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a32f09021f
- Add new `discourse/app/workers/...` directory - Adds a custom rolldown plugin which can create a dynamic entrypoint and return a digested URL for it - Update media-optimization service to use this new rolldown interface, and launch the worker via a `blob:` - Updates media-optimization to use type:module worker, and improve boot-error-handling strategy This is an improvement for a few reasons: 1. We can drop all the manual entrypoint/manifest/ruby config which was used to obtain the media-optimization bundle URL 2. We don't need to serve the worker from the (undigested/uncached) `public/` directory on the forum domain. Instead we just generate a one-liner worker entrypoint and create a blob from it 3. Since we're launching from a blob, the worker inherits the CSP of the host document, which is a nice defense-in-depth improvement
49 lines
1.6 KiB
JavaScript
Vendored
49 lines
1.6 KiB
JavaScript
Vendored
import { relative } from "path";
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const PREFIX = "virtual:dynamic-chunk-url:";
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const RESOLVED_PREFIX = "\0" + PREFIX;
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/*
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* Importing `virtual:dynamic-chunk-url:<specifier>` emits <specifier> as its own
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* bundled, hashed chunk and resolves to that chunk's final URL (a string). The
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* specifier is resolved like a normal import (relative to the importer).
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*
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* For example, a worker can be started from a blob bootstrap that imports the real
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* chunk by absolute URL, so the worker inherits the host document CSP.
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*/
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export default function dynamicChunkUrlPlugin() {
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return {
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name: "dynamic-chunk-url",
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resolveId: {
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filter: { id: /^virtual:dynamic-chunk-url:/ },
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async handler(source, importer) {
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const target = source.slice(PREFIX.length);
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const resolved = await this.resolve(target, importer, {
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skipSelf: true,
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});
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if (!resolved) {
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this.error(`dynamic-chunk-url: could not resolve "${target}"`);
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}
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return { id: RESOLVED_PREFIX + resolved.id };
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},
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},
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load: {
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filter: { id: /^\0virtual:dynamic-chunk-url:/ },
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handler(id) {
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const target = id.slice(RESOLVED_PREFIX.length);
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const refId = this.emitFile({
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type: "chunk",
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id: target,
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name: relative(process.cwd(), target)
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.replace(/\.[^.]+$/, "")
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.replace(/[/\\]/g, "-"),
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preserveSignature: "strict",
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});
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return {
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code: `export default import.meta.ROLLUP_FILE_URL_${refId};`,
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moduleType: "js",
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};
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},
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},
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};
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}
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