Glossary

Route：网关的基本构建模块。它由 ID、目标 URI、一组谓词和一组过滤器定义。如果聚合谓词为真，则匹配路由。

Predicate：这是一个 link:https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/web/servlet/function/RequestPredicate.html[Spring WebMvc.fn RequestPredicate）。输入类型是 link:https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/web/servlet/function/ServerRequest.html[Spring WebMvc.fn ServerRequest）。这样您就可以匹配 HTTP 请求中的任何内容，例如标头或参数。

Filter：这些是 link:https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/web/servlet/function/HandlerFilterFunction.html[HandlerFilterFunction）的实例。在这里，您可以在发送下游请求之前或之后修改请求和响应。过滤器还可以实现 Function<ServerRequest, ServerRequest>，并且由 link:https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/web/servlet/function/HandlerFilterFunction.html#ofRequestProcessor(java.util.function.Function)[HandlerFilterFunction.ofRequestProcessor()）针对“之前”过滤器进行调整。对于“之后”过滤器，可以通过 link:https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/web/servlet/function/HandlerFilterFunction.html#ofResponseProcessor(java.util.function.BiFunction)[HandlerFilterFunction.ofResponseProcessor()）实现并调整 BiFunction<ServerRequest,T extends ServerResponse,R extends ServerResponse>。