Add Reddit rate limiting, OAuth2 auth, and response caching#1
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Add Reddit rate limiting, OAuth2 auth, and response caching#1
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Reddit's unauthenticated API allows ~10 req/min, which concurrent workers easily exceed. This adds four layers of protection: - OAuth2 "script" app auth via env vars for 60 req/min (6x improvement) - Token-bucket rate limiter (8/min unauth, 55/min auth) with dynamic adjustment based on X-Ratelimit headers from Reddit - Exponential backoff retry (up to 3x) on 429s with Retry-After support - In-memory TTL response cache (10 min) to avoid redundant fetches - IP-ban detection for Retry-After:0 with no rate-limit headers Falls back to unauthenticated behavior when env vars are absent. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
REDDIT_CLIENT_ID,REDDIT_CLIENT_SECRET,REDDIT_USERNAME,REDDIT_PASSWORDfrom env vars to useoauth.reddit.comwith 60 req/min limits. Falls back to unauthenticated access when absent.golang.org/x/time/rate) at 8 req/min (unauth) or 55 req/min (auth), dynamically adjusted from Reddit'sX-Ratelimit-*headers.Retry-Afterheader or exponential backoff with jitter. Detects IP-level blocks (Retry-After: 0 with no rate-limit headers) and fails fast with a helpful message.Test plan
go build ./...passesgo vet ./internal/search/...passesgo test ./internal/search/ -short -v— all 9 tests passREDDIT_CLIENT_IDetc. — confirm OAuth token obtained andoauth.reddit.comusedhiveminer run— confirm no 429 errors with rate limiter active🤖 Generated with Claude Code