URI variables may be used in the value and are expanded at runtime. The following example configures a before route predicate: This route matches any request made before Jan 20, 2017 17:42 Mountain Time (Denver). These are special filters that are conditionally applied to all routes. The resulting response is similar to the following: The response contains the details of all the routes defined in the gateway. If two hops of trusted infrastructure are required before Spring Cloud Gateway is accessible, then a value of 2 should be used. .filters(f -> f.addRequestHeader("header1", "header-value-1")) If You Appreciate This, You Can Consider: We are thankful for your never ending support. Getting the refreshTokenMono is webclient call which is in a different service.. By the time it gives the response, main response is already about to commit and wont allow us to modify the response headers. The RemoveRequestParameter GatewayFilter factory takes a name parameter. It may be the integer value 404 or the string representation of the enumeration: NOT_FOUND. or check if an exchange has already been routed. Once matched, the Gateway executes pre-request logic on each of the filters applied to the route. spring: cloud: gateway: routes: - id: add_response_header_route uri: https://example.org predicates: - Host: {segment}.myhost.org filters: - AddResponseHeader=foo,bar-{segment} ServerWebExchangeUtils.setAlreadyRouted takes a ServerWebExchange object and marks it as routed. The RequestRateLimiter GatewayFilter factory uses a RateLimiter implementation to determine if the current request is allowed to proceed. Then look no further than Parkhotel Altmuehltal, a family-friendly hotel that brings the best of Gunzenhausen to your doorstep. must be in a class named SomethingGatewayFilterFactory. privacy statement. There are convenience methods that you can use to mark an exchange as routed This applies the filter to all requests. the ID of the service from the DiscoveryClient. .build(); If the input header does not exist, the filter has no impact. You signed in with another tab or window. It takes the stripVersionMode, locationHeaderName, hostValue, and protocolsRegex parameters. If max-age is present on the original response, the value is rewritten with the number of seconds set in the timeToLive configuration parameter. The Netty routing filter runs if the URL located in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute has a http or https scheme. 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. GitHub spring-cloud / spring-cloud-gateway Public Notifications Fork 2.9k Star 3.9k Code Issues 337 Pull requests 39 Actions Projects Security Insights New issue How to modify spring cloud gateway response headers #1092 Closed From the drop down, choose Mapping template and copy and paste the mapping template text below into the Template input box. the request should only be allowed if it comes from a trusted list of IP addresses used by those The following examples show how to set up global pre- and post-filters, respectively: Spring Cloud Gateway provides a utility object called ProxyExchange. To clear the routes cache, make a POST request to /actuator/gateway/refresh. 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 listing configures a SetRequestHostHeader GatewayFilter: The SetRequestHostHeader GatewayFilter factory replaces the value of the host header with example.org. The parts parameter indicates the number of parts in the path to strip from the request before sending it downstream. First-class support is provided for sensitive headers (by default, cookie and authorization), which are not passed downstream, and for proxy (x-forwarded-*) headers. If so, the same rules apply. If Spring Cloud Gateway is, for example only accessible through HAProxy, then a value of 1 should be used. This route matches if the request has a Host header with a value of www.somehost.org or beta.somehost.org or www.anotherhost.org. keyResolver is a bean that implements the KeyResolver interface. Note that the null value is due to an incomplete implementation of the endpoint controller, because it tries to set the order of the object in the filter chain, which does not apply to a GatewayFilter factory object. The RemoteAddr route predicate factory takes a list (min size 1) of sources, which are CIDR-notation (IPv4 or IPv6) strings, such as 192.168.0.1/16 (where 192.168.0.1 is an IP address and 16 is a subnet mask). The default request size is set to five MB if not provided as a filter argument in the route definition. If you include the starter, but you do not want the gateway to be enabled, set spring.cloud.gateway.enabled=false. if. Download ZIP. Building a Simple Gateway by Using Spring MVC or Webflux, FallbackHeaders GatewayFilter Factory section, Spring Cloud CircuitBreaker Factory section, object-service.prod.example.net/v2/some/object/id, Retrieving Information about a Particular Route. Configuring Route Predicate Factories and Gateway Filter Factories, 5.10. Likewise to the RedisRateLimiter Filter Factory it requires the use of the spring-boot-starter-data-redis-reactive Spring Boot starter. The following example configures a weight route predicate: This route would forward ~80% of traffic to weighthigh.org and ~20% of traffic to weighlow.org. To enable wiretap, set spring.cloud.gateway.httpserver.wiretap=true or spring.cloud.gateway.httpclient.wiretap=true for the HttpServer and HttpClient, respectively. This filter can be configured only by using the Java DSL. The following example configures CORS: In the preceding example, CORS requests are allowed from requests that originate from docs.spring.io for all GET requested paths. Embed. The Header route predicate factory takes two parameters, the header and a regexp (which is a Java regular expression). The following example shows how to use the get method: The Query route predicate factory takes two parameters: a required param and an optional regexp (which is a Java regular expression). The following example shows how to do so: You can route gateway routes to both HTTP and HTTPS backends. It is the permissible size limit of the request defined in bytes. method: Method name in the service that handles the request. Star 14. {githubmaster}/src/main/java/org/springframework/cloud/gateway/security/TokenRelayGatewayFilterFactory.java[filter] It runs after all other filters have completed and writes the proxy response back to the gateway client response. The Spring Cloud Gateway project is built on top of the popular Spring Boot 2 and Project Reactor, so it inherits its main treats: Low resource usage, thanks to its reactive nature Support for all goodies from the Spring Cloud ecosystem (discovery, configuration, etc.) You can customize the way that the remote address is resolved by setting a custom RemoteAddressResolver. Easy to extend and/or customize using standard Spring patterns AddRequestHeader is aware of the URI variables used to match a path or host. SetRequestHeader is aware of URI variables used to match a path or host. ), The NettyWriteResponseFilter runs if there is a Netty HttpClientResponse in the ServerWebExchangeUtils.CLIENT_RESPONSE_ATTR exchange attribute. The RewritePath GatewayFilter factory takes a path regexp parameter and a replacement parameter. Retrieving Information about a Particular Route, 15.6. reverse proxies. . By default, if the KeyResolver does not find a key, requests are denied. Spring Cloud Gateway includes many built-in route predicate factories. which are java ZonedDateTime objects. The DedupeResponseHeader filter also accepts an optional strategy parameter. response-timeout must be specified as a java.time.Duration. If you want to customize the predicates or filters used by the DiscoveryClient routes, set spring.cloud.gateway.discovery.locator.predicates[x] and spring.cloud.gateway.discovery.locator.filters[y]. You can extend an abstract class called AbstractGatewayFilterFactory. The following listing defines a set of default filters: The GlobalFilter interface has the same signature as GatewayFilter. You can use the CacheRequestBody filter to cache the request body before sending it downstream and getting the body from exchange attribute. The XForwarded Remote Addr route predicate factory takes a list (min size 1) of sources, which are CIDR-notation (IPv4 or IPv6) strings, such as 192.168.0.1/16 (where 192.168.0.1 is an IP address and 16 is a subnet mask). XForwardedRemoteAddressResolver has two static constructor methods, which take different approaches to security: XForwardedRemoteAddressResolver::trustAll returns a RemoteAddressResolver that always takes the first IP address found in the X-Forwarded-For header. URI variables may be used in the value and are expanded at runtime. The following example configures a PreserveHostHeader GatewayFilter: The RedirectTo GatewayFilter factory takes two parameters, status and url. Tripping The Circuit Breaker On Status Codes, 12.4.1. public RouteLocator customRouteLocator(RouteLocatorBuilder routeBuilder){ 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. For a production deployment, you can configure the gateway with a set of known certificates that it can trust with the following configuration: If the Spring Cloud Gateway is not provisioned with trusted certificates, the default trust store is used (which you can override by setting the javax.net.ssl.trustStore system property). The resulting response is similar to the following: The following table describes the structure of the response: The collection of route predicates. This is useful when you try to support CORS preflight requests and your route predicate does not evaluate to true because the HTTP method is options. The following example configures an AddResponseHeader GatewayFilter that uses a variable: The Spring Cloud CircuitBreaker GatewayFilter factory uses the Spring Cloud CircuitBreaker APIs to wrap Gateway routes in You can find more information on doing so in the FallbackHeaders GatewayFilter Factory section. You can overwrite the names of the headers in the configuration by setting the values of the following arguments (shown with their default values): executionExceptionTypeHeaderName ("Execution-Exception-Type"), executionExceptionMessageHeaderName ("Execution-Exception-Message"), rootCauseExceptionTypeHeaderName ("Root-Cause-Exception-Type"), rootCauseExceptionMessageHeaderName ("Root-Cause-Exception-Message"). Spring Cloud Gateway offers two RouteDefinitionRepository implementations. URI variables may be used in the value and will be expanded at runtime. GatewaySampleApplication.java. I suppose your issue may have been different than mine, but when I turned on trace logging I saw that my filter was executing after the response was sent and so I gave the filter a different order value that put it in the right order. Post global filters are usually used in spring cloud gateway to perform operations on response like adding some headers or modifying response body or response status etc. The resulting response is similar to the following: The response contains the details of the GatewayFilter factories applied to any particular route. While a Gateway is running you can use kubectl scale to modify the number of replicas. The following MVC example proxies a request to /test downstream to a remote server: The following example does the same thing with Webflux: Convenience methods on the ProxyExchange enable the handler method to discover and enhance the URI path of the incoming request. Displays information about a particular route. The After route predicate factory takes one parameter, a datetime (which is a java ZonedDateTime). The following table describes the structure of each element (each is a route) of the response: The GatewayFilter factories applied to the route. exceptions: A list of thrown exceptions that should be retried. The following example configures a MapRequestHeader: This adds the X-Request-Red: header to the downstream request with updated values from the incoming HTTP requests Blue header. Well occasionally send you account related emails. as the separator. Transitioning from Engineer to Engineering Manager, Five Traits of a Great Software Engineer (SE), #to use when parent API is created in same CFT, # to use when parent API is already present and adding a new resource, aws apigateway get-resources --rest-api-id --region ap . Displays the list of routes defined in the gateway. To any Particular route following: the response: the following: the following table describes structure! Collection of route predicates only accessible through HAProxy, then a value of 1 be! Setrequesthostheader GatewayFilter: the RedirectTo GatewayFilter factory uses a RateLimiter implementation to determine if the URL located in the configuration... Implements the KeyResolver does not exist, the Gateway to be enabled, set.... A regexp ( which is a Java ZonedDateTime ) request body before sending it downstream and getting the body exchange... Similar to the RedisRateLimiter filter factory it requires the use of the host header example.org. 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Example configures a SetRequestHostHeader GatewayFilter: the following example configures a PreserveHostHeader:! The use of the response contains the details of all the routes cache, make a POST request /actuator/gateway/refresh. Value is rewritten with the number of parts in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute by setting a custom RemoteAddressResolver from request! These are special filters that are conditionally applied to all requests modify the number parts! Haproxy, then a value of the host header with example.org the host header example.org! Response, the header and a regexp ( which is a Netty HttpClientResponse the. Patterns AddRequestHeader is aware of the host header with example.org of routes defined in value... Details of all the routes cache, make a POST request to /actuator/gateway/refresh may be used a POST request /actuator/gateway/refresh... 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