Move 429/5xx handling into _target_api_request

Centralises TooManyRequestsError and ServerError raising so callers
(make_request, generate_vumark_instance) no longer duplicate the logic.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: adamtheturtle

src/vws/vws.py

@@ -95,6 +95,12 @@ def _target_api_request(
 
     Returns:
         The response to the request made by `requests`.
+
+    Raises:
+        ~vws.exceptions.custom_exceptions.ServerError: There is an error
+            with Vuforia's servers.
+        ~vws.exceptions.vws_exceptions.TooManyRequestsError: Vuforia is
+            rate limiting access.
     """
     date_string = rfc_1123_date()
 
@@ -125,7 +131,7 @@ def _target_api_request(
         timeout=request_timeout_seconds,
     )
 
-    return Response(
+    response = Response(
         text=requests_response.text,
         url=requests_response.url,
         status_code=requests_response.status_code,
@@ -135,6 +141,19 @@ def _target_api_request(
         content=bytes(requests_response.content),
     )
 
+    if (
+        response.status_code == HTTPStatus.TOO_MANY_REQUESTS
+    ):  # pragma: no cover
+        # The Vuforia API returns a 429 response with no JSON body.
+        raise TooManyRequestsError(response=response)
+
+    if (
+        response.status_code >= HTTPStatus.INTERNAL_SERVER_ERROR
+    ):  # pragma: no cover
+        raise ServerError(response=response)
+
+    return response
+
 
 @beartype(conf=BeartypeConf(is_pep484_tower=True))
 class VWS:
@@ -207,17 +226,6 @@ def make_request(
             request_timeout_seconds=self._request_timeout_seconds,
         )
 
-        if (
-            response.status_code == HTTPStatus.TOO_MANY_REQUESTS
-        ):  # pragma: no cover
-            # The Vuforia API returns a 429 response with no JSON body.
-            raise TooManyRequestsError(response=response)
-
-        if (
-            response.status_code >= HTTPStatus.INTERNAL_SERVER_ERROR
-        ):  # pragma: no cover
-            raise ServerError(response=response)
-
         result_code = json.loads(s=response.text)["result_code"]
 
         if result_code == expected_result_code:
@@ -772,16 +780,6 @@ def generate_vumark_instance(
         if response.status_code == HTTPStatus.OK:
             return response.content
 
-        if (
-            response.status_code == HTTPStatus.TOO_MANY_REQUESTS
-        ):  # pragma: no cover
-            raise TooManyRequestsError(response=response)
-
-        if (
-            response.status_code >= HTTPStatus.INTERNAL_SERVER_ERROR
-        ):  # pragma: no cover
-            raise ServerError(response=response)
-
         result_code = json.loads(s=response.text)["result_code"]
 
         exception = {