Websocket Forward

• The simple library is used to support the forward proxy of websocket for applications which are based in the framework of spring boot.
• The library is based on JDK8.

Usage

spring-websocket-forward is available from Maven Central.

	<dependency>
		<groupId>com.github.ji4597056</groupId>
		<artifactId>spring-websocket-forward</artifactId>
		<version>1.0.2.RELEASE</version>
	</dependency>

Who is this for?

Spring Cloud Zuul and Spring Boot Websocket do not support the forwarding proxy of web sockets. However, we usually need the proxy of websocket.

How do I use this?

• Enable it like so:

@EnableWsForward
@SpringBootApplication
public class Application {
	public static void main(String[] args) {
		SpringApplication.run(Application.class, args);
	}
}

• Then in your spring application properties(e.g application.yml)

ws:
  forward:
    enabled: true
    handlers:
      test:
        enabled: true
        prefix: /test
        uri: /**
        serviceId: test-client
        allowedOrigins: "*"
        withJs: false

With this you can accurately get websockets support from proxied back-end service.

Configuration introduction

property	type	required	default	introduction
enabled	boolean	false	true	enabled or not
prefix	string	false	null	uri route prefix
uri	string	true	null	uri
withJs	boolean	false	false	with JS or not
forwardPrefix	string	false	null	forwarding uri route prefix
serviceId	string	false	null	find forwarding addresses from registration center by service id
listOfServers	string[]	false	null	find forwarding addresses from list of services if serviceId is not set,eg:localhost:8080
allowedOrigins	string[]	false	"*"	allowed origins
handlerClass	string	false	null	name of AbstractWsServerHandler class,use global handler if there is not set
interceptorClasses	string[]	false	null	name of HandshakeInterceptor class,use global interceptors if there is not set

Remark

if you want to set your own AbstractWsServerHandler or HandshakeInterceptor,config bean of WsHandlerRegistration like:

    @Bean
    public WsHandlerRegistration wsHandlerRegistration() {
        WsHandlerRegistration registration = new DefaultWsHandlerRegistration();
        registration.addHandler(new TestWsServerHandler());
        registration.addInterceptor(new TestHandshakeInterceptor());
        return registration;
    }

Then you can set the property of handlerClass or interceptorClasses.