fix(handler/dns): apply readTimeout, fix async context leak, add 40 tests

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- Apply parsed readTimeout as connection read deadline (was dead code)
- Use context.WithoutCancel for async cache refresh goroutine
- Add doc comments to all exported symbols
- Add 40 tests covering metadata parsing, init, rate limiting,
  exchanger selection, host lookup, cache, bypass, async refresh,
  and concurrent request handling

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This commit is contained in:

ginuerzh

2026-05-26 20:55:55 +08:00

parent b3424b769e

commit dd76e9f685

3 changed files with 1038 additions and 5 deletions

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handler/dns/handler_test.go

+1021

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