mirror of
https://github.com/morluto/rea
synced 2026-10-27 06:33:32 -04:00
morluto
28 lines
952 B
TypeScript
28 lines
952 B
TypeScript
import { err, ok, type Result } from "../result.js";
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/** Relative module syntax differs from an arbitrary dot-prefixed filename. */
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export const isRelativeJavaScriptModuleSpecifier = (value: string): boolean =>
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value === "." ||
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value === ".." ||
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value.startsWith("./") ||
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value.startsWith("../");
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/** Node file-module URL paths decode once and reject encoded separators. */
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export const decodeJavaScriptModuleUrlPath = (
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value: string,
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): Result<string, string> => {
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if (/%(?:2f|5c)/iu.test(value))
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return err(
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"ES module URL paths cannot contain percent-encoded slash or backslash bytes.",
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);
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try {
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const decoded = decodeURIComponent(value);
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return decoded.includes("\0")
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? err("The decoded module URL path contains NUL.")
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: ok(decoded);
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} catch (cause: unknown) {
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if (!(cause instanceof URIError)) throw cause;
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return err("The module URL path contains malformed percent encoding.");
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}
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};
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