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@gasket/plugin-https

A plugin that creates http, https and/or http2 servers based on the given gasket configuration.

Installation

New apps

gasket create <app-name> --plugins @gasket/plugin-https

Existing apps

npm i @gasket/plugin-https

Modify plugins section of your gasket.config.js:

module.exports = {
  plugins: {
    add: [
+      '@gasket/plugin-https'
    ]
  }
}

Configuration

You can specify what port to open up on, or what certificates to use via gasket.config.js.

// gasket.config.js
module.exports = {
  http: 80,
  https: {
    port: 443,
    root: '/path/to/ssl/files',
    key: 'your-key.pem',
    cert: 'your-cert.pem',
    ca: 'your-ca.pem' // Can be an Array of CAs
  },
  terminus: {
    healthcheck: '/healthcheck'
  }
};

Terminus is configured with the following defaults:

  • healthcheck: /healthcheck
  • signals: ['SIGTERM']

Any of the options that are specified on the Terminus project page are accepted in the terminus object. Just note that the functions are already assigned by default to trigger the appropriate lifecycle events.

HTTP/2

You can configure both HTTPS and HTTP/2 on the same socket with ALPN negotiation.

// gasket.config.js
module.exports = {
  http: 80,
-  https: {
+  http2: {
    port: 443,
    root: '/path/to/ssl/files',
    key: 'your-key.pem',
    cert: 'your-cert.pem',
    ca: 'your-ca.pem' // Can be an Array of CAs,
+    allowHTTP1: true
  }
};

Lifecycles

createServers

Executed in order to retrieve the server options and the handler

/**
* In this example returns the express app
*
* @param {Gasket} gasket Gasket API.
* @param {Object} serverOpts Server options.
* @returns {Express} The web server.
* @public
*/
createServers: async function createServers(gasket, serverOpts) {
  const newServerOpts;
  return { ...serverOpts, ...newServerOpts, handler: express() };
}

servers

Your application can use this plugin to hook the servers hook. These servers are provided directly from the create-servers callback.

/**
 * Called when all servers are created.
 *
 * @param {Gasket} gasket The Gasket API
 * @param {object} servers - http and/or https servers
 * @return {Promise<object>} updated manifest
 */
module.exports = async function serversHook(gasket, servers) {
  const cert = servers.https.cert;

  console.log('Started https server with cert:');
  console.log(cert);
}

In a typical use case, the servers object will contain server instances for http and https keys. In some cases if there are multiple configs and servers created, this will be an array of servers. See create-servers docs for more details.

terminus

Allows you to dynamically configure terminus and override any of the handlers that we assign by default. Our default handlers onSendFailureDuringShutdown, beforeShutdown, onSignal, and onShutdown all take care of triggering the appropriate lifecycle events, so if you override those, you will no longer receive those events.

/**
 * Allows for dynamic configuration
 *
 * @param {Gasket} gasket Gasket API.
 * @param {Object} terminus Terminus options.
 * @returns {Object} The configuration.
 * @public
 */
module.exports = {
  hooks: {
    terminus: async function (gasket, terminus) {
      console.log(terminus); // { ... terminus options ... }

      return terminus
    }
  }
}

healthcheck

Triggered when the specified healthcheck route is requested on the server. This lifecycle allows you to assert if everything in your server is still working as intended. A thrown error is considered a failed checked.

module.exports = {
  hooks: {
    healthcheck: async function healthcheck(gasket, HealthCheckError) {
      await checkDatabaseConnection();
      await doAnotherSanityCheck();
    }
  }
}

The lifecycle receives the custom HealthCheckError class from terminus if you want to throw custom errors.

onSendFailureDuringShutdown

Triggered when terminus about to send a 503 Error to the healthcheck route but server is currently shutting down.

module.exports = {
  hooks: {
    onSendFailureDuringShutdown: async function onSendFailureDuringShutdown(gasket) {
      gasket.logger.info('healthcheck failed but we are already shutting down');
    }
  }
}

beforeShutdown

Triggered when we've received a signal that triggered the shutdown process of the server. This is the first function that is called and allows you to clean up your server before it's stopped.

module.exports = {
  hooks: {
    beforeShutdown: async function beforeShutdown(gasket) {
      gasket.logger.info('the server is about to shut down');
    }
  }
}

onSignal

Triggered when the server is stopped. Allowing you to clean up everything you need before your node process is shutting down.

module.exports = {
  hooks: {
    onSignal: async function onSignal(gasket) {
      await stopDatabaseConnect();
      await cleanupTmpFiles();
    }
  }
}

onShutdown

Triggered when the onSignal lifecycle has completed, right before the node process is killed.

module.exports = {
  hooks: {
    onShutdown: async function onShutdown(gasket) {
      gasket.logger.info('Closing server');
    }
  }
}

License

MIT