ts

app/web.py

@@ -189,11 +189,36 @@ def write_users_txt(users: List[str]) -> None:
     os.replace(tmp, path)
 
 
-def require_browser() -> Browser:
-    if app_state.browser is None:
-        raise HTTPException(status_code=500, detail="Browser not ready")
+async def ensure_browser() -> Browser:
+    """按需启动浏览器（懒启动），避免服务启动阶段因为未安装 Chromium 而直接崩溃。"""
+    if app_state.browser is not None:
         return app_state.browser
 
+    # 初始化 playwright
+    if app_state.playwright is None:
+        app_state.playwright = await async_playwright().start()
+
+    try:
+        # 这里不强制指定 channel，交给 Playwright 选择已安装的 Chromium
+        app_state.browser = await app_state.playwright.chromium.launch(
+            headless=True,
+            args=[
+                "--no-sandbox",
+                "--disable-dev-shm-usage",
+            ],
+        )
+        log_manager.append("INFO", "Browser launched (lazy init)")
+        return app_state.browser
+    except Exception as e:
+        # 给出明确的修复提示
+        msg = (
+            f"Browser not ready: {e}. "
+            "请先在运行环境执行：`playwright install chromium`。"
+        )
+        log_manager.append("ERROR", msg)
+        raise HTTPException(status_code=500, detail=msg)
+
+
 
 # =========================
 # Status / Logs
@@ -279,7 +304,7 @@ async def import_users_from_txt():
 
     total_lines = len(raw_lines)
 
-    browser = require_browser()
+    browser = await ensure_browser()
 
     imported_ids: List[str] = []
     duplicates = 0
@@ -379,7 +404,7 @@ async def open_login():
     说明：前端 window.open 打开的页面不会影响服务端 Playwright 的登录态。
     正确使用方式：在部署环境（Docker + VNC）里打开 VNC 浏览器扫码登录。
     """
-    browser = require_browser()
+    browser = await ensure_browser()
     await auth_manager.open_login_page(browser)
     return {
         "login_url": config.LOGIN_URL,
@@ -389,7 +414,7 @@ async def open_login():
 
 @app.post("/api/login/verify")
 async def verify_login():
-    browser = require_browser()
+    browser = await ensure_browser()
     ok, msg = await auth_manager.verify_login(browser)
     meta = auth_manager.load_auth_meta()
     return {
@@ -421,7 +446,7 @@ async def start_scraping(request: StartRequest, background_tasks: BackgroundTask
         raise HTTPException(status_code=400, detail="用户列表为空，请先导入 users.txt")
 
     # 启动前校验登录态（单账号）
-    browser = require_browser()
+    browser = await ensure_browser()
     ok, msg = await auth_manager.verify_login(browser)
     if not ok:
         raise HTTPException(status_code=400, detail=f"未登录或登录失效：{msg}")