fix(ios): retry transient App Store Connect errors in Xcode Cloud monitor

.github/workflows/ios-xcode-cloud.yml

@@ -96,22 +96,37 @@ jobs:
               token = encoded.decode() if isinstance(encoded, bytes) else encoded
               return token
 
-          def api(method, path, body=None):
-              request = urllib.request.Request(
-                  "https://api.appstoreconnect.apple.com" + path,
-                  data=None if body is None else json.dumps(body).encode(),
-                  method=method,
-              )
-              request.add_header("Authorization", f"Bearer {ensure_token()}")
-              if body is not None:
-                  request.add_header("Content-Type", "application/json")
-              try:
-                  with urllib.request.urlopen(request) as response:
-                      payload = response.read().decode()
-                      return json.loads(payload) if payload else {}
-              except urllib.error.HTTPError as error:
-                  details = error.read().decode()
-                  raise SystemExit(f"App Store Connect API {method} {path} failed ({error.code}): {details}")
+          def invalidate_token():
+              global token, token_exp
+              token = None
+              token_exp = 0
+
+          def api(method, path, body=None, attempts=5):
+              last_error = None
+              for attempt in range(1, attempts + 1):
+                  request = urllib.request.Request(
+                      "https://api.appstoreconnect.apple.com" + path,
+                      data=None if body is None else json.dumps(body).encode(),
+                      method=method,
+                  )
+                  request.add_header("Authorization", f"Bearer {ensure_token()}")
+                  if body is not None:
+                      request.add_header("Content-Type", "application/json")
+                  try:
+                      with urllib.request.urlopen(request) as response:
+                          payload = response.read().decode()
+                          return json.loads(payload) if payload else {}
+                  except urllib.error.HTTPError as error:
+                      details = error.read().decode()
+                      last_error = f"App Store Connect API {method} {path} failed ({error.code}): {details}"
+                      if error.code in (401, 429, 500, 502, 503, 504) and attempt < attempts:
+                          if error.code == 401:
+                              invalidate_token()
+                          print(f"{last_error} retrying {attempt}/{attempts - 1}", flush=True)
+                          time.sleep(min(30, 2 ** attempt))
+                          continue
+                      raise SystemExit(last_error)
+              raise SystemExit(last_error or f"App Store Connect API {method} {path} failed")
 
           if mode == "monitor":
               if not build_run_id: