Merge pull request #309 from bug-or-feature/invalid_token

Invalid token

trading_ig/rest.py

@@ -41,6 +41,12 @@ class ApiExceededException(Exception):
     pass
 
 
+class TokenInvalidException(Exception):
+    """Raised when the v3 session token is invalid or expired"""
+
+    pass
+
+
 class IGException(Exception):
     pass
 
@@ -385,6 +391,10 @@ def _request(self, action, endpoint, params, session, version="1", check=True):
         response.encoding = "utf-8"
         if self._api_limit_hit(response.text):
             raise ApiExceededException()
+        if self._token_invalid(response.text):
+            logger.error("Invalid authentication token, triggering refresh...")
+            self._valid_until = datetime.now() - timedelta(seconds=15)
+            raise TokenInvalidException()
         return response
 
     @staticmethod
@@ -397,6 +407,10 @@ def _api_limit_hit(response_text):
             or "exceeded-account-trading-allowance" in response_text
         )
 
+    @staticmethod
+    def _token_invalid(response_text):
+        return "oauth-token-invalid" in response_text
+
     # ---------- PARSE_RESPONSE ----------- #
 
     @staticmethod