Subscriptions and message routing now go through account-specific SubLists
instead of a single global SubList. Clients in different accounts cannot
see each other's messages. When no account is specified (or auth is not
configured), all clients share the global $G account.
Wire AuthService into NatsServer and NatsClient to enforce authentication
on incoming connections. The server builds an AuthService from NatsOptions,
sets auth_required in ServerInfo, and generates per-client nonces when
NKey auth is configured. NatsClient validates credentials in ProcessConnect,
enforces publish/subscribe permissions, and implements an auth timeout that
closes connections that don't send CONNECT in time. Existing tests without
auth continue to work since AuthService.IsAuthRequired is false by default.
Move max payload validation from the parser to ProcessPubAsync so the
server sends -ERR 'Maximum Payload Violation' and closes the connection
(matching Go reference client.go:2442). In pedantic mode, reject PUB
with wildcard subjects via -ERR 'Invalid Publish Subject' (client.go:2869).
Add disposed guard to SubList.Remove to prevent crash during shutdown.
Covers /varz, /connz endpoints via Kestrel Minimal APIs,
full TLS support with four modes (none/required/first/mixed),
cert pinning, rate limiting, and testing strategy.
Four tasks: -ERR infrastructure, MaxConnections enforcement,
pedantic subject validation + max payload on PUB, PING keepalive.
Full TDD steps with exact code and commands.
Replace empty catch blocks with meaningful log statements in NatsServer,
NatsClient, and Program. Add WaitForReadyAsync() to NatsServer for
deterministic server startup. Replace Task.Delay/Thread.Sleep in tests
with PING/PONG protocol flush and SubscribeCoreAsync for reliable
subscription synchronization.
Remove template UnitTest1.cs placeholder. Add actual project structure,
run commands for the NATS server host, and update test command examples
to reference the real project paths.
Validates the server against the official NATS .NET client library with
tests for basic pub/sub, wildcard (* and >) matching, fan-out to
multiple subscribers, and PING/PONG keepalive. All 5 tests pass without
requiring any server changes.
Add NatsParser that reads NATS protocol commands from
ReadOnlySequence<byte>. Identifies commands by first 2 bytes using
case-insensitive bit masking. Handles PUB/HPUB payload reading with
stateful _awaitingPayload for split-packet scenarios. Uses Span<Range>
for zero-allocation argument splitting and ParseSize for ASCII decimal
parsing. Includes CommandType enum, ParsedCommand struct, and
ProtocolViolationException.
14 tests covering PING, PONG, CONNECT, INFO, SUB (with/without queue),
UNSUB (with/without max), PUB (with/without reply, zero payload),
HPUB, multiple commands, and case insensitivity.
10 tasks from scaffolding through integration tests, each with
TDD steps, exact file paths, and complete code. Bottom-up order:
SubList → Parser → Client → Server → Integration.
