Adds LogOverrides property to NatsOptions and a --log_level_override=namespace=level CLI flag that wires Serilog MinimumLevel.Override entries so operators can tune verbosity per .NET namespace without changing the global log level.
Implement NatsJwt static class with Ed25519 signature verification,
base64url decoding, and JWT parsing. Add UserClaims and AccountClaims
with all NATS-specific fields (permissions, bearer tokens, limits,
signing keys, revocations). Includes 44 tests covering decode, verify,
nonce verification, and full round-trip signing with real NKey keypairs.
Port Go server/subject_transform.go to .NET. Implements a compiled
transform engine that parses source patterns with wildcards and
destination templates with function tokens at Create() time, then
evaluates them efficiently at Apply() time without runtime regex.
Supports all 9 transform functions: wildcard/$N, partition (FNV-1a),
split, splitFromLeft, splitFromRight, sliceFromLeft, sliceFromRight,
left, and right. Used for stream mirroring, account imports/exports,
and subject routing.
Load the server TLS certificate from disk during each /varz request to
read its NotAfter date and expose it as tls_cert_not_after. Also wire
OcspPeerVerify from NatsOptions into the tls_ocsp_peer_verify field.
Both fields were already declared in the Varz model but left unpopulated.
Adds Microsoft.Extensions.Hosting.WindowsServices package and a --service
CLI flag to Program.cs that logs service mode activation, enabling future
Windows Service lifecycle management.
Introduces NATS.Server.Tls.OcspMode (Auto/Always/Must/Never matching
Go ocsp.go constants) and OcspConfig with Mode and OverrideUrls. Adds
OcspConfig? and OcspPeerVerify to NatsOptions for stapling configuration
and peer certificate revocation checking. Covered by 12 new unit tests.
Adds the IAccountResolver interface (FetchAsync, StoreAsync, IsReadOnly)
and a MemAccountResolver backed by ConcurrentDictionary for in-memory
JWT storage in tests and simple operator deployments.
Reference: golang/nats-server/server/accounts.go:4035+
Avoids re-serializing the same ServerInfo JSON on every new connection. The
cache is rebuilt when the ephemeral port is resolved. Connections that carry a
per-connection nonce (NKey auth) continue to serialize individually so the nonce
is included correctly.
Reconcile close reason tracking: feature branch's MarkClosed() and
ShouldSkipFlush/FlushAndCloseAsync now use main's ClientClosedReason
enum. ClosedState enum retained for forward compatibility.
Reject connections that send no_responders:true without headers:true,
since the 503 HMSG response requires header support. Add three tests:
connection rejection, acceptance with headers, and 503 delivery flow.
When a client sends CONNECT {"verbose":true}, the server now responds
with +OK\r\n after successfully processing CONNECT, PING, SUB, UNSUB,
and PUB/HPUB commands, matching the Go NATS server behavior.
Accumulate InMsgs/InBytes locally per ReadAsync cycle and flush once,
reducing from 4 Interlocked operations per published message to 2 per
read cycle. This matches the Go server's approach of batching stats.
When a PUB with a reply-to subject has no matching subscribers and the
sender opted into no_responders, send a 503 HMSG back on the reply
subject so request-reply callers can fail fast instead of timing out.
