Spring Boot Redirect Http to Https

Spring Boot redirect HTTP to HTTPS

For Tomcat to perform a redirect, you need to configure it with one or more security constraints. You can do this by post-processing the Context using a TomcatEmbeddedServletContainerFactory subclass.

For example:

TomcatEmbeddedServletContainerFactory tomcat = new TomcatEmbeddedServletContainerFactory() {
    @Override
    protected void postProcessContext(Context context) {
        SecurityConstraint securityConstraint = new SecurityConstraint();
        securityConstraint.setUserConstraint("CONFIDENTIAL");
        SecurityCollection collection = new SecurityCollection();
        collection.addPattern("/*");
        securityConstraint.addCollection(collection);
        context.addConstraint(securityConstraint);
    }
};

Due to CONFIDENTIAL and /*, this will cause Tomcat to redirect every request to HTTPS. You can configure multiple patterns and multiple constraints if you need more control over what is and is not redirected.

An instance of the above TomcatEmbeddedServletContainerFactory subclass should be defined as a bean using a @Bean method in a @Configuration class.

Spring Boot Security using http instead of https when forwarding to login page

You should configure the ALB to terminate SSL (i.e. register certificate etc). If this is configured correctly, the ALB will automatically add a header (X-Forwarded-Proto) that tells Spring Security that it needs to use HTTPS for its redirects.

Redirect from http to https in Spring Boot 2.0.4

Try with below configurations.

@Bean
public ServletWebServerFactory servletContainer() {
    TomcatServletWebServerFactory tomcat = new TomcatServletWebServerFactory() {
        @Override
        protected void postProcessContext(Context context) {
            SecurityConstraint securityConstraint = new SecurityConstraint();
            securityConstraint.setUserConstraint("CONFIDENTIAL");
            SecurityCollection collection = new SecurityCollection();
            collection.addPattern("/*");
            securityConstraint.addCollection(collection);
            context.addConstraint(securityConstraint);
        }
    };
    tomcat.addAdditionalTomcatConnectors(redirectConnector());
    return tomcat;
}

private Connector redirectConnector() {
    Connector connector = new Connector(
            TomcatServletWebServerFactory.DEFAULT_PROTOCOL);
    connector.setScheme("http");
    connector.setPort(8080);
    connector.setSecure(false);
    connector.setRedirectPort(8443);
    return connector;
}

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