Springcloud gateway + BFF

[ramonli]

I'm looking for a way to introduce BFF(backend for frontend) into gateway. Basically my idea is implementing some web controllers in springcloud gateway, and making all requests go through global/customized filters, and then enter my own web controllers(a uri like 'forward:/api/hello/gulu'). For example my routes is defined as below:

@Bean
public RouteLocator customRouteLocator(RouteLocatorBuilder builder) {
    return builder.routes().route("hello", r -> {
            logger.debug("Hello, there...{}", r);
            return r.path("/**").filters(f -> {
                logger.debug("add request header...");
                return f.addRequestHeader("header1", "header-value-1");
            }).uri("https://httpbin.org/get");
        }).build();
}

and a global filter:

public class CustomGlobalFilter implements GlobalFilter, Ordered {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        logger.info("custom global filter:{}", exchange.getRequest().getURI());
        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        return -1;
    }
}

and a customized web controller:

@RestController
@RequestMapping("/api")
public class HelloController {

    private Logger logger = LoggerFactory.getLogger(HelloController.class);

    @GetMapping("/hello/{name}")
    public String hello(@PathVariable String name) {
        logger.debug("hello, {}", name);
        return "hello," + name;
    }
}

My expectation is that when client requests url 'http://localhost:18006/api/hello/ramon', it shoud intercepted by route 'hello', and then at least filtered by my CustomGlobalFilter, and finally hit HelloController. But the actual result is the request handled by RequestMappingHandlerMapping, just like a simple pure web controller, no any routes or filters triggered.

I am wondering whether it is right to introduce BFF into springcloud gateway, or there is some elegant way to implement this?

[spencergibb]

Your controller matches /api first, it never hits the gateway

[ramonli]

@spencergibb that is exactly what i want, make the request hit gateway first. Is there any means to implement it?

[spencergibb]

Change the controller mapping to something else and move /api to a gateway route

[ramonli]

yes, but if client access the web controller's URL directly, it will bypass gateway. That is some kind of risk, all my filters, something like rate limiter, will be ignored.

[spencergibb]

Move the controllers out of gateway I guess.

[spring-projects-issues]

If you would like us to look at this issue, please provide the requested information. If the information is not provided within the next 7 days this issue will be closed.

[spring-projects-issues]

Closing due to lack of requested feedback. If you would like us to look at this issue, please provide the requested information and we will re-open the issue.