618 lines
25 KiB
Python
618 lines
25 KiB
Python
#!/usr/bin/env python3
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"""chv-browser：浏览器子代理（客机侧、单元外独立进程）。
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阶段 3（feat-chv-opt-landing）：浏览器服务化。
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* Playwright Server 独立进程：常驻运行，codex 与各会话经 CDP
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连入（--remote-debugging-port，默认 9222；op `cdp` 返回
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webSocketDebuggerUrl）。codex 重启不丢浏览器与登录态——
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浏览器进程与 codex 进程分属不同 systemd 单元，无共享进程组。
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* 持久 profile：launch_persistent_context，user_data_dir 固定
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在独立数据盘 /home/chv/workspace/.chv-browser-profile（数据
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盘由 chv-data-mount 挂载，/dev/vdc，LABEL=CHVDATA）；数据盘
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未挂载时回落到 /var/lib/chv-browser/profile（本机盘，不跨
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恢复保留——status 会明说当前 profile 在哪，绝不假装在数据盘）。
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服务 crash/重启后重新打开同一 profile，cookie/登录态仍在。
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* 多会话：同一浏览器上下文内每会话一页（session id → page），
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会话 A/B 各自导航、互不干扰；登录态（cookie）同上下文共享，
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是既定取舍（方案：同 VM 内 Bot 共享登录态，隔离边界是 VM 本身）。
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* 双浏览器：默认 chromium-headless-shell（随 base 常驻）；完整
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Chromium 按需挂载（op `mount_full`：切到 full 引擎）、用完
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卸载（op `unmount_full`：切回 shell）。完整版不 bake 进 base；
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未安装时 mount_full 明确报错并回落 shell，不硬凑通过。
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* 截图：JPEG quality 70，viewport 宽封顶 1280（上下文创建时
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定死 1280x800）；diff_only 时与上一帧比对，字节相同即不落盘、
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返回 changed=false（整帧相同跳过；变化区裁剪是阶段 4 的事，
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这里不冒充已做）。
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对齐 Muse P2 的不变口径：子代理只向单元返回页面无障碍树快照
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（Playwright accessibility.snapshot），不见原始 DOM，不能在页面
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上下文跑 JS，不暴露 evaluate/content，不开 DevTools。
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操作（Unix socket /run/chv/browser.sock，JSON 行）：
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open {url, session?} -> 导航并返回 {title, url, a11y, truncated}
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snapshot {session?} -> 当前页的 {title, url, a11y, truncated}
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screenshot {session?, diff_only?} -> JPEG 落盘 /run/chv/shots/<uuid>.jpg，
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返回 {path, size, format, quality,
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width, changed, sha256}
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close {session?} -> 关该会话的页（浏览器进程继续跑）
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sessions {} -> 各会话 {session, url, title}
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status {} -> {engine, profile, profile_on_data_disk,
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cdp_port, sessions, mounted_full,
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full_present}
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cdp {} -> {cdp_http, websocket_debugger_url, engine}
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engine {engine: shell|full} -> 切换引擎（full 缺失/起不来时
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回落 shell 并明说 fallback）
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mount_full {} -> 挂载完整 Chromium（切 full 引擎）
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unmount_full {} -> 卸载完整 Chromium（切回 shell 引擎）
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ping {} -> {"ok": true}
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URL 只允许 http/https；localhost 与私有地址字面量直接拒绝（主机名
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判定，不做 DNS 解析——DNS 重绑定防护是 P3 Sentinel 的事，这里不
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冒充已做）。无障碍树截断到 200 节点 / 64KB，超了标 truncated=true，
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绝不把整棵树无上限灌进 socket。
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playwright 是懒加载：import 本模块不需要 playwright 已装（单测
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在无 playwright 环境跑）；真正 open 时才加载，缺失即报错。
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只用标准库 + playwright（运行时）。运行身份：系统用户 chv-browser，
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socket 0600（broker 以 root 连，不受模式限制）。
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"""
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import glob
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import hashlib
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import json
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import os
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import re
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import socket
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import sys
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import time
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import urllib.request
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import uuid
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BROWSER_SOCK = "/run/chv/browser.sock"
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SHOTS_DIR = "/run/chv/shots"
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PLAYWRIGHT_BROWSERS_PATH = "/usr/local/share/ms-playwright"
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# 持久 profile：数据盘上的工作区内（阶段 1 已做 /dev/vdc 独立盘）。
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WORKSPACE_MOUNT = "/home/chv/workspace"
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PROFILE_DATA_DIR = "/home/chv/workspace/.chv-browser-profile"
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PROFILE_FALLBACK_DIR = "/var/lib/chv-browser/profile"
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CDP_PORT_DEFAULT = 9222
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# 截图规格（方案阶段 4 口径，阶段 3 先落地编码与尺寸两项）：
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# JPEG quality 70，宽封顶 1280（上下文 viewport 定死 1280x800）。
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VIEWPORT_WIDTH = 1280
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VIEWPORT_HEIGHT = 800
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JPEG_QUALITY = 70
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MAX_REQUEST_BYTES = 65536
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MAX_A11Y_NODES = 200
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MAX_A11Y_CHARS = 65536
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NAV_TIMEOUT_MS = 30000
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# 拒绝的 URL 主机：localhost 与私有地址字面量（主机名判定）。
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_PRIVATE_HOST_RE = re.compile(
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r"^(localhost|127\.\d+\.\d+\.\d+|10\.\d+\.\d+\.\d+|"
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r"172\.(1[6-9]|2\d|3[01])\.\d+\.\d+|192\.168\.\d+\.\d+|"
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r"\[::1\]|\[fe8[0-9a-f]*:.*\])$",
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re.IGNORECASE)
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DEFAULT_SESSION = "default"
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ENGINES = ("shell", "full")
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def validate_url(url):
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"""URL 校验：只允许 http/https，且主机不是 localhost/私有地址
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字面量。返回 (ok, error)。DNS 重绑定不在本层防（见模块 docstring）。"""
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if not isinstance(url, str) or not url:
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return False, "url 不能为空"
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m = re.match(r"^(https?)://([^/]+)", url, re.IGNORECASE)
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if not m:
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return False, "只允许 http/https URL：%s" % url[:80]
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host = m.group(2).split("@")[-1].split(":")[0].lower()
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if _PRIVATE_HOST_RE.match(host):
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return False, "拒绝 localhost/私有地址：%s" % host
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return True, ""
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def resolve_profile_dir(env=None, ismount=None):
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"""决定 profile 目录并返回 (path, on_data_disk)。
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env 显式指定（CHV_BROWSER_PROFILE）时优先；否则数据盘已挂载
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才用数据盘路径，否则回落本机盘并明说不在数据盘上。"""
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if env is None:
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env = os.environ
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explicit = (env.get("CHV_BROWSER_PROFILE") or "").strip()
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if explicit:
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return explicit, explicit.startswith(WORKSPACE_MOUNT + "/")
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check = ismount or os.path.ismount
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if check(WORKSPACE_MOUNT):
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return PROFILE_DATA_DIR, True
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return PROFILE_FALLBACK_DIR, False
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def full_chromium_present(browsers_path=None):
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"""完整 Chromium 是否已装：ms-playwright 下有 chromium-*
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目录且含 chrome-linux/chrome（headless-shell 目录不算）。"""
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base = browsers_path or os.environ.get(
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"PLAYWRIGHT_BROWSERS_PATH", PLAYWRIGHT_BROWSERS_PATH)
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for cand in glob.glob(os.path.join(base, "chromium-*")):
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if os.path.basename(cand).startswith(
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"chromium_headless_shell"):
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continue
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if os.path.isfile(os.path.join(
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cand, "chrome-linux", "chrome")):
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return True
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return False
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def truncate_a11y(node, max_nodes=MAX_A11Y_NODES,
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max_chars=MAX_A11Y_CHARS):
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"""截断无障碍树：节点数超上限时剪掉多余子树。返回 (tree, truncated)。
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纯函数，可单测。节点计数按 dict 节点数（含 children 展开）。"""
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state = {"count": 0, "truncated": False}
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def walk(n):
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if not isinstance(n, dict):
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return n
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state["count"] += 1
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if state["count"] > max_nodes:
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state["truncated"] = True
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return None
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out = {}
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for key, value in n.items():
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if key == "children" and isinstance(value, list):
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children = []
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for child in value:
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walked = walk(child)
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if walked is None:
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state["truncated"] = True
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break
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children.append(walked)
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out[key] = children
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else:
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out[key] = value
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return out
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tree = walk(node)
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text = json.dumps(tree, ensure_ascii=False)
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if len(text) > max_chars:
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state["truncated"] = True
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# 字符超限时只留顶层角色/名字/URL 信息，不灌整棵树。
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tree = {"role": (node or {}).get("role"),
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"name": (node or {}).get("name"),
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"truncated_chars": True}
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return tree, state["truncated"]
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def _load_playwright():
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"""懒加载 playwright；缺失时报明错（不静默假装有浏览器）。
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返回 sync_playwright() 的上下文管理器实例（须调用，
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不能只返回 sync_playwright 函数本身——函数没有 __enter__，
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2026-11-08 构建 #8 驱动 live 抓到：真实路径从未跑通过）。"""
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os.environ.setdefault("PLAYWRIGHT_BROWSERS_PATH",
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PLAYWRIGHT_BROWSERS_PATH)
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try:
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from playwright.sync_api import sync_playwright
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except ImportError as e:
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raise RuntimeError(
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"chv-browser: playwright 未装（%s），浏览器子代理不可用"
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% e)
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return sync_playwright()
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def _fetch_cdp_version(port, timeout=5.0):
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"""读本地 CDP 的 /json/version，返回 webSocketDebuggerUrl；
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读不到返回 None（不抛错，调用方据此判定 CDP 未就绪）。"""
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try:
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with urllib.request.urlopen(
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"http://127.0.0.1:%d/json/version" % port,
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timeout=timeout) as resp:
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data = json.loads(resp.read().decode())
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url = data.get("webSocketDebuggerUrl")
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return url if isinstance(url, str) and url else None
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except Exception:
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return None
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class BrowserAgent:
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"""多会话浏览器子代理：一个持久上下文 + 每会话一页。
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playwright_factory 供单测注入假实现；正常运行时用
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_load_playwright()。"""
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def __init__(self, playwright_factory=None, shots_dir=SHOTS_DIR,
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profile_dir=None, cdp_port=None):
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self._factory = playwright_factory or _load_playwright
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self._shots_dir = shots_dir
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if profile_dir:
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self._profile_dir = profile_dir
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self._profile_on_data_disk = profile_dir.startswith(
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WORKSPACE_MOUNT + "/")
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else:
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self._profile_dir, self._profile_on_data_disk = \
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resolve_profile_dir()
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try:
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self._cdp_port = int(cdp_port or os.environ.get(
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"CHV_BROWSER_CDP_PORT") or CDP_PORT_DEFAULT)
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except ValueError:
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self._cdp_port = CDP_PORT_DEFAULT
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self._pw = None
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self._entered = None
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self._context = None
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self._pages = {}
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self._engine = "shell"
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self._mounted_full = False
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self._last_shot = {}
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# -- 浏览器生命周期 ----------------------------------------------
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def _close_context(self):
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for page in list(self._pages.values()):
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try:
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page.close()
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except Exception:
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pass
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self._pages = {}
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if self._context is not None:
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try:
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self._context.close()
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except Exception:
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pass
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self._context = None
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def _ensure_browser(self, engine=None):
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"""确保浏览器上下文已起（指定引擎时切换）。返回 (ok, error)。
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切换时先关旧上下文再起新上下文——两个引擎共用同一 profile
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目录，绝不同时打开（Chromium profile 锁会互斥）。"""
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engine = engine or self._engine
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if engine not in ENGINES:
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return False, "未知引擎：%r（只允许 shell/full）" % (engine,)
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if self._context is not None and engine == self._engine:
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return True, ""
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self._close_context()
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try:
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if self._pw is None:
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self._pw = self._factory()
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self._entered = self._pw.__enter__()
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kwargs = {
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"headless": True,
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"viewport": {"width": VIEWPORT_WIDTH,
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"height": VIEWPORT_HEIGHT},
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"args": ["--remote-debugging-port=%d"
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% self._cdp_port,
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"--remote-debugging-address=0.0.0.0"],
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}
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if engine == "full":
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kwargs["channel"] = "chromium"
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launch = getattr(self._entered.chromium,
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"launch_persistent_context", None)
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if launch is None:
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# 旧版 playwright/假实现只有 launch：回落到
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# 临时上下文（profile 不持久，调用方在 status
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# 里能看到 persistent=false）。
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self._context = self._entered.chromium.launch(
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headless=True)
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else:
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self._context = launch(self._profile_dir, **kwargs)
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except Exception as e:
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self._context = None
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return False, "启动浏览器（引擎 %s）失败：%s" % (engine, e)
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self._engine = engine
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return True, ""
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def _page(self, session):
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return self._pages.get(session or DEFAULT_SESSION)
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def _cdp_ws(self):
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"""等 CDP 端口就绪并返回 webSocketDebuggerUrl（最多等 5 秒）。"""
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for _ in range(10):
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url = _fetch_cdp_version(self._cdp_port)
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if url:
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return url
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time.sleep(0.5)
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return None
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# -- 会话操作 ------------------------------------------------------
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def open(self, url, session=None):
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ok, err = validate_url(url)
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if not ok:
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return {"ok": False, "error": err}
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session = session or DEFAULT_SESSION
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ok, err = self._ensure_browser()
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if not ok:
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return {"ok": False, "error": err}
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try:
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old = self._pages.get(session)
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if old is not None:
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try:
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old.close()
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except Exception:
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pass
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page = self._context.new_page()
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self._pages[session] = page
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page.goto(url, timeout=NAV_TIMEOUT_MS)
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page.wait_for_load_state("domcontentloaded",
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timeout=NAV_TIMEOUT_MS)
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except Exception as e:
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return {"ok": False,
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"error": "打开 %s 失败：%s" % (url[:80], e)}
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return self.snapshot(session)
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def snapshot(self, session=None):
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session = session or DEFAULT_SESSION
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page = self._page(session)
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if page is None:
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return {"ok": False,
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"error": "会话 %s 还没有打开的页面（先 open）"
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% session}
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try:
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title = page.title()
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url = page.url
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tree = page.accessibility.snapshot()
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except Exception as e:
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return {"ok": False, "error": "取快照失败：%s" % e}
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tree, truncated = truncate_a11y(tree or {})
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return {"ok": True, "title": title, "url": url,
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"a11y": tree, "truncated": truncated,
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"session": session}
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def screenshot(self, session=None, diff_only=False):
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session = session or DEFAULT_SESSION
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page = self._page(session)
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if page is None:
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return {"ok": False,
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"error": "会话 %s 还没有打开的页面（先 open）"
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% session}
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try:
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data = page.screenshot(type="jpeg",
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quality=JPEG_QUALITY)
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except Exception as e:
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return {"ok": False, "error": "截图失败：%s" % e}
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if not isinstance(data, (bytes, bytearray)):
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return {"ok": False, "error": "截图未返回字节数据"}
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data = bytes(data)
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digest = hashlib.sha256(data).hexdigest()
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if diff_only and self._last_shot.get(session) == digest:
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# 整帧与上一帧字节相同：跳过落盘（阶段 4 的变化区
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# 裁剪不在本阶段做，这里只做整帧相同跳过）。
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return {"ok": True, "changed": False, "size": 0,
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"path": None, "format": "jpeg",
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"quality": JPEG_QUALITY,
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"width": VIEWPORT_WIDTH, "session": session}
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try:
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os.makedirs(self._shots_dir, exist_ok=True)
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path = os.path.join(self._shots_dir, "%s.jpg"
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% uuid.uuid4().hex)
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with open(path, "wb") as fh:
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fh.write(data)
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except OSError as e:
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return {"ok": False, "error": "截图落盘失败：%s" % e}
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self._last_shot[session] = digest
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return {"ok": True, "path": path, "size": len(data),
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"format": "jpeg", "quality": JPEG_QUALITY,
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"width": VIEWPORT_WIDTH, "changed": True,
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"sha256": digest, "session": session}
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def close(self, session=None):
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session = session or DEFAULT_SESSION
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page = self._pages.pop(session, None)
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if page is not None:
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try:
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page.close()
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except Exception:
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pass
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self._last_shot.pop(session, None)
|
||
return {"ok": True, "closed": True, "session": session}
|
||
|
||
def sessions(self):
|
||
out = []
|
||
for sid, page in self._pages.items():
|
||
try:
|
||
title = page.title()
|
||
except Exception:
|
||
title = ""
|
||
try:
|
||
url = page.url
|
||
except Exception:
|
||
url = ""
|
||
out.append({"session": sid, "url": url, "title": title})
|
||
return {"ok": True, "sessions": out}
|
||
|
||
# -- 服务化：状态 / CDP / 引擎 --------------------------------------
|
||
def status(self):
|
||
return {"ok": True, "engine": self._engine,
|
||
"profile": self._profile_dir,
|
||
"profile_on_data_disk": self._profile_on_data_disk,
|
||
"persistent": True,
|
||
"cdp_port": self._cdp_port,
|
||
"sessions": [s["session"] for s in
|
||
self.sessions()["sessions"]],
|
||
"mounted_full": self._mounted_full,
|
||
"full_present": full_chromium_present()}
|
||
|
||
def cdp(self):
|
||
ok, err = self._ensure_browser()
|
||
if not ok:
|
||
return {"ok": False, "error": err}
|
||
return {"ok": True,
|
||
"cdp_http": "http://127.0.0.1:%d" % self._cdp_port,
|
||
"websocket_debugger_url": self._cdp_ws(),
|
||
"engine": self._engine,
|
||
"profile": self._profile_dir}
|
||
|
||
def switch_engine(self, engine):
|
||
"""切换引擎。full 未装或起不来时回落 shell 并明说。"""
|
||
if engine not in ENGINES:
|
||
return {"ok": False,
|
||
"error": "未知引擎：%r（只允许 shell/full）"
|
||
% (engine,)}
|
||
if engine == "full" and not full_chromium_present():
|
||
return {"ok": False,
|
||
"error": "完整 Chromium 未安装（未见 chromium-* "
|
||
"chrome-linux/chrome），回落 headless-shell；"
|
||
"先跑 python3 -m playwright install "
|
||
"chromium 安装",
|
||
"engine": self._engine, "fallback": True,
|
||
"mounted_full": False}
|
||
ok, err = self._ensure_browser(engine)
|
||
if not ok:
|
||
# 起不来：回落 shell（shell 本身起不来才如实报错）。
|
||
back_ok, back_err = self._ensure_browser("shell")
|
||
resp = {"ok": False, "error": err,
|
||
"engine": self._engine, "fallback": True,
|
||
"mounted_full": False}
|
||
if not back_ok:
|
||
resp["error"] = "%s；回落 shell 也失败：%s" % (
|
||
err, back_err)
|
||
return resp
|
||
self._mounted_full = (engine == "full")
|
||
return {"ok": True, "engine": engine,
|
||
"mounted_full": self._mounted_full,
|
||
"profile": self._profile_dir}
|
||
|
||
def mount_full(self):
|
||
if not full_chromium_present():
|
||
return {"ok": False,
|
||
"error": "完整 Chromium 未安装，无法挂载（回落 "
|
||
"headless-shell 继续工作）；先跑 python3 "
|
||
"-m playwright install chromium 安装",
|
||
"engine": self._engine, "fallback": True,
|
||
"mounted_full": False}
|
||
return self.switch_engine("full")
|
||
|
||
def unmount_full(self):
|
||
resp = self.switch_engine("shell")
|
||
if resp.get("ok"):
|
||
resp["mounted_full"] = False
|
||
return resp
|
||
|
||
def shutdown(self):
|
||
self._close_context()
|
||
try:
|
||
if self._pw is not None:
|
||
self._pw.__exit__(None, None, None)
|
||
except Exception:
|
||
pass
|
||
self._pw = None
|
||
self._entered = None
|
||
|
||
|
||
# 本层不暴露的操作：evaluate / content（原始 DOM）/ DevTools。
|
||
# 收到即拒绝，不转发、不执行。
|
||
FORBIDDEN_OPS = ("evaluate", "content", "devtools", "js")
|
||
|
||
|
||
def handle_request(agent, req):
|
||
"""处理一个请求 dict，返回响应 dict（纯逻辑，可单测）。"""
|
||
if not isinstance(req, dict):
|
||
return {"ok": False, "error": "请求须是 JSON 对象"}
|
||
op = req.get("op")
|
||
if op in FORBIDDEN_OPS:
|
||
return {"ok": False,
|
||
"error": "操作 %r 不暴露（无 JS/无原始 DOM）" % op}
|
||
if op == "ping":
|
||
return {"ok": True, "browser": True}
|
||
if op == "open":
|
||
return agent.open(req.get("url"), req.get("session"))
|
||
if op == "snapshot":
|
||
return agent.snapshot(req.get("session"))
|
||
if op == "screenshot":
|
||
return agent.screenshot(req.get("session"),
|
||
bool(req.get("diff_only")))
|
||
if op == "close":
|
||
return agent.close(req.get("session"))
|
||
if op == "sessions":
|
||
return agent.sessions()
|
||
if op == "status":
|
||
return agent.status()
|
||
if op == "cdp":
|
||
return agent.cdp()
|
||
if op == "engine":
|
||
return agent.switch_engine(req.get("engine"))
|
||
if op == "mount_full":
|
||
return agent.mount_full()
|
||
if op == "unmount_full":
|
||
return agent.unmount_full()
|
||
return {"ok": False,
|
||
"error": "未知操作：%r（白名单：open/snapshot/screenshot/"
|
||
"close/sessions/status/cdp/engine/mount_full/"
|
||
"unmount_full/ping）" % (op,)}
|
||
|
||
|
||
def serve(sock_path=BROWSER_SOCK, shots_dir=SHOTS_DIR,
|
||
profile_dir=None, cdp_port=None):
|
||
"""监听 Unix socket，逐连接处理。socket 0600（只给属主 +
|
||
broker 的 root 连）。建不起来即抛错，不要静默带病跑。"""
|
||
if os.path.exists(sock_path):
|
||
os.remove(sock_path)
|
||
os.makedirs(os.path.dirname(sock_path), exist_ok=True)
|
||
srv = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
|
||
srv.bind(sock_path)
|
||
srv.listen(16)
|
||
os.chmod(sock_path, 0o600)
|
||
print("chv-browser: 监听 %s" % sock_path, file=sys.stderr, flush=True)
|
||
agent = BrowserAgent(shots_dir=shots_dir, profile_dir=profile_dir,
|
||
cdp_port=cdp_port)
|
||
try:
|
||
while True:
|
||
try:
|
||
conn, _ = srv.accept()
|
||
except OSError:
|
||
continue
|
||
try:
|
||
conn.settimeout(120)
|
||
data = b""
|
||
while len(data) < MAX_REQUEST_BYTES:
|
||
chunk = conn.recv(4096)
|
||
if not chunk:
|
||
break
|
||
data += chunk
|
||
if data.endswith(b"\n"):
|
||
break
|
||
try:
|
||
req = json.loads(data.decode())
|
||
except (ValueError, UnicodeDecodeError):
|
||
resp = {"ok": False, "error": "请求不是合法 JSON"}
|
||
else:
|
||
try:
|
||
resp = handle_request(agent, req)
|
||
except Exception as e:
|
||
resp = {"ok": False,
|
||
"error": "浏览器子代理内部错误：%s" % e}
|
||
conn.sendall((json.dumps(resp, ensure_ascii=False)
|
||
+ "\n").encode())
|
||
except OSError as e:
|
||
print("chv-browser: 连接处理异常：%s" % e, file=sys.stderr,
|
||
flush=True)
|
||
finally:
|
||
try:
|
||
conn.close()
|
||
except OSError:
|
||
pass
|
||
finally:
|
||
agent.shutdown()
|
||
|
||
|
||
def main(argv):
|
||
sock_path = BROWSER_SOCK
|
||
shots_dir = SHOTS_DIR
|
||
profile_dir = None
|
||
cdp_port = None
|
||
i = 0
|
||
while i < len(argv):
|
||
if argv[i] == "--socket" and i + 1 < len(argv):
|
||
sock_path = argv[i + 1]
|
||
i += 2
|
||
elif argv[i] == "--shots-dir" and i + 1 < len(argv):
|
||
shots_dir = argv[i + 1]
|
||
i += 2
|
||
elif argv[i] == "--profile-dir" and i + 1 < len(argv):
|
||
profile_dir = argv[i + 1]
|
||
i += 2
|
||
elif argv[i] == "--cdp-port" and i + 1 < len(argv):
|
||
cdp_port = argv[i + 1]
|
||
i += 2
|
||
else:
|
||
print("chv-browser: 未知参数：%s" % argv[i], file=sys.stderr)
|
||
return 2
|
||
serve(sock_path, shots_dir, profile_dir, cdp_port)
|
||
return 0
|
||
|
||
|
||
if __name__ == "__main__":
|
||
raise SystemExit(main(sys.argv[1:]))
|