Function httpNetworkOrCacheFetch

deps/undici/src/lib/web/fetch/index.js:1396–1808

(
  fetchParams,
  isAuthenticationFetch = false,
  isNewConnectionFetch = false
)

// https://fetch.spec.whatwg.org/#http-network-or-cache-fetch
async function httpNetworkOrCacheFetch (
  fetchParams,
  isAuthenticationFetch = false,
  isNewConnectionFetch = false
) {
  // 1. Let request be fetchParams’s request.
  const request = fetchParams.request

  // 2. Let httpFetchParams be null.
  let httpFetchParams = null

  // 3. Let httpRequest be null.
  let httpRequest = null

  // 4. Let response be null.
  let response = null

  // 5. Let storedResponse be null.
  // TODO: cache

  // 6. Let httpCache be null.
  const httpCache = null

  // 7. Let the revalidatingFlag be unset.
  const revalidatingFlag = false

  // 8. Run these steps, but abort when the ongoing fetch is terminated:

  //    1. If request’s window is "no-window" and request’s redirect mode is
  //    "error", then set httpFetchParams to fetchParams and httpRequest to
  //    request.
  if (request.window === 'no-window' && request.redirect === 'error') {
    httpFetchParams = fetchParams
    httpRequest = request
  } else {
    // Otherwise:

    // 1. Set httpRequest to a clone of request.
    httpRequest = cloneRequest(request)

    // 2. Set httpFetchParams to a copy of fetchParams.
    httpFetchParams = { ...fetchParams }

    // 3. Set httpFetchParams’s request to httpRequest.
    httpFetchParams.request = httpRequest
  }

  //    3. Let includeCredentials be true if one of
  const includeCredentials =
    request.credentials === 'include' ||
    (request.credentials === 'same-origin' &&
      request.responseTainting === 'basic')

  //    4. Let contentLength be httpRequest’s body’s length, if httpRequest’s
  //    body is non-null; otherwise null.
  const contentLength = httpRequest.body ? httpRequest.body.length : null

  //    5. Let contentLengthHeaderValue be null.