fix: 售罄临时页仅下拉刷新一次 (#265)

client/src/pdd_u2_purchase_adapter.py

@@ -24,6 +24,7 @@ from .pdd_device_service import (
     PddDeviceService,
     current_thread_device_service,
 )
+from .pdd_goods_refresh import pull_down_to_refresh
 from .performance_timing import current_performance_trace
 from .pdd_collect_service import (
     PddCollectError,
@@ -32,7 +33,9 @@ from .pdd_collect_service import (
 )
 from .pdd_page_classifier import (
     ACTION_NETWORK_ERROR,
+    ACTION_OUT_OF_STOCK,
     ACTION_READY,
+    ACTION_REFRESH,
     ACTION_REOPEN,
     ACTION_UNAVAILABLE,
     PAGE_CAPTCHA,
@@ -1601,6 +1604,32 @@ class U2PddPurchaseAdapter(PddPurchaseAdapter):
                     if trace is not None:
                         trace.checkpoint("end_to_end_total")
                     return xml_data
+                if decision.action == ACTION_REFRESH:
+                    try:
+                        pull_down_to_refresh(device, root)
+                    except Exception as exc:
+                        raise PddPurchaseError(
+                            "PDD_PAGE_REFRESH_FAILED",
+                            f"商品售罄临时页无法安全下拉刷新：{exc}",
+                            step="purchase_open_goods",
+                            retryable=True,
+                            diagnostics={"page_reason": "out_of_stock"},
+                        ) from exc
+                    tracker.refreshed_out_of_stock(self._monotonic())
+                    self._sleep(0.5)
+                    last_recorded = ""
+                    continue
+                if decision.action == ACTION_OUT_OF_STOCK:
+                    raise PddPurchaseError(
+                        "PDD_GOODS_UNAVAILABLE",
+                        "商品下拉刷新后仍显示已售罄",
+                        step="purchase_open_goods",
+                        retryable=False,
+                        diagnostics={
+                            "page_reason": "out_of_stock",
+                            "refresh_attempts": 1,
+                        },
+                    )
                 if decision.action == ACTION_REOPEN:
                     with (
                         trace.stage("open_url_retry")