feat: Add middleware plugins from fl4re/sinopia

This is basically the PR fl4re/sinopia#18 by @fredr

conf/full.yaml

@@ -186,3 +186,8 @@ notify:
     content: ' {{ handlebar-expression }}'
     # For Slack, follow the following format:
     # content: '{ "text": "Package *{{ name }}* published to version *{{ dist-tags.latest }}*", "username": "Verdaccio", "icon_emoji": ":package:" }'
+
+# Configure plugins that can register custom middlewares
+#middlewares:
+# plugin-name:
+#   setting: true

src/api/index.js

@@ -11,6 +11,7 @@ const Cats = require('../lib/status-cats');
 const Storage = require('../lib/storage');
 const _ = require('lodash');
 const cors = require('cors');
+const load_plugins = require('../lib/plugin-loader').load_plugins;
 
 module.exports = function(config_hash) {
   // Config
@@ -80,6 +81,17 @@ module.exports = function(config_hash) {
       });
     });
   }
+  // register middleware plugins
+  const plugin_params = {
+    config: config,
+    logger: Logger.logger,
+  };
+  const plugins = load_plugins(config, config.middlewares, plugin_params, function(p) {
+    return p.register_middlewares;
+  });
+  plugins.forEach(function(p) {
+    p.register_middlewares(app, auth, storage);
+  });
 
   // For  npm request
   app.use(require('./endpoint')(config, auth, storage));

test/functional/fixtures/plugins/middlewares.js

@@ -0,0 +1,17 @@
+
+module.exports = Plugin
+
+function Plugin(config, stuff) {
+  var self = Object.create(Plugin.prototype)
+  self._config = config
+  return self
+}
+
+Plugin.prototype.register_middlewares = function (app, auth, storage) {
+  var message = this._config.message
+
+  app.get('/test/route', function (req, res, next) {
+    res.status(200)
+    return next({ ok: message })
+  });
+}

test/functional/index.js

@@ -74,6 +74,7 @@ describe('Create registry servers', function() {
   require('./adduser/logout')();
   require('./tags/addtag.spec')();
   require('./plugins/auth.spec')();
+  require('./plugins/middleware.spec')();
   require('./notifications/notify')();
   // requires packages published to server1/server2
   require('./uplink.cache.spec')();

test/functional/plugins/middleware.spec.js

@@ -0,0 +1,19 @@
+'use strict';
+
+require('../lib/startup');
+
+
+module.exports = function () {
+  const server2 = process.server2;
+
+  describe('middlewares', function() {
+    it('should serve the registered route', function() {
+      return server2.request({
+        uri: '/test/route',
+        method: 'GET'
+      })
+      .status(200)
+      .body_ok('this is a custom route')
+    })
+  })
+}

test/functional/store/config-2.yaml

@@ -14,6 +14,10 @@ uplinks:
 web:
   enable: true
 
+middlewares:
+  ../fixtures/plugins/middlewares:
+    message: this is a custom route
+
 auth:
   ../fixtures/plugins/authenticate:
     accept_user: authtest2