New error types.

aiogram/bot/api.py

@@ -79,6 +79,8 @@ async def _check_result(method_name, response):
         raise exceptions.NetworkError('File too large for uploading. '
                                       'Check telegram api limits https://core.telegram.org/bots/api#senddocument')
     elif response.status >= HTTPStatus.INTERNAL_SERVER_ERROR:
+        if 'restart' in description:
+            raise exceptions.RestartingTelegram()
         raise exceptions.TelegramAPIError(description)
     raise exceptions.TelegramAPIError(f"{description} [{response.status}]")
 

aiogram/utils/exceptions.py

@@ -19,6 +19,7 @@ TelegramAPIError
         BadWebhook
             WebhookRequireHTTPS
             BadWebhookPort
+            BadWebhookAddrInfo
         CantParseUrl
         NotFound
             MethodNotKnown
@@ -39,6 +40,7 @@ TelegramAPIError
     NetworkError
     RetryAfter
     MigrateToChat
+    RestartingTelegram
 
 AIOGramWarning
     TimeoutWarning
@@ -232,6 +234,11 @@ class BadWebhookPort(BadWebhook):
     text = 'bad webhook: ' + match
 
 
+class BadWebhookAddrInfo(BadWebhook):
+    match = 'getaddrinfo: Temporary failure in name resolution'
+    text = 'bad webhook: ' + match
+
+
 class CantParseUrl(BadRequest):
     match = 'can\'t parse URL'
 
@@ -282,6 +289,11 @@ class NetworkError(TelegramAPIError):
     pass
 
 
+class RestartingTelegram(TelegramAPIError):
+    def __init__(self):
+        super(RestartingTelegram, self).__init__('The Telegram Bot API service is restarting. Wait few second.')
+
+
 class RetryAfter(TelegramAPIError):
     def __init__(self, retry_after):
         super(RetryAfter, self).__init__(f"Flood control exceeded. Retry in {retry_after} seconds.")