127 lines
5.1 KiB
YAML
127 lines
5.1 KiB
YAML
# services/communication/guest-register-configmap.yaml
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apiVersion: v1
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kind: ConfigMap
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metadata:
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name: matrix-guest-register
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data:
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server.py: |
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import json
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import os
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from http.server import BaseHTTPRequestHandler, HTTPServer
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from urllib import error, parse, request
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SYNAPSE_BASE = os.environ.get("SYNAPSE_BASE", "http://othrys-synapse-matrix-synapse:8008").rstrip("/")
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GUEST_REGISTER_SHARED_SECRET = os.environ["GUEST_REGISTER_SHARED_SECRET"]
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GUEST_REGISTER_HEADER = os.environ.get("GUEST_REGISTER_HEADER", "x-guest-register-secret")
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GUEST_REGISTER_PATH = os.environ.get("GUEST_REGISTER_PATH", "/_matrix/client/v3/_guest_register")
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RATE_WINDOW_SEC = int(os.environ.get("RATE_WINDOW_SEC", "60"))
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RATE_MAX = int(os.environ.get("RATE_MAX", "30"))
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_rate = {} # ip -> [window_start, count]
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def _json(method, url, *, headers=None, body=None, timeout=20):
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hdrs = {"Content-Type": "application/json"}
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if headers:
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hdrs.update(headers)
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data = None
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if body is not None:
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data = json.dumps(body).encode()
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req = request.Request(url, data=data, headers=hdrs, method=method)
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try:
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with request.urlopen(req, timeout=timeout) as resp:
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raw = resp.read()
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payload = json.loads(raw.decode()) if raw else {}
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return resp.status, payload
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except error.HTTPError as e:
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raw = e.read()
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try:
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payload = json.loads(raw.decode()) if raw else {}
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except Exception:
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payload = {}
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return e.code, payload
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def _rate_check(ip, now):
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win, cnt = _rate.get(ip, (now, 0))
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if now - win > RATE_WINDOW_SEC:
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_rate[ip] = (now, 1)
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return True
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if cnt >= RATE_MAX:
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return False
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_rate[ip] = (win, cnt + 1)
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return True
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class Handler(BaseHTTPRequestHandler):
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server_version = "matrix-guest-register"
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def _send_json(self, code, payload):
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body = json.dumps(payload).encode()
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self.send_response(code)
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self.send_header("Content-Type", "application/json")
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self.send_header("Access-Control-Allow-Origin", "*")
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self.send_header("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
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self.send_header("Access-Control-Allow-Headers", "Content-Type, Authorization, X-Requested-With")
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self.send_header("Content-Length", str(len(body)))
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self.end_headers()
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self.wfile.write(body)
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def do_OPTIONS(self): # noqa: N802
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self.send_response(204)
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self.send_header("Access-Control-Allow-Origin", "*")
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self.send_header("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
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self.send_header("Access-Control-Allow-Headers", "Content-Type, Authorization, X-Requested-With")
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self.end_headers()
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def do_GET(self): # noqa: N802
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if self.path in ("/healthz", "/"):
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return self._send_json(200, {"ok": True})
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return self._send_json(404, {"errcode": "M_NOT_FOUND", "error": "not_found"})
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def do_POST(self): # noqa: N802
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parsed = parse.urlparse(self.path)
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if parsed.path not in ("/_matrix/client/v3/register", "/_matrix/client/r0/register"):
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return self._send_json(404, {"errcode": "M_NOT_FOUND", "error": "not_found"})
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qs = parse.parse_qs(parsed.query)
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kind = (qs.get("kind") or ["user"])[0]
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if kind != "guest":
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return self._send_json(
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403,
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{
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"errcode": "M_FORBIDDEN",
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"error": "Registration is disabled; use https://bstein.dev/request-access for accounts.",
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},
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)
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xfwd = self.headers.get("x-forwarded-for", "")
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ip = (xfwd.split(",")[0].strip() if xfwd else "") or self.client_address[0]
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now = __import__("time").time()
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if not _rate_check(ip, now):
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return self._send_json(429, {"errcode": "M_LIMIT_EXCEEDED", "error": "rate_limited"})
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length = int(self.headers.get("content-length", "0") or "0")
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raw = self.rfile.read(length) if length else b"{}"
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try:
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body = json.loads(raw.decode()) if raw else {}
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if not isinstance(body, dict):
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body = {}
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except Exception:
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body = {}
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status, payload = _json(
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"POST",
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f"{SYNAPSE_BASE}{GUEST_REGISTER_PATH}",
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headers={GUEST_REGISTER_HEADER: GUEST_REGISTER_SHARED_SECRET},
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body=body,
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timeout=20,
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)
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if "refresh_token" in payload:
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payload.pop("refresh_token", None)
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return self._send_json(status, payload)
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def main():
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port = int(os.environ.get("PORT", "8080"))
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HTTPServer(("0.0.0.0", port), Handler).serve_forever()
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if __name__ == "__main__":
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main()
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