Spring boot/Spring MVC - How to forward a response from another request - spring

Question

I need a rest end point whose response is HTML. But instead of a view defined in my project, i would like to forward the HTML response from another request made inside that rest end point.
For example, my rest end point makes a http request to an internal service and returns the HTML returned from that service? Is it possible? Any thoughts?
Here is a code example
#RequestMapping("/test")
public String testMe(Model model, #RequestParam("param1") String param1, #RequestParam("param2") String param2)
{
//Make a Http call to an internal service and return the response from that call
return "<RESPONSE_FROM_THAT_CALL>";
}
I would like to return the HTML response from the internal service

Answer 1

You can use a RestTemplate to fetch the result from the other service and just return it as a String:
#Controller
public class MyController {
private RestTemplate restTemplate = new RestTemplate();
#ResponseBody
#RequestMapping("/test")
public String testMe(Model model, #RequestParam("param1") String param1, #RequestParam("param2") String param2) {
URI uri = UriComponentsBuilder.fromHttpUrl("http://www.example.com");
.queryParam("param1", param1)
.queryParam("param2", param2)
.build()
.toUri());
return restTemplate.getForObject(uri, String.class);
}
}
If you'll have more endpoints that you wanna proxy to another service, you should consider using e.g. Zuul as a micro proxy. See e.g. this blog post explaining how you can easily create such a proxy.