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Add streaming brotli compression and hot-reloadable config (livevue.toml)

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Key changes:

- **src/config.rs** – `LiveVueConfig` (server host/port, brotli quality +
  window size), loaded from `livevue.toml`. A notify-based file watcher
  reloads the config on any file change; a SIGHUP handler does the same on
  demand. Falls back to compiled-in defaults when the file is absent.

- **src/brotli_layer.rs** – `BrotliBody`, a custom `http_body::Body` wrapper
  that streams brotli-compressed data through a single persistent
  `brotli::CompressorWriter`. The encoder survives across SSE event flushes,
  so its sliding window accumulates context from all prior events —
  progressively better compression as the stream grows. Both quality (0–11)
  and window size (lgwin 10–24, i.e. 1 KB – 16 MB) are taken from config.
  `brotli_compression` is an axum `from_fn_with_state` middleware that
  activates only when the client sends `Accept-Encoding: br`.

- **src/server.rs** – `AppState` gains a `config: SharedConfig` field.
  `AppState::new` takes the config; `AppState::new_default` is a zero-config
  convenience constructor.

- **livevue.toml** – documented example config with inline comments
  explaining each field and the brotli window-size tradeoff table.

- **examples/todo** – loads config via `load_and_watch_config`, derives the
  bind address from `config.server`, and applies `brotli_compression` as a
  router layer.

https://claude.ai/code/session_01UnQQkkwts64FPUsSzFfdQb
This commit is contained in:
Claude
2026-03-12 07:06:10 +00:00
parent a09ac32bef
commit 6d91fd9c36
9 changed files with 886 additions and 23 deletions
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Cargo.lock
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+263 -9
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@@ -11,6 +11,21 @@ dependencies = [
"memchr",
]
[[package]]
name = "alloc-no-stdlib"
version = "2.0.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "cc7bb162ec39d46ab1ca8c77bf72e890535becd1751bb45f64c597edb4c8c6b3"
[[package]]
name = "alloc-stdlib"
version = "0.2.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
"alloc-no-stdlib",
]
[[package]]
name = "allocator-api2"
version = "0.2.21"
@@ -143,6 +158,12 @@ version = "1.8.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2af50177e190e07a26ab74f8b1efbfe2ef87da2116221318cb1c2e82baf7de06"
[[package]]
name = "bitflags"
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[[package]]
name = "bitflags"
version = "2.11.0"
@@ -161,6 +182,27 @@ dependencies = [
"generic-array",
]
[[package]]
name = "brotli"
version = "6.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "74f7971dbd9326d58187408ab83117d8ac1bb9c17b085fdacd1cf2f598719b6b"
dependencies = [
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"alloc-stdlib",
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]
[[package]]
name = "brotli-decompressor"
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source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a334ef7c9e23abf0ce748e8cd309037da93e606ad52eb372e4ce327a0dcfbdfd"
dependencies = [
"alloc-no-stdlib",
"alloc-stdlib",
]
[[package]]
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version = "3.20.2"
@@ -253,6 +295,15 @@ version = "2.4.0"
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dependencies = [
"crossbeam-utils",
]
[[package]]
name = "crossbeam-queue"
version = "0.3.12"
@@ -385,6 +436,17 @@ version = "0.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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dependencies = [
"cfg-if",
"libc",
"libredox",
]
[[package]]
name = "find-msvc-tools"
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@@ -417,6 +479,15 @@ dependencies = [
"percent-encoding",
]
[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
"libc",
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[[package]]
name = "futures"
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@@ -858,6 +929,26 @@ dependencies = [
"serde_core",
]
[[package]]
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version = "0.9.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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[[package]]
name = "itoa"
version = "1.0.17"
@@ -874,6 +965,26 @@ dependencies = [
"wasm-bindgen",
]
[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"libc",
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[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
"bitflags 1.3.2",
"libc",
]
[[package]]
name = "lazy_static"
version = "1.5.0"
@@ -907,7 +1018,7 @@ version = "0.1.14"
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checksum = "1744e39d1d6a9948f4f388969627434e31128196de472883b39f148769bfe30a"
dependencies = [
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"bitflags 2.11.0",
"libc",
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"redox_syscall 0.7.3",
@@ -936,11 +1047,15 @@ version = "0.1.0"
dependencies = [
"anyhow",
"axum",
"brotli",
"bytes",
"chrono",
"dashmap",
"futures",
"http-body",
"maud",
"notify",
"pin-project",
"postgres-protocol",
"serde",
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@@ -948,6 +1063,7 @@ dependencies = [
"tokio",
"tokio-postgres",
"tokio-stream",
"toml",
"tracing",
"tracing-subscriber",
"uuid",
@@ -1029,6 +1145,18 @@ version = "0.3.17"
source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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dependencies = [
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]
[[package]]
name = "mio"
version = "1.1.1"
@@ -1040,6 +1168,25 @@ dependencies = [
"windows-sys 0.61.2",
]
[[package]]
name = "notify"
version = "6.1.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"walkdir",
"windows-sys 0.48.0",
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[[package]]
name = "nu-ansi-term"
version = "0.50.3"
@@ -1101,7 +1248,7 @@ version = "0.3.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2a180dd8642fa45cdb7dd721cd4c11b1cadd4929ce112ebd8b9f5803cc79d536"
dependencies = [
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"bitflags 2.11.0",
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[[package]]
@@ -1182,6 +1329,26 @@ dependencies = [
"siphasher",
]
[[package]]
name = "pin-project"
version = "1.1.11"
source = "registry+https://github.com/rust-lang/crates.io-index"
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@@ -1411,7 +1578,7 @@ version = "0.7.3"
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@@ -1463,6 +1630,15 @@ version = "1.0.23"
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@@ -1529,6 +1705,15 @@ dependencies = [
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]
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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@@ -1741,7 +1926,7 @@ checksum = "aa003f0038df784eb8fecbbac13affe3da23b45194bd57dba231c8f48199c526"
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@@ -1783,7 +1968,7 @@ checksum = "db58fcd5a53cf07c184b154801ff91347e4c30d17a3562a635ff028ad5deda46"
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@@ -1949,7 +2134,7 @@ checksum = "27ad5e34374e03cfffefc301becb44e9dc3c17584f414349ebe29ed26661822d"
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@@ -2019,6 +2204,47 @@ dependencies = [
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