fix 分页bug,加入手动刷盘
This commit is contained in:
+84
-5
@@ -7,6 +7,8 @@ package harvester
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import (
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"encoding/json" // JSON 反序列化(解析爬虫请求)
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"fmt" // 错误格式化
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"io" // 读取请求体
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"log" // 日志输出
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"math/rand" // 随机数(打乱合并顺序、触发概率性操作)
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"net/http" // HTTP 服务端
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@@ -42,31 +44,108 @@ func New(db *storage.DB, infoSvc *info.Service) *Server {
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}
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}
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// ingestPayload 是爬虫发送的 JSON 请求体结构。
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// ingestPayload 是爬虫发送的 JSON 请求体结构(Go 爬虫用)。
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type ingestPayload struct {
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URL string `json:"url"` // 被索引页面的最终 URL
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URL string `json:"url"` // 被索引页面的最终 URL
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Keywords []struct {
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Word string `json:"word"` // 关键词
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Weight float32 `json:"weight"` // 该 URL 在该词下的权重
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} `json:"keywords"`
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}
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// ingestPayloadLegacy 是 Python 爬虫发送的旧格式:[url, [[word, weight], ...]]
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// 兼容处理:Python 端发的是数组,Go 期望的是对象。
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type ingestPayloadLegacy []any
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// Handler 返回 HTTP 路由处理器。
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func (s *Server) Handler() http.Handler {
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mux := http.NewServeMux()
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mux.HandleFunc("/l", s.handleIngest) // /l 端点:接收爬虫数据
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mux.HandleFunc("/flush", s.handleFlush) // /flush:强制刷盘(用于手动触发或调试)
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mux.HandleFunc("/admin/pending", s.handleAdminPending) // /admin/pending:返回未刷盘数据条数
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return mux
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}
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// handleAdminPending 返回内存中未刷盘的索引条目数量。
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func (s *Server) handleAdminPending(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Access-Control-Allow-Origin", "*")
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w.Header().Set("Content-Type", "application/json; charset=utf-8")
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count := atomic.LoadInt64(&s.rowCount)
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json.NewEncoder(w).Encode(map[string]int64{"pending": count})
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}
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// handleFlush 处理 GET /flush 请求,强制将内存索引刷到磁盘。
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func (s *Server) handleFlush(w http.ResponseWriter, r *http.Request) {
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s.flush()
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w.Write([]byte("flushed"))
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}
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// Flush 公开的刷盘方法,供外部调用(定时刷盘、退出前刷盘)。
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func (s *Server) Flush() { s.flush() }
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// parsePayload 解析爬虫请求体,兼容新旧两种格式。
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// 新格式(Go 爬虫):{"url": "...", "keywords": [{"word": "...", "weight": 0.0}]}
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// 旧格式(Python 爬虫):["url", [["word", weight], ...]]
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func parsePayload(r *http.Request) (*ingestPayload, error) {
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// 读取 body 为 bytes(支持重读)
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body, err := io.ReadAll(io.LimitReader(r.Body, 1<<20))
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if err != nil {
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return nil, err
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}
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// 先尝试新格式(Go 爬虫)
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var modern ingestPayload
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if err := json.Unmarshal(body, &modern); err == nil && modern.URL != "" {
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return &modern, nil
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}
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// 尝试旧格式(Python 爬虫):[url, [[word, weight], ...]]
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var legacy ingestPayloadLegacy
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if err := json.Unmarshal(body, &legacy); err != nil {
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return nil, fmt.Errorf("invalid payload: %w", err)
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}
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if len(legacy) < 2 {
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return nil, fmt.Errorf("invalid legacy payload: too few elements")
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}
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url, ok := legacy[0].(string)
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if !ok {
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return nil, fmt.Errorf("invalid url type")
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}
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kwsRaw, ok := legacy[1].([]any)
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if !ok {
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return nil, fmt.Errorf("invalid keywords type")
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}
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payload := &ingestPayload{URL: url}
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for _, kw := range kwsRaw {
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kwSlice, ok := kw.([]any)
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if !ok || len(kwSlice) < 2 {
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continue
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}
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word, _ := kwSlice[0].(string)
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weight, _ := kwSlice[1].(float64)
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if word == "" {
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continue
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}
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payload.Keywords = append(payload.Keywords, struct {
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Word string `json:"word"`
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Weight float32 `json:"weight"`
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}{word, float32(weight)})
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}
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if payload.URL == "" {
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return nil, fmt.Errorf("empty url after parsing")
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}
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return payload, nil
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}
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// handleIngest 处理爬虫发来的 POST 请求,将关键词数据写入内存索引。
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func (s *Server) handleIngest(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodPost {
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http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
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return
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}
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var payload ingestPayload
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if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
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http.Error(w, "bad json: "+err.Error(), http.StatusBadRequest)
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payload, err := parsePayload(r)
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if err != nil {
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http.Error(w, "bad payload: "+err.Error(), http.StatusBadRequest)
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return
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}
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@@ -16,6 +16,7 @@ import (
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"os" // 操作系统信号
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"os/signal" // 信号捕获
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"syscall" // 系统调用(SIGTERM)
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"time" // 定期刷盘定时器
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"sese-engine/analyzer" // 文本分析和关键词提取
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"sese-engine/backlink" // 反向链接(繁荣值)计算
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@@ -67,8 +68,17 @@ func main() {
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}
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}()
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// ---- 4b. 定期刷盘:每 60 秒强制将内存索引写入磁盘,确保搜索实时可用 ----
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go func() {
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ticker := time.NewTicker(60 * time.Second)
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defer ticker.Stop()
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for range ticker.C {
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harvSrv.Flush()
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}
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}()
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// ---- 5. 搜索服务器(默认 :80):对外提供搜索 API ----
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searchSrv := search.New(db, infoSvc, anal)
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searchSrv := search.New(db, infoSvc, anal, "http://localhost:5000")
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go func() {
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addr := fmt.Sprintf(":%d", config.SearchServerPort)
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if err := searchSrv.ListenAndServe(addr); err != nil {
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@@ -93,5 +103,6 @@ func main() {
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quit := make(chan os.Signal, 1)
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signal.Notify(quit, os.Interrupt, syscall.SIGTERM)
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<-quit
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log.Println("shutdown signal received, exiting...")
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log.Println("shutdown signal received, flushing index...")
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harvSrv.Flush() // 退出前刷盘,不丢数据
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}
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+78
-14
@@ -5,6 +5,7 @@ package search
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import (
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"container/heap" // 堆结构(域名交错排序)
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"encoding/json" // JSON 序列化(响应输出)
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"io" // 代理响应复制
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"log" // 日志
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"math" // 数学运算(Log、幂)
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"net/http" // HTTP 服务端
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@@ -25,18 +26,21 @@ import (
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// Server 是搜索 HTTP 服务器。
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type Server struct {
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db *storage.DB
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infoSvc *info.Service
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analyzer *analyzer.Analyzer
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httpCli *http.Client // 在线摘要抓取(无 robots.txt 检查)
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db *storage.DB
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infoSvc *info.Service
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analyzer *analyzer.Analyzer
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httpCli *http.Client // 在线摘要抓取(无 robots.txt 检查)
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harvesterURL string // 收获服务器地址(如 "http://localhost:5000")
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}
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// New 创建一个 search Server。
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func New(db *storage.DB, infoSvc *info.Service, a *analyzer.Analyzer) *Server {
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// harvesterURL 为收获服务器的地址,用于代理刷盘和状态查询。
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func New(db *storage.DB, infoSvc *info.Service, a *analyzer.Analyzer, harvesterURL string) *Server {
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return &Server{
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db: db,
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infoSvc: infoSvc,
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analyzer: a,
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db: db,
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infoSvc: infoSvc,
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analyzer: a,
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harvesterURL: harvesterURL,
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httpCli: &http.Client{
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Timeout: time.Duration(config.OnlineSnippetTimeout) * time.Second,
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},
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@@ -50,6 +54,7 @@ func (s *Server) Handler() http.Handler {
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mux.HandleFunc("/admin/recent", s.handleAdminRecent)
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mux.HandleFunc("/admin/stats", s.handleAdminStats)
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mux.HandleFunc("/admin/priority", s.handleAdminPriority)
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mux.HandleFunc("/admin/flush", s.handleAdminFlush)
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return mux
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}
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@@ -199,6 +204,19 @@ func (s *Server) handleAdminStats(w http.ResponseWriter, r *http.Request) {
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"domains": domainsMap,
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"languages": langsMap,
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}
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// 从 harvester 代理获取未刷盘数据条数
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if s.harvesterURL != "" {
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req, _ := http.NewRequest(http.MethodGet, s.harvesterURL+"/admin/pending", nil)
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if proxyResp, err := s.httpCli.Do(req); err == nil {
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defer proxyResp.Body.Close()
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var pendingResp map[string]int64
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if err := json.NewDecoder(proxyResp.Body).Decode(&pendingResp); err == nil {
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resp["pending"] = pendingResp["pending"]
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}
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}
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}
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json.NewEncoder(w).Encode(resp)
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}
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@@ -282,6 +300,33 @@ func (s *Server) handleAdminPriority(w http.ResponseWriter, r *http.Request) {
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}
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}
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// handleAdminFlush 代理到 harvester 的 /flush 接口,执行刷盘。
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func (s *Server) handleAdminFlush(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Access-Control-Allow-Origin", "*")
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w.Header().Set("Content-Type", "application/json; charset=utf-8")
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if r.Method != http.MethodGet && r.Method != http.MethodPost {
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http.Error(w, `{"error":"method not allowed"}`, 405)
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return
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}
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// 代理请求到 harvester
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proxyURL := s.harvesterURL + "/flush"
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req, err := http.NewRequest(http.MethodGet, proxyURL, nil)
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if err != nil {
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http.Error(w, `{"error":"`+err.Error()+`"}`, 500)
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return
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}
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resp, err := s.httpCli.Do(req)
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if err != nil {
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http.Error(w, `{"error":"harvester unreachable: `+err.Error()+`"}`, 502)
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return
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}
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defer resp.Body.Close()
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w.WriteHeader(resp.StatusCode)
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io.Copy(w, resp.Body)
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}
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// ---- 搜索处理器 ----
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// searchResponse 是搜索 API 的 JSON 响应结构。
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@@ -874,13 +919,28 @@ func rerank(candidates []candidate, from, to int) []candidate {
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heap.Push(h, rerankItem{top.scoreVec[0], top.url, domainMul[domain], top.scoreVec})
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}
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// 从堆中依次弹出得分最高的条目(受域名衰减影响),直到取够
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// 从堆中依次弹出得分最高的条目(受域名衰减影响),直到取够 to 条,
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// 然后截取 [from:to] 段返回。
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var result []candidate
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for h.Len() > 0 && len(result) < to {
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item := heap.Pop(h).(rerankItem)
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if len(result) >= from {
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result = append(result, candidate{url: item.url, scoreVec: item.vec})
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for len(result) < to {
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if h.Len() == 0 {
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// 堆为空时,将所有域名剩余条目依次推入堆(每域一条)
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anyPushed := false
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for domain, items := range domainItems {
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if len(items) == 0 {
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continue
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}
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next := items[len(items)-1]
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domainItems[domain] = items[:len(items)-1]
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heap.Push(h, rerankItem{next.scoreVec[0], next.url, domainMul[domain], next.scoreVec})
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anyPushed = true
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}
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if !anyPushed {
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break // 所有域名都没有剩余条目,结束
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}
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}
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item := heap.Pop(h).(rerankItem)
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result = append(result, candidate{url: item.url, scoreVec: item.vec})
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domain := netloc(item.url)
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domainMul[domain] /= 8 // 该域名的下一次出现衰减到 1/8
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remaining := domainItems[domain]
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@@ -890,7 +950,11 @@ func rerank(candidates []candidate, from, to int) []candidate {
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heap.Push(h, rerankItem{next.scoreVec[0], next.url, domainMul[domain], next.scoreVec})
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}
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}
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return result
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// 截取分页段
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if from >= len(result) {
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return nil
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}
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return result[from:]
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}
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// ---- 杂项辅助函数 ----
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