etherpad-lite/src/node/hooks/express/static.js

'use strict';

const minify = require('../../utils/Minify');
const plugins = require('../../../static/js/pluginfw/plugin_defs');
const CachingMiddleware = require('../../utils/caching_middleware');
const Yajsml = require('etherpad-yajsml');

exports.expressCreateServer = (hookName, args, cb) => {
  // Cache both minified and static.
  const assetCache = new CachingMiddleware();
  args.app.all(/\/javascripts\/(.*)/, assetCache.handle);

  // Minify will serve static files compressed (minify enabled). It also has
  // file-specific hacks for ace/require-kernel/etc.
  args.app.all('/static/:filename(*)', minify.minify);

  // Setup middleware that will package JavaScript files served by minify for
  // CommonJS loader on the client-side.
  // Hostname "invalid.invalid" is a dummy value to allow parsing as a URI.
  const jsServer = new (Yajsml.Server)({
    rootPath: 'javascripts/src/',
    rootURI: 'http://invalid.invalid/static/js/',
    libraryPath: 'javascripts/lib/',
    libraryURI: 'http://invalid.invalid/static/plugins/',
    requestURIs: minify.requestURIs, // Loop-back is causing problems, this is a workaround.
  });

  const StaticAssociator = Yajsml.associators.StaticAssociator;
  const associations = Yajsml.associators.associationsForSimpleMapping(minify.getTar());
  const associator = new StaticAssociator(associations);
  jsServer.setAssociator(associator);

  args.app.use(jsServer.handle.bind(jsServer));

  // serve plugin definitions
  // not very static, but served here so that client can do
  // require("pluginfw/static/js/plugin-definitions.js");
  args.app.get('/pluginfw/plugin-definitions.json', (req, res, next) => {
    const clientParts = plugins.parts.filter((part) => part.client_hooks != null);
    const clientPlugins = {};
    for (const name of new Set(clientParts.map((part) => part.plugin))) {
      clientPlugins[name] = {...plugins.plugins[name]};
      delete clientPlugins[name].package;
    }
    res.header('Content-Type', 'application/json; charset=utf-8');
    res.write(JSON.stringify({plugins: clientPlugins, parts: clientParts}));
    res.end();
  });

  return cb();
};