Jan Novak
c323d879d0
Classify network failures (dns/connect/timeout/tls) with distinct exit codes 2-5. Add --timeout (default 10s) via context.WithTimeout. Add --fail for exit 6 on HTTP status >= 400. Preserve partial phase timing up to the failure point. -n sampling continues on network failures, aggregating successes and reporting fail counts. JSON extended with succeeded/failed/errors fields. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2.5 KiB
2.5 KiB
Changelog
All completed features are logged here in reverse-chronological order.
2026-07-01 00:38 — Failure handling (Go, Step 5)
- Classified network failures into
dns/connect/timeout/tlswith distinct exit codes (2–5) - Partial timing preserved up to the failure point (e.g. DNS phase shown on NXDOMAIN)
--timeoutflag (default 10s) applied viacontext.WithTimeout--failflag: HTTP status ≥ 400 → exit code 6 (curl-style)-nsampling continues on network failure; aggregates successes, reports fail count + cause- JSON output extended with
succeeded,failed,errors[]fields - Highest exit code across all URLs/failure types is used as the process exit
2026-07-01 00:08 — JSON output flag (Go, Step 4)
--jsonflag emits a JSON array with one entry per URL- Schema always uses min/avg/max shape (consistent regardless of
-n) - Phases absent from the request (e.g. TLS on HTTP) are omitted from the JSON object
- Failed URLs are excluded from JSON output and reported to stderr
- Text output unchanged and remains the default
2026-07-01 00:08 — Multiple URLs + sampling (Go, Step 3)
-n/--countflag repeats each URL N times and reports min/avg/max per phaseprobe.Summarizeaggregates a slice of Results into per-phase PhaseStats- Multi-sample output shows an aligned min/avg/max table with a header row
- Single-sample output (n=1) is unchanged from Step 2
2026-07-01 00:08 — Per-phase breakdown (Go, Step 2)
- Instrumented requests with
net/http/httptrace.ClientTrace - DNS lookup, TCP connect, TLS handshake, Server/TTFB, Transfer, Total phases
- TLS row omitted automatically for plain
http://URLs - Aligned text output with separator before Total
2026-07-01 00:08 — Simple total latency (Go, Step 1)
probe.Measureperforms an HTTP GET and records wall-clock total timemain.goprints URL, HTTP status code, and total duration for each URL- Exits with code 1 if any URL fails
- Multiple URLs accepted as positional arguments
2026-07-01 00:08 — Project scaffold (Go, Step 0)
- Created project structure:
go/,python/,docs/plans/,docs/usage/ - Initialised Go module
latprobe(go/go.mod) - Minimal
go/main.gothat prints usage and exits cleanly when no URL is given - Stub
go/internal/probe/probe.godefining theResulttype andMeasuresignature - Foundation files:
README.md,CLAUDE.md,CHANGELOG.md - Saved initial plan to
docs/plans/2026-07-01-00-08-go-latency-tool.md