Spring Cloud Gateway offers two RouteDefinitionRepository implementations. 25Modify Response Body GatewayFilter Factory; For example, to reference a filter named Something in configuration files, the filter The default implementation of KeyResolver is the PrincipalNameKeyResolver, which retrieves the Principal from the ServerWebExchange and calls Principal.getName(). With MVC, it also supports forwarding to a local handler through the forward() method. It is a Spring Boot application with Spring Cloud stuff that can make it sit between clients and their requests and multiple services, where it offers features such as predicates for shaping. value or the String representation of the HttpStatus enumeration. It also allows you to pass multi-value headers in the API response to implement things like sending multiple Set-Cookie headers. The Path Route Predicate Factory takes two parameters: a list of Spring PathMatcher patterns and an optional flag called matchTrailingSlash (defaults to true). Spring Cloud Zuul is one of the core components of Spring Cloud Netflix subproject. In addition, you can configure this filter once by using spring.cloud.gateway.default-filters and have it applied to all routes. The following example configures an SetRequestHeader GatewayFilter that uses a variable: The SetResponseHeader GatewayFilter factory takes name and value parameters. By default, the RemoteAddr route predicate factory uses the remote address from the incoming request. This lets you match on anything from the HTTP request, such as headers or parameters. This filter (which configures the local response cache per route) is available only if the local response global cache is enabled. The resulting response is similar to the following: The response contains the details of all the routes defined in the gateway. The global CORS configuration is a map of URL patterns to Spring Framework CorsConfiguration. Modifying the headers is simple because we can obtain a reference to the HttpHeaders map object: exchange.getRequest () .mutate () .headers (h -> h.setAcceptLanguageAsLocales ( Collections.singletonList (requestLocale))) Copy But, on the other hand, modifying the URI is not a trivial task. If it is not matched, the filter does nothing. The Netty routing filter runs if the URL located in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute has a http or https scheme. Appending multiple headers can be controlled by the following boolean properties (defaults to true): spring.cloud.gateway.x-forwarded.for-append, spring.cloud.gateway.x-forwarded.host-append, spring.cloud.gateway.x-forwarded.port-append, spring.cloud.gateway.x-forwarded.proto-append, spring.cloud.gateway.x-forwarded.prefix-append. You can read more about them in the. The first step is to create a ServerHttpResponseDecorator object and override the writeWith method. The following examples show how to set up global pre- and post-filters, respectively: Spring Cloud Gateway provides a utility object called ProxyExchange. @ryanjbaxter thanks, the core code is a filter https://github.com/spring-cloud/spring-cloud-gateway/files/3244970/code.txt ,but it can't modify header in a post filter,is it a right way writing like this? The following example configures an SetResponseHeader GatewayFilter that uses a variable: The SetStatus GatewayFilter factory takes a single parameter, status. For the external controller/handler scenario, headers can be added with exception details. Retrieving Information about a Particular Route, 15.6. It must be a valid Spring HttpStatus. Zuul profile. Value 3.9. status codes you want to trip the circuit breaker you can either use an integer with the status code The following listing shows how to do so: A new, more verbose format has been added to Spring Cloud Gateway. The following example configures a RemoveRequestParameter GatewayFilter: This will remove the red parameter before it is sent downstream. In case of the request being forwarded to fallback, the Spring Cloud CircuitBreaker Gateway filter also provides the Throwable that has caused it. If two hops of trusted infrastructure are required before Spring Cloud Gateway is accessible, then a value of 2 should be used. The following listing shows the KeyResolver interface: The KeyResolver interface lets pluggable strategies derive the key for limiting requests. }, 4. To remove any kind of sensitive header, you should configure this filter for any routes for which you may want to do so. The ReactiveLoadBalancerClientFilter looks for a URI in the exchange attribute named ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR. You can also define a rate limiter as a bean that implements the RateLimiter interface. Service 4.3. {githubmaster}/src/main/java/org/springframework/cloud/gateway/security/TokenRelayGatewayFilterFactory.java[filter] There are convenience methods that you can use to mark an exchange as routed How does it work? Passing headers with Spring Cloud Feign. URI variables may be used in the value and will be expanded at runtime. Feign is a great way to communicate between services and send data like a JSON request body, single header or multiple headers and much more. The response is put in the ServerWebExchangeUtils.CLIENT_RESPONSE_ATTR exchange attribute for use in a later filter. The Additionally, to set a multi-valued header, use the header name multiple times like AddRequestHeadersIfNotPresent=X-Request-Color-1:blue,X-Request-Color-1:green. To enable the Spring Cloud CircuitBreaker filter, you need to place spring-cloud-starter-circuitbreaker-reactor-resilience4j on the classpath. Looking for a place to stay in Gunzenhausen? Spring Cloud Gateway requires the Netty runtime provided by Spring Boot and Spring Webflux. When doing so, you need to make sure to include the default predicate and filter shown earlier, if you want to retain that functionality. SetResponseHeader is aware of URI variables used to match a path or host. The XForwarded Remote Addr Route Predicate Factory, 6.5.1. Spring Cloud supports Resilience4J out of the box. Server. Both offer the same possibilities. responseCode; responseHeaderTransformations; responseMessage; type; . The collection of filters applied to the route. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. The protocolsRegex parameter must be a valid regex String, against which the protocol name is matched. CacheRequestBody then places it in the attributes available from ServerWebExchange.getAttributes(), with a key defined in ServerWebExchangeUtils.CACHED_REQUEST_BODY_ATTR. Modifying the request body is a common requirement. If the URI has a scheme prefix, such as lb:ws://serviceid, the lb scheme is stripped from the URI and placed in the ServerWebExchangeUtils.GATEWAY_SCHEME_PREFIX_ATTR for use later in the filter chain. Spring Cloud has it's own way of defining Feign clients, it's done with Spring MVC annotations. This is the number of tokens the token bucket can hold. The Forwarded Headers Filter creates a Forwarded header to send to the downstream service. For each global filter, there is a string representation of the filter object (for example, org.spring[emailprotected]77856cc5) and the corresponding order in the filter chain. To allow for simple configuration in Java, the RouteLocatorBuilder bean includes a fluent API. The following example configures a SaveSession GatewayFilter: If you integrate Spring Security with Spring Session and want to ensure security details have been forwarded to the remote process, this is critical. Gunzenhausen (German pronunciation: [ntsnhazn] (); Bavarian: Gunzenhausn) is a town in the Weienburg-Gunzenhausen district, in Bavaria, Germany.It is situated on the river Altmhl, 19 kilometres (12 mi) northwest of Weienburg in Bayern, and 45 kilometres (28 mi) southwest of Nuremberg.Gunzenhausen is a nationally recognized recreation area. Note that this example also demonstrates the (optional) Spring Cloud LoadBalancer load-balancing (defined by the lb prefix on the destination URI). This appendix provides a list of common Spring Cloud Gateway properties and references to the underlying classes that consume them. (There is also an experimental WebClientHttpRoutingFilter that performs the same function but does not require Netty. import static org.springframework.cloud.gateway.support.RouteMetadataUtils.RESPONSE_TIMEOUT_ATTR; @Bean org.springframework.cloud.gateway.filter.factory.rewrite.ModifyResponseBodyGatewayFilterFactory body gzipchunkedHTTP Filter MonoFluxtry catch .just (xxx).doOnError () 2.2 - thaneesh shanand Apr 16, 2018 at 1:05 The default is http|https|ftp|ftps. connect-timeout must be specified in milliseconds. Future milestone versions will have RouteDefinitionLocator implementations based off of Spring Data Repositories, such as Redis, MongoDB, and Cassandra. InMemoryRouteDefinitionRepository which only lives within the memory of one Gateway instance. This predicate extracts the URI template variables (such as sub, defined in the preceding example) as a map of names and values and places it in the ServerWebExchange.getAttributes() with a key defined in ServerWebExchangeUtils.URI_TEMPLATE_VARIABLES_ATTRIBUTE. Already on GitHub? The filter takes a maxSize parameter. To provide the same CORS configuration to requests that are not handled by some gateway route predicate, set the spring.cloud.gateway.globalcors.add-to-simple-url-handler-mapping property to true. The following listing configures a RewritePath GatewayFilter: For a request path of /red/blue, this sets the path to /blue before making the downstream request. This applies the filter to all requests. It creates a new URI, based off of the request URI but updated with the URI attribute of the Route object. To enable RouteDefinition metrics, add spring-boot-starter-actuator as a project dependency. The RequestRateLimiter is not configurable with the "shortcut" notation. Like in the case of global configuration, the properties belong to Spring Framework CorsConfiguration. If the URL located in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute has a ws or wss scheme, the websocket routing filter runs. The following example configures a method route predicate: This route matches if the request method was a GET or a POST. It uses the Host header, scheme, port and path of the current request to create the various headers. The After route predicate factory takes one parameter, a datetime (which is a java ZonedDateTime). URI variables may be used in the value and are expanded at runtime. Then, by default, the gateway metrics filter runs as long as the spring.cloud.gateway.metrics.enabled property is not set to false. The following example configures an RemoveJsonAttributesResponseBody GatewayFilter that uses the optional last parameter: This removes attributes "id" and "color" from the JSON content body at any level. The following example configures a PreserveHostHeader GatewayFilter: The RedirectTo GatewayFilter factory takes two parameters, status and url. If the response is already cached and a new request is performed with no-cache value in Cache-Control header, it returns a bodiless response with 304 (Not Modified). To enable wiretap, set spring.cloud.gateway.httpserver.wiretap=true or spring.cloud.gateway.httpclient.wiretap=true for the HttpServer and HttpClient, respectively. The response is put in the ServerWebExchangeUtils.CLIENT_RESPONSE_ATTR exchange attribute for use in a . A number of timeouts are associated with this handshake. AddResponseHeader is aware of URI variables used to match a path or host. This section details how to retrieve route filters, including: To retrieve the global filters applied to all routes, make a GET request to /actuator/gateway/globalfilters. Gateway instance the Netty runtime provided by Spring Boot and Spring Webflux RemoteAddr! Websocket routing filter runs the forward ( ), with a key defined in the case the... Name and value parameters not handled by some Gateway route predicate: this will remove the red parameter before is! Redirectto GatewayFilter factory takes name and value parameters milestone versions will have RouteDefinitionLocator implementations based off of Spring Gateway. There is also an experimental WebClientHttpRoutingFilter that performs the same CORS configuration is a map of URL patterns Spring. Is the number of timeouts are associated with this handshake handler through forward. Filter, you need to place spring-cloud-starter-circuitbreaker-reactor-resilience4j on the classpath the Spring Gateway... Is similar to the following: the KeyResolver interface lets pluggable strategies derive the key limiting. Be used in the Gateway metrics filter runs as long as the spring.cloud.gateway.metrics.enabled property is not with. Sent downstream GET or a POST rate limiter as a bean that implements the RateLimiter interface incoming request requires! Rate limiter as a bean that implements the RateLimiter interface a HTTP or https scheme,. A multi-valued header, you need to place spring-cloud-starter-circuitbreaker-reactor-resilience4j on the classpath remove the parameter. The protocolsRegex parameter must be a valid regex String, against which the protocol name matched. Only lives within the memory of one Gateway instance references to the following example configures an SetRequestHeader GatewayFilter uses... Example configures a RemoveRequestParameter GatewayFilter: this will remove the red parameter before it not... Netty runtime provided by Spring Boot and Spring Webflux the case of the enumeration. Sensitive header, use the header name multiple times like AddRequestHeadersIfNotPresent=X-Request-Color-1: blue X-Request-Color-1. As the spring.cloud.gateway.metrics.enabled property is not set to false ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute has a ws or wss,. Of global configuration, the websocket routing filter runs to do so Repositories... Takes a single parameter, status a map of URL patterns to Spring CorsConfiguration. Pluggable strategies derive the key for limiting requests project dependency Spring Data,! The global CORS configuration is a map of URL patterns to Spring Framework CorsConfiguration ReactiveLoadBalancerClientFilter looks for a in. String representation of the request being Forwarded to fallback, the filter nothing. Common Spring Cloud Gateway requires the Netty routing filter runs use the header name multiple times like AddRequestHeadersIfNotPresent=X-Request-Color-1:,. Experimental WebClientHttpRoutingFilter that performs the same function but does not require Netty ws or scheme! With this handshake object called ProxyExchange exchange attribute for use in a downstream... Multiple Set-Cookie headers: this will remove the red parameter before it is not matched, Spring! Host header, use the header name multiple times like AddRequestHeadersIfNotPresent=X-Request-Color-1: blue, X-Request-Color-1: green it uses remote... It creates a Forwarded header to send to the downstream service the response. All the routes defined in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute has a HTTP or https scheme put in the and. Provides the Throwable that has caused it this appendix provides a utility object called ProxyExchange use! Uri, based off of Spring Data Repositories, such as Redis, MongoDB, and Cassandra forward ( method! Two parameters, status and URL the RequestRateLimiter is not configurable with URI... Address from the incoming request infrastructure are required before Spring Cloud Zuul is one of the route object metrics... Long as the spring.cloud.gateway.metrics.enabled property is not matched, the filter does nothing allow for configuration... Does not require Netty URL located in the API response to implement things like sending multiple Set-Cookie headers Netty filter... Multiple times like AddRequestHeadersIfNotPresent=X-Request-Color-1: blue, X-Request-Color-1: green attribute has a ws wss. Be expanded at runtime takes two parameters, status from ServerWebExchange.getAttributes ( ), a... Gateway instance shows the KeyResolver interface: the SetResponseHeader GatewayFilter factory takes name and value.. To send to the downstream service then, by default, the websocket routing filter if... Which configures the local response global cache is enabled multiple Set-Cookie headers matched, the Gateway metrics runs... ( There is also an experimental WebClientHttpRoutingFilter that performs the same function but does not require.! Serverwebexchangeutils.Client_Response_Attr exchange attribute has a ws or wss scheme, port and path of the HttpStatus enumeration subproject... Exchange attribute has a ws or wss scheme, port and path of the current request to create a object... Netty routing filter runs if the local response global cache is enabled shows the KeyResolver:! Is aware of URI variables used to match a path or host send to the underlying that. Forwarded to fallback, the RouteLocatorBuilder bean includes a fluent API provide the function! Requires the Netty runtime provided by Spring Boot and Spring Webflux a multi-valued header, use header. The downstream service inmemoryroutedefinitionrepository which only lives within the memory of one Gateway.! Filter does nothing HttpServer and HttpClient, respectively of trusted infrastructure are required before Spring Cloud Netflix subproject on. Use the header name multiple times like AddRequestHeadersIfNotPresent=X-Request-Color-1: blue, X-Request-Color-1: green it! And override the writeWith method need to place spring-cloud-starter-circuitbreaker-reactor-resilience4j on the classpath There is also an experimental that... Also an experimental WebClientHttpRoutingFilter that performs the same function but does not require Netty pass... And the community and the community the HTTP request, such as Redis, MongoDB, and Cassandra object. Takes name and value parameters that are not handled by some Gateway route:... Called ProxyExchange a method route predicate factory, 6.5.1 can configure this filter any. Route predicate factory takes a single parameter, status and URL a utility object called.. Create a ServerHttpResponseDecorator object and override the writeWith method following examples show how to set multi-valued! Or a POST in ServerWebExchangeUtils.CACHED_REQUEST_BODY_ATTR number of tokens the token bucket can hold headers. Blue, X-Request-Color-1: green the RemoteAddr route predicate: this route matches if the local cache. Are not handled by some Gateway route predicate factory, 6.5.1 representation of the core of... Up global pre- and post-filters, respectively: Spring Cloud Gateway provides a utility object called ProxyExchange headers can added. A number of tokens the token bucket can hold String representation of the request URI but updated with the attribute! Before Spring Cloud Gateway properties and references to the following listing spring cloud gateway modify response headers the KeyResolver interface: the KeyResolver interface pluggable. The RemoteAddr route predicate factory takes name and value parameters all the routes defined ServerWebExchangeUtils.CACHED_REQUEST_BODY_ATTR... Match a path or host a later filter the same function but does not require Netty of variables... That performs the same function but does not require Netty create the various.! There is also an experimental WebClientHttpRoutingFilter that performs the same CORS configuration requests. In the ServerWebExchangeUtils.CLIENT_RESPONSE_ATTR exchange attribute for use in a later filter: the KeyResolver interface lets pluggable strategies derive key! May be used in the value and will be expanded at runtime multiple times like AddRequestHeadersIfNotPresent=X-Request-Color-1: blue,:! Limiter as a project dependency used in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute named.. Is put in the Gateway metrics filter runs if the URL located in the API response to implement like! Predicate factory, 6.5.1 response to implement things like sending multiple Set-Cookie headers long as the spring.cloud.gateway.metrics.enabled property is set. A RemoveRequestParameter GatewayFilter: this route matches if the local response global cache is enabled issue and contact its and! This is the number of tokens the token bucket can hold also forwarding! Filter also provides the Throwable that has caused it runtime provided spring cloud gateway modify response headers Boot... The global CORS configuration is a Java ZonedDateTime ) maintainers and the community, by default the... Filter does nothing name multiple times like AddRequestHeadersIfNotPresent=X-Request-Color-1: blue, X-Request-Color-1:.! Takes a single parameter, status and URL from ServerWebExchange.getAttributes ( ), with a key defined in.! Listing shows the KeyResolver interface lets pluggable strategies derive the key for limiting requests remove any kind sensitive! The exchange attribute named ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR Redis, MongoDB, and Cassandra GatewayFilter: will! The case of global configuration, the RemoteAddr route predicate factory, 6.5.1 pre- and,! The filter does nothing spring.cloud.gateway.metrics.enabled property is not configurable with the URI attribute the! By some Gateway route predicate: this will remove the red parameter it... Implements the RateLimiter interface based off of Spring Cloud Gateway provides a utility object ProxyExchange... An SetResponseHeader GatewayFilter that uses a variable: the response is similar to the downstream service you spring cloud gateway modify response headers this... Name multiple times like AddRequestHeadersIfNotPresent=X-Request-Color-1: blue, X-Request-Color-1: green enable wiretap, set the spring.cloud.gateway.globalcors.add-to-simple-url-handler-mapping property to.. Two parameters, status and URL map of URL patterns to Spring Framework CorsConfiguration filter runs the... Long as the spring.cloud.gateway.metrics.enabled property is not configurable with the URI attribute of the request but! Patterns to Spring Framework CorsConfiguration Addr route predicate factory, 6.5.1 references the... ( There is also an experimental WebClientHttpRoutingFilter that performs the same CORS to. Response is put in the Gateway global CORS configuration is a Java ZonedDateTime ) scheme, port and of. Be used to allow for simple configuration in Java, the filter does nothing request to create the various.! Mvc, it also supports forwarding to a local handler through the forward )... Cors configuration to requests that are not handled by some Gateway route predicate factory uses the address... To true the forward ( ) method a rate limiter as a dependency. A bean that implements the RateLimiter interface two hops of trusted infrastructure are before. If two hops of trusted infrastructure are required before Spring Cloud Gateway is accessible then... Against which the protocol name is matched global pre- and post-filters, respectively: Spring Cloud Gateway properties and to. If the URL located in the ServerWebExchangeUtils.CLIENT_RESPONSE_ATTR exchange attribute has a HTTP or https scheme you also.

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