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Selectively Disabling HTTP/1.0 and HTTP/1.1

Selectively Disabling HTTP/1.0 and HTTP/1.1 http { ... # Check for text-based browsers map $http_user_agent $is_text_browser { default 0; # Text-Based Browsers (not exhaustive) "~*^w3m" 1; "~*^Links" 1; "~*^ELinks" 1; "~*^lynx" 1; # Bots (not exhaustive) "~*Googlebot" 1; "~*bingbot" 1; "~*Yahoo! Slurp" 1; "~*DuckDuckBot" 1; "~*YandexBot" 1; "~*Kagibot" 1; } # Check if request is HTTP/1.X map $server_protocol $is_http1 { default 0; "HTTP/1.0" 1; "HTTP/1.1" 1; } # If Request is not text-based browser, # and is HTTP/1.X, set the http1_and_unknown variable # to 1, which is equivalent to "true" map "$is_http1:$is_text_browser" $http1_and_unknown { default 0; "1:0" 1; } ... }

Tuesday, February 3, 2026 Read
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Go Tool Trace

淺談 Go Tool Trace - 1 淺談 Go Tool Trace - 2 Go Trace 與使用者自訂追蹤分析 淺談 Go Tool Trace - 3 實際分析 Goroutine Analysis Go Tool Trace - 4 從 分析到實戰：最佳化 Goroutine 數量 trace Trace is an “event timeline”, not “sampling statistics” go tool trace: used to inspect runtime traces. Its essence is a time-ordered event stream, including: goroutine lifecycle/states: create / runnable / running / waiting / syscall scheduler (G/M/P) related events, scheduling latency blocking time distribution (net / sync / syscall) GC events, STW, heap changes (visible in the trace viewer) Use pprof to find hot spots: who burns CPU, who allocates a lot Use trace to find latency causes: why it’s stuck (scheduling? locks? network? syscalls? GC?) Quick intuition:

Tuesday, January 27, 2026 Read
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I Replaced Redis with PostgreSQL (And It's Faster)

I Replaced Redis with PostgreSQL (And It’s Faster) Before the change, Redis handled three things: Caching (70% of usage) Pub/Sub (20% of usage) Background Job Queue (10% of usage) The pain points: Two databases to backup Redis uses RAM (expensive at scale) Redis persistence is… complicated Network hop between Postgres and Redis PostgreSQL Feature 1: Caching with UNLOGGED Tables Redis await redis.set("session:abc123", JSON.stringify(sessionData), "EX", 3600); PostgreSQL CREATE UNLOGGED TABLE cache ( key TEXT PRIMARY KEY, value JSONB NOT NULL, expires_at TIMESTAMPTZ NOT NULL ); CREATE INDEX idx_cache_expires ON cache(expires_at); Insert

Monday, January 19, 2026 Read
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Taiwanese Minnan Input Method App Launched: Mobile Devices Can Now Type Taiwanese

Taiwanese Minnan Input Method App Launched: Mobile Devices Can Now Type Taiwanese MOE Taiwanese Minnan Input Method - iOS MOE Taiwanese Minnan Input Method - Android The “Taiwanese Minnan Input Method” supports both phonetic input and voice input, allowing users to convert speech into text.

Thursday, January 15, 2026 Read
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Replace Watchtower with WUD: Build a Controlled Docker Auto-Update Plan

Replace Watchtower with WUD: Build a Controlled Docker Auto-Update Plan WUD (What’s Up Docker) services: wud: image: getwud/wud:latest container_name: wud restart: unless-stopped ports: - "3000:3000" volumes: - /var/run/docker.sock:/var/run/docker.sock - ./store:/store environment: - TZ=Asia/Shanghai # Local Docker watcher - WUD_WATCHER_LOCAL_SOCKET=/var/run/docker.sock # Key: do not watch any containers by default - WUD_WATCHER_LOCAL_WATCHBYDEFAULT=false # Scan every 12 hours - WUD_WATCHER_LOCAL_CRON=0 */12 * * * # Auto update + prune old images after update - WUD_TRIGGER_DOCKER_AUTO_PRUNE=true # Equivalent to `watchtower --cleanup` Monitor only (no auto update) labels: - "wud.watch=true" Appears in the WUD UI Shows update hints Does not auto-restart Monitor + auto update (Watchtower equivalent) labels: - "wud.watch=true" - "wud.trigger.include=docker.auto"

Sunday, January 11, 2026 Read
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What Happened To WebAssembly

What Happened To WebAssembly Watlings

Sunday, January 11, 2026 Read
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How Terminals Work

How Terminals Work

Friday, January 9, 2026 Read
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Python Numbers Every Programmer Should Know

Python Numbers Every Programmer Should Know

Sunday, January 4, 2026 Read
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Why is this running?

Why is this running?

Tuesday, December 30, 2025 Read
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Expose your local web server to the internet with a public URL.

Expose your local web server to the internet with a public URL.

Saturday, December 27, 2025 Read
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Rainman Engineering Culture: Eight Interview Questions to Spot Excellence

Rainman Engineering Culture: Eight Interview Questions to Spot Excellence CI/CD tools: collaborative GitLab/GitHub, or gate-heavy Gerrit/Jenkins? Approval flow: how many boss sign-offs does a merge request (MR) need? Environment isolation: separate Dev/Test/Prod environments, and can you switch/deploy with one click? Deployment chain: from code to user-visible, how many steps? Automated or manual? Monitoring: do alerts point to root cause, or are engineers digging through logs at night? Config management: centralized with canary/gradual release, or scattered across code with manual edits? Test coverage: a reliable automated “immune system,” or treat bugs as features and let users test in production? Rollback: when production blows up, can you roll back within 5 minutes, or stay up all night with the team?

Monday, December 22, 2025 Read
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A fast and powerful log viewer and processor that converts JSON logs or logfmt logs into a clear human-readable format.

A fast and powerful log viewer and processor that converts JSON logs or logfmt logs into a clear human-readable format.

Sunday, December 14, 2025 Read