/
get_source.js
44 lines (39 loc) · 1.28 KB
/
get_source.js
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'use strict';
const {
RegExpPrototypeExec,
} = primordials;
const { getOptionValue } = require('internal/options');
// Do not eagerly grab .manifest, it may be in TDZ
const policy = getOptionValue('--experimental-policy') ?
require('internal/process/policy') :
null;
const { Buffer } = require('buffer');
const fs = require('internal/fs/promises').exports;
const { URL } = require('internal/url');
const {
ERR_INVALID_URL,
ERR_INVALID_URL_SCHEME,
} = require('internal/errors').codes;
const readFileAsync = fs.readFile;
const DATA_URL_PATTERN = /^[^/]+\/[^,;]+(?:[^,]*?)(;base64)?,([\s\S]*)$/;
async function defaultGetSource(url, { format } = {}, defaultGetSource) {
const parsed = new URL(url);
let source;
if (parsed.protocol === 'file:') {
source = await readFileAsync(parsed);
} else if (parsed.protocol === 'data:') {
const match = RegExpPrototypeExec(DATA_URL_PATTERN, parsed.pathname);
if (!match) {
throw new ERR_INVALID_URL(url);
}
const [ , base64, body ] = match;
source = Buffer.from(body, base64 ? 'base64' : 'utf8');
} else {
throw new ERR_INVALID_URL_SCHEME(['file', 'data']);
}
if (policy?.manifest) {
policy.manifest.assertIntegrity(parsed, source);
}
return { source };
}
exports.defaultGetSource = defaultGetSource;