微服务⽹关Spring Cloud Gateway

超、凢脫俗 2024-04-18 21:37 55阅读 0赞

### 单块应⽤时代 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poYW9rZWppbjUyMQ_size_16_color_FFFFFF_t_70][]

### 单块+API时代 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poYW9rZWppbjUyMQ_size_16_color_FFFFFF_t_70 1][]

### 微服务？ ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poYW9rZWppbjUyMQ_size_16_color_FFFFFF_t_70 2][]

### 微服务+⽹关 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poYW9rZWppbjUyMQ_size_16_color_FFFFFF_t_70 3][]

### ⽹关职责 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poYW9rZWppbjUyMQ_size_16_color_FFFFFF_t_70 4][]

### 关于Zuul1 ###

基于blocking servlet API

不⽀持SSE或者WebSocket

路由灵活度⼀般

Netflix专有功能

### Spring Cloud Gateway ###

基于Spring, Reactor, Boot 2

⽀持基于配置或Java代码⽅式的灵活路由

路由⽀持path/host/header/parameters等

⽀持过滤器

https://cloud.spring.io/spring-cloud-gateway/spring-cloud-gateway.html

### 架构 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poYW9rZWppbjUyMQ_size_16_color_FFFFFF_t_70 5][]

### 简单过滤器 ###

@Slf4j
    public class SimpleFilter implements GatewayFilter {
    
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
     log.info("BEFORE");
     return chain.filter(exchange)
     .then(Mono.fromRunnable(() -> {
     log.info("AFTER");
     }));
     }
    }

### YAML配置 ###

spring:
     cloud:
      gateway:
       - id: foo_route
         uri: lb://foo
         predicates:
         - Host=**.foo.org
         - Path=/headers
         - Method=GET
         - Header=X-Request-Id, \d+
         - Query=foo, ba.
         - Query=baz
         - Cookie=chocolate, ch.p
         - After=1900-01-20T17:42:47.789-07:00[America/Denver]
         filters:
         - AddRequestHeader=X-Request-Foo, Bar
         - AddResponseHeader=X-Response-Foo, Bar
         - Hystrix=foo
         - SecureHeaders
         - RewritePath=/foo/(?<segment>.*), /$\{segment}

### Java配置 ###

@Bean
    public RouteLocator customRouteLocator(RouteLocatorBuilder builder,
     ThrottleGatewayFilterFactory throttle) {
     return builder.routes()
     .route(r -> r.host("**.abc.org").and().path("/image/png")
     .filters(f -> f.addResponseHeader("X-TestHeader", "foobar"))
     .uri("http://httpbin.org:80")
     )
     .route(r -> r.path("/image/webp")
     .filters(f -> f.addResponseHeader("X-AnotherHeader", "baz"))
     .uri("http://httpbin.org:80")
     )
     .route(r -> r.order(-1)
     .host("**.throttle.org").and().path("/get")
     .filters(f -> f.filter(throttle.apply(1, 1, 10,
     TimeUnit.SECONDS)))
     .uri("http://httpbin.org:80")
     )
     .build();
    }

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