fix: 扫码登录状态可独立查询 + 趋势图改回自适应纵轴
【登录反馈】实测这台浏览器 loggedIn=true，其实早就登录成功了；看不到反馈是判据和设计的问题： 1. 判据不可靠。原先靠 web_session 的值变化判断——对照组显示：一个全新的空 profile 首次访问小红书就会被发一个 web_session，所以「有这个 cookie」什么都证明不了。可信信号是页面自己的 __INITIAL_STATE__.user.loggedIn，但它是 Vue 响应式引用，必须 .value 解包（这就是前面探针读到 [object Object] 和 None 的原因）。 2. 状态绑死在临时会话上。扫码会话是内存状态，进程一重启就没（部署、崩溃都算），面板于是悄悄退回初始态——一次成功扫码看起来像什么都没发生。 改法不是让会话活得久，而是把「登没登录」变成随时可查、与会话无关： - 新增 GET /api/monitor/login/state，直接问浏览器要答案，带 5 秒缓存；force=true 先重载页面再读，用于状态陈旧 - qrlogin 改为常驻 Playwright 客户端 + 复用同一个标签页，并在重启后认领浏览器里已存在的 xhs 标签页，避免堆孤儿页 - 把「读不到状态」与「未登录」分开——前者显示具体错误，不再悄悄显示成未登录 - 面板顶部常驻显示登录态与昵称，带「重新检测」按钮；扫码成功后自动翻转 【趋势图】上一轮改过头了。dataviz 规范里没有「折线图必须从 0 起」这条——基线相关的条文全是讲柱状图的（柱状图用长度编码数值，不从 0 起比例就是错的；折线图用位置编码，轴只需如实框住数据）。改回自适应，保留上一轮修好的左侧刻度栏让范围始终可见；步长收敛到 1/2/5×10ⁿ，全平序列撑开一档避免除零。
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@@ -8,7 +8,7 @@
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#
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# 声明：本代码仅供学习和研究目的使用。使用者应遵守以下原则：
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# 1. 不得用于任何商业用途。
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# 2. 使用时应遵守目标平台的使用条款和robots.txt规则。
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# 2. 使用时应遵守对应平台的使用条款和robots.txt规则。
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# 3. 不得进行大规模爬取或对平台造成运营干扰。
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# 4. 应合理控制请求频率，避免给目标平台带来不必要的负担。
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# 5. 不得用于任何非法或不当的用途。
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@@ -16,32 +16,29 @@
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# 详细许可条款请参阅项目根目录下的LICENSE文件。
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# 使用本代码即表示您同意遵守上述原则和LICENSE中的所有条款。
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"""Show a login QR code to the operator through the WebUI.
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"""扫码登录，以及"现在到底登没登录"的查询。
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Why this module exists: on a server deployment Chrome runs under Xvfb, so there
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is no display to look at, and the helper the crawler normally uses to present the
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QR (`show_qrcode` in `tools/crawler_util.py`) calls PIL's ``Image.show()`` -- it
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needs a desktop image viewer that such a machine does not have, so the code would
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go nowhere and the operator would be stuck. Instead the QR is read straight out
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of the page over CDP and handed to the WebUI, which renders it as an ``<img>``.
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**为什么需要这个模块**：服务器上 Chrome 跑在 Xvfb 里没有显示器，爬虫原本用
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`show_qrcode`（PIL 的 `Image.show()`）弹窗展示二维码，那需要桌面看图程序，服务器上
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没有。所以改成经 CDP 把二维码从页面里读出来交给 WebUI。
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Three details that are easy to get wrong:
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**为什么登录状态要能独立查询**：扫码会话是内存里的临时状态，进程一重启就没了
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（部署、崩溃都算）。把"是否已登录"绑在它上面，就会出现"扫完了但界面没反应、
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也不知道到底成没成"。所以状态查询是独立的、随时可调用的，二维码只是达成它的手段之一。
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* **Reuse the browser's default context.** ``browser.new_context()`` would give
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an incognito-like profile, so the scan would land in a cookie jar the crawler
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never reads and every run would still look logged out. The real profile -- the
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one the crawler attaches to -- is ``browser.contexts[0]``.
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* **Never call ``browser.close()``.** On a CDP connection that tears down the
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operator's own Chrome and takes every unrelated tab with it. Only the page this
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module opened is closed, and the Playwright client is stopped to drop the
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socket.
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* **A scan is not a login until the cookie changes.** The page can be showing a
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QR for an account that is in fact already signed in, so success is decided by
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``web_session`` appearing or changing against the value captured at start,
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never by anything the page displays.
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三个容易搞错的地方：
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* **必须复用浏览器默认 context**。`browser.new_context()` 会造出一个无痕式的 profile，
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扫了也白扫——爬虫读不到那份 cookie。真正的 profile 在 `browser.contexts[0]`。
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* **绝不能调 `browser.close()`**。对 CDP 连接而言那会关掉操作者自己的 Chrome，
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连带所有无关标签页。只能关本模块自己开的那一个。
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* **不能靠 `web_session` 判断登录**。实测：一个全新的空 profile 首次访问小红书就会
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被发一个 `web_session`，所以"有这个 cookie"什么都证明不了。可信信号是页面自己的
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`__INITIAL_STATE__.user.loggedIn`。
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"""
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import asyncio
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import json
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import os
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import time
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from typing import Any, Dict, Optional
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@@ -52,10 +49,12 @@ from tools import utils
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from .platforms import PLATFORM_XHS
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# How long a QR stays valid before the session is written off. The platform
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# rotates the code well before this; the limit exists so an abandoned attempt
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# cannot pin a browser tab open indefinitely.
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QR_TTL_SECONDS = 180
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# 二维码有效期。平台自己会更早轮换；这个上限只是为了让一次被放弃的尝试不会
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# 永久占着一个标签页。
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QR_TTL_SECONDS = 300
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# 登录状态查询的缓存时长。轮询时不必每次都去问浏览器。
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STATE_CACHE_SECONDS = 5
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STATUS_IDLE = "idle"
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STATUS_WAITING = "waiting"
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@@ -63,35 +62,56 @@ STATUS_SUCCESS = "success"
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STATUS_EXPIRED = "expired"
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STATUS_ERROR = "error"
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# Only xhs is wired: it is the only platform whose monitor pipeline works, and
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# pretending otherwise would offer the operator a button that cannot succeed.
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# 只有小红书接了监控流程，所以扫码也只对它开放。给别的平台显示一个按不动的按钮
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# 是在假装功能存在。
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LOGIN_URL: Dict[str, str] = {PLATFORM_XHS: "https://www.xiaohongshu.com"}
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EXPLORE_URL: Dict[str, str] = {PLATFORM_XHS: "https://www.xiaohongshu.com/explore"}
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QR_SELECTOR: Dict[str, str] = {PLATFORM_XHS: "xpath=//img[@class='qrcode-img']"}
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LOGIN_BUTTON_SELECTOR: Dict[str, str] = {
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PLATFORM_XHS: "xpath=//*[@id='app']/div[1]/div[2]/div[1]/ul/div[1]/button"
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}
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SESSION_COOKIE: Dict[str, str] = {PLATFORM_XHS: "web_session"}
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_IDLE_SNAPSHOT: Dict[str, Any] = {
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"status": STATUS_IDLE,
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"platform": None,
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"image": "",
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"message": "",
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"elapsed": 0,
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"expires_in": 0,
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# 页面自己报告的登录态。
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#
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# `user.loggedIn` 是 Vue 的响应式引用，直接读会得到一个对象（这正是最初探针读到
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# "[object Object]" 的原因），必须取 `.value`。返回字符串而不是对象，因为
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# `__INITIAL_STATE__` 里有循环引用，`JSON.stringify` 整个结构会抛
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# "Converting circular structure to JSON"。
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LOGIN_STATE_PROBE = """
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() => {
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try {
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const user = (window.__INITIAL_STATE__ || {}).user;
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if (!user) return JSON.stringify({ known: false });
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let loggedIn = user.loggedIn;
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if (loggedIn && typeof loggedIn === 'object' && 'value' in loggedIn) loggedIn = loggedIn.value;
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let info = null;
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try { info = user.userInfo || null; } catch (e) { info = null; }
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const text = (v) => (v === null || v === undefined ? null : String(v));
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return JSON.stringify({
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known: true,
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loggedIn: Boolean(loggedIn),
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nickname: info ? text(info.nickname) : null
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});
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} catch (e) {
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return JSON.stringify({ known: false, error: String(e) });
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}
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}
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"""
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_lock = asyncio.Lock()
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_current: Optional["QrLoginSession"] = None
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# 常驻的 Playwright 客户端和本模块自己的标签页。长期持有是有意的：状态查询要能
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# 随时回答，而每次都新建一个标签页会在操作者的浏览器里堆垃圾。
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_playwright: Any = None
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_page: Any = None
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# (时间戳, 结果)，避免轮询时反复问浏览器。
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_state_cache: Optional[tuple[float, Dict[str, Any]]] = None
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def _cdp_url() -> str:
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"""Where to reach the browser's DevTools endpoint.
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``MC_CDP_URL`` wins so a deployment can point at another host without a code
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change; otherwise the port comes from the same config the crawler itself
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reads, so the two can never drift apart.
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"""
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"""浏览器 DevTools 端点。``MC_CDP_URL`` 优先，便于换主机而不用改代码。"""
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return os.getenv("MC_CDP_URL") or f"http://127.0.0.1:{config.CDP_DEBUG_PORT}"
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@@ -101,47 +121,163 @@ def _login_url(platform: str) -> str:
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return LOGIN_URL[platform]
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class QrLoginSession:
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"""One live QR-login attempt against the CDP browser."""
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async def _ensure_context() -> Any:
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"""连上浏览器并返回它的默认 context。"""
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global _playwright
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def __init__(self, platform: str, playwright: Any, page: Any, baseline: str) -> None:
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if _playwright is None:
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_playwright = await async_playwright().start()
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try:
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browser = await _playwright.chromium.connect_over_cdp(_cdp_url(), timeout=15000)
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except Exception as exc:
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await _reset_playwright()
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raise RuntimeError(
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f"连接浏览器失败（{_cdp_url()}）。请确认服务器上的 Chrome 以 "
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f"--remote-debugging-port 启动。原始错误：{exc}"
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) from exc
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if not browser.contexts:
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raise RuntimeError(
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"浏览器没有可用上下文。CDP 已连上，但读不到 profile —— "
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"请确认 Chrome 不是以无痕模式启动的。"
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)
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# contexts[0] 就是真实 profile，用它，不要 new_context()。
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return browser.contexts[0]
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async def _ensure_page(platform: str = PLATFORM_XHS, reload: bool = False) -> Any:
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"""本模块在操作者浏览器里的那一个标签页，复用而不是反复新建。
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若已有一个停在目标站点的标签页就认领它——进程重启后页柄会丢，但标签页还在，
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认领可以避免在浏览器里留下一堆没人关的孤儿页。
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"""
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global _page
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context = await _ensure_context()
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if _page is not None:
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try:
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if _page.is_closed():
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_page = None
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except Exception:
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_page = None
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if _page is None:
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for candidate in context.pages:
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try:
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if "xiaohongshu.com" in candidate.url or "rednote.com" in candidate.url:
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_page = candidate
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break
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except Exception:
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continue
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if _page is None:
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_page = await context.new_page()
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try:
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url = _page.url
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except Exception:
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url = ""
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if reload or "xiaohongshu.com" not in url and "rednote.com" not in url:
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await _page.goto(
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EXPLORE_URL.get(platform, EXPLORE_URL[PLATFORM_XHS]),
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wait_until="domcontentloaded",
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timeout=45000,
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)
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return _page
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async def check_login_state(force: bool = False) -> Dict[str, Any]:
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"""问浏览器：现在登录了吗？
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``force`` 会先重新加载页面。SPA 的状态会随登录实时更新，所以轮询时不必重载；
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但若登录态是在别处失效的，页面上的副本可能是陈旧的，重新检测就该重载。
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"""
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global _state_cache
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now = time.time()
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if not force and _state_cache is not None:
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cached_at, cached = _state_cache
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if now - cached_at < STATE_CACHE_SECONDS:
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return cached
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try:
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page = await _ensure_page(reload=force)
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raw = await page.evaluate(LOGIN_STATE_PROBE)
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parsed = json.loads(raw) if isinstance(raw, str) else {"known": False}
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except Exception as exc:
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result = {
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"known": False,
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"logged_in": False,
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"nickname": None,
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"error": f"{exc.__class__.__name__}: {exc}",
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}
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_state_cache = (now, result)
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return result
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result = {
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"known": bool(parsed.get("known")),
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"logged_in": bool(parsed.get("loggedIn")),
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"nickname": parsed.get("nickname"),
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}
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_state_cache = (now, result)
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return result
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async def _reset_playwright() -> None:
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global _playwright, _page
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_page = None
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if _playwright is not None:
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try:
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await _playwright.stop()
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except Exception:
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pass
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_playwright = None
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class QrLoginSession:
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"""一次进行中的扫码尝试。"""
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def __init__(self, platform: str, page: Any) -> None:
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self.platform = platform
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self.status = STATUS_WAITING
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self.message = "请用小红书 App 扫描二维码"
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self.message = "请用手机扫描二维码"
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self.image = ""
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self.started_at = time.time()
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self._playwright = playwright
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self.logged_in = False
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self.nickname: Optional[str] = None
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self._page = page
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# The `web_session` value present *before* the scan. An account already
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# signed in has a non-empty baseline, which is why success is "changed",
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# not merely "present".
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self._baseline = baseline
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@property
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def elapsed(self) -> float:
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return time.time() - self.started_at
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async def refresh(self) -> None:
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"""Poll the browser once for a completed scan."""
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"""轮询一次，看扫码是否完成。"""
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if self.status != STATUS_WAITING:
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return
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if self.elapsed > QR_TTL_SECONDS:
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self.status = STATUS_EXPIRED
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self.message = "二维码已超时，请重新获取"
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return
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try:
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cookies = await self._page.context.cookies()
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except Exception:
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# The operator may have closed the tab we opened.
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self.status = STATUS_ERROR
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self.message = "二维码所在页面已被关闭，请重新获取"
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return
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token = {c["name"]: c["value"] for c in cookies}.get(
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SESSION_COOKIE[self.platform], ""
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)
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if token and token != self._baseline:
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state = await check_login_state()
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if state.get("logged_in"):
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self.logged_in = True
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self.nickname = state.get("nickname")
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self.status = STATUS_SUCCESS
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self.message = "登录成功，登录态已写入浏览器 profile"
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who = f"（{self.nickname}）" if self.nickname else ""
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self.message = f"登录成功{who}，登录态已写入浏览器 profile"
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return
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try:
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if self._page.is_closed():
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self.status = STATUS_ERROR
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self.message = "二维码所在页面已被关闭，请重新获取"
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except Exception:
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pass
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def snapshot(self) -> Dict[str, Any]:
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return {
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@@ -151,27 +287,17 @@ class QrLoginSession:
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"message": self.message,
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"elapsed": int(self.elapsed),
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"expires_in": max(0, int(QR_TTL_SECONDS - self.elapsed)),
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"logged_in": self.logged_in,
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"nickname": self.nickname,
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}
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async def close(self) -> None:
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"""Drop our page and the Playwright client, leaving Chrome untouched."""
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try:
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await self._page.close()
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except Exception:
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pass
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try:
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await self._playwright.stop()
|
||||
except Exception:
|
||||
pass
|
||||
|
||||
|
||||
async def _read_qr(page: Any, platform: str) -> str:
|
||||
"""Pull the QR image out of the page, opening the login dialog if needed."""
|
||||
"""把二维码从页面里取出来，必要时先点开登录框。"""
|
||||
image = await utils.find_login_qrcode(page, selector=QR_SELECTOR[platform])
|
||||
if image:
|
||||
return image
|
||||
# The dialog does not always open on its own. This is the same fallback the
|
||||
# crawler's own QR flow performs before giving up.
|
||||
# 登录框不一定自己弹出来。这是爬虫自身扫码流程里同款兜底。
|
||||
await asyncio.sleep(0.5)
|
||||
try:
|
||||
await page.locator(LOGIN_BUTTON_SELECTOR[platform]).click(timeout=5000)
|
||||
@@ -180,68 +306,45 @@ async def _read_qr(page: Any, platform: str) -> str:
|
||||
return await utils.find_login_qrcode(page, selector=QR_SELECTOR[platform])
|
||||
|
||||
|
||||
async def _reset_locked() -> None:
|
||||
async def _discard_current_locked() -> None:
|
||||
global _current
|
||||
if _current is not None:
|
||||
await _current.close()
|
||||
_current = None
|
||||
_current = None
|
||||
|
||||
|
||||
async def start(platform: str = PLATFORM_XHS) -> Dict[str, Any]:
|
||||
"""Open a login page in the CDP browser and return its QR code."""
|
||||
"""在 CDP 浏览器里打开登录页，取回二维码。"""
|
||||
global _current
|
||||
|
||||
if platform not in LOGIN_URL:
|
||||
raise ValueError(f"平台 {platform} 尚未接入扫码登录（目前仅支持小红书）")
|
||||
|
||||
async with _lock:
|
||||
await _reset_locked()
|
||||
await _discard_current_locked()
|
||||
|
||||
playwright = await async_playwright().start()
|
||||
page = await _ensure_page(platform)
|
||||
try:
|
||||
browser = await playwright.chromium.connect_over_cdp(_cdp_url(), timeout=15000)
|
||||
except Exception as exc:
|
||||
await playwright.stop()
|
||||
raise RuntimeError(
|
||||
f"连接浏览器失败（{_cdp_url()}）。请确认服务器上的 Chrome 以 "
|
||||
f"--remote-debugging-port 启动。原始错误：{exc}"
|
||||
) from exc
|
||||
|
||||
if not browser.contexts:
|
||||
await playwright.stop()
|
||||
raise RuntimeError(
|
||||
"浏览器没有可用上下文。CDP 已连上，但读不到 profile —— "
|
||||
"请确认 Chrome 不是以无痕模式启动的。"
|
||||
await page.goto(
|
||||
_login_url(platform), wait_until="domcontentloaded", timeout=45000
|
||||
)
|
||||
|
||||
# contexts[0] is the real profile. See the module docstring.
|
||||
context = browser.contexts[0]
|
||||
page = await context.new_page()
|
||||
try:
|
||||
await page.goto(_login_url(platform), wait_until="domcontentloaded", timeout=30000)
|
||||
image = await _read_qr(page, platform)
|
||||
cookies = await context.cookies()
|
||||
except Exception as exc:
|
||||
try:
|
||||
await page.close()
|
||||
except Exception:
|
||||
pass
|
||||
await playwright.stop()
|
||||
raise RuntimeError(f"打开登录页失败：{exc}") from exc
|
||||
|
||||
baseline = {c["name"]: c["value"] for c in cookies}.get(
|
||||
SESSION_COOKIE[platform], ""
|
||||
)
|
||||
|
||||
session = QrLoginSession(platform, playwright, page, baseline)
|
||||
session = QrLoginSession(platform, page)
|
||||
session.image = image
|
||||
if not image:
|
||||
if baseline:
|
||||
session.status = STATUS_SUCCESS
|
||||
session.message = "浏览器已经是登录状态，无需扫码"
|
||||
else:
|
||||
session.status = STATUS_ERROR
|
||||
session.message = "页面上没找到二维码，请确认站点结构没有变化"
|
||||
|
||||
global _current
|
||||
state = await check_login_state()
|
||||
if state.get("logged_in"):
|
||||
# 已经是登录状态时站点不显示二维码——这本身就是成功，不是失败。
|
||||
session.status = STATUS_SUCCESS
|
||||
session.logged_in = True
|
||||
session.nickname = state.get("nickname")
|
||||
who = f"（{session.nickname}）" if session.nickname else ""
|
||||
session.message = f"浏览器已经是登录状态{who}，无需扫码"
|
||||
elif not image:
|
||||
session.status = STATUS_ERROR
|
||||
session.message = "页面上没找到二维码，请确认站点结构没有变化"
|
||||
|
||||
_current = session
|
||||
return session.snapshot()
|
||||
|
||||
@@ -249,20 +352,40 @@ async def start(platform: str = PLATFORM_XHS) -> Dict[str, Any]:
|
||||
async def status() -> Dict[str, Any]:
|
||||
async with _lock:
|
||||
if _current is None:
|
||||
return dict(_IDLE_SNAPSHOT)
|
||||
state = await check_login_state()
|
||||
return {
|
||||
"status": STATUS_IDLE,
|
||||
"platform": None,
|
||||
"image": "",
|
||||
"message": "",
|
||||
"elapsed": 0,
|
||||
"expires_in": 0,
|
||||
"logged_in": bool(state.get("logged_in")),
|
||||
"nickname": state.get("nickname"),
|
||||
}
|
||||
await _current.refresh()
|
||||
return _current.snapshot()
|
||||
|
||||
|
||||
async def cancel() -> Dict[str, Any]:
|
||||
async with _lock:
|
||||
await _reset_locked()
|
||||
snapshot = dict(_IDLE_SNAPSHOT)
|
||||
snapshot["message"] = "已取消"
|
||||
return snapshot
|
||||
await _discard_current_locked()
|
||||
state = await check_login_state()
|
||||
return {
|
||||
"status": STATUS_IDLE,
|
||||
"platform": None,
|
||||
"image": "",
|
||||
"message": "已取消",
|
||||
"elapsed": 0,
|
||||
"expires_in": 0,
|
||||
"logged_in": bool(state.get("logged_in")),
|
||||
"nickname": state.get("nickname"),
|
||||
}
|
||||
|
||||
|
||||
async def shutdown() -> None:
|
||||
"""Release the browser tab at application shutdown."""
|
||||
"""进程退出时断开连接。刻意不关那个标签页——它是操作者浏览器的一部分。"""
|
||||
global _current
|
||||
async with _lock:
|
||||
await _reset_locked()
|
||||
_current = None
|
||||
await _reset_playwright()
|
||||
|
||||
Reference in New Issue
Block a user