astro/dist/assets/fonts/core/font-file-middleware.js

Astro is a modern site builder with web best practices, performance, and DX front-of-mind.

import { isAstroError } from "../../../core/errors/errors.js";
import { formatErrorMessage } from "../../../core/messages/runtime.js";
import { collectErrorMetadata } from "../../../core/errors/dev/utils.js";
function resToMinimalResponse(res) {
  return {
    setHeader: (...args) => res.setHeader(...args),
    end: (...args) => res.end(...args),
    setStatusCode: (statusCode) => {
      res.statusCode = statusCode;
    }
  };
}
async function fontFileMiddleware({
  url: _url,
  response,
  next,
  fontFetcher,
  fontTypeExtractor,
  logger,
  fontFileById
}) {
  if (!fontFetcher || !fontTypeExtractor || !fontFileById) {
    logger.debug("assets", "Fonts dependencies should be initialized by now, skipping middleware.");
    return next();
  }
  if (!_url) {
    return next();
  }
  const url = new URL(_url, "http://localhost");
  const fontId = url.pathname.slice(1);
  const fontData = fontFileById.get(fontId);
  if (!fontData) {
    return next();
  }
  response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate, max-age=0");
  response.setHeader("Pragma", "no-cache");
  response.setHeader("Expires", "0");
  try {
    const buffer = await fontFetcher.fetch({ id: fontId, ...fontData });
    response.setHeader("Content-Length", buffer.byteLength.toString());
    response.setHeader("Content-Type", `font/${fontTypeExtractor.extract(fontId)}`);
    response.setStatusCode(200);
    response.end(buffer);
  } catch (err) {
    logger.error("assets", "Cannot download font file");
    if (isAstroError(err)) {
      logger.error(
        "SKIP_FORMAT",
        formatErrorMessage(collectErrorMetadata(err), logger.level() === "debug")
      );
    }
    response.setStatusCode(500);
    response.end();
  }
}
export {
  fontFileMiddleware,
  resToMinimalResponse
};