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spring-cloudnetflix-zuul

How do you create custom zuul filters in spring cloud

I want to write some of my own custom zuul filters for a spring cloud microservice i am writing. Once i have the filter written how do I integrate it so the underlying netflix zuul framework can take advantage of it.

Solution

  • Create a @Bean that extends ZuulFilter. See java configuration examples here. As long as the bean is in the same context as the @EnableZuulProxy app, it will automatically get picked up.

    @Bean
public MyFilter myFilter() {
    return new MyFilter();
}

    See examples of filters here.

    public class MyFilter extends ZuulFilter {
    //...
}

    There are three types of filters: pre, route and post and each set of filters is executed in that order (ie all pre's first, routes 2nd and post's 3rd).