Function prerenderToStream

packages/next/src/server/app-render/app-render.tsx:5719–7227

(
  req: BaseNextRequest,
  res: BaseNextResponse,
  ctx: AppRenderContext,
  metadata: AppPageRenderResultMetadata,
  tree: LoaderTree,
  fallbackRouteParams: OpaqueFallbackRouteParams | null
)

}

async function prerenderToStream(
  req: BaseNextRequest,
  res: BaseNextResponse,
  ctx: AppRenderContext,
  metadata: AppPageRenderResultMetadata,
  tree: LoaderTree,
  fallbackRouteParams: OpaqueFallbackRouteParams | null
): Promise<PrerenderToStreamResult> {
  // When prerendering formState is always null. We still include it
  // because some shared APIs expect a formState value and this is slightly
  // more explicit than making it an optional function argument
  const formState = null

  const {
    assetPrefix,
    getDynamicParamFromSegment,
    implicitTags,
    nonce,
    pagePath,
    renderOpts,
    workStore,
  } = ctx

  const {
    basePath,
    buildManifest,
    ComponentMod,
    crossOrigin,
    experimental,
    isDebugDynamicAccesses,
    isBuildTimePrerendering = false,
    onInstrumentationRequestError,
    page,
    reactMaxHeadersLength,
    subresourceIntegrityManifest,
    cacheComponents,
  } = renderOpts

  const { cachedNavigations } = renderOpts.experimental

  const allowEmptyStaticShell =
    (renderOpts.allowEmptyStaticShell ?? false) ||
    (await isPageAllowedToBlock(tree))

  const rootParams = getRootParams(tree, getDynamicParamFromSegment)

  const { ServerInsertedHTMLProvider, renderServerInsertedHTML } =
    createServerInsertedHTML()
  const getServerInsertedMetadata = createServerInsertedMetadata(nonce)

  const tracingMetadata = getTracedMetadata(
    getTracer().getTracePropagationData(),
    experimental.clientTraceMetadata
  )

  const polyfills: JSX.IntrinsicElements['script'][] =
    buildManifest.polyfillFiles
      .filter(