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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/codechef.py
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@ -9,6 +9,7 @@ import httpx
from curl_cffi import requests as curl_requests
from .base import BaseScraper, extract_precision
from .timeouts import HTTP_TIMEOUT
from .models import (
ContestListResult,
ContestSummary,
@ -26,7 +27,6 @@ PROBLEM_URL = "https://www.codechef.com/problems/{problem_id}"
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 = 8
MEMORY_LIMIT_RE = re.compile(
r"Memory\s+[Ll]imit.*?([0-9.]+)\s*(MB|GB)", re.IGNORECASE | re.DOTALL
@ -34,7 +34,7 @@ MEMORY_LIMIT_RE = re.compile(
async def fetch_json(client: httpx.AsyncClient, path: str) -> dict:
r = await client.get(BASE_URL + path, headers=HEADERS, timeout=TIMEOUT_S)
r = await client.get(BASE_URL + path, headers=HEADERS, timeout=HTTP_TIMEOUT)
r.raise_for_status()
return r.json()
@ -51,7 +51,7 @@ def _extract_memory_limit(html: str) -> float:
def _fetch_html_sync(url: str) -> str:
response = curl_requests.get(url, impersonate="chrome", timeout=TIMEOUT_S)
response = curl_requests.get(url, impersonate="chrome", timeout=HTTP_TIMEOUT)
response.raise_for_status()
return response.text