Configure Spring Boot for SPA frontend

Question

I have application where whole frontend part is laying in resource. I would like to separate things apart. And have separate server for UI, provided by gulp, for example.

Answer 1

EpicPandaForce has a great answer, and I wanted to expand on it. The following endpoint will allow matching on nested routes as well. If you wanted to have an admin section, you can configure it to return a different index.html.

@Controller
class PageController {

    @GetMapping("/**/{path:[^\\.]*}")
    fun forward(request: HttpServletRequest): String? {
        if(request.requestURI.startsWith("/admin")) {
            return "forward:/admin/index.html"
        }
        return "forward:/index.html"
    }
}

This RequestMapping (or @GetMapping) works by excluding any request that contains a period (i.e. "index.html").