adminandClaude
b97658e067
webhook.py: HMAC-signed receiver (X-Gitea-Signature), validates ref==main, one-concurrent-deploy lock, no request data reaches shell. deploy-webhook.sh: installs llm-bench-webhook systemd service (runs as aygea, in docker group), generates + stores secret in .webhook.secret. deploy.sh: port read from compose (now 31415). Installed on mewtwo: listening 0.0.0.0:41798, enabled for boot. Gitea webhook target: http://10.0.0.22:41798/hook Co-Authored-By: Claude <noreply@anthropic.com>
111 lines
4.3 KiB
Python
111 lines
4.3 KiB
Python
#!/usr/bin/env python3
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"""
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Gitea push webhook receiver for the benchmark dashboard.
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- Listens on 0.0.0.0:PORT (obscure port; Gitea calls http://10.0.0.22:PORT/hook)
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- Validates the shared secret via the X-Gitea-Signature header (HMAC-SHA256 of the body)
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- On a valid push to `main`, runs: git fetch + reset to origin/main + ./deploy.sh up
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- One concurrent deploy at a time (a lock prevents overlapping rebuilds)
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Security notes:
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- No request data reaches the shell. The only string passed to the shell is a
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hardcoded script (cd to this file's own dir, git fetch/reset, deploy.sh up).
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- The pushed ref is validated against a fixed constant (refs/heads/main) before deploy.
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Run via the systemd unit llm-bench-webhook.service (see deploy-webhook.sh).
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"""
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import asyncio, hmac, hashlib, os, json, logging
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from http import HTTPStatus
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HERE = os.path.dirname(os.path.abspath(__file__))
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PORT = int(os.environ.get("WEBHOOK_PORT", "41798"))
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SECRET = os.environ.get("WEBHOOK_SECRET", "").encode()
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REF_FILTER = os.environ.get("WEBHOOK_REF", "refs/heads/main")
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MAX_BODY = 2 * 1024 * 1024 # 2 MB cap
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logging.basicConfig(level=logging.INFO, format="%(asctime)s %(levelname)s %(message)s")
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log = logging.getLogger("webhook")
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_deploy_lock = asyncio.Lock()
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# Hardcoded deploy script — NO request data interpolated into it.
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_DEPLOY_CMD = "cd " + HERE + " && git fetch origin && git reset --hard origin/main && ./deploy.sh up"
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def verify(signature_hex, body: bytes) -> bool:
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if not SECRET:
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log.warning("WEBHOOK_SECRET not set — accepting WITHOUT signature check (dev only)")
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return True
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if not signature_hex:
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return False
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mac = hmac.new(SECRET, body, hashlib.sha256).hexdigest()
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return hmac.compare_digest(mac, signature_hex)
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async def redeploy():
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if _deploy_lock.locked():
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log.info("deploy already running, skipping")
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return
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async with _deploy_lock:
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log.info("starting redeploy")
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proc = await asyncio.create_subprocess_exec(
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"bash", "-lc", _DEPLOY_CMD,
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stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.STDOUT,
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)
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out, _ = await proc.communicate()
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log.info("redeploy exit=%s\n%s", proc.returncode, (out or b"").decode(errors="replace"))
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async def handle(reader, writer):
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try:
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req = await reader.readuntil(b"\r\n\r\n")
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except Exception:
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writer.close(); return
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try:
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head, _, body_start = req.partition(b"\r\n\r\n")
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lines = head.decode("latin1").split("\r\n")
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method, path, _ = lines[0].split(" ", 2)
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headers = {}
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for ln in lines[1:]:
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if ":" in ln:
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k, v = ln.split(":", 1)
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headers[k.strip().lower()] = v.strip()
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cl = int(headers.get("content-length", "0") or 0)
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body = body_start
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while len(body) < cl and len(body) < MAX_BODY:
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chunk = await reader.read(min(65536, cl - len(body)))
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if not chunk:
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break
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body += chunk
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if path.split("?")[0] not in ("/hook", "/webhook"):
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writer.write(b"HTTP/1.1 404 Not Found\r\nContent-Length: 0\r\n\r\n"); await writer.drain(); return
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if method != "POST":
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writer.write(b"HTTP/1.1 405 Method Not Allowed\r\nContent-Length: 0\r\n\r\n"); await writer.drain(); return
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if not verify(headers.get("x-gitea-signature", ""), body):
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log.warning("bad signature from %s", writer.get_extra_info("peername"))
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writer.write(b"HTTP/1.1 403 Forbidden\r\nContent-Length: 0\r\n\r\n"); await writer.drain(); return
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try:
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ref = json.loads(body).get("ref", "") if body else ""
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except Exception:
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ref = ""
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if ref and ref != REF_FILTER:
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writer.write(b'HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nContent-Length: 17\r\n\r\nignored: wrong ref')
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await writer.drain(); return
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asyncio.create_task(redeploy())
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writer.write(b'HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nContent-Length: 12\r\n\r\ndeploying...\n')
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await writer.drain()
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finally:
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writer.close()
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async def main():
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server = await asyncio.start_server(handle, "0.0.0.0", PORT)
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log.info("webhook receiver listening on 0.0.0.0:%d (filter=%s)", PORT, REF_FILTER)
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async with server:
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await server.serve_forever()
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if __name__ == "__main__":
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asyncio.run(main())
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