Dynamic Request Routing via Spring Cloud Gateway

I have recently started working on Spring Cloud Gateway. I added the following maven dependency in my project:

<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>

But I couldn’t find what I was expecting to be included in a basic API gateway. I am trying to achieve the followings:

Simple Request Routing I want my gateway to to receive a request and execute another url defined in Uri. But, I couldn’t find a way to receive GET request in gateway and execute POST request and vice versa. For example, in the example below, how may I execute Uri as POST?

    .route(r ->
                    r.path("/controller/action/{uhbgy}").and().method(HttpMethod.GET)
                      .uri("https://ip:port/group/2/${id}")
               )

Reading request/query parameters from header/body from source request (path) and pass it to the destination request (Uri)?
Changing routing rules at run time without any need to restart the application. Like I could define Uri to run against particular path in some file and may change it at run time.

I think 1st and 2nd point is very basic and should be supported. Can anyone please confirm that either SCG supports these things or not? Or either I missed in the documentation.

@spencergibb Can you please have a look into these points. Thanks

Issue Analytics

State:
Created 5 years ago
Comments:11 (6 by maintainers)

Top GitHub Comments

3reactions

botorabicommented, Jun 12, 2019

Just one late comment about dynamically update the routes, you can do it during runtime by using the event publisher ApplicationEventPublisher. After changing your routes all you need is calling the method refreshRoutes() on the following component.

` @Component public class GatewayRoutesRefresher implements ApplicationEventPublisherAware {

private ApplicationEventPublisher publisher;

@Override
public void setApplicationEventPublisher(ApplicationEventPublisher applicationEventPublisher) {
    publisher = applicationEventPublisher;
}

public void refreshRoutes() {
    publisher.publishEvent(new RefreshRoutesEvent(this));
}

} `

For a more complete reference on dynamically setup and modification of routes take a look on following open source project: https://github.com/botorabi/HomieCenter In particular this folder should be of your interest: https://github.com/botorabi/HomieCenter/tree/master/src/main/java/net/vrfun/homiecenter/reverseproxy

1reaction

spencergibbcommented, Oct 22, 2018

The path in the uri does not know about {id}. Please use the SetPath filter.

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