增加爬取状态api

search/server.go

@@ -66,6 +66,7 @@ type Server struct {
 	// crawler 爬虫实例（用于 Priority URL 添加时立即触发爬取）
 	crawler interface {
 		TriggerPriorityCrawl(url string)
+		GetCrawlStatus() crawler.CrawlStatus
 	}
 }
 
@@ -95,9 +96,10 @@ func (s *Server) SetBacklinkRunner(r interface {
 	s.backlinkRunner = r
 }
 
-// SetCrawler 注入爬虫实例（用于 Priority URL 添加时立即触发爬取）。
+// SetCrawler 注入爬虫实例（用于 Priority URL 添加时立即触发爬取和状态查询）。
 func (s *Server) SetCrawler(c interface {
 	TriggerPriorityCrawl(url string)
+	GetCrawlStatus() crawler.CrawlStatus
 }) {
 	s.crawler = c
 }
@@ -132,6 +134,7 @@ func (s *Server) Handler() http.Handler {
 	mux.HandleFunc("/admin/pending", s.handleAdminPending)
 	mux.HandleFunc("/admin/workers", s.handleAdminWorkers)
 	mux.HandleFunc("/admin/backlink", s.handleAdminBacklink)
+	mux.HandleFunc("/admin/crawl/status", s.handleAdminCrawlStatus)
 	// 静态文件（SPA fallback）
 	mux.Handle("/", spaHandler{dist: "dist"})
 	return mux
@@ -705,6 +708,36 @@ func (s *Server) handleAdminBacklink(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
+// handleAdminCrawlStatus 返回爬虫爬取状态。
+// GET: 返回当前轮次、总轮数、队列长度、已完成数、已收录总数、是否运行中
+func (s *Server) handleAdminCrawlStatus(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Access-Control-Allow-Origin", "*")
+	w.Header().Set("Content-Type", "application/json; charset=utf-8")
+
+	if r.Method != http.MethodGet && r.Method != http.MethodOptions {
+		http.Error(w, `{"error":"method not allowed"}`, 405)
+		return
+	}
+	if r.Method == http.MethodOptions {
+		w.WriteHeader(204)
+		return
+	}
+
+	if s.crawler == nil {
+		json.NewEncoder(w).Encode(crawler.CrawlStatus{
+			CurrentEpoch:   0,
+			MaxEpoch:       0,
+			QueueLength:    0,
+			CompletedCount: 0,
+			VisitedTotal:   0,
+			IsRunning:      false,
+		})
+		return
+	}
+
+	json.NewEncoder(w).Encode(s.crawler.GetCrawlStatus())
+}
+
 // ---- 搜索处理器 ----
 
 // searchResponse 是搜索 API 的 JSON 响应结构。