Setting 'relaxedQueryChars' for embedded Tomcat

Question

How can I set relaxedQueryChars for Spring Boot embedded Tomcat?

The connector attribute described here, but Spring Boot documentation has no such parameter listed.

How to set Tomcat's Connector attributes in general?

Answer 1

I am not sure if you can do this with properties file. I believe this should work

@Component
public class MyTomcatWebServerCustomizer
        implements WebServerFactoryCustomizer<TomcatServletWebServerFactory> {

    @Override
    public void customize(TomcatServletWebServerFactory factory) {
        factory.addConnectorCustomizers(new TomcatConnectorCustomizer() {
            @Override
            public void customize(Connector connector) {
                connector.setAttribute("relaxedQueryChars", "yourvaluehere");
            }
        });
    }
}

Answer 2

If you are using Spring Boot 2.x then you need to use WebSeerverFactoryCustomizer as given below.

@Bean
public WebServerFactoryCustomizer<TomcatServletWebServerFactory> 
    containerCustomizer(){
    return new EmbeddedTomcatCustomizer();
}

private static class EmbeddedTomcatCustomizer implements WebServerFactoryCustomizer<TomcatServletWebServerFactory> {

    @Override
    public void customize(TomcatServletWebServerFactory factory) {
        factory.addConnectorCustomizers((TomcatConnectorCustomizer) connector -> {
            connector.setAttribute("relaxedPathChars", "<>[\\]^`{|}");
            connector.setAttribute("relaxedQueryChars", "<>[\\]^`{|}");
        });
    }
}