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1fdd2ecf20
Changes mostly authored-by: Leon Zandman <leon@wirwar.com> Cherry pick and minor additions by GCHQDeveloper581 <63102987+GCHQDeveloper581@users.noreply.github.com>
31 lines
1.2 KiB
JavaScript
31 lines
1.2 KiB
JavaScript
/**
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* Polyfill for Node.js 22+ where globalThis.fetch is built-in but rejects
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* bare filesystem paths. WASM libraries like argon2-browser call fetch() with
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* an absolute path (e.g. "/path/to/argon2.wasm") expecting a browser-style
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* fallback, but Node.js 22's fetch throws synchronously for non-URL strings.
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*
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* This wrapper intercepts such calls and serves the file via Node's fs module,
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* returning a synthetic Response so the WASM module loads correctly.
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*/
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import { readFile } from "fs/promises";
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if (globalThis.fetch) {
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const originalFetch = globalThis.fetch;
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globalThis.fetch = async function patchedFetch(url, options) {
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const urlStr = typeof url === "string" ?
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url :
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url instanceof URL ?
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url.href :
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String(url);
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// Intercept bare filesystem paths (absolute POSIX or Windows)
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if (urlStr.startsWith("/") || /^[A-Za-z]:[/\\]/.test(urlStr)) {
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const buffer = await readFile(urlStr);
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return new Response(buffer, {
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status: 200,
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headers: { "Content-Type": "application/wasm" },
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});
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}
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return originalFetch(url, options);
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};
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}
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