avatar != nil {
-		_, err := url.ParseRequestURI(*payload.Data.Avatar)
-		if err != nil {
-			execption := new(exception.Builder).
-				SetStatus(exception.StatusUser).
-				SetService(exception.ServiceUser).
-				SetEndpoint(exception.EndpointUserServiceUpdate).
-				SetType(exception.TypeCommon).
-				SetOriginal(exception.CommonErrorInvalidInput).
-				SetError(err).
-				Throw(payload.Context)
+		val := *payload.Data.Avatar
+		if val != "" {
+			_, err := url.ParseRequestURI(*payload.Data.Avatar)
+			if err != nil {
+				execption := new(exception.Builder).
+					SetStatus(exception.StatusUser).
+					SetService(exception.ServiceUser).
+					SetEndpoint(exception.EndpointUserServiceUpdate).
+					SetType(exception.TypeCommon).
+					SetOriginal(exception.CommonErrorInvalidInput).
+					SetError(err).
+					Throw(payload.Context)
 
-			result = &UserInfoResult{
-				Common: shared.CommonResult{
-					HttpCode:  400,
-					Exception: execption,
-				},
-				Data: nil,
+				result = &UserInfoResult{
+					Common: shared.CommonResult{
+						HttpCode:  400,
+						Exception: execption,
+					},
+					Data: nil,
+				}
+
+				return
 			}
-
-			return
 		}
 		updates["avatar"] = *payload.Data.Avatar
 	}