All files / lib/internal/modules/esm get_source.js

95.56% Statements 43/45
86.67% Branches 13/15
100% Functions 1/1
95.56% Lines 43/45

Press n or j to go to the next uncovered block, b, p or k for the previous block.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46136x 136x 136x 136x 136x 136x 136x 136x 136x 136x 136x 136x 136x 136x 136x 136x 136x 136x 136x 136x 136x 136x 136x 136x 361x 361x 361x 361x 333x 357x 28x 28x 1x 1x 27x 28x 28x     361x 3x 3x 357x 361x 136x  
'use strict';
 
const {
  RegExpPrototypeExec,
  decodeURIComponent,
} = 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 { 1: base64, 2: body } = match;
    source = Buffer.from(decodeURIComponent(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;