juxtapoandClaude Opus 5
5419b08264
get_or_open_tab(activate=True) — added, not replaced. Read paths pass activate=False; post flows keep the foreground for dialogs and file inputs. check_login moved off DOM signals onto session state: fb c_user, ig/threads ds_user_id, twitter twid, yt ytcfg.LOGGED_IN. Three platforms were reporting OUT on a signed-in account because their composer never mounts in a hidden tab. The fixed sleep(4)/sleep(5) before each check goes with them — every signal reads present the moment navigate() returns. Unreadable cookies raise instead of returning False: "cannot tell" is not "signed out". tiktok untouched and still activated — it reported visibilityState "visible" from a sibling-activated tab, so it has never been read from a genuine background. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
428 lines
17 KiB
Python
428 lines
17 KiB
Python
"""CDP WebSocket client for socialmag.
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Talks to abang's already-running Brave over the Chrome DevTools Protocol
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(default endpoint: http://127.0.0.1:9222). No browser is launched here — if
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nothing is listening on 9222 we raise, loudly.
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Shape:
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cdp = CDPClient() # browser-level connection
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await cdp.connect()
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tab = await cdp.open_tab("https://www.threads.net/")
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await tab.wait_for(SEL)
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await tab.click(SEL)
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await tab.close()
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await cdp.close()
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Every failure raises CDPError. Nothing here returns a plausible default.
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"""
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import asyncio
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import base64
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import json
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import random
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import urllib.error
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import urllib.parse
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import urllib.request
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import websockets
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DEFAULT_HTTP_ENDPOINT = "http://127.0.0.1:9336"
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# Human-like pause between discrete actions (proposal: "random 0.5-2s").
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HUMAN_DELAY_MIN = 0.5
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HUMAN_DELAY_MAX = 1.5
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# How long a wait_for polls, and how often.
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DEFAULT_TIMEOUT = 20.0
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POLL_INTERVAL = 0.25
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class CDPError(RuntimeError):
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"""Anything the browser side got wrong. Never swallowed, never defaulted."""
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async def human_delay(lo=HUMAN_DELAY_MIN, hi=HUMAN_DELAY_MAX):
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await asyncio.sleep(random.uniform(lo, hi))
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def _http_get_json(url, timeout=5.0):
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try:
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with urllib.request.urlopen(url, timeout=timeout) as resp:
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return json.loads(resp.read().decode("utf-8"))
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except urllib.error.URLError as exc:
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port = urllib.parse.urlsplit(url).port
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raise CDPError(
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f"CDP endpoint unreachable at {url}: {exc}. "
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f"Is Brave running with --remote-debugging-port={port}?"
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) from exc
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except json.JSONDecodeError as exc:
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raise CDPError(f"CDP endpoint {url} returned non-JSON: {exc}") from exc
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class CDPClient:
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"""Browser-level CDP connection. Owns the socket, hands out Tabs."""
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def __init__(self, http_endpoint=DEFAULT_HTTP_ENDPOINT):
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self.http_endpoint = http_endpoint.rstrip("/")
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self._ws = None
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self._reader_task = None
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self._next_id = 0
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self._pending = {} # message id -> Future
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self._events = {} # session_id -> asyncio.Queue of (method, params)
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self.browser_version = None
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# ---- lifecycle -----------------------------------------------------
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async def connect(self):
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# NOTE: deliberately a plain blocking urlopen rather than
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# asyncio.to_thread — `queue.py` in this package shadows the stdlib
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# `queue` module, which concurrent.futures' thread pool imports. One
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# 5s call at startup, before anything else is running.
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version = _http_get_json(f"{self.http_endpoint}/json/version")
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ws_url = version.get("webSocketDebuggerUrl")
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if not ws_url:
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raise CDPError(
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f"/json/version has no webSocketDebuggerUrl: {version!r}"
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)
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self.browser_version = version.get("Browser")
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self._ws = await websockets.connect(ws_url, max_size=None)
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self._reader_task = asyncio.create_task(self._reader())
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return self
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async def close(self):
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if self._reader_task:
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self._reader_task.cancel()
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try:
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await self._reader_task
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except asyncio.CancelledError:
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pass
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self._reader_task = None
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if self._ws:
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await self._ws.close()
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self._ws = None
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async def __aenter__(self):
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return await self.connect()
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async def __aexit__(self, *exc):
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await self.close()
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# ---- plumbing ------------------------------------------------------
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async def _reader(self):
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async for raw in self._ws:
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msg = json.loads(raw)
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mid = msg.get("id")
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if mid is not None:
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fut = self._pending.pop(mid, None)
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if fut and not fut.done():
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fut.set_result(msg)
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continue
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session_id = msg.get("sessionId")
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queue = self._events.get(session_id)
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if queue is not None:
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queue.put_nowait((msg.get("method"), msg.get("params", {})))
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async def send(self, method, params=None, session_id=None, timeout=30.0):
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if self._ws is None:
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raise CDPError("CDPClient.send() before connect()")
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self._next_id += 1
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mid = self._next_id
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payload = {"id": mid, "method": method, "params": params or {}}
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if session_id:
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payload["sessionId"] = session_id
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fut = asyncio.get_running_loop().create_future()
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self._pending[mid] = fut
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await self._ws.send(json.dumps(payload))
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try:
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msg = await asyncio.wait_for(fut, timeout)
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except asyncio.TimeoutError as exc:
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self._pending.pop(mid, None)
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raise CDPError(f"CDP call timed out after {timeout}s: {method}") from exc
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if "error" in msg:
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raise CDPError(f"CDP {method} failed: {msg['error']}")
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return msg.get("result", {})
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# ---- tabs ----------------------------------------------------------
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async def list_targets(self):
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result = await self.send("Target.getTargets")
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return [t for t in result["targetInfos"] if t["type"] == "page"]
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async def _attach(self, target_id):
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result = await self.send(
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"Target.attachToTarget", {"targetId": target_id, "flatten": True}
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)
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session_id = result["sessionId"]
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self._events[session_id] = asyncio.Queue()
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tab = Tab(self, target_id, session_id)
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await tab.send("Page.enable")
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await tab.send("Runtime.enable")
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await tab.send("DOM.enable")
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return tab
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async def open_tab(self, url):
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"""Open a fresh tab and attach to it."""
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result = await self.send("Target.createTarget", {"url": url})
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tab = await self._attach(result["targetId"])
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await tab.wait_for_load()
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return tab
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async def attach_existing(self, url_contains):
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"""Attach to an already-open tab whose URL contains `url_contains`."""
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for info in await self.list_targets():
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if url_contains in info.get("url", ""):
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return await self._attach(info["targetId"])
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raise CDPError(f"no open tab whose URL contains {url_contains!r}")
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async def get_or_open_tab(self, url, url_contains, activate=True):
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"""Reuse a warm existing tab if one matches, otherwise open a fresh one.
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Returns (tab, reused: bool). Caller should skip tab.close() when reused.
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A reused tab is brought to the front by default — see Tab.activate() for
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why a backgrounded tab cannot be trusted to have rendered.
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`activate=False` is for callers that read a **JS-state** signal (a cookie,
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a page global) or the network, neither of which needs a rendered page.
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Measured 2026-09-12: X, Instagram and Threads all answer correctly with
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`document.visibilityState == "hidden"`. It is not for the post flows —
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those drive dialogs and file inputs, which need the foreground.
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"""
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try:
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tab = await self.attach_existing(url_contains)
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if activate:
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await tab.activate()
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return tab, True
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except CDPError:
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tab = await self.open_tab(url)
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return tab, False
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def _drop_session(self, session_id):
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self._events.pop(session_id, None)
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class Tab:
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"""One page target. All the verbs the platform modules use."""
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def __init__(self, client, target_id, session_id):
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self.client = client
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self.target_id = target_id
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self.session_id = session_id
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async def send(self, method, params=None, timeout=30.0):
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return await self.client.send(
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method, params, session_id=self.session_id, timeout=timeout
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)
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async def close(self):
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await self.client.send("Target.closeTarget", {"targetId": self.target_id})
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self.client._drop_session(self.session_id)
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async def activate(self):
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"""Bring this tab to the front.
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Not cosmetic. A backgrounded tab is not guaranteed to finish rendering:
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YouTube leaves its masthead as `#masthead-skeleton-icons` with an empty
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`#buttons` and never mounts `#avatar-btn`, so a login check that looks
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for a rendered element reads a signed-in account as signed out — and
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waiting does not help (measured 2026-09-11: still absent after 23s,
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while ytcfg LOGGED_IN was true the whole time).
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"""
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await self.client.send("Target.activateTarget", {"targetId": self.target_id})
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# ---- navigation ----------------------------------------------------
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async def navigate(self, url, timeout=DEFAULT_TIMEOUT):
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result = await self.send("Page.navigate", {"url": url})
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if result.get("errorText"):
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raise CDPError(f"navigate to {url} failed: {result['errorText']}")
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await self.wait_for_load(timeout)
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async def wait_for_load(self, timeout=DEFAULT_TIMEOUT):
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"""Wait for document.readyState == 'complete' (poll; simpler than
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racing Page.loadEventFired against an already-loaded target)."""
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deadline = asyncio.get_running_loop().time() + timeout
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while asyncio.get_running_loop().time() < deadline:
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state = await self.eval("document.readyState")
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if state == "complete":
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return
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await asyncio.sleep(POLL_INTERVAL)
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raise CDPError(f"page did not finish loading within {timeout}s: {await self.url()}")
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async def url(self):
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return await self.eval("location.href")
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# ---- evaluation ----------------------------------------------------
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async def eval(self, expression, await_promise=False):
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"""Evaluate JS, return the value. Throws loudly on JS exceptions."""
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result = await self.send(
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"Runtime.evaluate",
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{
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"expression": expression,
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"returnByValue": True,
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"awaitPromise": await_promise,
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"userGesture": True,
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},
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)
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if "exceptionDetails" in result:
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detail = result["exceptionDetails"]
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text = detail.get("exception", {}).get("description") or detail.get("text")
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raise CDPError(f"JS threw: {text}\n expression: {expression[:200]}")
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return result["result"].get("value")
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# ---- querying / waiting -------------------------------------------
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async def exists(self, selector):
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return bool(await self.eval(f"!!document.querySelector({json.dumps(selector)})"))
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async def wait_for(self, selector, timeout=DEFAULT_TIMEOUT, visible=True):
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"""Poll until selector is present (and, by default, has a box)."""
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check = (
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"(() => { const e = document.querySelector(%s); if (!e) return false;"
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" if (!%s) return true; const r = e.getBoundingClientRect();"
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" return r.width > 0 && r.height > 0; })()"
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% (json.dumps(selector), "true" if visible else "false")
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)
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deadline = asyncio.get_running_loop().time() + timeout
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while asyncio.get_running_loop().time() < deadline:
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if await self.eval(check):
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return True
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await asyncio.sleep(POLL_INTERVAL)
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raise CDPError(f"timed out after {timeout}s waiting for selector: {selector}")
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async def wait_for_gone(self, selector, timeout=DEFAULT_TIMEOUT):
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"""Poll until selector disappears — how every dialog flow confirms success."""
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deadline = asyncio.get_running_loop().time() + timeout
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while asyncio.get_running_loop().time() < deadline:
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if not await self.exists(selector):
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return True
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await asyncio.sleep(POLL_INTERVAL)
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raise CDPError(f"timed out after {timeout}s waiting for {selector} to disappear")
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async def wait_for_text(self, text, timeout=DEFAULT_TIMEOUT):
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"""Poll until the text appears anywhere in document.body."""
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expr = f"document.body.innerText.includes({json.dumps(text)})"
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deadline = asyncio.get_running_loop().time() + timeout
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while asyncio.get_running_loop().time() < deadline:
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if await self.eval(expr):
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return True
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await asyncio.sleep(POLL_INTERVAL)
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raise CDPError(f"timed out after {timeout}s waiting for text: {text!r}")
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# ---- interaction ---------------------------------------------------
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async def _box(self, selector):
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box = await self.eval(
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"(() => { const e = document.querySelector(%s); if (!e) return null;"
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" e.scrollIntoView({block:'center'});"
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" const r = e.getBoundingClientRect();"
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" return {x: r.left + r.width/2, y: r.top + r.height/2,"
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" w: r.width, h: r.height}; })()" % json.dumps(selector)
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)
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if not box:
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raise CDPError(f"element not found: {selector}")
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if box["w"] <= 0 or box["h"] <= 0:
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raise CDPError(f"element has zero size (not visible): {selector}")
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return box
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async def click(self, selector, delay=True):
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"""Real mouse click at the element's centre — the human-shaped path."""
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box = await self._box(selector)
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await asyncio.sleep(0.1)
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for kind in ("mousePressed", "mouseReleased"):
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await self.send(
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"Input.dispatchMouseEvent",
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{
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"type": kind,
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"x": box["x"],
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"y": box["y"],
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"button": "left",
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"clickCount": 1,
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},
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)
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await asyncio.sleep(random.uniform(0.04, 0.12))
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if delay:
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await human_delay()
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async def click_js(self, expression, delay=True):
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"""Click via JS on an element the expression returns.
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Facebook needs this: the composer's real click target is an ancestor
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[role=button], and mouse-clicking the visible span opens Messenger
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instead of the composer.
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"""
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ok = await self.eval(
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"(() => { const el = (%s); if (!el) return false; el.click(); return true; })()"
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% expression
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)
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if not ok:
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raise CDPError(f"click_js found no element for expression: {expression[:200]}")
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if delay:
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await human_delay()
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async def focus(self, selector):
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await self.eval(
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"(() => { const e = document.querySelector(%s);"
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" if (!e) throw new Error('focus: not found'); e.focus(); })()"
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% json.dumps(selector)
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)
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async def type_text(self, selector, text, per_char=False, delay=True):
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"""Focus `selector` then type. Default is Input.insertText (fast, and
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React contenteditables accept it); per_char sends real key events for
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editors that only listen to keydown."""
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await self.click(selector, delay=False)
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await asyncio.sleep(0.2)
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if per_char:
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for ch in text:
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await self.send("Input.dispatchKeyEvent", {"type": "keyDown", "text": ch})
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await self.send("Input.dispatchKeyEvent", {"type": "keyUp", "text": ch})
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await asyncio.sleep(random.uniform(0.02, 0.09))
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else:
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await self.send("Input.insertText", {"text": text})
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if delay:
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await human_delay()
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async def press_key(self, key, code=None, key_code=None):
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params = {"type": "keyDown", "key": key}
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if code:
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params["code"] = code
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if key_code:
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params["windowsVirtualKeyCode"] = key_code
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params["nativeVirtualKeyCode"] = key_code
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await self.send("Input.dispatchKeyEvent", params)
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await self.send("Input.dispatchKeyEvent", dict(params, type="keyUp"))
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# ---- file inputs ---------------------------------------------------
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async def set_file_input(self, selector, paths):
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"""DOM.setFileInputFiles — injects a file without the native picker.
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`selector` must resolve to an <input type=file>. Paths must be
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absolute and must exist (caller validates; we re-check the shape).
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"""
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if isinstance(paths, str):
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paths = [paths]
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doc = await self.send("DOM.getDocument", {"depth": 0})
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node = await self.send(
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"DOM.querySelector",
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{"nodeId": doc["root"]["nodeId"], "selector": selector},
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)
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node_id = node.get("nodeId")
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if not node_id:
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raise CDPError(f"no file input matched selector: {selector}")
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await self.send("DOM.setFileInputFiles", {"files": paths, "nodeId": node_id})
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await human_delay()
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# ---- diagnostics ---------------------------------------------------
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async def screenshot(self, path):
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"""Capture the page. Used on failure so a broken flow leaves a trace."""
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result = await self.send("Page.captureScreenshot", {"format": "png"})
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data = base64.b64decode(result["data"])
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with open(path, "wb") as fh:
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fh.write(data)
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return path
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