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4b545cbffae4fb105dfaab7dc44775951860aa6c
op-packages/mosdns/patches/219-feat-stats_api-add-data-persistence-support.patch
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From 7279f1514e11b8a5bf6717a0127d73ecf36014a3 Mon Sep 17 00:00:00 2001
From: sbwml <admin@cooluc.com>
Date: Sat, 29 Aug 2026 12:59:42 +0800
Subject: [PATCH 4/5] feat(stats_api): add data persistence support
Add dump_file and dump_interval configuration to support periodically
persisting and restoring metrics, top stats, and query logs across restarts.
Signed-off-by: sbwml <admin@cooluc.com>
---
plugin/executable/stats_api/stats_api.go | 314 +++++++++++++++++-
plugin/executable/stats_api/stats_api_test.go | 244 ++++++++++++++
2 files changed, 552 insertions(+), 6 deletions(-)
--- a/plugin/executable/stats_api/stats_api.go
+++ b/plugin/executable/stats_api/stats_api.go
@@ -24,8 +24,10 @@ import (
"encoding/json"
"errors"
"fmt"
+ "io"
"math"
"net/http"
+ "os"
"sort"
"strconv"
"strings"
@@ -35,13 +37,18 @@ import (
"github.com/IrineSistiana/mosdns/v5/coremain"
"github.com/IrineSistiana/mosdns/v5/pkg/query_context"
+ "github.com/IrineSistiana/mosdns/v5/pkg/utils"
"github.com/IrineSistiana/mosdns/v5/plugin/executable/sequence"
"github.com/go-chi/chi/v5"
+ "github.com/klauspost/compress/gzip"
"github.com/miekg/dns"
"go.uber.org/zap"
)
-const PluginType = "stats_api"
+const (
+ PluginType = "stats_api"
+ statsDumpHeader = "mosdns_stats_v1"
+)
func init() {
coremain.RegNewPluginFunc(PluginType, Init, func() any { return new(Args) })
@@ -51,14 +58,17 @@ func init() {
var _ sequence.RecursiveExecutable = (*StatsAPI)(nil)
type Args struct {
- Listen string `yaml:"listen"`
- Capacity int `yaml:"capacity"`
+ Listen string `yaml:"listen"`
+ Capacity int `yaml:"capacity"`
+ DumpFile string `yaml:"dump_file"`
+ DumpInterval int `yaml:"dump_interval"`
}
func (a *Args) init() {
if a.Capacity <= 0 {
a.Capacity = 2000
}
+ utils.SetDefaultUnsignNum(&a.DumpInterval, 600)
}
type AnswerDTO struct {
@@ -174,6 +184,42 @@ func (r *RingBuffer) QueryLogs(limit, of
return total, filtered[offset:end]
}
+// Export returns logs in chronological order (oldest first) and current seqID.
+func (r *RingBuffer) Export() ([]LogEntry, uint64) {
+ r.mu.RLock()
+ defer r.mu.RUnlock()
+
+ entries := make([]LogEntry, 0, r.count)
+ for i := 0; i < r.count; i++ {
+ idx := (r.head - r.count + i + r.capacity) % r.capacity
+ entries = append(entries, r.buf[idx])
+ }
+ return entries, r.seqID
+}
+
+// Import restores logs into ring buffer adapting to current capacity.
+func (r *RingBuffer) Import(entries []LogEntry, seqID uint64) {
+ r.mu.Lock()
+ defer r.mu.Unlock()
+
+ r.buf = make([]LogEntry, r.capacity)
+ r.head = 0
+ r.count = 0
+ r.seqID = seqID
+
+ start := 0
+ if len(entries) > r.capacity {
+ start = len(entries) - r.capacity
+ }
+ for i := start; i < len(entries); i++ {
+ r.buf[r.head] = entries[i]
+ r.head = (r.head + 1) % r.capacity
+ if r.count < r.capacity {
+ r.count++
+ }
+ }
+}
+
type TopItem struct {
Domain string `json:"domain,omitempty"`
ClientIP string `json:"client_ip,omitempty"`
@@ -220,6 +266,43 @@ func (t *TopStats) Clear() {
t.topBlocked = make(map[string]uint64)
}
+func (t *TopStats) Export() (map[string]uint64, map[string]uint64, map[string]uint64) {
+ t.mu.RLock()
+ defer t.mu.RUnlock()
+
+ domains := make(map[string]uint64, len(t.topDomains))
+ for k, v := range t.topDomains {
+ domains[k] = v
+ }
+ clients := make(map[string]uint64, len(t.topClients))
+ for k, v := range t.topClients {
+ clients[k] = v
+ }
+ blocked := make(map[string]uint64, len(t.topBlocked))
+ for k, v := range t.topBlocked {
+ blocked[k] = v
+ }
+ return domains, clients, blocked
+}
+
+func (t *TopStats) Import(domains, clients, blocked map[string]uint64) {
+ t.mu.Lock()
+ defer t.mu.Unlock()
+
+ t.topDomains = make(map[string]uint64, len(domains))
+ for k, v := range domains {
+ t.topDomains[k] = v
+ }
+ t.topClients = make(map[string]uint64, len(clients))
+ for k, v := range clients {
+ t.topClients[k] = v
+ }
+ t.topBlocked = make(map[string]uint64, len(blocked))
+ for k, v := range blocked {
+ t.topBlocked[k] = v
+ }
+}
+
func getSortedTop(m map[string]uint64, isClient bool, limit int) []TopItem {
type pair struct {
key string
@@ -286,6 +369,12 @@ type HistoryBucket struct {
Cached atomic.Uint64
}
+type HistoryBucketData struct {
+ Total uint64 `json:"total"`
+ Blocked uint64 `json:"blocked"`
+ Cached uint64 `json:"cached"`
+}
+
type HistoryStats struct {
mu sync.RWMutex
points map[int64]*HistoryBucket
@@ -362,6 +451,55 @@ func (h *HistoryStats) GetHistory(numPoi
return res
}
+func (h *HistoryStats) Export() map[int64]HistoryBucketData {
+ h.mu.RLock()
+ defer h.mu.RUnlock()
+
+ res := make(map[int64]HistoryBucketData, len(h.points))
+ for k, v := range h.points {
+ if v != nil {
+ res[k] = HistoryBucketData{
+ Total: v.Total.Load(),
+ Blocked: v.Blocked.Load(),
+ Cached: v.Cached.Load(),
+ }
+ }
+ }
+ return res
+}
+
+func (h *HistoryStats) Import(points map[int64]HistoryBucketData) {
+ h.mu.Lock()
+ defer h.mu.Unlock()
+
+ h.points = make(map[int64]*HistoryBucket, len(points))
+ cutoff := time.Now().UTC().Add(-48 * time.Hour).Unix()
+ for k, v := range points {
+ if k >= cutoff {
+ bucket := &HistoryBucket{}
+ bucket.Total.Store(v.Total)
+ bucket.Blocked.Store(v.Blocked)
+ bucket.Cached.Store(v.Cached)
+ h.points[k] = bucket
+ }
+ }
+}
+
+type StatsDumpData struct {
+ Version int `json:"version"`
+ Timestamp int64 `json:"timestamp"`
+ TotalQueries uint64 `json:"total_queries"`
+ BlockedQueries uint64 `json:"blocked_queries"`
+ CachedQueries uint64 `json:"cached_queries"`
+ TotalLatencyUs uint64 `json:"total_latency_us"`
+ TopDomains map[string]uint64 `json:"top_domains,omitempty"`
+ TopClients map[string]uint64 `json:"top_clients,omitempty"`
+ TopBlocked map[string]uint64 `json:"top_blocked,omitempty"`
+ History map[int64]HistoryBucketData `json:"history,omitempty"`
+ Logs []LogEntry `json:"logs,omitempty"`
+ SeqID uint64 `json:"seq_id,omitempty"`
+}
+
type StatsAPI struct {
args *Args
logger *zap.Logger
@@ -375,8 +513,10 @@ type StatsAPI struct {
cachedQueries atomic.Uint64
totalLatencyUs atomic.Uint64
- httpServer *http.Server
- closeOnce sync.Once
+ updatedCount atomic.Uint64
+ closeNotify chan struct{}
+ httpServer *http.Server
+ closeOnce sync.Once
}
func Init(bp *coremain.BP, args any) (any, error) {
@@ -390,6 +530,8 @@ func QuickSetup(bq sequence.BQ, s string
fields := strings.Fields(s)
listen := ""
capacity := 2000
+ dumpFile := ""
+ dumpInterval := 600
if len(fields) > 0 {
listen = fields[0]
}
@@ -398,7 +540,20 @@ func QuickSetup(bq sequence.BQ, s string
capacity = c
}
}
- return NewStatsAPI(&Args{Listen: listen, Capacity: capacity}, bq.L()), nil
+ if len(fields) > 2 {
+ dumpFile = fields[2]
+ }
+ if len(fields) > 3 {
+ if d, err := strconv.Atoi(fields[3]); err == nil && d > 0 {
+ dumpInterval = d
+ }
+ }
+ return NewStatsAPI(&Args{
+ Listen: listen,
+ Capacity: capacity,
+ DumpFile: dumpFile,
+ DumpInterval: dumpInterval,
+ }, bq.L()), nil
}
func NewStatsAPI(args *Args, logger *zap.Logger) *StatsAPI {
@@ -412,8 +567,14 @@ func NewStatsAPI(args *Args, logger *zap
ringBuffer: NewRingBuffer(args.Capacity),
topStats: NewTopStats(),
historyStats: NewHistoryStats(),
+ closeNotify: make(chan struct{}),
}
+ if err := s.loadDump(); err != nil {
+ s.logger.Error("failed to load stats dump", zap.Error(err))
+ }
+ s.startDumpLoop()
+
if len(args.Listen) > 0 {
srv := &http.Server{
Addr: args.Listen,
@@ -450,6 +611,8 @@ func (s *StatsAPI) Router() *chi.Mux {
r.Get("/api/v1/logs", s.handleLogs)
r.Get("/api/v1/top", s.handleTop)
r.Get("/api/v1/history", s.handleHistory)
+ r.Get("/api/v1/dump", s.handleDump)
+ r.Post("/api/v1/load_dump", s.handleLoadDump)
r.Post("/api/v1/logs/clear", s.handleClearLogs)
r.Post("/api/v1/cache/clear", s.handleClearCache)
@@ -560,9 +723,27 @@ func (s *StatsAPI) handleHistory(w http.
})
}
+func (s *StatsAPI) handleDump(w http.ResponseWriter, req *http.Request) {
+ w.Header().Set("Content-Type", "application/octet-stream")
+ if err := s.writeDump(w); err != nil {
+ http.Error(w, err.Error(), http.StatusInternalServerError)
+ return
+ }
+}
+
+func (s *StatsAPI) handleLoadDump(w http.ResponseWriter, req *http.Request) {
+ if err := s.readDump(req.Body); err != nil {
+ http.Error(w, err.Error(), http.StatusBadRequest)
+ return
+ }
+ s.updatedCount.Add(1)
+ w.WriteHeader(http.StatusOK)
+}
+
func (s *StatsAPI) handleClearLogs(w http.ResponseWriter, req *http.Request) {
s.ringBuffer.Clear()
s.topStats.Clear()
+ s.updatedCount.Add(1)
w.Header().Set("Content-Type", "application/json")
_ = json.NewEncoder(w).Encode(map[string]any{
@@ -579,6 +760,122 @@ func (s *StatsAPI) handleClearCache(w ht
})
}
+func (s *StatsAPI) writeDump(w io.Writer) error {
+ gw, err := gzip.NewWriterLevel(w, gzip.BestSpeed)
+ if err != nil {
+ return err
+ }
+ gw.Name = statsDumpHeader
+
+ data := StatsDumpData{
+ Version: 1,
+ Timestamp: time.Now().Unix(),
+ TotalQueries: s.totalQueries.Load(),
+ BlockedQueries: s.blockedQueries.Load(),
+ CachedQueries: s.cachedQueries.Load(),
+ TotalLatencyUs: s.totalLatencyUs.Load(),
+ }
+
+ data.TopDomains, data.TopClients, data.TopBlocked = s.topStats.Export()
+ data.History = s.historyStats.Export()
+ data.Logs, data.SeqID = s.ringBuffer.Export()
+
+ if err := json.NewEncoder(gw).Encode(&data); err != nil {
+ _ = gw.Close()
+ return fmt.Errorf("failed to encode stats dump: %w", err)
+ }
+
+ return gw.Close()
+}
+
+func (s *StatsAPI) readDump(r io.Reader) error {
+ gr, err := gzip.NewReader(r)
+ if err != nil {
+ return fmt.Errorf("failed to create gzip reader: %w", err)
+ }
+ defer gr.Close()
+
+ if gr.Name != statsDumpHeader {
+ return fmt.Errorf("invalid stats dump header: got %s, want %s", gr.Name, statsDumpHeader)
+ }
+
+ var data StatsDumpData
+ if err := json.NewDecoder(gr).Decode(&data); err != nil {
+ return fmt.Errorf("failed to decode stats dump: %w", err)
+ }
+
+ s.totalQueries.Store(data.TotalQueries)
+ s.blockedQueries.Store(data.BlockedQueries)
+ s.cachedQueries.Store(data.CachedQueries)
+ s.totalLatencyUs.Store(data.TotalLatencyUs)
+
+ s.topStats.Import(data.TopDomains, data.TopClients, data.TopBlocked)
+ s.historyStats.Import(data.History)
+ s.ringBuffer.Import(data.Logs, data.SeqID)
+
+ return nil
+}
+
+func (s *StatsAPI) loadDump() error {
+ if len(s.args.DumpFile) == 0 {
+ return nil
+ }
+ f, err := os.Open(s.args.DumpFile)
+ if err != nil {
+ if errors.Is(err, os.ErrNotExist) {
+ s.logger.Info("stats dump file does not exist, starting with empty stats", zap.String("file", s.args.DumpFile))
+ return nil
+ }
+ return err
+ }
+ defer f.Close()
+
+ if err := s.readDump(f); err != nil {
+ return err
+ }
+ s.logger.Info("stats dump loaded successfully", zap.String("file", s.args.DumpFile))
+ return nil
+}
+
+func (s *StatsAPI) dumpStats() error {
+ if len(s.args.DumpFile) == 0 {
+ return nil
+ }
+ f, err := os.Create(s.args.DumpFile)
+ if err != nil {
+ return err
+ }
+ defer f.Close()
+
+ if err := s.writeDump(f); err != nil {
+ return fmt.Errorf("failed to write stats dump, %w", err)
+ }
+ s.logger.Info("stats dumped successfully", zap.String("file", s.args.DumpFile))
+ return nil
+}
+
+func (s *StatsAPI) startDumpLoop() {
+ if len(s.args.DumpFile) == 0 {
+ return
+ }
+ go func() {
+ ticker := time.NewTicker(time.Duration(s.args.DumpInterval) * time.Second)
+ defer ticker.Stop()
+ for {
+ select {
+ case <-ticker.C:
+ if s.updatedCount.Swap(0) > 0 {
+ if err := s.dumpStats(); err != nil {
+ s.logger.Error("failed to dump stats", zap.Error(err))
+ }
+ }
+ case <-s.closeNotify:
+ return
+ }
+ }
+ }()
+}
+
func (s *StatsAPI) Exec(ctx context.Context, qCtx *query_context.Context, next sequence.ChainWalker) error {
start := time.Now()
err := next.ExecNext(ctx, qCtx)
@@ -586,6 +883,7 @@ func (s *StatsAPI) Exec(ctx context.Cont
s.totalQueries.Add(1)
s.totalLatencyUs.Add(uint64(elapsed.Microseconds()))
+ s.updatedCount.Add(1)
var clientIP string
if clientAddr := qCtx.ServerMeta.ClientAddr; clientAddr.IsValid() {
@@ -725,6 +1023,10 @@ func (s *StatsAPI) Exec(ctx context.Cont
func (s *StatsAPI) Close() error {
s.closeOnce.Do(func() {
+ close(s.closeNotify)
+ if err := s.dumpStats(); err != nil {
+ s.logger.Error("failed to dump stats on close", zap.Error(err))
+ }
if s.httpServer != nil {
ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
defer cancel()
--- a/plugin/executable/stats_api/stats_api_test.go
+++ b/plugin/executable/stats_api/stats_api_test.go
@@ -20,16 +20,20 @@
package stats_api
import (
+ "bytes"
"context"
"encoding/json"
"fmt"
"net/http"
"net/http/httptest"
+ "os"
+ "path/filepath"
"testing"
"time"
"github.com/IrineSistiana/mosdns/v5/pkg/query_context"
"github.com/IrineSistiana/mosdns/v5/plugin/executable/sequence"
+ "github.com/klauspost/compress/gzip"
"github.com/miekg/dns"
"go.uber.org/zap"
)
@@ -88,6 +92,65 @@ func TestRingBuffer(t *testing.T) {
}
}
+func TestRingBufferExportImport(t *testing.T) {
+ rb1 := NewRingBuffer(5)
+ for i := 1; i <= 8; i++ {
+ rb1.Push(LogEntry{
+ Domain: fmt.Sprintf("domain%d.com.", i),
+ ClientIP: "10.0.0.1",
+ })
+ }
+
+ exported, seqID := rb1.Export()
+ if len(exported) != 5 {
+ t.Fatalf("expected 5 exported entries, got %d", len(exported))
+ }
+ if seqID != 8 {
+ t.Errorf("expected seqID 8, got %d", seqID)
+ }
+ if exported[0].Domain != "domain4.com." {
+ t.Errorf("expected oldest in exported to be domain4.com., got %s", exported[0].Domain)
+ }
+ if exported[4].Domain != "domain8.com." {
+ t.Errorf("expected newest in exported to be domain8.com., got %s", exported[4].Domain)
+ }
+
+ // Import into same capacity
+ rb2 := NewRingBuffer(5)
+ rb2.Import(exported, seqID)
+ total, logs2 := rb2.QueryLogs(10, 0, "", "all")
+ if total != 5 || len(logs2) != 5 {
+ t.Fatalf("expected 5 logs in rb2, got %d", total)
+ }
+ if logs2[0].Domain != "domain8.com." {
+ t.Errorf("expected newest log to be domain8.com., got %s", logs2[0].Domain)
+ }
+ if logs2[4].Domain != "domain4.com." {
+ t.Errorf("expected oldest log to be domain4.com., got %s", logs2[4].Domain)
+ }
+
+ // Test pushing another entry to rb2 to verify seqID continues
+ rb2.Push(LogEntry{Domain: "domain9.com."})
+ _, logsAfterPush := rb2.QueryLogs(1, 0, "", "all")
+ if logsAfterPush[0].Domain != "domain9.com." {
+ t.Errorf("expected newest log domain9.com., got %s", logsAfterPush[0].Domain)
+ }
+
+ // Import into smaller capacity (3)
+ rb3 := NewRingBuffer(3)
+ rb3.Import(exported, seqID)
+ total3, logs3 := rb3.QueryLogs(10, 0, "", "all")
+ if total3 != 3 || len(logs3) != 3 {
+ t.Fatalf("expected 3 logs in rb3, got %d", total3)
+ }
+ if logs3[0].Domain != "domain8.com." {
+ t.Errorf("expected newest log domain8.com., got %s", logs3[0].Domain)
+ }
+ if logs3[2].Domain != "domain6.com." {
+ t.Errorf("expected oldest log domain6.com., got %s", logs3[2].Domain)
+ }
+}
+
func TestTopStats(t *testing.T) {
top := NewTopStats()
@@ -113,6 +176,28 @@ func TestTopStats(t *testing.T) {
}
}
+func TestTopStatsExportImport(t *testing.T) {
+ top1 := NewTopStats()
+ top1.Record("a.com.", "192.168.1.1", false)
+ top1.Record("a.com.", "192.168.1.1", false)
+ top1.Record("b.com.", "192.168.1.2", true)
+
+ d, c, b := top1.Export()
+ top2 := NewTopStats()
+ top2.Import(d, c, b)
+
+ domains, clients, blocked := top2.GetTop(10)
+ if len(domains) != 1 || domains[0].Domain != "a.com." || domains[0].Count != 2 {
+ t.Errorf("top domains export/import mismatch: %+v", domains)
+ }
+ if len(clients) != 2 {
+ t.Errorf("top clients count mismatch: %+v", clients)
+ }
+ if len(blocked) != 1 || blocked[0].Domain != "b.com." {
+ t.Errorf("top blocked mismatch: %+v", blocked)
+ }
+}
+
func TestHistoryStats(t *testing.T) {
h := NewHistoryStats()
now := time.Now()
@@ -132,6 +217,26 @@ func TestHistoryStats(t *testing.T) {
}
}
+func TestHistoryStatsExportImport(t *testing.T) {
+ h1 := NewHistoryStats()
+ now := time.Now()
+ h1.Record(now, false, false)
+ h1.Record(now, true, true)
+
+ exported := h1.Export()
+ if len(exported) == 0 {
+ t.Fatalf("expected exported history points")
+ }
+
+ h2 := NewHistoryStats()
+ h2.Import(exported)
+ points := h2.GetHistory(24)
+ lastPoint := points[len(points)-1]
+ if lastPoint.Total != 2 || lastPoint.Blocked != 1 || lastPoint.Cached != 1 {
+ t.Errorf("history stats import mismatch: %+v", lastPoint)
+ }
+}
+
func TestStatsAPIHTTPEndpoints(t *testing.T) {
s := NewStatsAPI(&Args{Capacity: 100}, zap.NewNop())
router := s.Router()
@@ -185,6 +290,31 @@ func TestStatsAPIHTTPEndpoints(t *testin
t.Errorf("expected 24 history points, got %d", len(histPoints))
}
+ // Test GET /api/v1/dump
+ reqDump := httptest.NewRequest(http.MethodGet, "/api/v1/dump", nil)
+ wDump := httptest.NewRecorder()
+ router.ServeHTTP(wDump, reqDump)
+ if wDump.Code != http.StatusOK {
+ t.Fatalf("expected HTTP 200 for dump, got %d", wDump.Code)
+ }
+ dumpBytes := wDump.Body.Bytes()
+ if len(dumpBytes) == 0 {
+ t.Fatalf("expected non-empty dump body")
+ }
+
+ // Test POST /api/v1/load_dump
+ s2 := NewStatsAPI(&Args{Capacity: 100}, zap.NewNop())
+ router2 := s2.Router()
+ reqLoadDump := httptest.NewRequest(http.MethodPost, "/api/v1/load_dump", bytes.NewReader(dumpBytes))
+ wLoadDump := httptest.NewRecorder()
+ router2.ServeHTTP(wLoadDump, reqLoadDump)
+ if wLoadDump.Code != http.StatusOK {
+ t.Fatalf("expected HTTP 200 for load_dump, got %d", wLoadDump.Code)
+ }
+ if s2.totalQueries.Load() != 1 {
+ t.Errorf("expected s2 total queries to be 1 after load_dump, got %d", s2.totalQueries.Load())
+ }
+
// Test POST /api/v1/logs/clear
reqClearLogs := httptest.NewRequest(http.MethodPost, "/api/v1/logs/clear", nil)
wClearLogs := httptest.NewRecorder()
@@ -258,3 +388,117 @@ func TestStatsAPIExec(t *testing.T) {
t.Errorf("expected rule qname google.com., got %s", logs[0].Rule)
}
}
+
+func TestStatsAPIPersistence(t *testing.T) {
+ tempDir := t.TempDir()
+ dumpFilePath := filepath.Join(tempDir, "stats.dump")
+
+ // Phase 1: Start stats_api with dump_file configured
+ s1 := NewStatsAPI(&Args{
+ Capacity: 50,
+ DumpFile: dumpFilePath,
+ DumpInterval: 600,
+ }, zap.NewNop())
+
+ // Push test logs and stats
+ for i := 1; i <= 10; i++ {
+ s1.ringBuffer.Push(LogEntry{
+ Domain: fmt.Sprintf("test%d.com.", i),
+ ClientIP: "192.168.1.100",
+ IsBlocked: i%2 == 0,
+ IsCached: i%3 == 0,
+ ElapsedMS: float64(i * 5),
+ })
+ s1.totalQueries.Add(1)
+ if i%2 == 0 {
+ s1.blockedQueries.Add(1)
+ }
+ if i%3 == 0 {
+ s1.cachedQueries.Add(1)
+ }
+ s1.totalLatencyUs.Add(uint64(i * 5000))
+ s1.topStats.Record(fmt.Sprintf("test%d.com.", i), "192.168.1.100", i%2 == 0)
+ s1.historyStats.Record(time.Now(), i%2 == 0, i%3 == 0)
+ }
+
+ // Close s1 -> triggers dumpStats()
+ if err := s1.Close(); err != nil {
+ t.Fatalf("Close failed: %v", err)
+ }
+
+ // Verify file exists
+ fi, err := os.Stat(dumpFilePath)
+ if err != nil {
+ t.Fatalf("dump file was not created: %v", err)
+ }
+ if fi.Size() == 0 {
+ t.Fatalf("dump file is empty")
+ }
+
+ // Verify gzip header and compression
+ f, err := os.Open(dumpFilePath)
+ if err != nil {
+ t.Fatalf("failed to open dump file: %v", err)
+ }
+ gr, err := gzip.NewReader(f)
+ if err != nil {
+ t.Fatalf("failed to create gzip reader on dump file: %v", err)
+ }
+ if gr.Name != statsDumpHeader {
+ t.Errorf("expected gzip header %s, got %s", statsDumpHeader, gr.Name)
+ }
+ _ = gr.Close()
+ _ = f.Close()
+
+ // Phase 2: Start new instance s2 with same dump_file -> loads dump automatically
+ s2 := NewStatsAPI(&Args{
+ Capacity: 50,
+ DumpFile: dumpFilePath,
+ DumpInterval: 600,
+ }, zap.NewNop())
+ defer s2.Close()
+
+ if s2.totalQueries.Load() != 10 {
+ t.Errorf("expected 10 total queries after load, got %d", s2.totalQueries.Load())
+ }
+ if s2.blockedQueries.Load() != 5 {
+ t.Errorf("expected 5 blocked queries after load, got %d", s2.blockedQueries.Load())
+ }
+ if s2.cachedQueries.Load() != 3 {
+ t.Errorf("expected 3 cached queries after load, got %d", s2.cachedQueries.Load())
+ }
+
+ totalLogs, logs := s2.ringBuffer.QueryLogs(10, 0, "", "all")
+ if totalLogs != 10 || len(logs) != 10 {
+ t.Fatalf("expected 10 logs in s2, got total=%d len=%d", totalLogs, len(logs))
+ }
+ if logs[0].Domain != "test10.com." {
+ t.Errorf("expected newest log test10.com., got %s", logs[0].Domain)
+ }
+
+ topDomains, topClients, topBlocked := s2.topStats.GetTop(10)
+ if len(topDomains) == 0 {
+ t.Errorf("expected top domains to be restored")
+ }
+ if len(topClients) == 0 || topClients[0].ClientIP != "192.168.1.100" {
+ t.Errorf("expected top clients to be restored")
+ }
+ if len(topBlocked) == 0 {
+ t.Errorf("expected top blocked to be restored")
+ }
+}
+
+func TestStatsAPINonExistentDumpFile(t *testing.T) {
+ tempDir := t.TempDir()
+ dumpFilePath := filepath.Join(tempDir, "non_existent_stats.dump")
+
+ // Should not error or panic
+ s := NewStatsAPI(&Args{
+ DumpFile: dumpFilePath,
+ }, zap.NewNop())
+ defer s.Close()
+
+ if s.totalQueries.Load() != 0 {
+ t.Errorf("expected 0 total queries, got %d", s.totalQueries.Load())
+ }
+}
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