The serve command runs internal/server: the API under /api (health, and
the CSRF token endpoint) and the WebSocket hub under /ws, over HTTP or TLS,
with an optional HTTP to HTTPS redirect, the PROXY protocol from trusted
sources and a graceful shutdown that closes WebSockets first. Its middleware
covers the client IP behind trusted proxies, request IDs, request logging,
panic recovery, global and API rate limits, Host and body size checks,
security response headers, compression, CSRF protection (cross-origin
checks and signed double-submit tokens) and JSON-only API bodies. Middleware
that logs takes a WithLogger option.
New server config sections: proxy, csrf, tls, headers and frontend (not
used yet), plus max_header_bytes, max_body_bytes, global and API rate limits
and HTTP read, write and idle timeouts. Every setting documents what 0 or
empty means, and internal/config/README.md is reorganised by section.
server.timeouts.read_header must be greater than 0, and a header or idle
timeout of 0 means no limit rather than the read timeout.
WebSocket upgrades are protected by the Origin check: the server's own
origin, or one of csrf.cross_origin_protection.trusted_origins, which the
hub now takes with WithTrustedOrigins.
wsserve becomes "ws serve". "ws dial" opens a WebSocket on /ws to test it:
--ping sends a ping and waits for the pong, --message sends messages and
prints the replies, --origin tests the Origin check, and with neither
--ping nor --message each line of stdin is sent until Ctrl+C.
CODE_CONVENTIONS.md sets out the conventions for Go code in this
repository: naming, layout, comments, errors, logging, configuration and
tests. .golangci.json enables the linters that check the parts that can be
checked (each limited to the rules the conventions use); the rest is
applied by hand.
Applied across the codebase:
- Naming: full-word names in application code, initialisms in one case
(BuyerID, PrintJSON, PrintYAML, ocdsGetBuyerID), no names shadowing
built-ins (min/max are minGap/maxGap), mustRaw renamed rawJSON as it
returns nil rather than panicking, and config.ConfigLevelToLogLevel
renamed LevelToLogLevel.
- Layout: lines kept to 80 characters where possible, assignments taken
out of if and for statements that don't fit, wrapped arguments all on
one line or one per line, steps separated by blank lines, no else after
a return, function and struct literals wrapped.
- Comments: doc comments on every exported name (including each section's
Map, Flatten, TypeOf, ValueOf and SetValue), section banners, British
spelling.
- Errors: a created error starts with its package name, a wrapping error
adds only what was being done, sentinels in one commented var block,
errors.Is and errors.As in place of == and type assertions, and no
err := shadowing of a named result. That fixes the mock server losing
its access log's close error.
- Logging: the fetcher passes its workers an untagged logger, so
findatender's lines are tagged with their own component rather than
with fetcher's as well; cmd/mock-fts logs "stopped" with slog.
- Configuration: util.WithTimeout (moved from the websocket package)
applies a timeout of 0 or less as no limit, used for the websocket
write and ping, TCP close and tcpserver shutdown timeouts; every setting
documents what 0 or empty means, including the rate limit rule's keys
in internal/config/README.md.
- Tests: related tests merged into table-driven ones with named cases.
Separately from CODE_CONVENTIONS.md, internal/store/README.md gains a soft
SQL style convention for the queries in internal/store/queries.go, and the
queries are reformatted to follow it.
- a source's interval must be greater than 0: a source is turned off with
enabled, not with a zero interval, so JSCSourcesSource rejects an interval of
0 or less (its validate is promoted to each source's section);
- max_message_size rejects -1: JSCServerWebSocket rejects a max_message_size
of -1 (util.ByteSizeNoLimit), as a client could then exhaust the server's
memory;
- every setting documents what 0 or empty means (zero/none, no limit or a
default).
which runs a plain TCP server for receiving websocket hub clients, with
server config, CSRF and rate limit middleware.
- internal/websocket: Hub pushing messages to WebSocket clients (ServeHTTP,
example.com/ws upgrade with optional CSRF check) and plain TCP clients (ServeTCP,
newline-delimited JSON envelopes); ping/pong keepalive, per-client message
rate limit, slow consumer handling, graceful Shutdown, debug logging of
messages sent and received
- internal/websocket/tcpserver: standalone TCP server for a hub, with accept
back-off, a per-IP connection limit (server.websocket.connection_limit) and
graceful shutdown
- internal/cli/wsserve: `wsserve` command running the TCP server, with
--listen/--host/--port overrides
- internal/middleware: keyed token bucket rate limiter, real client IP from
trusted proxies
- internal/httpx: RFC 9457 problem responses, request IDs in context
- internal/config: server section (host, port, shutdown timeout, rate limiter
idle TTL, websocket); util.ByteSize settings (e.g. "32KiB"); lists of
sections as single keys; empty lists stored as nil; isExplicitlySet for
printLoadedConfig; JobSearchConfigSource renamed to JSCSourcesSource;
TestSections checks every section's methods
- internal/util: ByteSize, parsed and formatted with go-humanize
bwilliams