Handling the root URI using SimpleServerFactory

[Joe Barnett]

Hello,

We're using SimpleServerFactory and running on heroku, and would like the root url (eg https://my-dropwizard-app.herokuapp.com ) to redirect to the applicationContextPath (eg https://my-dropwizard-app.herokuapp.com/application ) rather than always return a 404.  It looks like this can be done by subclassing SimpleServerFactory and overriding the `build` method to copy/paste everything with an additional `ContextRoutingHandler` map entry that handles "/" with a Handler that returns a 302 redirect to the applicationContextPath, but would prefer to not have to duplicate the `build` method logic.  Is there a hook that we're missing that would solve this issue differently?  If not, would it make sense to add a way for applications to configure the SimpleServerFactory to handle the root URI?

Thanks,

-Joe

[Bobby Johansen]

This sounds like a good use case for nginx or a reverse proxy rather than dropwizard. It would be a bit odd for dropwizard to redirect the domain root context to its application context as there could be and typically are other services living behind a single domain. I am by no means a Heroku expert but it feels like the responsibility of the root domain should live with something on the network layer rather than the application layer.

--Bobby Johansen

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[Dimas Guardado]

One way to implement this is to mount the application context at "/" and the jersey root at "/application", then registering a redirect servlet at "/"

```config.yml

server:
  type: simple
  applicationContextPath: /
  rootPath: /application
  adminContextPath: /admin

```

```YourApplication.java

    @Override
    public void run(final SampleContextConfiguration configuration,
                    final Environment environment) {
        environment.servlets().addServlet("root-redirect", new HttpServlet() {
            @Override
            protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
                resp.sendRedirect("/application");
            }
        }).addMapping(""); // empty string maps to root path only, "/" will map to any unmapped path
    }

```

Does that do what you're looking for?

-Dimas

[Joe Barnett]

That does, thanks!