Spring Cloud Gateway - Customized Web Client

Run the Sample

• Build the sample → gradlew clean build

• Run UAA Server → gradlew -b uaa-server/build.gradle uaa

• Run Gateway → gradlew -b gateway/build.gradle bootRun

• Go to http://localhost:8080 and login to UAA using user1/password

When you hit URL, http://localhost:8080/, the gateway will go through OAuth2 flow and finally show Test OK page. See the logs in Gateway project sample.log, you will find line

r.n.resources.PooledConnectionProvider : [id: 0xe15dddf3, L:/127.0.0.1:62231 - R:localhost/127.0.0.1:8090] onStateChange(POST{uri=/uaa/oauth/token, connection=PooledConnection …​

That means the customization on WebClient used by Spring Security does not take effective on the reactor.netty.http.client.HttpClientConnect as it still use Pool.