Express middleware to handle HTTP ping requests (GET and HEAD).

agentia-ping-handler intercepts HEAD and GET requests to /ping and immediately replies with a 200 status code, preventing other Express middlewares from loading.

This is useful to prevent session and other unnecessary middleware to load when your site/app pinged by an external monitoring service.

Installation

agentia-ping-handler is available on npm

npm install --save agentia-ping-handler

Usage

app.use(pingHandler({options}))

Express

We recommend that you configure agentia-ping-handler as the first Express middleware. At the very least, before any session middleware, to prevent sessions from being created as a result of monitoring pings.

var pingHandler = require('agentia-ping-handler');

var app = express();

app.use(pingHandler());

KeystoneJS

To use with KeystoneJS just use the Express instance exposed in the .app property.

var pingHandler = require('agentia-ping-handler');

var keystone = require('keystone');

keystone.init({
	...
});

keystone.app.use(pingHandler());

Configuration Options

By default, agentia-ping-handler intercepts HEAD and GET requests to /ping. However, agentia-ping-handler offers allows you to set customize any of these defaults. The options can be configured by passing confuration obbject to the pingHandler() middleware function.

app.use(pingHandler({
  methods: 'GET'
  path: '/ping',
  payload: 'OK'
}));

Available configuration options include:

Option | Type | Description | Default Value ------ | ---- | ----------- | ------------- methods | StringArray | HTTP methods to be processed (currently only GET and HEAD are supported) | ['GET', 'HEAD'] path | String | path/route to be processed | '/ping' payload | StringObject | data sent in response to GET requests | 'OK'

Deprecated methods

The following methods are deprecated and will be removed in future versions of agentia-ping-handler.

Method | Deprecation Version | Removal Version ------ | :-------------------: | :------------------------: .set() | 1.1.0 | 2.0.0 .config() | 1.1.0 | 2.0.0 .middleware() | 1.1.0 | 2.0.0

License

Agentia Ping Handler is free and open source under the MIT License.

Copyright (c) 2015 Johnny Estilles, http://www.agentia.asia

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.