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feat(codeforces): implement submit; cache CSES token (#300)

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## Problem

Codeforces submit was a stub. CSES submit re-ran the full login flow on
every invocation (~1.5s overhead).

## Solution

**Codeforces**: headless browser submit via StealthySession (same
pattern as AtCoder). Solves Cloudflare Turnstile on login, uploads
source via file input, caches cookies at
`~/.cache/cp-nvim/codeforces-cookies.json` so repeat submits skip login.

**CSES**: persist the API token in credentials via a `credentials`
ndjson event. Subsequent submits validate the cached token with a single
GET before falling back to full login.

Also includes a vimdoc table of contents.
This commit is contained in:
Barrett Ruth 2026-03-05 10:37:39 -05:00 • committed by GitHub
parent e9f72dfbbc
commit 6fcb5d1bbc
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9 changed files with 307 additions and 96 deletions
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6
scrapers/usaco.py
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@ -8,6 +8,7 @@ from typing import Any, cast
import httpx
from .base import BaseScraper
from .timeouts import HTTP_TIMEOUT
from .models import (
ContestListResult,
ContestSummary,
@ -21,7 +22,6 @@ BASE_URL = "http://www.usaco.org"
HEADERS = {
"User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"
}
TIMEOUT_S = 15.0
CONNECTIONS = 4
MONTHS = [
@ -58,7 +58,9 @@ RESULTS_PAGE_RE = re.compile(
async def _fetch_text(client: httpx.AsyncClient, url: str) -> str:
r = await client.get(url, headers=HEADERS, timeout=TIMEOUT_S, follow_redirects=True)
r = await client.get(
url, headers=HEADERS, timeout=HTTP_TIMEOUT, follow_redirects=True
)
r.raise_for_status()
return r.text