v1.4.1 新增「重爬失败页」: 一键把失败页面重新加入待爬队列

- 后端 POST /api/tasks/<tid>/retry-failed: 从指定 run 提取 FAIL 页面,
  解除 visited 标记并注入待爬队列头部(去重, 已排队的不重复注入)
- 前端详情页 run 面板新增「🔄 重爬失败页 (N)」按钮(auto 模式且有失败页时显示),
  点击后自动注入并触发继续爬取

app.py

@@ -15,7 +15,7 @@ from flask import Flask, jsonify, request, send_file, send_from_directory
 import store
 import db
 import notify
-from engine import CrawlJob, probe_links
+from engine import CrawlJob, probe_links, normalize_url
 from scheduler import Scheduler, cron_next, interval_delta
 
 HERE = os.path.dirname(os.path.abspath(__file__))
@@ -435,6 +435,54 @@ def api_trash_clear():
 
 # ---------------- API: 运行控制 ----------------
 
+@app.route("/api/tasks/<tid>/retry-failed", methods=["POST"])
+def api_retry_failed(tid):
+    """重爬失败页: 提取指定 run (默认最新) 中失败的 URL, 从已爬集合解除标记并注入
+    待爬队列头部; 返回注入数量, 调用方可随后点「继续爬取」重爬这些页面"""
+    task = store.get_task(tid)
+    if not task:
+        return jsonify({"error": "任务不存在"}), 404
+    if task.get("mode") != "auto":
+        return jsonify({"error": "仅自动模式任务支持重爬失败页"}), 400
+    try:
+        body = request.get_json(force=True) or {}
+    except Exception:
+        body = {}
+    rid = request.args.get("run", "") or body.get("run", "")
+    runs = store.get_runs(tid)
+    cur = None
+    if rid:
+        cur = next((r for r in runs if r["id"] == rid), None)
+    else:
+        cur = runs[-1] if runs else None
+    if not cur:
+        return jsonify({"error": "运行记录不存在"}), 404
+    failed = [res.get("url") for res in cur.get("results", [])
+              if res.get("status") == "FAIL" and res.get("url")]
+    if not failed:
+        return jsonify({"error": "该运行记录没有失败页面", "injected": 0})
+    st = store.load_auto_state(tid, task)
+    visited = set(st.get("visited", []))
+    pending = st.get("pending", [])
+    pending_urls = {normalize_url(p.get("url", "")) for p in pending}
+    # 待重爬: 已爬过且不在待爬队列中的失败 URL (去重)
+    to_inject, seen = [], set()
+    for u in failed:
+        key = normalize_url(u)
+        if key in visited and key not in pending_urls and key not in seen:
+            seen.add(key)
+            to_inject.append({"url": u, "depth": 0, "source": "retry-failed"})
+    if not to_inject:
+        return jsonify({"error": "失败页面均已爬或已在待爬队列中", "injected": 0})
+    # 解除已爬标记
+    remove_keys = {normalize_url(u) for u in failed}
+    visited = {v for v in visited if normalize_url(v) not in remove_keys}
+    # 注入队列头部, 优先重爬
+    pending = to_inject + pending
+    store.save_auto_state(tid, {"pending": pending, "visited": sorted(visited)})
+    return jsonify({"injected": len(to_inject), "pending_total": len(pending)})
+
+
 @app.route("/api/tasks/<tid>/continue", methods=["POST"])
 def api_continue(tid):
     """继续爬取: auto 任务从待爬缓存队列接着爬 (跳过起始网址, 保留已爬集合)"""

static/app.js

@@ -618,6 +618,26 @@ function pageWindow(cur, pages, width) {
   return win;
 }
 
+/* 重爬失败页: 注入待爬队列并自动继续爬取 */
+async function retryFailed() {
+  const t = state.detail.task;
+  if (!t || !state.detail.runId) return;
+  if (!confirm("将把本次运行失败的页面重新加入待爬队列并立即继续爬取，确定？")) return;
+  try {
+    const d = await api(`/api/tasks/${t.id}/retry-failed`, {
+      method: "POST",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify({ run: state.detail.runId }),
+    });
+    toast(`已注入 ${d.injected} 个失败页，开始继续爬取…`);
+    if ((d.injected || 0) > 0) {
+      await api(`/api/tasks/${t.id}/continue`, { method: "POST" });
+    }
+    loadTasks();
+    openDetail(t.id);
+  } catch (e) { toast(e.message, true); }
+}
+
 function renderDetail() {
   const t = state.detail.task;
   const runs = t.runs || [];
@@ -752,6 +772,8 @@ function renderRunPanel(t, run) {
       <span class="ok">✅ ${s.ok}</span>
       <span class="fail">❌ ${s.fail}</span>
       <span class="img">🖼️ ${s.images}</span>
+      ${t.mode === "auto" && (s.fail || 0) > 0 && run.status !== "running" && run.status !== "paused" ? `
+        <button class="btn sm" title="将本次运行失败的页面重新加入待爬队列并继续爬取" onclick="retryFailed()">🔄 重爬失败页 (${s.fail})</button>` : ""}
     </div>
     ${prog}
     <div class="card-line">当前: <b>${esc(run.progress.current_url || "")}</b></div>