Enable both http and https on Spring Boot

Building on How to Enable HTTP and HTTPS in Spring Boot which is a bit outdated nowadays.

To enable support for HTTP and HTTPS in Spring Boot 2, we need to register an additional connector with Spring Boot application.

First, enable SSL/HTTPS for Spring Boot, for example by following the HTTPS using Self-Signed Certificate in Spring Boot tutorial.

Now, add server.http.port=8080 to application.properties.

To add another Tomcat connector, create the following configuration class:

import org.apache.catalina.connector.Connector;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory;
import org.springframework.boot.web.server.WebServerFactoryCustomizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class AppConfiguration {
    @Bean
    public WebServerFactoryCustomizer<TomcatServletWebServerFactory> cookieProcessorCustomizer() {
        return (TomcatServletWebServerFactory factory) -> {
            // also listen on http
            final Connector connector = new Connector();
            connector.setPort(httpPort);
            factory.addAdditionalTomcatConnectors(connector);
        };
    }

    @Value("${server.http.port}")
    private int httpPort;
}

Written on August 25, 2021