审计改用日志搜索倒序,支持检索与无配额租户回退

.trellis/spec/backend/index.md

@@ -20,6 +20,7 @@ Gin + GORM + SQLite(纯 Go 驱动 `glebarez/sqlite`,免 CGO;默认与推荐)+ AE
 | [Concurrency](./concurrency.md) | goroutine 生命周期与 context 传递 | 已填 |
 | [Testing](./testing.md) | table-driven 测试要求 | 已填 |
 | [Database Guidelines](./database-guidelines.md) | ORM 模式、查询、迁移 | 待填 |
+| [OCI Audit](./oci-audit.md) | 审计事件双通道数据源、检索语义与预算纪律 | 已填 |
 | [Logging Guidelines](./logging-guidelines.md) | 结构化日志、日志级别 | 待填 |
 
 ---

.trellis/spec/backend/oci-audit.md

@@ -0,0 +1,19 @@
+# OCI 审计事件集成约定
+
+> 2026-07 审计日志重构(数据源切换 + 检索 + 配额回退)沉淀;实现见 `internal/oci/audit.go`。
+
+## 数据源:双通道,Search 主路 + Audit API 回退
+
+- **Audit API(`audit.ListEvents`)无排序参数,窗口内固定按处理时间正序分页**。任何"从最新往更早"的列表需求禁止直接用它凑批——首批会拿到窗口内最旧的一段(2026-07-16 曾以此形态上线出 bug)。
+- 倒序列表一律走 **Logging Search**(`loggingsearch.SearchLogs`,`search "<tenancy>/_Audit" | ... | sort by datetime desc`)。硬约束:单次查询时间窗 ≤ 14 天、limit ≤ 1000、时间过滤基于**处理时间**而非发生时间。
+- **部分免费租户 Logging Search 服务配额为零**(报错含 `Rate limit exceeded` + `maxQueriesPerMinute: 0`,SDK 解析该错误体还会失败),属永久不可用,须自动回退 Audit API(小窗正序 + 前端全局重排);普通限流(配额非零)不回退。游标携带通道模式,续查不再试错。
+
+## 检索语义
+
+- `logContent = '*词*'` 是对整条日志 JSON **所有字段值**的包含匹配,会命中隐藏认证元数据(如 `opc-principal` 头里的 `ttype: login`),只可作服务端粗筛;**用户可见语义必须再做客户端精筛**(只匹配列表可见字段,不区分大小写,`*` 通配分段)。
+- 用户输入进检索语句前必须消毒(去引号/反斜杠/控制字符、截断),见 `SanitizeAuditTerm`。
+
+## 批式回溯的预算纪律
+
+- 单批双预算:页数(`maxAuditPages`)+ 时间(`auditBatchTimeBudget`≈20s)。全文检索命中稀疏时大窗扫描单页可达十余秒,没有时间预算会出现 3 分钟级单请求。
+- 空窗按倍增扩窗(上限受 14 天查询窗约束);响应回传 `scannedThrough` 供前端展示回溯进度,前端自动补批必须封顶,由用户显式继续。

docs/docs.go

@@ -1572,6 +1572,12 @@ const docTemplate = `{
                         "description": "单批目标条数,缺省 100,上限 200",
                         "name": "limit",
                         "in": "query"
+                    },
+                    {
+                        "type": "string",
+                        "description": "检索关键字(服务端全文匹配,支持 * 通配;仅首查生效)",
+                        "name": "q",
+                        "in": "query"
                     }
                 ],
                 "responses": {
@@ -9439,6 +9445,9 @@ const docTemplate = `{
                     "items": {
                         "$ref": "#/definitions/oci-portal_internal_oci.AuditEvent"
                     }
+                },
+                "scannedThrough": {
+                    "type": "string"
                 }
             }
         },

docs/swagger.json

@@ -1565,6 +1565,12 @@
                         "description": "单批目标条数,缺省 100,上限 200",
                         "name": "limit",
                         "in": "query"
+                    },
+                    {
+                        "type": "string",
+                        "description": "检索关键字(服务端全文匹配,支持 * 通配;仅首查生效)",
+                        "name": "q",
+                        "in": "query"
                     }
                 ],
                 "responses": {
@@ -9432,6 +9438,9 @@
                     "items": {
                         "$ref": "#/definitions/oci-portal_internal_oci.AuditEvent"
                     }
+                },
+                "scannedThrough": {
+                    "type": "string"
                 }
             }
         },

docs/swagger.yaml

@@ -2271,6 +2271,8 @@ definitions:
         items:
           $ref: '#/definitions/oci-portal_internal_oci.AuditEvent'
         type: array
+      scannedThrough:
+        type: string
     type: object
   oci-portal_internal_service.Changes:
     additionalProperties:
@@ -3637,6 +3639,10 @@ paths:
         in: query
         name: limit
         type: integer
+      - description: 检索关键字(服务端全文匹配,支持 * 通配;仅首查生效)
+        in: query
+        name: q
+        type: string
       responses:
         "200":
           description: OK

internal/api/tenant.go

@@ -68,13 +68,15 @@ func (h *ociConfigHandler) costs(c *gin.Context) {
 // ---- 租户审计日志 ----
 
 // getAuditEvents 批式懒加载查询审计事件:cursor 为空自当前时刻首查,
-// 非空从上次响应游标继续向更早回溯;limit 单批目标条数(缺省 100,上限 200)。
+// 非空从上次响应游标继续向更早回溯;limit 单批目标条数(缺省 100,上限 200);
+// q 为服务端全文检索关键字,仅首查生效,续查沿用游标内嵌关键字。
 //
 // @Summary  批式懒加载查询租户 OCI 审计事件
 // @Tags     租户 IAM
 // @Param    id path int true "配置 ID"
 // @Param    cursor query string false "续查游标(上次响应原样带回)"
 // @Param    limit query int false "单批目标条数,缺省 100,上限 200"
+// @Param    q query string false "检索关键字(服务端全文匹配,支持 * 通配;仅首查生效)"
 // @Success  200 {object} service.AuditEventsView
 // @Security BearerAuth
 // @Router   /api/v1/oci-configs/{id}/audit-events [get]
@@ -84,7 +86,7 @@ func (h *ociConfigHandler) getAuditEvents(c *gin.Context) {
 		return
 	}
 	limit, _ := strconv.Atoi(c.Query("limit"))
-	q := service.AuditQuery{Region: c.Query("region"), Cursor: c.Query("cursor"), Limit: limit}
+	q := service.AuditQuery{Region: c.Query("region"), Cursor: c.Query("cursor"), Limit: limit, Q: c.Query("q")}
 	result, err := h.svc.AuditEvents(c.Request.Context(), id, q)
 	if errors.Is(err, service.ErrInvalidAuditCursor) {
 		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})

internal/oci/audit.go

@@ -6,19 +6,29 @@ import (
 	"fmt"
 	"net"
 	"sort"
+	"strings"
 	"time"
 
 	"github.com/oracle/oci-go-sdk/v65/audit"
 	"github.com/oracle/oci-go-sdk/v65/common"
+	"github.com/oracle/oci-go-sdk/v65/loggingsearch"
 )
 
-// maxAuditPages 限制单次查询的翻页数:繁忙租户单日事件可上千,
+// maxAuditPages 限制单次查询的翻页数:每页最多 auditSearchPageLimit 条,
-// 到限即返回 Truncated=true,由调用方收窄时间窗。
+// 到限即截断(窗口式回传 Truncated,批式留游标),由调用方续查。
-// 默认过滤(噪声事件/内网发起)后有效结果变少,页数放宽到 10 缓解截断。
 const maxAuditPages = 10
 
+// auditBatchTimeBudget 是批式查询的单批耗时预算:全文检索命中稀疏时
+// 大窗扫描单页可达十余秒,超时即带游标返回,把长回溯拆成多个有界请求,
+// 前端按已回溯位置展示进度并自动续查。
+const auditBatchTimeBudget = 20 * time.Second
+
+// auditSearchPageLimit 是 SearchLogs 单页条数(API 上限 1000):批式查询
+// 攒满目标条数(~100)即携整页返回,页取 200 兼顾单页凑满一批与响应体量。
+const auditSearchPageLimit = 200
+
 // AuditEvent 是审计事件的列表精简视图;EventId 为 CloudEvents 全局唯一 id,
-// 详情反查的键。Raw 为 SDK 原始事件的 JSON 序列化,由 service 层剥离进缓存,
+// 详情反查的键。Raw 为 _Audit 日志 logContent 原文,由 service 层剥离进缓存,
 // 列表响应不再携带(详情接口按 eventId 取回)。
 type AuditEvent struct {
 	EventId         string          `json:"eventId"`
@@ -35,7 +45,7 @@ type AuditEvent struct {
 	Raw             json.RawMessage `json:"raw,omitempty"`
 }
 
-// AuditEventsResult 是一次审计查询的结果;Truncated 表示翻页到限被截断,
+// AuditEventsResult 是一次窗口式审计查询的结果;Truncated 表示翻页到限被截断,
 // 此时 NextPage 携带 opc-next-page 游标,同一时间窗回传可断点续翻。
 type AuditEventsResult struct {
 	Items     []AuditEvent `json:"items"`
@@ -43,6 +53,324 @@ type AuditEventsResult struct {
 	NextPage  string       `json:"nextPage,omitempty"`
 }
 
+// auditSearchClient 构造区域化的日志搜索客户端。审计数据源为 Logging Search
+// 的 _Audit 日志:Audit API 无排序参数、窗口内固定按处理时间正序,首批只能
+// 拿到窗口内最旧的一段;Logging Search 支持 datetime 倒序,才能从最新回溯。
+func (c *RealClient) auditSearchClient(cred Credentials, region string) (loggingsearch.LogSearchClient, error) {
+	sc, err := loggingsearch.NewLogSearchClientWithConfigurationProvider(provider(cred))
+	if err != nil {
+		return sc, fmt.Errorf("new logging search client: %w", err)
+	}
+	applyProxy(&sc.BaseClient, cred)
+	if region != "" {
+		sc.SetRegion(normalizeRegion(region))
+	}
+	return sc, nil
+}
+
+// auditSearchQuery 组装租户根 compartment 审计日志的倒序检索语句;
+// SummarizeMetricsData 遥测噪声占比高,服务端先滤一道减少无效翻页。
+// q 非空时追加 logContent 全文包含匹配——它扫的是整条 JSON 的所有值,只当
+// 粗筛;可见字段的精筛由 filterAuditTerm 兜底,避免隐藏元数据误命中。
+func auditSearchQuery(tenancyOCID, q string) string {
+	query := fmt.Sprintf("search %q | where data.eventName != 'SummarizeMetricsData'", tenancyOCID+"/_Audit")
+	if term := SanitizeAuditTerm(q); term != "" {
+		query += fmt.Sprintf(" and logContent = '*%s*'", term)
+	}
+	return query + " | sort by datetime desc"
+}
+
+// auditTermMaxLen 限制检索关键字长度,防止游标与查询语句被撑爆。
+const auditTermMaxLen = 100
+
+// SanitizeAuditTerm 归一检索关键字:去除引号/反斜杠/控制字符防语句注入
+// (查询目标已锁定本租户 _Audit 流,注入最坏只是语法错),截断超长输入;
+// 保留 * 供用户通配。返回空串表示不追加过滤子句。
+// service 构造首查游标与本包组装语句共用,对篡改游标二次消毒兜底。
+func SanitizeAuditTerm(q string) string {
+	out := make([]rune, 0, len(q))
+	for _, r := range q {
+		if r == '\'' || r == '"' || r == '\\' || r < 0x20 {
+			continue
+		}
+		out = append(out, r)
+		if len(out) >= auditTermMaxLen {
+			break
+		}
+	}
+	return strings.TrimSpace(string(out))
+}
+
+// ListAuditEvents 实现 Client:实时查询租户根 compartment 在 [start, end) 内的
+// 审计事件,最多翻 maxAuditPages 页,结果按发生时间倒序;纯读不落库。
+// page 非空时从该游标断点续翻(必须配同一时间窗);到限截断时回传 NextPage。
+// Search 配额为零的租户自动回退 Audit API 重查同一窗口(page 跨通道失效,重头吃窗)。
+func (c *RealClient) ListAuditEvents(ctx context.Context, cred Credentials, region string, start, end time.Time, page string) (AuditEventsResult, error) {
+	f := c.newAuditFetchers(cred, region)
+	res, err := listAuditWindow(ctx, f.search, AuditCursor{Start: start, End: end, Page: page})
+	if err != nil && isSearchQuotaZero(err) {
+		res, err = listAuditWindow(ctx, f.audit, AuditCursor{Start: start, End: end})
+	}
+	return res, err
+}
+
+// listAuditWindow 用给定取页函数吃一个固定时间窗,最多 maxAuditPages 页;
+// 页预算耗尽即截断,NextPage 携带未消费的窗内游标。
+func listAuditWindow(ctx context.Context, fetch auditPageFetch, cur AuditCursor) (AuditEventsResult, error) {
+	result := AuditEventsResult{Items: []AuditEvent{}}
+	for i := 0; i < maxAuditPages; i++ {
+		items, next, err := fetch(ctx, cur)
+		if err != nil {
+			return AuditEventsResult{}, err
+		}
+		result.Items = appendKeptAuditEvents(result.Items, items)
+		if next == "" {
+			sortAuditEvents(result.Items)
+			return result, nil
+		}
+		cur.Page = next
+	}
+	result.Truncated = true
+	result.NextPage = cur.Page
+	sortAuditEvents(result.Items)
+	return result, nil
+}
+
+// auditPageFetch 拉取游标位置的一页已映射事件,返回窗内下一页游标。
+type auditPageFetch func(ctx context.Context, cur AuditCursor) ([]AuditEvent, string, error)
+
+// auditFetchers 汇集两条数据通道:search 为 Logging Search 倒序主路,
+// audit 为 Search 配额为零租户的 Audit API 回退路。
+type auditFetchers struct {
+	search auditPageFetch
+	audit  auditPageFetch
+}
+
+// newAuditFetchers 构造两条通道的取页闭包;客户端惰性初始化,
+// 各模式的续查不会白建用不到的客户端。
+func (c *RealClient) newAuditFetchers(cred Credentials, region string) auditFetchers {
+	return auditFetchers{search: c.searchFetcher(cred, region), audit: c.auditAPIFetcher(cred, region)}
+}
+
+// searchFetcher 构造 Logging Search 通道的取页闭包。
+func (c *RealClient) searchFetcher(cred Credentials, region string) auditPageFetch {
+	var sc *loggingsearch.LogSearchClient
+	return func(ctx context.Context, cur AuditCursor) ([]AuditEvent, string, error) {
+		if sc == nil {
+			cli, err := c.auditSearchClient(cred, region)
+			if err != nil {
+				return nil, "", err
+			}
+			sc = &cli
+		}
+		return searchAuditPage(ctx, *sc, cred.TenancyOCID, cur)
+	}
+}
+
+// auditAPIFetcher 构造 Audit API 回退通道的取页闭包。
+func (c *RealClient) auditAPIFetcher(cred Credentials, region string) auditPageFetch {
+	var ac *audit.AuditClient
+	return func(ctx context.Context, cur AuditCursor) ([]AuditEvent, string, error) {
+		if ac == nil {
+			cli, err := c.auditClient(cred, region)
+			if err != nil {
+				return nil, "", err
+			}
+			ac = &cli
+		}
+		return listAuditPage(ctx, *ac, cred.TenancyOCID, cur)
+	}
+}
+
+// isSearchQuotaZero 识别「租户 Logging Search 配额为零」的失败:此类租户该
+// 服务永久不可用(maxQueriesPerMinute/maxConcurrentQueries 均为 0),应回退
+// Audit API;普通限流(配额非零)不回退,避免数据通道来回切换。
+func isSearchQuotaZero(err error) bool {
+	if err == nil {
+		return false
+	}
+	msg := strings.ToLower(strings.ReplaceAll(err.Error(), " ", ""))
+	return strings.Contains(msg, "ratelimitexceeded") && strings.Contains(msg, "maxqueriesperminute:0,")
+}
+
+// appendKeptAuditEvents 过滤噪声后追加一页已映射事件;窗口式与批式查询共用。
+func appendKeptAuditEvents(dst []AuditEvent, items []AuditEvent) []AuditEvent {
+	for _, ev := range items {
+		if keepAuditEvent(ev) {
+			dst = append(dst, ev)
+		}
+	}
+	return dst
+}
+
+// ---- 批式懒加载查询:分窗回溯 + 游标续查 ----
+
+// 批式查询参数:单批翻页预算沿用 maxAuditPages;首窗 24h,连续空窗倍增
+// 加速跨越闲置期,上限 14 天(Logging Search 单次查询时间窗硬限);
+// 回溯下限为审计事件保留期 365 天。
+const (
+	auditWindowHours    = 24
+	auditWindowMaxHours = 336
+	auditRetentionDays  = 365
+)
+
+// auditModeFallback 标记游标处于 Audit API 回退模式:部分租户的
+// Logging Search 服务配额为零(maxQueriesPerMinute: 0),永久不可用。
+const auditModeFallback = "a"
+
+// auditFallbackWindowHours 是回退模式的基准窗宽:Audit API 窗口内固定按
+// 处理时间正序且无排序参数,只能小窗回溯 + 前端全局重排保住从新到旧的体验。
+const auditFallbackWindowHours = 1
+
+// AuditCursor 是批式查询的续查位置:当前时间窗、窗内翻页游标、当前窗宽
+// (小时,空窗倍增的记忆)、检索关键字(随游标续查,保证跨批过滤一致)
+// 与数据通道模式(空为 Search 主路,"a" 为 Audit API 回退,续查沿用不再试错)。
+// 序列化为不透明 cursor 由 service 层负责。
+type AuditCursor struct {
+	Start       time.Time `json:"s"`
+	End         time.Time `json:"e"`
+	Page        string    `json:"p,omitempty"`
+	WindowHours int       `json:"w"`
+	Q           string    `json:"q,omitempty"`
+	M           string    `json:"m,omitempty"`
+}
+
+// toFallback 把游标切到 Audit API 回退模式:Search 页游标跨通道失效须清空;
+// 首窗收窄到基准窗宽,避免大窗正序分页又回到「首批全是窗口内最旧事件」的老问题。
+func (cur AuditCursor) toFallback() AuditCursor {
+	cur.M = auditModeFallback
+	cur.Page = ""
+	cur.WindowHours = auditFallbackWindowHours
+	if cur.End.Sub(cur.Start) > auditFallbackWindowHours*time.Hour {
+		cur.Start = cur.End.Add(-auditFallbackWindowHours * time.Hour)
+	}
+	return cur
+}
+
+// NewAuditCursor 构造首查游标:自 now 起回溯第一个 24h 窗。
+func NewAuditCursor(now time.Time) AuditCursor {
+	end := now.UTC().Truncate(time.Minute)
+	return AuditCursor{Start: end.Add(-auditWindowHours * time.Hour), End: end, WindowHours: auditWindowHours}
+}
+
+// advance 推进到紧邻更早的窗;empty 表示刚结束的窗无保留事件,窗宽倍增,
+// 否则重置为该模式基准窗宽。done 为 true 表示已越过保留期尽头。
+func (cur AuditCursor) advance(now time.Time, empty bool) (AuditCursor, bool) {
+	base := auditWindowHours
+	if cur.M == auditModeFallback {
+		base = auditFallbackWindowHours
+	}
+	w := cur.WindowHours
+	if w <= 0 {
+		w = base
+	}
+	if empty {
+		if w *= 2; w > auditWindowMaxHours {
+			w = auditWindowMaxHours
+		}
+	} else {
+		w = base
+	}
+	end := cur.Start
+	if end.Before(now.UTC().AddDate(0, 0, -auditRetentionDays)) {
+		return cur, true
+	}
+	return AuditCursor{Start: end.Add(-time.Duration(w) * time.Hour), End: end, WindowHours: w, Q: cur.Q, M: cur.M}, false
+}
+
+// AuditBatchResult 是一批懒加载结果;Cursor 为 nil 且 Exhausted 为 true
+// 表示已回溯到保留期尽头,无更早数据。
+type AuditBatchResult struct {
+	Items     []AuditEvent
+	Cursor    *AuditCursor
+	Exhausted bool
+}
+
+// ListAuditEventsBatch 实现 Client:从 cur 位置向更早方向收集约 limit 条
+// 保留事件;单批受页预算与时间预算双重约束,不足额也返回,由前端按需续查。
+// 倒序返回下,窗口不重叠 + 窗内游标续翻保证跨批不重不漏。
+func (c *RealClient) ListAuditEventsBatch(ctx context.Context, cred Credentials, region string, cur AuditCursor, limit int) (AuditBatchResult, error) {
+	return listAuditBatch(ctx, c.newAuditFetchers(cred, region), cur, limit)
+}
+
+// listAuditBatch 是批式回溯的通道无关内核,取页函数注入便于测试。
+func listAuditBatch(ctx context.Context, f auditFetchers, cur AuditCursor, limit int) (AuditBatchResult, error) {
+	res := AuditBatchResult{Items: []AuditEvent{}}
+	windowHasKept := false
+	deadline := time.Now().Add(auditBatchTimeBudget)
+	for budget := maxAuditPages; budget > 0 && len(res.Items) < limit && time.Now().Before(deadline); budget-- {
+		items, next, nextCur, err := fetchAuditPage(ctx, f, cur)
+		if err != nil {
+			return AuditBatchResult{}, err
+		}
+		cur = nextCur
+		before := len(res.Items)
+		res.Items = appendKeptAuditEvents(res.Items, filterAuditTerm(items, cur))
+		windowHasKept = windowHasKept || len(res.Items) > before
+		if next != "" {
+			cur.Page = next
+			continue
+		}
+		adv, done := cur.advance(time.Now(), !windowHasKept)
+		if done {
+			res.Exhausted = true
+			sortAuditEvents(res.Items)
+			return res, nil
+		}
+		cur, windowHasKept = adv, false
+	}
+	sortAuditEvents(res.Items)
+	res.Cursor = &cur
+	return res, nil
+}
+
+// fetchAuditPage 按游标模式取一页;Search 主路报「配额为零」时切到回退游标
+// 并立即用 Audit API 重试,后续批次凭游标模式直达回退通道不再试错。
+func fetchAuditPage(ctx context.Context, f auditFetchers, cur AuditCursor) ([]AuditEvent, string, AuditCursor, error) {
+	if cur.M == auditModeFallback {
+		items, next, err := f.audit(ctx, cur)
+		return items, next, cur, err
+	}
+	items, next, err := f.search(ctx, cur)
+	if err != nil && isSearchQuotaZero(err) {
+		cur = cur.toFallback()
+		items, next, err = f.audit(ctx, cur)
+	}
+	return items, next, cur, err
+}
+
+// filterAuditTerm 关键字精筛:只认列表可见字段(matchesAuditTerm),两条通道
+// 语义一致。Search 主路的 logContent 全文条件会命中隐藏认证元数据(如
+// opc-principal 头里的 ttype:login),只作粗筛减少翻页,不作为最终判定。
+func filterAuditTerm(items []AuditEvent, cur AuditCursor) []AuditEvent {
+	if cur.Q == "" {
+		return items
+	}
+	out := items[:0]
+	for _, ev := range items {
+		if matchesAuditTerm(ev, cur.Q) {
+			out = append(out, ev)
+		}
+	}
+	return out
+}
+
+// matchesAuditTerm 判断事件是否命中关键字:不区分大小写的包含匹配,
+// * 作为通配分段、各段都出现即命中,近似 Search 通道的 logContent 语义。
+func matchesAuditTerm(ev AuditEvent, q string) bool {
+	hay := strings.ToLower(strings.Join([]string{
+		ev.EventName, ev.Source, ev.ResourceName, ev.CompartmentName,
+		ev.PrincipalName, ev.IPAddress, ev.Status, ev.RequestAction, ev.RequestPath,
+	}, "\n"))
+	for _, part := range strings.Split(strings.ToLower(q), "*") {
+		if part != "" && !strings.Contains(hay, part) {
+			return false
+		}
+	}
+	return true
+}
+
+// auditClient 构造区域化的 Audit API 客户端(回退通道)。
 func (c *RealClient) auditClient(cred Credentials, region string) (audit.AuditClient, error) {
 	ac, err := audit.NewAuditClientWithConfigurationProvider(provider(cred))
 	if err != nil {
@@ -55,153 +383,10 @@ func (c *RealClient) auditClient(cred Credentials, region string) (audit.AuditCl
 	return ac, nil
 }
 
-// ListAuditEvents 实现 Client:实时查询租户根 compartment 在 [start, end) 内的
+// listAuditPage 拉取窗口内一页 Audit API 原始事件并压平;该 API 窗口内固定
-// 审计事件,最多翻 maxAuditPages 页,结果按发生时间倒序;纯读不落库。
+// 正序且只接受分钟粒度(起止秒与毫秒必须为 0)。Raw 为 SDK 事件原文,
-// page 非空时从该游标断点续翻(必须配同一时间窗);到限截断时回传 NextPage。
+// 与 Search 通道的 logContent 形态不同,详情弹窗均按任意 JSON 渲染。
-func (c *RealClient) ListAuditEvents(ctx context.Context, cred Credentials, region string, start, end time.Time, page string) (AuditEventsResult, error) {
+func listAuditPage(ctx context.Context, ac audit.AuditClient, tenancyOCID string, cur AuditCursor) ([]AuditEvent, string, error) {
-	ac, err := c.auditClient(cred, region)
-	if err != nil {
-		return AuditEventsResult{}, err
-	}
-	// Audit API 只接受分钟粒度：起止时间的秒与毫秒必须为 0
-	req := audit.ListEventsRequest{
-		CompartmentId: &cred.TenancyOCID,
-		StartTime:     &common.SDKTime{Time: start.UTC().Truncate(time.Minute)},
-		EndTime:       &common.SDKTime{Time: end.UTC().Truncate(time.Minute)},
-	}
-	if page != "" {
-		req.Page = &page
-	}
-	result := AuditEventsResult{Items: []AuditEvent{}}
-	for i := 0; i < maxAuditPages; i++ {
-		resp, err := ac.ListEvents(ctx, req)
-		if err != nil {
-			return AuditEventsResult{}, fmt.Errorf("list audit events: %w", err)
-		}
-		appendAuditEvents(&result, resp.Items)
-		if resp.OpcNextPage == nil {
-			sortAuditEvents(result.Items)
-			return result, nil
-		}
-		req.Page = resp.OpcNextPage
-	}
-	result.Truncated = true
-	result.NextPage = deref(req.Page)
-	sortAuditEvents(result.Items)
-	return result, nil
-}
-
-// appendAuditEvents 过滤噪声后追加一页事件;原始事件只对保留条目序列化。
-func appendAuditEvents(result *AuditEventsResult, items []audit.AuditEvent) {
-	result.Items = appendKeptAuditEvents(result.Items, items)
-}
-
-// appendKeptAuditEvents 是过滤追加的通用形态,窗口式与批式查询共用。
-func appendKeptAuditEvents(dst []AuditEvent, items []audit.AuditEvent) []AuditEvent {
-	for _, ev := range items {
-		out := toAuditEvent(ev)
-		if !keepAuditEvent(out) {
-			continue
-		}
-		if raw, mErr := json.Marshal(ev); mErr == nil {
-			out.Raw = raw
-		}
-		dst = append(dst, out)
-	}
-	return dst
-}
-
-// ---- 批式懒加载查询:分窗回溯 + 游标续查 ----
-
-// 批式查询参数:单批 OCI 翻页预算沿用 maxAuditPages;首窗 24h,
-// 连续空窗倍增(上限 30 天)加速跨越闲置期;回溯下限为事件保留期 365 天。
-const (
-	auditWindowHours    = 24
-	auditWindowMaxHours = 720
-	auditRetentionDays  = 365
-)
-
-// AuditCursor 是批式查询的续查位置:当前时间窗、窗内 OCI 翻页游标
-// 与当前窗宽(小时,空窗倍增的记忆)。序列化为不透明 cursor 由 service 层负责。
-type AuditCursor struct {
-	Start       time.Time `json:"s"`
-	End         time.Time `json:"e"`
-	Page        string    `json:"p,omitempty"`
-	WindowHours int       `json:"w"`
-}
-
-// NewAuditCursor 构造首查游标:自 now 起回溯第一个 24h 窗。
-func NewAuditCursor(now time.Time) AuditCursor {
-	end := now.UTC().Truncate(time.Minute)
-	return AuditCursor{Start: end.Add(-auditWindowHours * time.Hour), End: end, WindowHours: auditWindowHours}
-}
-
-// advance 推进到紧邻更早的窗;empty 表示刚结束的窗无保留事件,窗宽倍增,
-// 否则重置 24h。done 为 true 表示已越过保留期尽头。
-func (cur AuditCursor) advance(now time.Time, empty bool) (AuditCursor, bool) {
-	w := cur.WindowHours
-	if w <= 0 {
-		w = auditWindowHours
-	}
-	if empty {
-		if w *= 2; w > auditWindowMaxHours {
-			w = auditWindowMaxHours
-		}
-	} else {
-		w = auditWindowHours
-	}
-	end := cur.Start
-	if end.Before(now.UTC().AddDate(0, 0, -auditRetentionDays)) {
-		return cur, true
-	}
-	return AuditCursor{Start: end.Add(-time.Duration(w) * time.Hour), End: end, WindowHours: w}, false
-}
-
-// AuditBatchResult 是一批懒加载结果;Cursor 为 nil 且 Exhausted 为 true
-// 表示已回溯到保留期尽头,无更早数据。
-type AuditBatchResult struct {
-	Items     []AuditEvent
-	Cursor    *AuditCursor
-	Exhausted bool
-}
-
-// ListAuditEventsBatch 实现 Client:从 cur 位置向更早方向收集约 limit 条
-// 保留事件;单批最多消费 maxAuditPages 页 OCI 调用,不足额也按预算返回,
-// 由前端按需续查。窗口不重叠 + 窗内游标续翻保证跨批不重不漏。
-func (c *RealClient) ListAuditEventsBatch(ctx context.Context, cred Credentials, region string, cur AuditCursor, limit int) (AuditBatchResult, error) {
-	ac, err := c.auditClient(cred, region)
-	if err != nil {
-		return AuditBatchResult{}, err
-	}
-	res := AuditBatchResult{Items: []AuditEvent{}}
-	windowHasKept := false
-	for budget := maxAuditPages; budget > 0 && len(res.Items) < limit; budget-- {
-		items, next, err := listAuditPage(ctx, ac, cred.TenancyOCID, cur)
-		if err != nil {
-			return AuditBatchResult{}, err
-		}
-		before := len(res.Items)
-		res.Items = appendKeptAuditEvents(res.Items, items)
-		windowHasKept = windowHasKept || len(res.Items) > before
-		if next != "" {
-			cur.Page = next
-			continue
-		}
-		nextCur, done := cur.advance(time.Now(), !windowHasKept)
-		if done {
-			res.Exhausted = true
-			sortAuditEvents(res.Items)
-			return res, nil
-		}
-		cur, windowHasKept = nextCur, false
-	}
-	sortAuditEvents(res.Items)
-	res.Cursor = &cur
-	return res, nil
-}
-
-// listAuditPage 拉取当前游标位置的一页原始事件。
-func listAuditPage(ctx context.Context, ac audit.AuditClient, tenancyOCID string, cur AuditCursor) ([]audit.AuditEvent, string, error) {
 	req := audit.ListEventsRequest{
 		CompartmentId: &tenancyOCID,
 		StartTime:     &common.SDKTime{Time: cur.Start.UTC().Truncate(time.Minute)},
@@ -214,42 +399,18 @@ func listAuditPage(ctx context.Context, ac audit.AuditClient, tenancyOCID string
 	if err != nil {
 		return nil, "", fmt.Errorf("list audit events: %w", err)
 	}
-	return resp.Items, deref(resp.OpcNextPage), nil
+	items := make([]AuditEvent, 0, len(resp.Items))
-}
+	for _, ev := range resp.Items {
-
+		out := toAuditEvent(ev)
-// auditInternalCIDRs 是 OCI 服务内部互调的发起方网段(RFC1918 + CGNAT)。
+		if raw, mErr := json.Marshal(ev); mErr == nil {
-var auditInternalCIDRs = func() []*net.IPNet {
+			out.Raw = raw
-	out := make([]*net.IPNet, 0, 4)
-	for _, cidr := range []string{"10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16", "100.64.0.0/10"} {
-		_, block, _ := net.ParseCIDR(cidr)
-		out = append(out, block)
-	}
-	return out
-}()
-
-// keepAuditEvent 保留有展示价值的事件:Audit API 无服务端过滤参数(仅时间窗),
-// 在翻页循环内排除高频遥测噪声(SummarizeMetricsData)与内网地址发起的服务互调;
-// 无 IP 的事件(控制面内部)保留。
-func keepAuditEvent(ev AuditEvent) bool {
-	if ev.EventName == "SummarizeMetricsData" {
-		return false
-	}
-	if ev.IPAddress == "" {
-		return true
-	}
-	ip := net.ParseIP(ev.IPAddress)
-	if ip == nil {
-		return true
-	}
-	for _, block := range auditInternalCIDRs {
-		if block.Contains(ip) {
-			return false
 		}
+		items = append(items, out)
 	}
-	return true
+	return items, deref(resp.OpcNextPage), nil
 }
 
-// toAuditEvent 把 SDK 审计事件压平为列表 DTO；SDK 字段全为指针，逐层判 nil。
+// toAuditEvent 把 Audit SDK 事件压平为列表 DTO;SDK 字段全为指针,逐层判 nil。
 func toAuditEvent(ev audit.AuditEvent) AuditEvent {
 	out := AuditEvent{EventId: deref(ev.EventId), Source: deref(ev.Source)}
 	if ev.EventTime != nil {
@@ -275,6 +436,130 @@ func toAuditEvent(ev audit.AuditEvent) AuditEvent {
 	return out
 }
 
+// searchAuditPage 拉取游标窗口内按 datetime 倒序的一页审计事件(已映射未过滤)。
+func searchAuditPage(ctx context.Context, sc loggingsearch.LogSearchClient, tenancyOCID string, cur AuditCursor) ([]AuditEvent, string, error) {
+	req := loggingsearch.SearchLogsRequest{
+		SearchLogsDetails: loggingsearch.SearchLogsDetails{
+			TimeStart:   &common.SDKTime{Time: cur.Start.UTC().Truncate(time.Minute)},
+			TimeEnd:     &common.SDKTime{Time: cur.End.UTC().Truncate(time.Minute)},
+			SearchQuery: common.String(auditSearchQuery(tenancyOCID, cur.Q)),
+		},
+		Limit: common.Int(auditSearchPageLimit),
+	}
+	if cur.Page != "" {
+		req.Page = &cur.Page
+	}
+	resp, err := sc.SearchLogs(ctx, req)
+	if err != nil {
+		return nil, "", fmt.Errorf("search audit logs: %w", err)
+	}
+	items := make([]AuditEvent, 0, len(resp.Results))
+	for _, r := range resp.Results {
+		if ev, ok := toSearchAuditEvent(r); ok {
+			items = append(items, ev)
+		}
+	}
+	return items, deref(resp.OpcNextPage), nil
+}
+
+// auditInternalCIDRs 是 OCI 服务内部互调的发起方网段(RFC1918 + CGNAT)。
+var auditInternalCIDRs = func() []*net.IPNet {
+	out := make([]*net.IPNet, 0, 4)
+	for _, cidr := range []string{"10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16", "100.64.0.0/10"} {
+		_, block, _ := net.ParseCIDR(cidr)
+		out = append(out, block)
+	}
+	return out
+}()
+
+// keepAuditEvent 保留有展示价值的事件:SummarizeMetricsData 已在检索语句里
+// 先滤(此处兜底),内网地址发起的服务互调用 CIDR 判断(查询语言不便表达);
+// 无 IP 的事件(控制面内部)保留。
+func keepAuditEvent(ev AuditEvent) bool {
+	if ev.EventName == "SummarizeMetricsData" {
+		return false
+	}
+	if ev.IPAddress == "" {
+		return true
+	}
+	ip := net.ParseIP(ev.IPAddress)
+	if ip == nil {
+		return true
+	}
+	for _, block := range auditInternalCIDRs {
+		if block.Contains(ip) {
+			return false
+		}
+	}
+	return true
+}
+
+// searchAuditContent 是 _Audit 日志 logContent 的字段投影,只取列表展示所需;
+// identity / request / response 可能为 null,零值即缺省。
+type searchAuditContent struct {
+	ID     string     `json:"id"`
+	Time   *time.Time `json:"time"`
+	Source string     `json:"source"`
+	Data   struct {
+		EventName       string `json:"eventName"`
+		ResourceName    string `json:"resourceName"`
+		CompartmentName string `json:"compartmentName"`
+		Identity        struct {
+			PrincipalName string `json:"principalName"`
+			IPAddress     string `json:"ipAddress"`
+		} `json:"identity"`
+		Request struct {
+			Action string `json:"action"`
+			Path   string `json:"path"`
+		} `json:"request"`
+		Response struct {
+			Status string `json:"status"`
+		} `json:"response"`
+	} `json:"data"`
+}
+
+// toSearchAuditEvent 把日志搜索结果压平为列表 DTO;Raw 即 logContent 原文。
+// 结构不符的条目丢弃(返回 false),不因单条脏数据整页失败。
+func toSearchAuditEvent(r loggingsearch.SearchResult) (AuditEvent, bool) {
+	if r.Data == nil {
+		return AuditEvent{}, false
+	}
+	b, err := json.Marshal(r.Data)
+	if err != nil {
+		return AuditEvent{}, false
+	}
+	var hit struct {
+		LogContent json.RawMessage `json:"logContent"`
+	}
+	if err := json.Unmarshal(b, &hit); err != nil || len(hit.LogContent) == 0 {
+		return AuditEvent{}, false
+	}
+	var content searchAuditContent
+	if err := json.Unmarshal(hit.LogContent, &content); err != nil {
+		return AuditEvent{}, false
+	}
+	ev := searchContentToEvent(content)
+	ev.Raw = hit.LogContent
+	return ev, true
+}
+
+// searchContentToEvent 把投影字段填入列表 DTO;Raw 由调用方设置。
+func searchContentToEvent(c searchAuditContent) AuditEvent {
+	return AuditEvent{
+		EventId:         c.ID,
+		EventTime:       c.Time,
+		EventName:       c.Data.EventName,
+		Source:          c.Source,
+		ResourceName:    c.Data.ResourceName,
+		CompartmentName: c.Data.CompartmentName,
+		PrincipalName:   c.Data.Identity.PrincipalName,
+		IPAddress:       c.Data.Identity.IPAddress,
+		Status:          c.Data.Response.Status,
+		RequestAction:   c.Data.Request.Action,
+		RequestPath:     c.Data.Request.Path,
+	}
+}
+
 // sortAuditEvents 按发生时间倒序排列；服务端返回顺序不保证，nil 时间排最后。
 func sortAuditEvents(items []AuditEvent) {
 	sort.SliceStable(items, func(i, j int) bool {

internal/oci/audit_test.go

@@ -1,14 +1,262 @@
 package oci
 
 import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
 	"reflect"
+	"strings"
 	"testing"
 	"time"
 
 	"github.com/oracle/oci-go-sdk/v65/audit"
 	"github.com/oracle/oci-go-sdk/v65/common"
+	"github.com/oracle/oci-go-sdk/v65/loggingsearch"
 )
 
+// quotaZeroErr 复刻 Search 配额为零租户的真实报错(SDK 解析错误体失败后带原文)。
+var quotaZeroErr = errors.New(`search audit logs: Failed to parse json from response body due to: json: cannot unmarshal number into Go struct field servicefailure.code of type string. With response body { "code" : 500, "message" : "Rate limit exceeded for ocid: ocid1.tenancy..x, maxQueriesPerMinute: 0, maxConcurrentQueries: 0" }.`)
+
+func TestIsSearchQuotaZero(t *testing.T) {
+	cases := []struct {
+		name string
+		err  error
+		want bool
+	}{
+		{"配额为零真实报错", quotaZeroErr, true},
+		{"普通限流不回退", errors.New(`Rate limit exceeded for ocid: x, maxQueriesPerMinute: 60, maxConcurrentQueries: 2`), false},
+		{"其他错误", errors.New("service unavailable"), false},
+		{"nil", nil, false},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			if got := isSearchQuotaZero(tc.err); got != tc.want {
+				t.Fatalf("isSearchQuotaZero() = %v, want %v", got, tc.want)
+			}
+		})
+	}
+}
+
+func TestListAuditBatchFallback(t *testing.T) {
+	et := time.Now().UTC().Add(-10 * time.Minute)
+	searchCalls, auditCalls := 0, 0
+	f := auditFetchers{
+		search: func(context.Context, AuditCursor) ([]AuditEvent, string, error) {
+			searchCalls++
+			return nil, "", quotaZeroErr
+		},
+		audit: func(_ context.Context, cur AuditCursor) ([]AuditEvent, string, error) {
+			auditCalls++
+			if cur.M != auditModeFallback || cur.Page != "" {
+				t.Fatalf("回退通道应携带模式标记且清空页游标, got %+v", cur)
+			}
+			ev := AuditEvent{EventId: fmt.Sprint(auditCalls), EventName: "GetInstance", EventTime: &et}
+			return []AuditEvent{ev}, "", nil
+		},
+	}
+	res, err := listAuditBatch(context.Background(), f, NewAuditCursor(time.Now()), 3)
+	if err != nil {
+		t.Fatalf("配额为零应回退成功, got %v", err)
+	}
+	if searchCalls != 1 {
+		t.Fatalf("Search 只应试错一次, got %d", searchCalls)
+	}
+	if len(res.Items) < 3 || auditCalls < 3 {
+		t.Fatalf("回退后应继续凑批, items=%d auditCalls=%d", len(res.Items), auditCalls)
+	}
+	if res.Cursor == nil || res.Cursor.M != auditModeFallback || res.Cursor.WindowHours != auditFallbackWindowHours {
+		t.Fatalf("续查游标应保持回退模式与基准窗宽, got %+v", res.Cursor)
+	}
+}
+
+func TestListAuditBatchFallbackCursorSkipsSearch(t *testing.T) {
+	et := time.Now().UTC().Add(-10 * time.Minute)
+	f := auditFetchers{
+		search: func(context.Context, AuditCursor) ([]AuditEvent, string, error) {
+			t.Fatal("回退模式游标不应再调用 Search 通道")
+			return nil, "", nil
+		},
+		audit: func(context.Context, AuditCursor) ([]AuditEvent, string, error) {
+			return []AuditEvent{{EventId: "e1", EventName: "GetVcn", EventTime: &et}}, "", nil
+		},
+	}
+	cur := NewAuditCursor(time.Now()).toFallback()
+	if _, err := listAuditBatch(context.Background(), f, cur, 1); err != nil {
+		t.Fatalf("回退模式续查失败: %v", err)
+	}
+}
+
+func TestListAuditBatchSearchErrorNoFallback(t *testing.T) {
+	f := auditFetchers{
+		search: func(context.Context, AuditCursor) ([]AuditEvent, string, error) {
+			return nil, "", errors.New("search audit logs: timeout")
+		},
+		audit: func(context.Context, AuditCursor) ([]AuditEvent, string, error) {
+			t.Fatal("普通错误不应触发回退")
+			return nil, "", nil
+		},
+	}
+	if _, err := listAuditBatch(context.Background(), f, NewAuditCursor(time.Now()), 1); err == nil {
+		t.Fatal("普通错误应原样上抛")
+	}
+}
+
+func TestFilterAuditTerm(t *testing.T) {
+	login := AuditEvent{EventId: "e1", EventName: "InteractiveLogin"}
+	noise := AuditEvent{EventId: "e2", EventName: "ListRecommendations"}
+	items := []AuditEvent{login, noise}
+	cases := []struct {
+		name string
+		cur  AuditCursor
+		want int
+	}{
+		{"无关键字原样放行", AuditCursor{}, 2},
+		{"Search 主路也精筛可见字段", AuditCursor{Q: "login"}, 1},
+		{"回退模式精筛", AuditCursor{Q: "login", M: auditModeFallback}, 1},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			if got := filterAuditTerm(append([]AuditEvent{}, items...), tc.cur); len(got) != tc.want {
+				t.Fatalf("filterAuditTerm() 保留 %d 条, want %d", len(got), tc.want)
+			}
+		})
+	}
+}
+
+func TestListAuditBatchSearchTermPrecision(t *testing.T) {
+	et := time.Now().UTC().Add(-10 * time.Minute)
+	// 模拟 Search 主路粗筛后仍混入的隐藏元数据误命中(如 ttype:login)
+	f := auditFetchers{
+		search: func(_ context.Context, cur AuditCursor) ([]AuditEvent, string, error) {
+			return []AuditEvent{
+				{EventId: "hit", EventName: "InteractiveLogin", EventTime: &et},
+				{EventId: "noise1", EventName: "ListRecommendations", EventTime: &et},
+				{EventId: "noise2", EventName: "SearchLogs", EventTime: &et},
+			}, "", nil
+		},
+		audit: func(context.Context, AuditCursor) ([]AuditEvent, string, error) {
+			t.Fatal("Search 正常时不应走回退")
+			return nil, "", nil
+		},
+	}
+	cur := NewAuditCursor(time.Now())
+	cur.Q = "login"
+	res, err := listAuditBatch(context.Background(), f, cur, 1)
+	if err != nil {
+		t.Fatalf("listAuditBatch() err = %v", err)
+	}
+	if len(res.Items) != 1 || res.Items[0].EventId != "hit" {
+		t.Fatalf("应只保留可见字段命中的事件, got %+v", res.Items)
+	}
+}
+
+func TestMatchesAuditTerm(t *testing.T) {
+	ev := AuditEvent{EventName: "ListVnicAttachments", ResourceName: "web-1", PrincipalName: "Vivien", IPAddress: "1.2.3.4"}
+	cases := []struct {
+		name string
+		q    string
+		want bool
+	}{
+		{"不区分大小写", "listvnic", true},
+		{"通配分段都出现", "List*Attachments", true},
+		{"资源名命中", "WEB-1", true},
+		{"未命中", "TerminateInstance", false},
+		{"通配缺段不命中", "List*Volume", false},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			if got := matchesAuditTerm(ev, tc.q); got != tc.want {
+				t.Fatalf("matchesAuditTerm(%q) = %v, want %v", tc.q, got, tc.want)
+			}
+		})
+	}
+}
+
+// searchResultFromJSON 把 JSON 文本构造成 SearchLogs 单条结果(Data 为 interface{})。
+func searchResultFromJSON(t *testing.T, s string) loggingsearch.SearchResult {
+	t.Helper()
+	var v interface{}
+	if err := json.Unmarshal([]byte(s), &v); err != nil {
+		t.Fatalf("fixture 不是合法 JSON: %v", err)
+	}
+	return loggingsearch.SearchResult{Data: &v}
+}
+
+func TestToSearchAuditEvent(t *testing.T) {
+	eventTime := time.Date(2026, 7, 6, 10, 30, 0, 0, time.UTC)
+	tests := []struct {
+		name   string
+		data   string
+		wantOK bool
+		want   AuditEvent
+	}{
+		{
+			name: "全字段齐全",
+			data: `{"datetime":1783074600000,"logContent":{
+				"id":"evt-abc","time":"2026-07-06T10:30:00Z","source":"ComputeApi",
+				"data":{"eventName":"TerminateInstance","resourceName":"web-1","compartmentName":"prod",
+					"identity":{"principalName":"api-admin","ipAddress":"1.2.3.4"},
+					"request":{"action":"DELETE","path":"/20160918/instances/ocid1..."},
+					"response":{"status":"204"}}}}`,
+			wantOK: true,
+			want: AuditEvent{
+				EventId:         "evt-abc",
+				EventTime:       &eventTime,
+				EventName:       "TerminateInstance",
+				Source:          "ComputeApi",
+				ResourceName:    "web-1",
+				CompartmentName: "prod",
+				PrincipalName:   "api-admin",
+				IPAddress:       "1.2.3.4",
+				Status:          "204",
+				RequestAction:   "DELETE",
+				RequestPath:     "/20160918/instances/ocid1...",
+			},
+		},
+		{
+			name: "identity/request/response 为 null 时只保留信封字段",
+			data: `{"logContent":{"id":"evt-x","time":"2026-07-06T10:30:00Z","source":"VcnApi",
+				"data":{"eventName":"GetVcn","identity":null,"request":null,"response":null}}}`,
+			wantOK: true,
+			want:   AuditEvent{EventId: "evt-x", EventTime: &eventTime, Source: "VcnApi", EventName: "GetVcn"},
+		},
+		{
+			name:   "缺 logContent 丢弃",
+			data:   `{"datetime":1783074600000}`,
+			wantOK: false,
+		},
+		{
+			name:   "logContent 结构不符丢弃",
+			data:   `{"logContent":"plain-text"}`,
+			wantOK: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, ok := toSearchAuditEvent(searchResultFromJSON(t, tt.data))
+			if ok != tt.wantOK {
+				t.Fatalf("ok = %v, want %v", ok, tt.wantOK)
+			}
+			if !ok {
+				return
+			}
+			if len(got.Raw) == 0 {
+				t.Fatalf("Raw 应携带 logContent 原文")
+			}
+			if !auditEventEqual(got, tt.want) {
+				t.Errorf("toSearchAuditEvent() = %+v, want %+v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestToSearchAuditEventNilData(t *testing.T) {
+	if _, ok := toSearchAuditEvent(loggingsearch.SearchResult{}); ok {
+		t.Fatal("Data 为 nil 应丢弃")
+	}
+}
+
 func TestToAuditEvent(t *testing.T) {
 	eventTime := time.Date(2026, 7, 6, 10, 30, 0, 0, time.UTC)
 	tests := []struct {
@@ -38,44 +286,23 @@ func TestToAuditEvent(t *testing.T) {
 				},
 			},
 			want: AuditEvent{
-				EventId:         "evt-abc",
+				EventId: "evt-abc", EventTime: &eventTime, EventName: "TerminateInstance",
-				EventTime:       &eventTime,
+				Source: "ComputeApi", ResourceName: "web-1", CompartmentName: "prod",
-				EventName:       "TerminateInstance",
+				PrincipalName: "api-admin", IPAddress: "1.2.3.4", Status: "204",
-				Source:          "ComputeApi",
+				RequestAction: "DELETE", RequestPath: "/20160918/instances/ocid1...",
-				ResourceName:    "web-1",
-				CompartmentName: "prod",
-				PrincipalName:   "api-admin",
-				IPAddress:       "1.2.3.4",
-				Status:          "204",
-				RequestAction:   "DELETE",
-				RequestPath:     "/20160918/instances/ocid1...",
 			},
 		},
-		{
-			name: "Data 为 nil 时只保留信封字段",
-			ev: audit.AuditEvent{
-				Source:    common.String("VcnApi"),
-				EventTime: &common.SDKTime{Time: eventTime},
-			},
-			want: AuditEvent{EventTime: &eventTime, Source: "VcnApi"},
-		},
 		{
 			name: "嵌套局部 nil 各自安全跳过",
 			ev: audit.AuditEvent{
 				Data: &audit.Data{
 					EventName: common.String("GetInstance"),
-					Identity:  nil,
 					Request:   &audit.Request{Path: common.String("/instances")},
-					Response:  nil,
 				},
 			},
 			want: AuditEvent{EventName: "GetInstance", RequestPath: "/instances"},
 		},
-		{
+		{name: "空事件全部零值", ev: audit.AuditEvent{}, want: AuditEvent{}},
-			name: "空事件全部零值",
-			ev:   audit.AuditEvent{},
-			want: AuditEvent{},
-		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
@@ -86,6 +313,37 @@ func TestToAuditEvent(t *testing.T) {
 	}
 }
 
+func TestAuditSearchQuery(t *testing.T) {
+	const prefix = `search "ocid1.tenancy.oc1..aaa/_Audit" | where data.eventName != 'SummarizeMetricsData'`
+	cases := []struct {
+		name string
+		term string
+		want string
+	}{
+		{"无关键字", "", prefix + ` | sort by datetime desc`},
+		{"带关键字追加全文匹配", "TerminateInstance", prefix + ` and logContent = '*TerminateInstance*' | sort by datetime desc`},
+		{"引号与反斜杠被消毒", `O'Brien\"x`, prefix + ` and logContent = '*OBrienx*' | sort by datetime desc`},
+		{"纯引号消毒后为空不追加", `'"`, prefix + ` | sort by datetime desc`},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			if got := auditSearchQuery("ocid1.tenancy.oc1..aaa", tc.term); got != tc.want {
+				t.Fatalf("auditSearchQuery() = %q, want %q", got, tc.want)
+			}
+		})
+	}
+}
+
+func TestSanitizeAuditTerm(t *testing.T) {
+	if got := SanitizeAuditTerm("  Get*Instance\t "); got != "Get*Instance" {
+		t.Fatalf("应保留 * 并去除首尾空白与控制字符, got %q", got)
+	}
+	long := strings.Repeat("a", 300)
+	if got := SanitizeAuditTerm(long); len(got) != auditTermMaxLen {
+		t.Fatalf("超长应截断到 %d, got %d", auditTermMaxLen, len(got))
+	}
+}
+
 // auditEventEqual 比较两个 DTO：EventTime 按值比较,Raw 不参与,其余反射比较。
 func auditEventEqual(a, b AuditEvent) bool {
 	if (a.EventTime == nil) != (b.EventTime == nil) {
@@ -149,6 +407,7 @@ func TestAuditCursorAdvance(t *testing.T) {
 		Start:       now.Add(-24 * time.Hour),
 		End:         now,
 		WindowHours: 24,
+		Q:           "kw",
 	}
 	cases := []struct {
 		name      string
@@ -159,8 +418,10 @@ func TestAuditCursorAdvance(t *testing.T) {
 	}{
 		{"有事件重置 24h 窗", AuditCursor{Start: base.Start, End: base.End, WindowHours: 96}, false, 24, false},
 		{"空窗倍增", base, true, 48, false},
-		{"倍增封顶 720h", AuditCursor{Start: base.Start, End: base.End, WindowHours: 512}, true, 720, false},
+		{"倍增封顶 336h(14 天查询窗硬限)", AuditCursor{Start: base.Start, End: base.End, WindowHours: 256}, true, 336, false},
 		{"窗宽缺省按 24h 起算", AuditCursor{Start: base.Start, End: base.End}, true, 48, false},
+		{"回退模式有事件重置 1h 基准窗", AuditCursor{Start: base.Start, End: base.End, WindowHours: 8, M: auditModeFallback}, false, 1, false},
+		{"回退模式空窗照常倍增", AuditCursor{Start: base.Start, End: base.End, WindowHours: 1, M: auditModeFallback}, true, 2, false},
 		{"越过保留期即尽头", AuditCursor{Start: now.AddDate(0, 0, -366), End: now.AddDate(0, 0, -365), WindowHours: 24}, false, 0, true},
 	}
 	for _, tc := range cases {
@@ -184,6 +445,12 @@ func TestAuditCursorAdvance(t *testing.T) {
 			if next.Page != "" {
 				t.Fatalf("新窗应清空窗内游标, got %q", next.Page)
 			}
+			if next.Q != tc.cur.Q {
+				t.Fatalf("新窗应继承检索关键字, got %q want %q", next.Q, tc.cur.Q)
+			}
+			if next.M != tc.cur.M {
+				t.Fatalf("新窗应继承通道模式, got %q want %q", next.M, tc.cur.M)
+			}
 		})
 	}
 }

internal/service/audit.go

@@ -30,19 +30,23 @@ var ErrInvalidAuditCursor = errors.New("audit events: invalid cursor, refresh to
 var ErrAuditEventGone = errors.New("原始事件已不可取回,请刷新列表后重试")
 
 // AuditQuery 是批式懒加载查询参数:Cursor 为空表示自当前时刻首查,
-// 非空则从上次响应的游标位置继续向更早回溯;Limit 为单批目标条数。
+// 非空则从上次响应的游标位置继续向更早回溯;Limit 为单批目标条数;
+// Q 为检索关键字,仅首查生效(续查沿用游标内嵌的关键字,保证跨批一致)。
 type AuditQuery struct {
 	Region string
 	Cursor string
 	Limit  int
+	Q      string
 }
 
 // AuditEventsView 是批式查询响应:列表不含 raw(详情接口取回);
-// Cursor 供下一批续查原样带回,空且 Exhausted 表示已到 365 天保留期尽头。
+// Cursor 供下一批续查原样带回,空且 Exhausted 表示已到 365 天保留期尽头;
+// ScannedThrough 为已完整回溯到的时刻(比它更新的时段已扫完),供前端展示进度。
 type AuditEventsView struct {
-	Items     []oci.AuditEvent `json:"items"`
+	Items          []oci.AuditEvent `json:"items"`
-	Cursor    string           `json:"cursor,omitempty"`
+	Cursor         string           `json:"cursor,omitempty"`
-	Exhausted bool             `json:"exhausted"`
+	Exhausted      bool             `json:"exhausted"`
+	ScannedThrough *time.Time       `json:"scannedThrough,omitempty"`
 }
 
 // AuditEvents 实时查询租户 OCI 审计事件,纯透传不入库;region 为空时用配置
@@ -52,6 +56,9 @@ func (s *OciConfigService) AuditEvents(ctx context.Context, id uint, q AuditQuer
 	if err != nil {
 		return AuditEventsView{}, err
 	}
+	if q.Cursor == "" {
+		cur.Q = oci.SanitizeAuditTerm(q.Q)
+	}
 	cred, err := s.credentialsByID(ctx, id)
 	if err != nil {
 		return AuditEventsView{}, err
@@ -63,6 +70,7 @@ func (s *OciConfigService) AuditEvents(ctx context.Context, id uint, q AuditQuer
 	view := AuditEventsView{Items: s.stripAuditRaw(id, res.Items), Exhausted: res.Exhausted}
 	if res.Cursor != nil {
 		view.Cursor = encodeAuditCursor(*res.Cursor)
+		view.ScannedThrough = &res.Cursor.End
 	}
 	return view, nil
 }