fix(ai): 创意助手繁忙归类补 503/50508 与流式中断，失败日志保留尾部

线上日志（2026-10-21 18:10/18:50）显示失败节点已从出图节点移到最前面的「问题分类器」（SiliconFlow）：503 code 50508 System is too busy，以及 requests/urllib3 read_chunked 流式读取中断。旧归类只认 50500，用户看到的是「生成失败」而不是「生成服务繁忙」；且 briefUpstreamError 只留头部， Python traceback 的异常类型在尾部被截掉。 - isUpstreamCapacityFailure 增补 50508 / 503 / 流式中断等模式 - briefUpstreamError 改为头 2/3 + 标记 + 尾 1/3（仍单行、仍 <900 字符） - buildCreativeAssistantResult 在成功但无可展示内容时记 WARN（含 outputKeys 与 photo_files 条数），让解析兜底路径下一次可诊断 - 新增 AiCreativeBusyClassificationTest（6 条） issue 19；不恢复自动重试。
2026-10-21 19:09:03 +08:00
parent f4590001d8
commit 31eb75cdad
2 changed files with 367 additions and 2 deletions
@@ -0,0 +1,120 @@
+package com.gxwebsoft.ai.controller;
+
+import org.junit.jupiter.api.Test;
+
+import java.lang.reflect.Method;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+/**
+ * 创意生成失败文案的归类。
+ *
+ * <p>2026-10-21 线上日志（dev 实例 18:10 / 18:50 两例）显示：失败节点从
+ * 「即梦AI-图像生成」换成了最前面的「问题分类器」（LLM 节点，provider 为 SiliconFlow），
+ * 上游返回的是 503 / {@code code:50508 "System is too busy"} 与流式读取中断。
+ * 旧实现只认 {@code 50500} 与 {@code no more instances to retry}，
+ * 于是这两例都落到「生成失败，请稍后重试」——把上游繁忙说成用户内容的问题。
+ *
+ * <p>这里直接复刻 {@code creativeFailureAnswer} 的入口，锁住「哪些原文算繁忙」。
+ */
+class AiCreativeBusyClassificationTest {
+
+    /** 期望的繁忙文案（与 {@code CREATIVE_BUSY_MESSAGE} 同值）。 */
+    private static final String BUSY = "生成服务繁忙，请稍后重试";
+
+    /** 期望的通用失败文案（与 {@code CREATIVE_FAILED_MESSAGE} 同值）。 */
+    private static final String FAILED = "生成失败，请稍后重试";
+
+    /**
+     * 复刻调用入口：把上游 error 放进 {@code data.error}，交给私有的
+     * {@code creativeFailureAnswer(responseData)}。
+     */
+    private String answerFor(String upstreamError) throws Exception {
+        Map<String, Object> data = new LinkedHashMap<>();
+        data.put("status", "failed");
+        data.put("error", upstreamError);
+        Map<String, Object> responseData = new LinkedHashMap<>();
+        responseData.put("event", "workflow_finished");
+        responseData.put("data", data);
+
+        AiController controller = new AiController();
+        Method method = AiController.class.getDeclaredMethod("creativeFailureAnswer", Map.class);
+        method.setAccessible(true);
+        return String.valueOf(method.invoke(controller, responseData));
+    }
+
+    /** 2026-10-21 18:50 的真实原文：SiliconFlow 503 / 50508。 */
+    @Test
+    void 硅基流动503繁忙_归为繁忙文案() throws Exception {
+        String reason = "req_id: 1cdf48dd63 PluginInvokeError: {\"args\":{\"description\":\"[models] "
+                + "Error: API request failed with status code 503: {\"code\":50508,"
+                + "\"message\":\"System is too busy now. Please try again later.\",\"data\":null}\"}}";
+
+        assertEquals(BUSY, answerFor(reason));
+    }
+
+    /** 2026-10-21 18:10 的真实原文：流式响应读到一半被掐断（尾部才是异常类型）。 */
+    @Test
+    void 流式读取中断_归为繁忙文案() throws Exception {
+        String reason = "req_id: b0f0928ba8 PluginInvokeError: {\"args\":{\"traceback\":\"Traceback (most recent call last):\\n"
+                + "  File \\\"/app/.../requests/models.py\\\", line 937, in generate\\n"
+                + "    yield from self.raw.stream(chunk_size, decode_content=True)\\n"
+                + "  File \\\"/app/.../urllib3/response.py\\\", line 1260, in stream\\n"
+                + "    yield from self.read_chunked(amt, decode_content=decode_content)\\n"
+                + "requests.exceptions.ChunkedEncodingError: ('Connection broken: IncompleteRead(0 bytes read)')\"}";
+
+        assertEquals(BUSY, answerFor(reason));
+    }
+
+    /** 老规则仍然生效：图片工具没有可用实例。 */
+    @Test
+    void 即梦无可用实例_归为繁忙文案() throws Exception {
+        String reason = "{\"code\":50500,\"status_code\":110001,\"status_message\":\"no more instances to retry\"}";
+
+        assertEquals(BUSY, answerFor(reason));
+    }
+
+    /** 凭证/权限类失败不是繁忙，别把「去检查配置」说成「稍后再试」。 */
+    @Test
+    void 权限失败_仍为通用失败文案() throws Exception {
+        String reason = "req_id: dc688258de PluginInvokeError: [models] Error: API request failed with status code 403";
+
+        assertEquals(FAILED, answerFor(reason));
+    }
+
+    /** 无 error 字段时不能抛异常，按通用失败处理。 */
+    @Test
+    void 无error字段_按通用失败处理() throws Exception {
+        Map<String, Object> responseData = new LinkedHashMap<>();
+        responseData.put("data", new LinkedHashMap<String, Object>());
+
+        AiController controller = new AiController();
+        Method method = AiController.class.getDeclaredMethod("creativeFailureAnswer", Map.class);
+        method.setAccessible(true);
+
+        assertEquals(FAILED, String.valueOf(method.invoke(controller, responseData)));
+    }
+
+    /** 截断必须保留尾部：Python traceback 的异常类型只在最后一行。 */
+    @Test
+    void 超长上游原文_头尾都保留() throws Exception {
+        StringBuilder reason = new StringBuilder("HEAD_MARKER");
+        while (reason.length() < 900) {
+            reason.append(" middle-padding");
+        }
+        reason.append("ChunkedEncodingError: TAIL_MARKER");
+
+        AiController controller = new AiController();
+        Method method = AiController.class.getDeclaredMethod("briefUpstreamError", String.class);
+        method.setAccessible(true);
+        String brief = String.valueOf(method.invoke(null, reason.toString()));
+
+        org.junit.jupiter.api.Assertions.assertTrue(brief.startsWith("HEAD_MARKER"), brief);
+        org.junit.jupiter.api.Assertions.assertTrue(brief.endsWith("TAIL_MARKER"), brief);
+        org.junit.jupiter.api.Assertions.assertTrue(brief.contains("...(truncated)..."), brief);
+        org.junit.jupiter.api.Assertions.assertTrue(brief.length() < 900, "截断后仍应短：" + brief.length());
+        org.junit.jupiter.api.Assertions.assertFalse(brief.contains("\n"), "日志行不能带换行");
+    }
+}