fix(login): remove cookie fast-path from login subcommand

Problem: `:CP <platform> login` short-circuited on cached cookies/tokens.
If an old session was still valid, the new credentials were never tested,
so the user got "login successful" even with garbage input.

Solution: Always validate credentials against the platform in the login
path. Remove cookie/token loading from `_login_headless` (AtCoder),
`_login_headless_cf` (CF), `_login_headless_codechef` (CodeChef), and
`login` (CSES). For USACO submit, replace the `_check_usaco_login`
roundtrip with cookie trust + retry-on-auth-failure (the Kattis pattern).
Submit paths are unchanged — cookie fast-paths remain for contest speed.

Closes #331
This commit is contained in:
Barrett Ruth 2026-03-06 17:52:05 -05:00
parent 8465e70772
commit 84343d2045
5 changed files with 110 additions and 141 deletions

View file

@ -306,12 +306,6 @@ def _login_headless(credentials: dict[str, str]) -> LoginResult:
cookie_cache = Path.home() / ".cache" / "cp-nvim" / "atcoder-cookies.json"
cookie_cache.parent.mkdir(parents=True, exist_ok=True)
saved_cookies: list[dict[str, Any]] = []
if cookie_cache.exists():
try:
saved_cookies = json.loads(cookie_cache.read_text())
except Exception:
pass
logged_in = False
login_error: str | None = None
@ -340,33 +334,25 @@ def _login_headless(credentials: dict[str, str]) -> LoginResult:
headless=True,
timeout=BROWSER_SESSION_TIMEOUT,
google_search=False,
cookies=saved_cookies if saved_cookies else [],
) as session:
if saved_cookies:
print(json.dumps({"status": "checking_login"}), flush=True)
session.fetch(
f"{BASE_URL}/home", page_action=check_login, network_idle=True
print(json.dumps({"status": "logging_in"}), flush=True)
session.fetch(
f"{BASE_URL}/login",
page_action=login_action,
solve_cloudflare=True,
)
if login_error:
return LoginResult(
success=False, error=f"Login failed: {login_error}"
)
session.fetch(
f"{BASE_URL}/home", page_action=check_login, network_idle=True
)
if not logged_in:
print(json.dumps({"status": "logging_in"}), flush=True)
session.fetch(
f"{BASE_URL}/login",
page_action=login_action,
solve_cloudflare=True,
return LoginResult(
success=False, error="Login failed (bad credentials?)"
)
if login_error:
return LoginResult(
success=False, error=f"Login failed: {login_error}"
)
session.fetch(
f"{BASE_URL}/home", page_action=check_login, network_idle=True
)
if not logged_in:
return LoginResult(
success=False, error="Login failed (bad credentials?)"
)
try:
browser_cookies = session.context.cookies()

View file

@ -65,12 +65,6 @@ def _login_headless_codechef(credentials: dict[str, str]) -> LoginResult:
_ensure_browser()
_COOKIE_PATH.parent.mkdir(parents=True, exist_ok=True)
saved_cookies: list[dict[str, Any]] = []
if _COOKIE_PATH.exists():
try:
saved_cookies = json.loads(_COOKIE_PATH.read_text())
except Exception:
pass
logged_in = False
login_error: str | None = None
@ -100,29 +94,21 @@ def _login_headless_codechef(credentials: dict[str, str]) -> LoginResult:
headless=True,
timeout=BROWSER_SESSION_TIMEOUT,
google_search=False,
cookies=saved_cookies if saved_cookies else [],
) as session:
if saved_cookies:
print(json.dumps({"status": "checking_login"}), flush=True)
session.fetch(
f"{BASE_URL}/", page_action=check_login, network_idle=True
print(json.dumps({"status": "logging_in"}), flush=True)
session.fetch(f"{BASE_URL}/login", page_action=login_action)
if login_error:
return LoginResult(
success=False, error=f"Login failed: {login_error}"
)
session.fetch(
f"{BASE_URL}/", page_action=check_login, network_idle=True
)
if not logged_in:
print(json.dumps({"status": "logging_in"}), flush=True)
session.fetch(f"{BASE_URL}/login", page_action=login_action)
if login_error:
return LoginResult(
success=False, error=f"Login failed: {login_error}"
)
session.fetch(
f"{BASE_URL}/", page_action=check_login, network_idle=True
return LoginResult(
success=False, error="Login failed (bad credentials?)"
)
if not logged_in:
return LoginResult(
success=False, error="Login failed (bad credentials?)"
)
try:
browser_cookies = session.context.cookies()

View file

@ -348,12 +348,6 @@ def _login_headless_cf(credentials: dict[str, str]) -> LoginResult:
cookie_cache = Path.home() / ".cache" / "cp-nvim" / "codeforces-cookies.json"
cookie_cache.parent.mkdir(parents=True, exist_ok=True)
saved_cookies: list[dict[str, Any]] = []
if cookie_cache.exists():
try:
saved_cookies = json.loads(cookie_cache.read_text())
except Exception:
pass
logged_in = False
login_error: str | None = None
@ -388,37 +382,27 @@ def _login_headless_cf(credentials: dict[str, str]) -> LoginResult:
headless=True,
timeout=BROWSER_SESSION_TIMEOUT,
google_search=False,
cookies=saved_cookies if saved_cookies else [],
) as session:
if saved_cookies:
print(json.dumps({"status": "checking_login"}), flush=True)
session.fetch(
f"{BASE_URL}/",
page_action=check_login,
network_idle=True,
print(json.dumps({"status": "logging_in"}), flush=True)
session.fetch(
f"{BASE_URL}/enter",
page_action=login_action,
solve_cloudflare=True,
)
if login_error:
return LoginResult(
success=False, error=f"Login failed: {login_error}"
)
session.fetch(
f"{BASE_URL}/",
page_action=check_login,
network_idle=True,
)
if not logged_in:
print(json.dumps({"status": "logging_in"}), flush=True)
session.fetch(
f"{BASE_URL}/enter",
page_action=login_action,
solve_cloudflare=True,
return LoginResult(
success=False, error="Login failed (bad credentials?)"
)
if login_error:
return LoginResult(
success=False, error=f"Login failed: {login_error}"
)
session.fetch(
f"{BASE_URL}/",
page_action=check_login,
network_idle=True,
)
if not logged_in:
return LoginResult(
success=False, error="Login failed (bad credentials?)"
)
try:
browser_cookies = session.context.cookies()

View file

@ -239,21 +239,6 @@ class CSESScraper(BaseScraper):
return self._login_error("Missing username or password")
async with httpx.AsyncClient(follow_redirects=True) as client:
token = credentials.get("token")
if token:
print(json.dumps({"status": "checking_login"}), flush=True)
if await self._check_token(client, token):
return LoginResult(
success=True,
error="",
credentials={
"username": username,
"password": password,
"token": token,
},
)
print(json.dumps({"status": "logging_in"}), flush=True)
token = await self._web_login(client, username, password)
if not token:

View file

@ -423,11 +423,7 @@ class USACOScraper(BaseScraper):
async with httpx.AsyncClient(follow_redirects=True) as client:
await _load_usaco_cookies(client)
print(json.dumps({"status": "checking_login"}), flush=True)
logged_in = bool(client.cookies) and await _check_usaco_login(
client, username
)
if not logged_in:
if not client.cookies:
print(json.dumps({"status": "logging_in"}), flush=True)
try:
ok = await _do_usaco_login(client, username, password)
@ -437,45 +433,77 @@ class USACOScraper(BaseScraper):
return self._submit_error("Login failed (bad credentials?)")
await _save_usaco_cookies(client)
print(json.dumps({"status": "submitting"}), flush=True)
try:
page_r = await client.get(
f"{_AUTH_BASE}/index.php?page=viewproblem2&cpid={problem_id}",
headers=HEADERS,
timeout=HTTP_TIMEOUT,
)
form_url, hidden_fields, lang_val = _parse_submit_form(
page_r.text, language_id
)
except Exception:
form_url = _AUTH_BASE + _SUBMIT_PATH
hidden_fields = {}
lang_val = None
data: dict[str, str] = {"cpid": problem_id, **hidden_fields}
data["language"] = lang_val if lang_val is not None else language_id
ext = "py" if "python" in language_id.lower() else "cpp"
try:
r = await client.post(
form_url,
data=data,
files={"sourcefile": (f"solution.{ext}", source, "text/plain")},
headers=HEADERS,
timeout=HTTP_TIMEOUT,
)
r.raise_for_status()
except Exception as e:
return self._submit_error(f"Submit request failed: {e}")
try:
resp = r.json()
sid = str(resp.get("submission_id", resp.get("id", "")))
except Exception:
sid = ""
return SubmitResult(
success=True, error="", submission_id=sid, verdict="submitted"
result = await self._do_submit(
client, problem_id, language_id, source
)
if result.success or result.error != "auth_failure":
return result
client.cookies.clear()
print(json.dumps({"status": "logging_in"}), flush=True)
try:
ok = await _do_usaco_login(client, username, password)
except Exception as e:
return self._submit_error(f"Login failed: {e}")
if not ok:
return self._submit_error("Login failed (bad credentials?)")
await _save_usaco_cookies(client)
return await self._do_submit(
client, problem_id, language_id, source
)
async def _do_submit(
self,
client: httpx.AsyncClient,
problem_id: str,
language_id: str,
source: bytes,
) -> SubmitResult:
print(json.dumps({"status": "submitting"}), flush=True)
try:
page_r = await client.get(
f"{_AUTH_BASE}/index.php?page=viewproblem2&cpid={problem_id}",
headers=HEADERS,
timeout=HTTP_TIMEOUT,
)
if "login" in page_r.url.path.lower() or "Login" in page_r.text[:2000]:
return self._submit_error("auth_failure")
form_url, hidden_fields, lang_val = _parse_submit_form(
page_r.text, language_id
)
except Exception:
form_url = _AUTH_BASE + _SUBMIT_PATH
hidden_fields = {}
lang_val = None
data: dict[str, str] = {"cpid": problem_id, **hidden_fields}
data["language"] = lang_val if lang_val is not None else language_id
ext = "py" if "python" in language_id.lower() else "cpp"
try:
r = await client.post(
form_url,
data=data,
files={"sourcefile": (f"solution.{ext}", source, "text/plain")},
headers=HEADERS,
timeout=HTTP_TIMEOUT,
)
r.raise_for_status()
except Exception as e:
return self._submit_error(f"Submit request failed: {e}")
try:
resp = r.json()
if resp.get("code") == 0 and "login" in resp.get("message", "").lower():
return self._submit_error("auth_failure")
sid = str(resp.get("submission_id", resp.get("id", "")))
except Exception:
sid = ""
return SubmitResult(
success=True, error="", submission_id=sid, verdict="submitted"
)
async def login(self, credentials: dict[str, str]) -> LoginResult:
username = credentials.get("username", "")
password = credentials.get("password", "")