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#!/usr/bin/env python3
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"""Publish authoritative realtime presence with automatic rollback."""
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import base64
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import fcntl
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import hashlib
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import hmac
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import json
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import os
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import pwd
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import shutil
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import socket
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import ssl
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import sys
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import time
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import urllib.error
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import urllib.request
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import zipfile
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from pathlib import Path
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sys.path.insert(0, '/www/server/xingyu-im/ops')
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from baota_publish_test_users import BT, DOMAIN, WEB, database, digest, env_values, extract, fetch, health, query, restart
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OLD = 'e8e071ec7006a32303f7cd654cddad8afda22ecb4fe83464305a9d3aef4d7280'
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BASE = Path('/www/server/xingyu-im/releases/nearby-post-media-20260901-115131')
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ALLOWED = {
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'backend/internal/app/auth.go',
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'backend/internal/app/public_auth.go',
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'backend/internal/app/im.go',
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'backend/internal/app/social.go',
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'backend/internal/app/presence_test.go',
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'backend/internal/testusers/seed.go',
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}
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def source_hashes(archive):
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with zipfile.ZipFile(str(archive)) as package:
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result = {}
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for item in package.infolist():
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if item.is_dir():
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continue
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name = item.filename.replace('\\', '/')
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assert name not in result and not name.startswith('/') and '..' not in Path(name).parts
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result[name] = hashlib.sha256(package.read(item)).hexdigest()
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return result
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def running(expected):
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pids = []
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for proc in Path('/proc').iterdir():
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if not proc.name.isdigit():
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continue
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try:
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if os.readlink(str(proc / 'exe')) == str(BT / 'xingyu-api'):
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assert digest(proc / 'exe') == expected
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pids.append(int(proc.name))
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except (FileNotFoundError, PermissionError):
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pass
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assert len(pids) == 1, 'expected one running project executable'
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return pids
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def replace(source, stamp):
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temporary = BT / ('xingyu-api.presence-' + stamp)
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assert not temporary.exists()
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shutil.copy2(str(source), str(temporary))
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www = pwd.getpwnam('www')
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os.chown(str(temporary), www.pw_uid, www.pw_gid)
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os.chmod(str(temporary), 0o750)
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os.replace(str(temporary), str(BT / 'xingyu-api'))
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def encode_json(value):
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raw = json.dumps(value, separators=(',', ':'), ensure_ascii=False).encode()
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return base64.urlsafe_b64encode(raw).rstrip(b'=').decode()
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def user_token(secret, user_id, nickname, version):
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now = int(time.time())
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header = encode_json({'alg': 'HS256', 'typ': 'JWT'})
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payload = encode_json({'role': 'user', 'name': nickname, 'ver': version, 'sub': str(user_id), 'iat': now, 'exp': now + 300})
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signing_input = (header + '.' + payload).encode()
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signature = base64.urlsafe_b64encode(hmac.new(secret.encode(), signing_input, hashlib.sha256).digest()).rstrip(b'=').decode()
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return header + '.' + payload + '.' + signature
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def receive_exact(stream, count):
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output = b''
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while len(output) < count:
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chunk = stream.recv(count - len(output))
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if not chunk:
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raise RuntimeError('WebSocket closed before AUTH_ACK')
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output += chunk
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return output
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def first_websocket_command(stream, initial=b''):
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class Buffered:
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def __init__(self, buffered, source):
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self.buffered, self.source = buffered, source
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def recv(self, count):
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if self.buffered:
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chunk, self.buffered = self.buffered[:count], self.buffered[count:]
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return chunk
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return self.source.recv(count)
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reader = Buffered(initial, stream)
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first, second = receive_exact(reader, 2)
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size = second & 0x7f
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if size == 126:
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size = int.from_bytes(receive_exact(reader, 2), 'big')
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elif size == 127:
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size = int.from_bytes(receive_exact(reader, 8), 'big')
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return json.loads(receive_exact(reader, size)).get('command')
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def profile_online(user_id, token):
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request = urllib.request.Request(
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DOMAIN + '/api/v1/users/' + str(user_id),
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headers={'Authorization': 'Bearer ' + token, 'Accept': 'application/json'},
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)
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with urllib.request.urlopen(request, timeout=20) as response:
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assert response.status == 200
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return bool(json.loads(response.read())['data']['online'])
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def verify_presence(conn, values):
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selected = query(conn, """SELECT target.id,target_profile.nickname,target_security.token_version,
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viewer.id,viewer_profile.nickname,viewer_security.token_version
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FROM users target JOIN user_profiles target_profile ON target_profile.user_id=target.id
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JOIN user_security_controls target_security ON target_security.user_id=target.id
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JOIN user_privacy_settings target_privacy ON target_privacy.user_id=target.id
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JOIN users viewer ON viewer.id<>target.id AND viewer.status=1 AND viewer.deleted_at IS NULL
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JOIN user_profiles viewer_profile ON viewer_profile.user_id=viewer.id
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JOIN user_security_controls viewer_security ON viewer_security.user_id=viewer.id
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WHERE target.status=1 AND target.deleted_at IS NULL AND target.is_test=1
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AND target_privacy.online_visible=1
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AND NOT EXISTS(SELECT 1 FROM user_blocks block WHERE
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(block.user_id=viewer.id AND block.blocked_user_id=target.id) OR
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(block.user_id=target.id AND block.blocked_user_id=viewer.id))
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ORDER BY target.id,viewer.id LIMIT 1""")
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assert selected, 'no isolated presence verification users available'
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target_id, target_name, target_version, viewer_id, viewer_name, viewer_version = selected[0]
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target_token = user_token(values['IM_JWT_SECRET'], target_id, target_name, target_version)
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viewer_token = user_token(values['IM_JWT_SECRET'], viewer_id, viewer_name, viewer_version)
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key = base64.b64encode(os.urandom(16)).decode()
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request = ('\r\n'.join([
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'GET /ws HTTP/1.1', 'Host: im.bchongw.com', 'Upgrade: websocket',
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'Connection: Upgrade', 'Sec-WebSocket-Version: 13',
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'Sec-WebSocket-Key: ' + key, 'Origin: https://im.bchongw.com',
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'Sec-WebSocket-Protocol: xingyu.jwt.' + target_token,
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]) + '\r\n\r\n').encode()
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context = ssl.create_default_context()
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with socket.create_connection(('im.bchongw.com', 443), timeout=10) as raw:
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with context.wrap_socket(raw, server_hostname='im.bchongw.com') as stream:
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stream.settimeout(10)
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stream.sendall(request)
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response = b''
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while b'\r\n\r\n' not in response:
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response += stream.recv(4096)
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head, remainder = response.split(b'\r\n\r\n', 1)
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assert b' 101 ' in head.split(b'\r\n', 1)[0]
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assert first_websocket_command(stream, remainder) == 'AUTH_ACK'
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assert profile_online(target_id, viewer_token), 'connected user was reported offline'
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disconnected = False
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for _ in range(30):
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if not profile_online(target_id, viewer_token):
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disconnected = True
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break
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time.sleep(0.1)
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assert disconnected, 'closed final socket was still reported online'
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return {'targetUserId': target_id, 'viewerUserId': viewer_id, 'connected': True, 'disconnected': True}
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def publish(archive, expected):
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assert os.geteuid() == 0
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archive = Path(archive).resolve()
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assert archive.parent == Path('/tmp') and digest(archive) == expected
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lock = open('/www/server/xingyu-im/ops/application-release.lock', 'a')
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fcntl.flock(lock, fcntl.LOCK_EX | fcntl.LOCK_NB)
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assert digest(BT / 'xingyu-api') == OLD, 'production changed; re-audit required'
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running(OLD)
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health()
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stamp = time.strftime('%Y%m%d-%H%M%S')
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stage = Path('/www/server/xingyu-im/releases/presence-' + stamp)
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extract(archive, stage)
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os.chmod(str(stage), 0o700)
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old_source = source_hashes(BASE / 'backend-source.zip')
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new_source = source_hashes(stage / 'backend-source.zip')
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changed = {name for name in set(old_source) | set(new_source) if old_source.get(name) != new_source.get(name)}
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assert changed == ALLOWED, 'unreviewed source changes: ' + repr(changed)
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new_hash = digest(stage / 'xingyu-api')
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assert (stage / 'xingyu-api').read_bytes()[:4] == b'\x7fELF' and new_hash != OLD
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manifest = json.loads((stage / 'manifest.json').read_text())
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for name in ['xingyu-api', 'backend-source.zip']:
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assert digest(stage / name) == manifest['files'][name]
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values = env_values()
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conn, _ = database(values)
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try:
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before_migrations = dict(query(conn, 'SELECT version,checksum FROM schema_migrations'))
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for name, sha in before_migrations.items():
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assert new_source['backend/migrations/' + name] == sha
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assert len(before_migrations) == len([name for name in new_source if name.startswith('backend/migrations/')])
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frontend = {name: str((WEB / name).resolve()) for name in ['admin', 'app']}
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backup = Path('/www/backup/xingyu-presence-' + stamp)
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backup.mkdir(mode=0o700)
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shutil.copy2(str(BT / 'xingyu-api'), str(backup / 'xingyu-api-original'))
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privacy_before = query(conn, """SELECT privacy.user_id,privacy.online_visible
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FROM user_privacy_settings privacy JOIN users user ON user.id=privacy.user_id
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WHERE user.is_test=1 AND user.deleted_at IS NULL ORDER BY privacy.user_id""")
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assert privacy_before, 'expected existing demonstration accounts'
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privacy_backup = backup / 'privacy-before.json'
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privacy_backup.write_text(json.dumps(privacy_before))
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os.chmod(str(privacy_backup), 0o600)
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state = {
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'backup': str(backup), 'stage': str(stage), 'previousBackendSha256': OLD,
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'backendSha256': new_hash, 'archiveSha256': expected,
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'changedSourceFiles': sorted(changed), 'frontendUnchanged': frontend,
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'databaseMigrationsApplied': [], 'businessDataWrites': True,
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'privacyScope': 'existing is_test=1 accounts only',
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}
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(backup / 'before.json').write_text(json.dumps(state, indent=2))
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print('BACKUP_VERIFIED=' + str(backup), flush=True)
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changed_binary = False
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privacy_changed = False
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try:
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replace(stage / 'xingyu-api', stamp)
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changed_binary = True
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restart()
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state['runningPids'] = running(new_hash)
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assert digest(BT / 'xingyu-api') == new_hash
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assert dict(query(conn, 'SELECT version,checksum FROM schema_migrations')) == before_migrations
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assert {name: str((WEB / name).resolve()) for name in frontend} == frontend
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with conn.cursor() as cursor:
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cursor.execute("""UPDATE user_privacy_settings privacy JOIN users user ON user.id=privacy.user_id
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SET privacy.online_visible=1 WHERE user.is_test=1 AND user.deleted_at IS NULL""")
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state['demonstrationPrivacyRowsMatched'] = cursor.rowcount
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privacy_changed = True
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for path in ['/api/v1/nearby/users', '/admin/v1/users', '/ws']:
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try:
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fetch(path)
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except urllib.error.HTTPError as error:
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assert error.code == 401
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else:
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raise RuntimeError('private endpoint became public')
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state['presence'] = verify_presence(conn, values)
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state['healthAndAuthChecks'] = True
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(backup / 'result.json').write_text(json.dumps(state, indent=2))
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print(json.dumps(state), flush=True)
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except Exception:
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if privacy_changed:
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with conn.cursor() as cursor:
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cursor.executemany('UPDATE user_privacy_settings SET online_visible=%s WHERE user_id=%s',
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[(online, user_id) for user_id, online in privacy_before])
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if changed_binary:
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replace(backup / 'xingyu-api-original', stamp + '-rollback')
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restart()
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running(OLD)
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(backup / 'rolled-back.txt').write_text('Original binary restored. No database restore performed.\n')
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raise
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finally:
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conn.close()
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if __name__ == '__main__':
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publish(*sys.argv[1:])
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