v1.7.4 auto 默认顺序改为优先 playwright、其次 agent-browser

- 按大爷要求调整: auto 优先 playwright(Python, domcontentloaded更宽容), 其次 agent-browser(Rust)
- capture_webpage + smart_capture 的 auto 选路同步调整
- 新增对称兜底: playwright 失败自动切 agent-browser 重试(原 agent-browser超时→playwright 逻辑保留)
- /api/backends 与前端选择器说明同步更新(auto label/priority)

app.py

@@ -708,6 +708,14 @@ async def capture_with_cdp(
                                 "html": html
                             })
             
+                        elif action == "text":
+                            text = await page.evaluate("document.body.innerText")
+                            result_data.append({
+                                "url": current_url,
+                                "title": title,
+                                "text": clean_text(text)
+                            })
+
             if result_data:
                 return {"success": True, "pages": result_data}
             else:
@@ -947,7 +955,7 @@ async def smart_capture_playwright(url, cfg, wait_time, viewport):
 def smart_capture(url, cfg, wait_time, viewport, backend="auto"):
     """按需截图总入口：滚动截图 + 视觉大模型实时判断，返回拼接长图"""
     if backend == "auto":
-        backend = "agent-browser" if AGENT_BROWSER_AVAILABLE else "playwright"
+        backend = "playwright" if PLAYWRIGHT_AVAILABLE else "agent-browser"
 
     if backend == "agent-browser":
         result = smart_capture_agent_browser(url, cfg, wait_time, viewport)
@@ -983,20 +991,21 @@ def capture_webpage(
     full_page: bool = False,
     viewport: dict = None,
     wait_time: int = 2000,
-    backend: str = "auto"
+    backend: str = "auto",
+    cdp_port: int = 9222
 ):
     """
     捕获网页
     
     Args:
-        backend: "auto", "agent-browser", "playwright"
+        backend: "auto", "agent-browser", "playwright", "chrome-cdp"
     """
     # 选择后端
     if backend == "auto":
-        if AGENT_BROWSER_AVAILABLE:
-            backend = "agent-browser"
-        elif PLAYWRIGHT_AVAILABLE:
+        if PLAYWRIGHT_AVAILABLE:
             backend = "playwright"
+        elif AGENT_BROWSER_AVAILABLE:
+            backend = "agent-browser"
         else:
             return {"success": False, "error": "No browser backend available. Install agent-browser or playwright."}
     
@@ -1040,9 +1049,46 @@ def capture_webpage(
             )
             loop.close()
             result["backend"] = "playwright"
-            return result
+        except Exception as e:
+            result = {"success": False, "error": str(e)}
+        # playwright 失败（auto 默认优先它）→ 自动切 agent-browser 兜底重试
+        if (not result.get("success") and AGENT_BROWSER_AVAILABLE):
+            try:
+                fb = capture_with_agent_browser(
+                    url, action, scroll_times, scroll_delay, full_page, viewport, wait_time
+                )
+                fb["backend"] = "agent-browser"
+                result = fb
+            except Exception:
+                pass
+        return result
+    
+    elif backend == "chrome-cdp":
+        # 连接已打开的 Chrome（需 --remote-debugging-port=<cdp_port>），归一化为单结果
+        if not PLAYWRIGHT_AVAILABLE:
+            return {"success": False, "error": "Playwright not installed (chrome-cdp 依赖 playwright)"}
+        try:
+            loop = asyncio.new_event_loop()
+            asyncio.set_event_loop(loop)
+            r = loop.run_until_complete(
+                capture_with_cdp(url_hint=url, action=action, cdp_port=cdp_port)
+            )
+            loop.close()
         except Exception as e:
             return {"success": False, "error": str(e)}
+        if not r.get("success"):
+            return r
+        if not r.get("pages"):
+            return {"success": False, "error": "chrome-cdp 未找到匹配页面（请确认 Chrome 已开 --remote-debugging-port）"}
+        p0 = r["pages"][0]
+        res = {"success": True, "title": p0.get("title", ""), "backend": "chrome-cdp"}
+        if action == "screenshot":
+            res["file_path"] = p0["file_path"]
+        elif action == "html":
+            res["html"] = p0["html"]
+        elif action == "text":
+            res["text"] = p0["text"]
+        return res
     
     else:
         return {"success": False, "error": f"Unknown backend: {backend}"}
@@ -1054,6 +1100,38 @@ def index():
     return render_template('index.html')
 
 
+@app.route('/api/backends')
+def api_backends():
+    """返回可用后端及默认选择顺序，供前端渲染选择器"""
+    available = []
+    if AGENT_BROWSER_AVAILABLE:
+        available.append("agent-browser")
+    if PLAYWRIGHT_AVAILABLE:
+        available.append("playwright")
+        # chrome-cdp 依赖 playwright 的 connect_over_cdp
+        available.append("chrome-cdp")
+    unavailable = []
+    if not AGENT_BROWSER_AVAILABLE:
+        unavailable.append("agent-browser")
+    if not PLAYWRIGHT_AVAILABLE:
+        unavailable.append("playwright")
+        unavailable.append("chrome-cdp")
+    return jsonify({
+        "success": True,
+        "default": "auto",
+        "available": available,
+        "unavailable": unavailable,
+        # auto 优先 playwright，其次 agent-browser，再 chrome-cdp
+        "priority": ["playwright", "agent-browser", "chrome-cdp"],
+        "labels": {
+            "auto": "自动（推荐：优先 Playwright，失败自动回退 agent-browser）",
+            "playwright": "Playwright（Python 版，domcontentloaded 更宽容，慢页面更稳，默认首选）",
+            "agent-browser": "agent-browser（Rust 版，反爬强、快，备选）",
+            "chrome-cdp": "Chrome CDP（连接已打开的 Chrome，需 --remote-debugging-port 启动）"
+        }
+    })
+
+
 @app.route('/api')
 def api_info():
     """API信息"""
@@ -1066,6 +1144,7 @@ def api_info():
         },
         "endpoints": {
             "/api/capture": "POST - Capture webpage (screenshot/html/text/smart) + 自动入库历史(记录调用者/方式/原始HTML)",
+            "/api/backends": "GET - 可用后端列表与默认顺序(供前端渲染后端选择器)",
             "/api/history": "GET - 历史记录分页列表 (?page&page_size&action&search)",
             "/api/history/<id>": "GET - 历史记录详情 / DELETE - 删除记录",
             "/api/history/<id>/file": "GET - 读取历史截图文件",
@@ -1320,7 +1399,8 @@ def capture():
         full_page=full_page,
         viewport=viewport,
         wait_time=wait_time,
-        backend=backend
+        backend=backend,
+        cdp_port=cdp_port
     )
     
     backend_used = result.get("backend", backend)

templates/index.html

@@ -624,6 +624,16 @@
                     </div>
                 </div>
                 
+                <div class="form-group">
+                    <label>捕获后端</label>
+                    <select id="backend" style="max-width:100%;">
+                        <option value="auto">加载中…</option>
+                    </select>
+                    <small id="backendHint" style="color: #666; display: block; margin-top: 4px;">
+                        自动 = 优先 Playwright，失败自动回退 agent-browser（推荐）
+                    </small>
+                </div>
+                
                 <div class="form-group">
                     <label>等待设置（重要！）</label>
                     <div class="row">
@@ -743,7 +753,7 @@
   "scroll_times": 3,          // 可选：加载动态内容
   "scroll_delay": 1000,       // 可选：滚动间隔
   "full_page": true,          // 可选：全页截图
-  "backend": "playwright",    // 可选：playwright / agent-browser
+  "backend": "auto",           // 可选：auto(默认,优先playwright,失败回退agent-browser) / playwright / agent-browser / chrome-cdp
   "caller": "news-tracker",     // 可选：调用者标识（历史记录里显示，默认游客）
   "call_method": "api",        // 可选：调用方式 web/api（缺省自动判定）
   "viewport": {"width":1280,"height":700},
@@ -844,12 +854,35 @@ DELETE /api/history/&lt;id&gt;        // 删除历史</code></pre>
         let smartConfig = null;
         let lastSmartHistoryId = null;
         
-        // 页面加载时读取历史 + 智能配置
+        // 页面加载时读取历史 + 智能配置 + 可用后端
         window.addEventListener('load', () => {
             loadHistory(1);
             loadSmartConfig();
+            loadBackends();
         });
         
+        async function loadBackends() {
+            const sel = document.getElementById('backend');
+            const hint = document.getElementById('backendHint');
+            try {
+                const res = await fetch('/api/backends');
+                const data = await res.json();
+                if (!data.success) throw new Error(data.error || '加载失败');
+                const labels = data.labels || {};
+                const opts = ['auto'].concat(data.available || []);
+                sel.innerHTML = opts.map(v =>
+                    `<option value="${v}">${escapeHtml(v)} — ${escapeHtml(labels[v] || '')}</option>`
+                ).join('') + (data.unavailable || []).map(v =>
+                    `<option value="${v}" disabled>${escapeHtml(v)} — ${escapeHtml(labels[v] || '')}（不可用）</option>`
+                ).join('');
+                sel.value = 'auto';
+                hint.textContent = labels['auto'] || hint.textContent;
+            } catch (err) {
+                sel.innerHTML = '<option value="auto">自动</option>';
+                hint.textContent = '后端列表加载失败：' + err.message;
+            }
+        }
+        
         // 操作类型切换：智能模式显示提示条
         document.querySelectorAll('input[name="action"]').forEach(r => {
             r.addEventListener('change', () => {
@@ -957,6 +990,7 @@ DELETE /api/history/&lt;id&gt;        // 删除历史</code></pre>
                 scroll_delay: scrollDelay,
                 full_page: fullPage,
                 wait_time: waitTime,
+                backend: document.getElementById('backend').value || 'auto',
                 viewport: {
                     width: viewportWidth,
                     height: viewportHeight