Aleksey Shakhmatov
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Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
31 lines
1.3 KiB
Markdown
31 lines
1.3 KiB
Markdown
# CLAUDE.md — httpx
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## Commands
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```bash
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go build ./... # compile
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go test ./... # all tests
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go test -race ./... # tests with race detector
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go test -v -run TestName ./package/ # single test
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go vet ./... # static analysis
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```
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## Architecture
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- **Module**: `git.codelab.vc/pkg/httpx`, Go 1.24, zero external dependencies
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- **Core pattern**: middleware is `func(http.RoundTripper) http.RoundTripper`
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- **Chain assembly order** (client.go): Logging → User MW → Retry → CB → Balancer → Transport
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- Retry wraps CB+Balancer so each attempt can hit a different endpoint
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- **Circuit breaker** is per-host (`sync.Map` of host → Breaker)
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- **Sentinel errors**: canonical values live in sub-packages, root package re-exports as aliases
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- **balancer.Transport** returns `(Middleware, *Closer)` — Closer must be tracked for health checker shutdown
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- **Client.Close()** stops the health checker goroutine
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## Conventions
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- Functional options for all configuration
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- Test helpers: `mockTransport(fn)` wrapping `middleware.RoundTripperFunc`
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- No external test frameworks — stdlib only
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- Thread safety required (`sync.Mutex`/`atomic`)
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- `internal/clock` for deterministic time testing
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