Hapi-heroku-helpers NPM

Hapi Heroku Helpers

hapi.js plugin which provides additional functionality which can be useful when running a hapi.js site on Heroku.

Note: Version 2 and above of this module requires Node 4 or above and Hapi 11 or above.

Heroku

The Heroku platform automatically routes HTTP requests sent to your app’s hostname(s) to your web dynos. Inbound requests are received by a load balancer that offers SSL termination. From there they are passed directly to a set of routers which routes the request to your application. Think of it as a reverse proxy.

HTTPS

If you want your site to have https urls, that SSL termination happens on the edge of the heroku network, and the request is routed to your application using http. By default this plugin allows you to have any http request redirected automatically to a https request (see redirectHttpToHttps setting)

Client IP Address

Your hapi site will see the incoming HTTP request as coming from the IP address of the Heroku router and set this IP to request.info.remotePort. In the majority of cases you most likely are interested in the originating IP address and not the routers address. By default this plugin sets request.info.remoteAddress to the value of the x-forwarded-for header which Heroku sets to the originating IP address (see remoteAddressToClientIp setting)

Client Port

Your hapi site will see the incoming HTTP request as coming from the PORT that hapi is running on inside the Heroku platform (which is rarely the port your site is running on - i.e. 80 or 443). In the majority of cases you most likely are interested in the port that the client is connecting on. By default this plugin sets request.info.remotePort to the value of the x-forwarded-port header which Heroku sets to the originating port (see remotePortToClientPort setting)

Request ID

Your hapi site will generate an unique identifier for each incoming request. By default this plugin sets the request.id to the value of the x-request-id header which Heroku already generates for each incoming request (see mapRequestId setting)

Options

The following options are available:

redirectHttpToHttps: if true and the x-forwarded-proto header equals http, will result in the request being redirected via a 301 to the https:// version of the URL. Heroku sets the x-forwarded-proto header to the originating protocol of the HTTP request (example: http). For example, http://localhost:3000/some-url would redirect to https://localhost:3000/some-url. Defaults to true.
remoteAddressToClientIp: if true, will set request.info.remoteAddress to the value of the x-forwarded-for header if it exists and is non-empty. Heroku set the x-forwarded-for header to the originating IP address of the client connecting to the Heroku router. Defaults to true.
remotePortToClientPort: if true, will set request.info.remoteAddress to the value of the x-forwarded-port header if it exists and is non-empty. Heroku set the x-forwarded-port header to the originating port of the HTTP request (example: 443). Defaults to true.
mapRequestId: if true, will set request.id to the value of the x-request-id header if it exists and is non-empty. Heroku set the x-request-id header to an unique identifier per request. This setting allows you to map any request logged by Heroku to a request received by your application. Defaults to true.

Usage

const Hapi = require('hapi');

const server = new Hapi.Server();
server.connection();

server.register(require('hapi-heroku-helpers'), function (err) {

    // Assuming no err, start server

    server.start(function () {
        // ..
    });
});