@zkochan/pnpm/cached_node_modules/superstatic/lib/middleware/missing.js

A fast implementation of npm install

/**
 * Copyright 2015 Google Inc. All Rights Reserved.
 * Use of this source code is governed by a BSD-style
 * license that can be found in the LICENSE file or at
 * https://github.com/firebase/superstatic/blob/master/LICENSE
 */
'use strict';

var setHeaders = require('./headers');
var fs = require('fs');

module.exports = function(spec) {
  var defaultErrorContent;
  if (spec.errorPage) {
    defaultErrorContent = fs.readFileSync(spec.errorPage, 'utf8');
  }

  return function(req, res, next) {
    var config = req.superstatic;
    var errorPage = config.errorPage || '/404.html';

    setHeaders(spec)({
      superstatic: config,
      url: errorPage
    }, res, function() {
      var handles = [{file: errorPage, status: 404}];
      if (defaultErrorContent) {
        handles.push({data: defaultErrorContent, status: 404});
      }
      res.superstatic.handle(handles, next);
    });
  };
};