Spring-cloud-gateway: Filter registration for custom filters

[pravinkumarb84]

I have written a custom filter implementing Gateway Filter. But this filter is not being applied to the request. How do i add this to the list of default filters. is there an option to do filter registration?

[spencergibb]

You need to implement GatewayFilterFactory and register it as a spring bean.

[pravinkumarb84]

Thanks. I am trying to implement CORS filter for all requests. I have implemented it as a custom filter with GatewayFilterFactory and register it as a spring bean. I have also implemented "Ordered" to give it highest precedence. But it is not getting applied. How to make this custom filter applied before all filters?

when i try a path in the routes, it navigates to the URI without the custom filter being applied.

My sample application.yml is as below:

spring:
application:
name: sample
cloud:
gateway:
routes:
- id: samplepath_route
uri: http://httpbin.org:80/
predicates:
- Path=/samplepath/

cors:
mappings:
/**:
allowedOrigins:
- localhost
- Ip address
allowedMethods:
- GET

[spencergibb]

Filters have to be applied to every route: see https://github.com/spring-cloud/spring-cloud-gateway/blob/2.0.x/docs/src/main/asciidoc/spring-cloud-gateway.adoc#addrequestparameter-gatewayfilter-factory

spring:
  cloud:
    gateway:
      routes:
      - id: add_request_header_route
        uri: http://example.org
        filters:
        - AddResponseHeader=X-Response-Foo, Bar

Is how to add a filter named AddResponseHeaderGatewayFilterFactory.

[spencergibb]

Please learn how to properly format code and logs.

[pravinkumarb84]

Thanks Spencer. I am able to implement the custom filter now.

[kentoj]

@pravinkumarb84 Did you get CORS support working? If so will you post an example?

[ckenley]

Please learn how to properly format code and logs.

Please learn some tact.

The documentation for custom filters outside of yaml config is nonexistent.