Merge pull request #55 from smartystreets/eric/fix-retry-logic

Eric/fix retry logic

Author: RyanLCox1

smartystreets_python_sdk/retry_sender.py

@@ -5,8 +5,9 @@
 
 class RetrySender:
     MAX_BACKOFF_DURATION = 10
-    STATUS_OK = 200
     TOO_MANY_REQUESTS = 429
+    STATUS_TO_RETRY = [408, 500, 502, 503, 504]
+    
 
     def __init__(self, max_retries, inner):
         self.inner = inner
@@ -16,9 +17,6 @@ def send(self, request):
         response = self.inner.send(request)
 
         for i in range(self.max_retries):
-            if response.status_code == RetrySender.STATUS_OK:
-                break
-
             if response.status_code == RetrySender.TOO_MANY_REQUESTS:
                 backoff_seconds = 10
                 retry_after = response.getHeader("Retry-After")
@@ -27,8 +25,10 @@ def send(self, request):
                     backoff_seconds = int(retry_after)
 
                 backoff(backoff_seconds, True)
-            else:
+            elif response.status_code in RetrySender.STATUS_TO_RETRY:
                 backoff(i)
+            else:
+                break
 
             response = self.inner.send(request)
 

test/retry_sender_test.py

@@ -22,9 +22,17 @@ def test_success_does_not_retry(self, mocked):
 
         self.assertEqual(1, inner.current_status_code_index)
 
+    @patch('smartystreets_python_sdk.retry_sender.backoff', side_effect=mock_backoff)
+    def test_payment_required_does_not_retry(self, mocked):
+        inner = FailingSender([402])
+
+        send_with_retry(5, inner)
+
+        self.assertEqual(1, inner.current_status_code_index)
+
     @patch('smartystreets_python_sdk.retry_sender.backoff', side_effect=mock_backoff)
     def test_retry_until_success(self, mocked):
-        inner = FailingSender([401, 402, 400, 200, 500])
+        inner = FailingSender([408, 500, 502, 200, 504])
 
         send_with_retry(10, inner)
 
@@ -43,7 +51,7 @@ def test_return_response_if_retry_limit_exceeded(self, mocked):
 
     @patch('smartystreets_python_sdk.retry_sender.backoff', side_effect=mock_backoff)
     def test_backoff_does_not_exceed_max(self, mocked):
-        inner = FailingSender([401, 402, 400, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500, 200])
+        inner = FailingSender([408, 408, 408, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500, 200])
 
         send_with_retry(20, inner)