jcoffey-dev
71d211a13f
The web build now writes a Brotli and a gzip copy of each compressible file, and the static handler serves the best one the browser accepts. The bundle was gzipped again for every request and Brotli was never offered; the main chunk is 122 KB with Brotli against 144 KB gzipped. index.html and every static file carry an ETag, and a matching If-None-Match gets a 304. The shell and the worker are revalidated on every load and were downloaded whole each time. Attachment downloads pass a plain byte Range to Stalwart and relay a 206, so a PDF viewer or a video element can read in pieces where the server allows it. On the reader's own device a blob is cached as immutable, since its id names its content. The upstream session and account-info caches drop entries past their age on a timer; they lost an entry only on sign-out or refusal, not when a session expired. The mock answers byte ranges.
48 lines
1.8 KiB
JavaScript
48 lines
1.8 KiB
JavaScript
#!/usr/bin/env node
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/*
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* Write a Brotli and a gzip copy beside every compressible file in a web build.
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*
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* The server used to gzip the bundle again on every request that asked for it,
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* at a level chosen for speed. These are made once, at the level chosen for
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* size, and `server/src/static.ts` hands one out when the browser accepts it.
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* Brotli at 11 is about 15% smaller than gzip for this bundle, and too slow to
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* do per request, which is why it was never offered.
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*
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* node scripts/precompress.mjs web/dist
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*/
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import { readdirSync, readFileSync, statSync, writeFileSync } from "node:fs";
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import { join, extname } from "node:path";
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import { brotliCompressSync, constants, gzipSync } from "node:zlib";
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const COMPRESSIBLE = new Set([".js", ".mjs", ".css", ".html", ".svg", ".json", ".webmanifest", ".txt", ".wasm"]);
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// Below this, the encoding costs more than it saves.
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const MIN_BYTES = 1024;
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function* files(dir) {
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for (const entry of readdirSync(dir, { withFileTypes: true })) {
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const p = join(dir, entry.name);
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if (entry.isDirectory()) yield* files(p);
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else yield p;
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}
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}
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const root = process.argv[2];
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if (!root) {
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console.error("usage: precompress.mjs <dir>");
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process.exit(2);
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}
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let count = 0;
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let before = 0;
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let after = 0;
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for (const p of files(root)) {
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if (!COMPRESSIBLE.has(extname(p)) || statSync(p).size < MIN_BYTES) continue;
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const data = readFileSync(p);
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const br = brotliCompressSync(data, { params: { [constants.BROTLI_PARAM_QUALITY]: 11, [constants.BROTLI_PARAM_SIZE_HINT]: data.length } });
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writeFileSync(`${p}.br`, br);
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writeFileSync(`${p}.gz`, gzipSync(data, { level: 9 }));
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count++;
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before += data.length;
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after += br.length;
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}
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console.log(`precompressed ${count} files: ${(before / 1024).toFixed(0)} KB -> ${(after / 1024).toFixed(0)} KB brotli`);
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