http-health-endpoint

HTTP server as a module that will return configurable health info on request.
Usage:

var HttpHealthEndpoint = require('http-health-endpoint');

function healthCheckFn(cb) {
  process.nextTick(cb.bind(null, null, {
    ok: true,
    things: 'are good',
    no: 'problems to report'
  }));
}
var health = new HttpHealthCheck({ port: 10060 }, healthCheckFn);
health.createServer();

Any requests to localhost:10060 will return either a 200 or 503 depending on what healthCheckFn() returns.

$ curl -i locahost:10060
HTTP/1.1 200 OK
Content-Type: application/json
Date: Wed, 24 Sep 2014 17:01:01 GMT
Connection: keep-alive
Transfer-Encoding: chunked

{"ok":true,"things":"are good","no":"problems to report"}

If the health check function returns an object containing ok: false then it will result in a status code of 503.
The default options are as follows:

{
  port: 10060,
  path: '/',
  okField: 'ok',
  okValue: true
};

...override them by passing them to the first argument of the constructor.
Check out the tests for detailed usage.

Licence

MIT