- Multi-tab: browser_new_page / browser_list_pages / browser_switch_page / browser_close_page in playwright_mcp.py; each new page gets a fresh Playwright context, so cookies and storage are isolated between pages. Single-page tools act on the current page; switching to a missing index is an error, not a crash; closing the last page is an error (use browser_close). - Navigation allowlist: BROWSER_ALLOWED_HOSTS (comma list, leading-dot suffix match, case/port-insensitive) checked in _check_allowed_url before launching Chromium; unset (or empty) means no check, the old behaviour. file:// always allowed; localhost/127.0.0.1 have no special treatment. - Close cleanup: browser_close closes all pages and best-effort removes cwd browser-live.png / browser-live.json; custom screenshot files are untouched. list_pages needs no launch. - Egress filter: 10 programming-source Tinyproxy BASIC rules (python.org, nodejs.org, go.dev, pkg.go.dev, rust-lang.org, developer.mozilla.org, crates.io, stackoverflow.com, cve.mitre.org, nvd.nist.gov); already-present github.com / pypi.org / npmjs.org not duplicated; searx.diante.me stays exact-only, no diante.me wildcard. - Allowlist worker wiring: _docker_task_context now passes a set, non-empty BROWSER_ALLOWED_HOSTS from the worker env into [mcp_servers.playwright.env] in the tenant config, so the MCP process actually sees it (container -e alone does not reach MCP subprocesses, 2026-10-30). Unset/empty writes nothing and never overwrites; the value never goes into logs; it is not added to the websearch env block or the container env. ensure_playwright_mcp_env now returns False without rewriting when the result would be identical (canonical join: one blank line before the block), so a second prep leaves an unchanged tenant config alone; other sections untouched. - Skill + docs: browser-automation SKILL.md multi-tab/allowlist section; docs/platform-browser.md comparison doc (new file). - Tests (mock/fake only, no network, no real Chromium, no real credentials): cloud.tests.test_playwright + cloud.tests.test_websearch_worker, 48 tests OK, including 6 new wiring tests (switch off passes no variable, switch on reaches MCP env verbatim, empty never written, old-tenant merge idempotent + no-rewrite, ensure no-op when identical, allowlist enforces only after wiring). - NOT done (see PR body): no persistent profile, no credential vault, no approval card, no CAPTCHA bypass, in-page link navigation does not pass the allowlist, no real-Chromium live verification, host tinyproxy filter not reloaded.
98 lines
5.2 KiB
Markdown
98 lines
5.2 KiB
Markdown
---
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name: browser-automation
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description: >
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Use when a task needs a real browser: pages that render with
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JavaScript, clicking through pagination or forms, filling and
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submitting input, or taking a screenshot of what a page
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actually looks like. For a plain static page or a quick fact,
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use web_fetch / web_search first; open the browser only when
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static fetch cannot see the content.
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---
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## 工具
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`browser_navigate`(打开 URL,返回最终 URL 与标题)、
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`browser_snapshot`(当前页标题、URL、正文,超 8000 字截断并标记)、
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`browser_click`(按 CSS 选择器或 `text=...` 点击)、
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`browser_fill`(按选择器填表)、
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`browser_evaluate`(在页内跑 JS 表达式,返回字符串,限 4000 字)、
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`browser_screenshot`(把当前页存成工作区内的 PNG,返回绝对路径与字节数)、
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`browser_click_at`(按视口坐标点击,坐标系为 1280x800、原点左上角,
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是 live 视图里用户点击的落点)、
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`browser_live_shot`(把当前画面存成固定文件 browser-live.png,
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附带 browser-live.json 状态:URL、标题、时间戳,供 watcher 轮询)、
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`browser_close`(关闭浏览器,可重复调用)。
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浏览器是单页的:一次 navigate,之后 snapshot / click / fill /
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screenshot 都针对同一页;要换页再 navigate。
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## live 视图(第一期)
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有人在看浏览器时,每次 navigate / click / fill / click_at 之后
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都要调一次 `browser_live_shot`,让 browser-live.png 保持最新;
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不要只在最后截图一次。用户在 live 图上点的坐标会以 x/y 到达
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`browser_click_at`,点完必须再 snapshot 一次确认变化,再调
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`browser_live_shot` 刷新画面。
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## 远控接管(第二期)
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用户可以在控制台接管浏览器:接管期间(holder=user)你的
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所有 browser_* 工具都会直接报错“user holds browser control”,
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不要重试、不要 close 浏览器,停下来等用户交还;交还后
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(holder 回到 agent)下一条继续消息会让你续跑,续跑前先
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snapshot 一次看清用户改动到哪了。
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新工具:`browser_snapshot_refs`(带 ref 的元素清单,点
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`browser_click_ref` 比 CSS 选择器稳,页面重渲染后先重新
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snapshot_refs 再点);`browser_mouse_move` / `browser_key_press` /
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`browser_type_text`(键盘与鼠标,远控输入与 agent 工具同源)。
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## 规则
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1. 先 navigate,再 snapshot 看实际渲染结果;click / fill 后
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必须再 snapshot 一次确认变化,不要凭猜测汇报。
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2. 截图产出后用 shell / PIL 重新打开验证(格式、尺寸、非 0
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字节)再交给用户;失败时贴出工具报错,不要换一张别的图顶替。
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3. 网络走 egress 代理:不在 Tinyproxy 白名单里的域名会报
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代理 403,这时如实说明,不要绕过白名单。
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4. file:// URL 可用于打开工作区内已写好的测试页(验证 JS
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执行、表单行为),是比外网更可靠的自测手段。
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5. 不要用浏览器做静态抓取能做的事;不要用 evaluate 绕过
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click / fill 的正常路径去改页面状态,除非 snapshot 已证明
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正常路径走不通。
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## 多页与域名白名单(本期新增)
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多页工具:`browser_new_page`(开新页并切到它,每次
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new_page 都是全新 Playwright context,cookie 与存储天然
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隔离,适合同时登录两个账号或对照两个页面)、
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`browser_list_pages`(列出全部页:index、URL、标题、
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哪一页是当前页;浏览器未启动时不启动,只返回空列表)、
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`browser_switch_page`(按 index 切到指定页,之后
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navigate / snapshot / click / fill / screenshot 都针对该页;
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切到不存在的 index 会明确报错,不会崩掉 MCP,当前页不变;
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切换后旧页的 snapshot_refs 全部失效,要重新 snapshot_refs)、
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`browser_close_page`(关一页,缺省关当前页;关当前页后
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自动切到上一页;关最后一页会明确报错,改用
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`browser_close` 关整个浏览器)。
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域名白名单:环境变量 `BROWSER_ALLOWED_HOSTS`(逗号列表,
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如 `example.com,.python.org`)。未设置时行为完全不变,
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只靠 egress 代理白名单;设置后 navigate 在启动浏览器之前
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就检查:`file://` 一律放行,`http(s)` 的 host 必须命中列表
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(前导点条目做后缀匹配:`.python.org` 同时放行
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`python.org` 与 `docs.python.org`,不放行
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`notpython.org`),大小写与端口不影响匹配,未命中直接
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报错且不启动 Chromium。`localhost` / `127.0.0.1` 没有
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特殊待遇:本地开发服务器要自己把它列进变量,否则会被挡。
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清理:`browser_close` 会关掉全部页,并尽力删除工作区里的
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`browser-live.png` 与 `browser-live.json`(删不掉也不报错),
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所以 close 之后不要再拿旧 live 文件当“当前画面”汇报;
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单个截图(`browser_screenshot` 的 `shot-*.png`)不受影响。
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不在本轨范围:下载没有落盘清单(下载仍只落工作区文件,
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无统一清单可查);没有持久 profile(每次 MCP 进程结束
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cookie 即丢);没有登录保险库(账号密码仍不进浏览器工具)。
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需要这些时不要假装已有,先如实说明缺口。
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