Function renderToHTMLImpl

packages/next/src/server/render.tsx:457–1610

(
  req: IncomingMessage,
  res: ServerResponse,
  pathname: string,
  query: NextParsedUrlQuery,
  renderOpts: Omit<RenderOpts, keyof RenderOptsExtra>,
  extra: RenderOptsExtra,
  sharedContext: PagesSharedContext,
  renderContext: PagesRenderContext
)

}

export async function renderToHTMLImpl(
  req: IncomingMessage,
  res: ServerResponse,
  pathname: string,
  query: NextParsedUrlQuery,
  renderOpts: Omit<RenderOpts, keyof RenderOptsExtra>,
  extra: RenderOptsExtra,
  sharedContext: PagesSharedContext,
  renderContext: PagesRenderContext
): Promise<RenderResult> {
  // Adds support for reading `cookies` in `getServerSideProps` when SSR.
  setLazyProp({ req: req as any }, 'cookies', getCookieParser(req.headers))

  // cssCacheBuster is a workaround for a Safari bug
  // (https://bugs.webkit.org/show_bug.cgi?id=187726) where preloaded CSS
  // resources are cached and not re-fetched on HMR. It must only be applied
  // to CSS and font assets — not to script tags — because the Turbopack
  // runtime infers ASSET_SUFFIX from the executing script's query string and
  // leaks it onto all static asset URLs (including images), causing
  // next/image validation errors.
  // See https://github.com/vercel/next.js/issues/92118.
  const cssCacheBuster = getSafariCacheBusterQueryString(req)

  const mutableAssetQueryString = sharedContext.deploymentId
    ? `?dpl=${sharedContext.deploymentId}`
    : ''
  const assetQueryString = sharedContext.clientAssetToken
    ? `?dpl=${sharedContext.clientAssetToken}`
    : ''
  // cssAssetQueryString is assetQueryString with the cacheBuster prepended.
  // Use this for CSS and font URLs; use assetQueryString for script URLs.
  const cssAssetQueryString =
    cssCacheBuster +
    (sharedContext.clientAssetToken
      ? `${cssCacheBuster ? '&' : '?'}dpl=${sharedContext.clientAssetToken}`
      : '')
  const metadata: PagesRenderResultMetadata = {}

  // don't modify original query object
  query = Object.assign({}, query)

  const {
    err,
    pageConfig = {},
    buildManifest,
    reactLoadableManifest,
    ErrorDebug,
    getStaticProps,
    getStaticPaths,
    getServerSideProps,
    isNextDataRequest,
    params,
    previewProps,
    basePath,
    images,
    runtime: globalRuntime,
    isExperimentalCompile,
    expireTime,