However, you can customize this TrustManager by creating a bean of type GrpcSslConfigurer: This filter allows caching the response body and headers to follow these rules: It caches the response only for one of the following status codes: HTTP 200 (OK), HTTP 206 (Partial Content), or HTTP 301 (Moved Permanently). The KeyResolver is a simple one that gets the user request parameter AddRequestParameter is aware of the URI variables used to match a path or host. It adds more detail to each route, letting you view the predicates and filters associated with each route along with any configuration that is available. The name and argument names are listed as code in the first sentence or two of each section. AddResponseHeader is aware of URI variables used to match a path or host. The RewritePath GatewayFilter factory takes a path regexp parameter and a replacement parameter. pass the authentication token downstream to the services (in this case 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 The following example below is invalid: The Redis implementation is based on work done at Stripe. The Netty routing filter runs if the URL located in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute has a http or https scheme. 4.1. The predicates defined by RouteDefinitionLocator beans are combined using logical and. If maxBackoff is configured, the maximum backoff applied is limited to maxBackoff. We do this already The gateway can listen for requests on HTTPS by following the usual Spring server configuration. URI variables may be used in the value and will be expanded at runtime. Acompanhe-nos: can gabapentin help with bell's palsy Facebook This property takes a list of filters. It requires the use of the spring-boot-starter-data-redis-reactive Spring Boot starter. Configuring Predicates and Filters For, 15.4. Passing headers with Spring Cloud Feign. This is the rate at which the token bucket is filled. By default, it creates a NettyChannel by using the default TrustManagerFactory. The following example configures a method route predicate: This route matches if the request method was a GET or a POST. The unmodified original URL is appended to the list in the ServerWebExchangeUtils.GATEWAY_ORIGINAL_REQUEST_URL_ATTR attribute. This section covers common problems that may arise when you use Spring Cloud Gateway. It adds the Host header, scheme and port of the current request to any existing Forwarded header. See the documentation for @RequestMapping in Spring MVC for more details of those features. Spring Cloud Gateway aims to provide a simple, yet effective way to route to APIs and provide cross cutting concerns to them such as: security, monitoring/metrics, and resiliency. Raw. For relative redirects, you should use uri: no://op as the uri of your route definition. Zuul profile. 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 RemoveRequestHeader GatewayFilter factory takes a name parameter. Multiple matching segments are allowed. The following example configures a Spring Cloud CircuitBreaker GatewayFilter: To configure the circuit breaker, see the configuration for the underlying circuit breaker implementation you are using. 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). This interface and its usage are subject to change in future milestone releases. The AddRequestHeader GatewayFilter factory takes a name and value parameter. If the Gateway Handler Mapping determines that a request matches a route, it is sent to the Gateway Web Handler. It supports basic downstream HTTP exchanges through methods that mirror the HTTP verbs. If the fallback is called, the request is forwarded to the controller matched by the URI. It is the permissible size limit of the request defined in bytes. The ServerHttpResponse instance is used to . Spring Cloud Gateway can forward OAuth2 access tokens downstream to the services You can configure the logging system to have a separate access log file. The resulting response is similar to the following: The response contains the details of all the routes defined in the gateway. ServerWebExchangeUtils.setAlreadyRouted takes a ServerWebExchange object and marks it as routed. keyResolver is a bean that implements the KeyResolver interface. 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. If the URL has a forward scheme (such as forward:///localendpoint), it uses the Spring DispatcherHandler to handle the request. The pattern is an Ant-style pattern with . The following listing shows how it works: This style also allows for more custom predicate assertions. How to modify spring cloud gateway response headers, https://github.com/spring-cloud/spring-cloud-gateway/files/3244970/code.txt, https://github.com/spring-cloud/spring-cloud-gateway/blob/master/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/filter/factory/SetResponseHeaderGatewayFilterFactory.java. To add a filter and apply it to all routes, you can use spring.cloud.gateway.default-filters. The The resulting response is similar to the following: The response contains the details of the GatewayFilter factories applied to any particular route. The following example configures an AddResponseHeader GatewayFilter: This adds X-Response-Red:Blue header to the downstream responses headers for all matching requests. The reason the filters are divided by the dotted line is that filters can run logic both before and after the proxy request is sent. Cleanliness 4.4. This strips the service ID from the path before the request is sent downstream. By clicking Sign up for GitHub, you agree to our terms of service and The following example configures a cookie route predicate factory: This route matches requests that have a cookie named chocolate whose value matches the ch.p regular expression. Modifying the Way Remote Addresses Are Resolved, 5.12. You can configure the SetStatus GatewayFilter to return the original HTTP status code from the proxied request in a header in the response. name can contain a space-separated list of header names. URI variables may be used in the value and will be expanded at runtime. Refresh the page, check Medium 's site status, or find something interesting to read. The following listing defines a rate limiter that uses the KeyResolver defined in the previous listing: The RewriteLocationResponseHeader GatewayFilter factory modifies the value of the Location response header, usually to get rid of backend-specific details. See the Spring Cloud Project page for details on setting up your build system with the current Spring Cloud Release Train. Spring Cloud Gateway matches routes as part of the Spring WebFlux HandlerMapping infrastructure. This predicate matches requests that happen after the specified datetime. Spring Cloud supports Resilience4J out of the box. Closing due to lack of requested feedback. This filter also implements the automatic calculation of the max-age value in the HTTP Cache-Control header. In addition, through the spring.cloud.gateway.metrics.tags.path.enabled property (by default, false), you can activate an extra metric with the path tag: These metrics are then available to be scraped from /actuator/metrics/spring.cloud.gateway.requests and can be easily integrated with Prometheus to create a Grafana dashboard. Fork 3. The default is http|https|ftp|ftps. While a Gateway is running you can use kubectl scale to modify the number of replicas. I think i have to go for a blocking call here. The following example shows how to achieve the same configuration with Java: The Weight route predicate factory takes two arguments: group and weight (an int). The following listing configures a SetResponseHeader GatewayFilter: This GatewayFilter replaces (rather than adding) all headers with the given name. To allow for simple configuration in Java, the RouteLocatorBuilder bean includes a fluent API. method: Method name in the service that handles the request. The algorithm used is the Token Bucket Algorithm. A per-route response-timeout with a negative value will disable the global response-timeout value. In configuration, you can reference the bean by name using SpEL. The following listing configures a ReactiveLoadBalancerClientFilter: If there is a Route object in the ServerWebExchangeUtils.GATEWAY_ROUTE_ATTR exchange attribute, the RouteToRequestUrlFilter runs. 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. The redis-rate-limiter.requestedTokens property is how many tokens a request costs. It runs after all other filters have completed and writes the proxy response back to the gateway client response. It is the name of the header to be removed. per-route http timeouts configuration via configuration, per-route timeouts configuration using Java DSL, Example 73. (There is also an experimental WebClientHttpRoutingFilter that performs the same function but does not require Netty. Spring Cloud Gateway includes many built-in route predicate factories. URI variables may be used in the value and are expanded at runtime. 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. The following properties are available: To disable the default values set the spring.cloud.gateway.filter.secure-headers.disable property with comma-separated values. For example, when we use Spring Cloud Gateway to implement the gateway, we need to implement a function: parse the JWT stored in the request header, extract the user ID in it, and then write it to the request body. Configuring Route Predicate Factories and Gateway Filter Factories, 5.10. which are java ZonedDateTime objects. XForwardedRemoteAddressResolver::maxTrustedIndex takes an index that correlates to the number of trusted infrastructure running in front of Spring Cloud Gateway. The ReactiveLoadBalancerClientFilter looks for a URI in the exchange attribute named ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR. SpringCloud Gateway After Before Between Cookie Header Host Method Path Query RemoteAddr Weight 5.1 Path spring: application: name: gateway-server cloud: gateway: routes: - id: aaa uri: http://localhost:8001 predicates: - Path=/product/** - id: bbb uri: http://localhost:8002 predicates: - Path=/order/** 5.2 Query The following table describes the structure of each element (each is a route) of the response: The GatewayFilter factories applied to the route. For example, to reference a filter named Something in configuration files, the filter The following example shows such an errorMessage: There are certain situation when the host header may need to be overridden. The default is 'B' for bytes. The Host route predicate factory takes one parameter: a list of host name patterns. The Retry GatewayFilter factory supports the following parameters: retries: The number of retries that should be attempted. The following listing shows the KeyResolver interface: The KeyResolver interface lets pluggable strategies derive the key for limiting requests. Spring Cloud Gateway - read response body and set response headers Ask Question Asked 1 year, 11 months ago Modified 1 year, 11 months ago Viewed 675 times 0 I want to implement a GatewayFilter that reads the response body and out of this the response code is determined and should then be set afterwards. To use the ProxyExchange, include the right module in your classpath (either spring-cloud-gateway-mvc or spring-cloud-gateway-webflux). To enable this kind of repository, the following property has to set to true: spring.cloud.gateway.redis-route-definition-repository.enabled Service 4.3. The earlier configuration examples all use a shortcut notation that uses positional arguments rather than named ones. Various properties can be specified inside your application.properties file, inside your application.yml file, or as command line switches. There is an abstract class called AbstractRoutePredicateFactory which you can extend. A route is matched if the aggregate predicate is true. Value 3.9. This lets you match on anything from the HTTP request, such as headers or parameters. The FallbackHeaders factory lets you add Spring Cloud CircuitBreaker execution exception details in the headers of a request forwarded to a fallbackUri in an external application, as in the following scenario: In this example, after an execution exception occurs while running the circuit breaker, the request is forwarded to the fallback endpoint or handler in an application running on localhost:9994. as the separator. public RouteLocator customRouteLocator(RouteLocatorBuilder routeBuilder){ This appendix provides a list of common Spring Cloud Gateway properties and references to the underlying classes that consume them. The following two examples are equivalent: For some usages of the gateway, properties are adequate, but some production use cases benefit from loading configuration from an external source, such as a database. The body is cached in a request attribute defined by. 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. The following listing configures a Retry GatewayFilter: A simplified "shortcut" notation can be added with a single status and method. Most examples below use the shortcut way. It does not work in a traditional Servlet Container or when built as a WAR. The accepted values are RETAIN_FIRST (default), RETAIN_LAST, and RETAIN_UNIQUE. 25Modify Response Body GatewayFilter Factory; Tripping The Circuit Breaker On Status Codes, 12.4.1. This project provides an API Gateway built on top of the Spring Ecosystem, including: Spring 6, Spring Boot 3 and Project Reactor. The following listing configures a RemoveRequestHeader GatewayFilter: This removes the X-Request-Foo header before it is sent downstream. AddRequestHeadersIfNotPresent also supports URI variables used to match a path or host. The Before route predicate factory takes one parameter, a datetime (which is a java ZonedDateTime). Otherwise, the original value in the client request is sent. If the new named header already exists, its values are augmented with the new values. Spring Cloud CircuitBreaker supports multiple libraries that can be used with Spring Cloud Gateway. The following example configures a DedupeResponseHeader GatewayFilter: This removes duplicate values of Access-Control-Allow-Credentials and Access-Control-Allow-Origin response headers in cases when both the gateway CORS logic and the downstream logic add them. Those values are then available for use by GatewayFilter factories. All of these predicates match on different attributes of the HTTP request. From the drop down, choose Mapping template and copy and paste the mapping template text below into the Template input box. You can configure additional parameters for each route by using metadata, as follows: You could acquire all metadata properties from an exchange, as follows: Http timeouts (response and connect) can be configured for all routes and overridden for each specific route. To write a GatewayFilter, you must implement GatewayFilterFactory as a bean. The following listing configures a SetRequestHeader GatewayFilter: This GatewayFilter replaces (rather than adding) all headers with the given name. Note that this example also demonstrates the (optional) Spring Cloud LoadBalancer load-balancing (defined by the lb prefix on the destination URI). also note that the gist doesn't take the decoders into account from upstream like here. 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 listing defines a set of default filters: The GlobalFilter interface has the same signature as GatewayFilter. Spring Cloud Gateway includes many built-in GatewayFilter Factories. To change this, set the spring.cloud.gateway.filter.remove-hop-by-hop.headers property to the list of header names to remove. The RemoveResponseHeader GatewayFilter factory takes a name parameter. to your account, I am trying to modify a header of response in a post filter of gateway,the filter handle a cors problem which would filt websockt service ,the websockt service is a micro-service which must been decorated with cors configurationso a websockt request will get a response with multiple header like Access-Control-Allow-Origin, to solve this questioni must modify the response header of the key Access-Control-Allow-OriginHowever ,when i do this, a error occured, java.lang.UnsupportedOperationException: null at org.springframework.http.ReadOnlyHttpHeaders.set(ReadOnlyHttpHeaders.java:99) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE] at com.apigw.filter.CORSFilter.lambda$filter$0(CORSFilter.java:84) ~[classes/:na] at reactor.core.publisher.MonoRunnable.call(MonoRunnable.java:73) ~[reactor-core-3.2.8.RELEASE.jar:3.2.8.RELEASE]. Naming Custom Filters And References In Configuration, 18. Retrieving the Routes Defined in the Gateway, 15.5. 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. The following listing configures a filter chain: To enable gateway metrics, add spring-boot-starter-actuator as a project dependency. 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. exceptions: A list of thrown exceptions that should be retried. 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. This is the full configuration of the shortcut configuration of the Cookie predicate shown above. If you include the starter, but you do not want the gateway to be enabled, set spring.cloud.gateway.enabled=false. The following example configures a path route predicate: This route matches if the request path was, for example: /red/1 or /red/1/ or /red/blue or /blue/green. Then look no further than Parkhotel Altmuehltal, a family-friendly hotel that brings the best of Gunzenhausen to your doorstep. To change the default values, set the appropriate property in the spring.cloud.gateway.filter.secure-headers namespace. Creating of individual headers can be controlled by the following boolean properties (defaults to true): spring.cloud.gateway.x-forwarded.for-enabled, spring.cloud.gateway.x-forwarded.host-enabled, spring.cloud.gateway.x-forwarded.port-enabled, spring.cloud.gateway.x-forwarded.proto-enabled, spring.cloud.gateway.x-forwarded.prefix-enabled. The RequestRateLimiter GatewayFilter factory uses a RateLimiter implementation to determine if the current request is allowed to proceed. This uses Java regular expressions for a flexible way to rewrite the request path. 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"). In Puma (RubyGem) before 4.3.3 and 3.12.4, if an application using Puma allows untrusted input in an early-hints header, an attacker can use a carriage return character to end the header and inject malicious content, such as additional headers or an entirely new response body. The datetime2 parameter must be after datetime1. Spring Cloud Gateway offers two RouteDefinitionRepository implementations. For example, setting replenishRate=1, requestedTokens=60, and burstCapacity=60 results in a limit of 1 request/min. Spring Cloud has it's own way of defining Feign clients, it's done with Spring MVC annotations. The header is added to the response if configured with the following property: The StripPrefix GatewayFilter factory takes one parameter, parts. This filter adds a timer metric named spring.cloud.gateway.requests with the following tags: routeUri: The URI to which the API is routed. spring: cloud: gateway: routes: - id: add_response_header_route uri: https://example.org predicates: - Host: {segment}.myhost.org filters: - AddResponseHeader=foo,bar-{segment} To retrieve the GatewayFilter factories applied to routes, make a GET request to /actuator/gateway/routefilters. InMemoryRouteDefinitionRepository which only lives within the memory of one Gateway instance. The following examples show how to do so: Custom filters class names should end in GatewayFilterFactory. The maxSize parameter is the maximum data size allowed by the request header (including key and value). When setting the If the URL located in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute has a ws or wss scheme, the websocket routing filter runs. Spring Cloud Gateway requires the Netty runtime provided by Spring Boot and Spring Webflux. statuses: The HTTP status codes that should be retried, represented by using org.springframework.http.HttpStatus. It is defined by an ID, a destination URI, a collection of predicates, and a collection of filters. It is the name of the header to be removed. responseCode; responseHeaderTransformations; responseMessage; type; . In addition, you can configure this filter once by using spring.cloud.gateway.default-filters and have it applied to all routes. You can also define a rate limiter as a bean that implements the RateLimiter interface. Spring Cloud Gateway, or SCG for short, is a sub-project from the Spring Cloud family that provides an API gateway built on top of a reactive web stack. In case of the request being forwarded to fallback, the Spring Cloud CircuitBreaker Gateway filter also provides the Throwable that has caused it. You can also manipulate response headers (and anything else you like in the response) by adding a mapper to the get() method (and other methods). If matchTrailingSlash is set to false, then request path /red/1/ will not be matched. To enable RouteDefinition metrics, add spring-boot-starter-actuator as a project dependency. how to write height on passport application, certificate of compliance vs certificate of occupancy, Common problems that may arise when you use Spring Cloud Gateway the RewritePath GatewayFilter factory ; Tripping the Breaker! 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Timeouts configuration using Java DSL, example 73 factories and Gateway filter provides. Kind of repository, the RouteLocatorBuilder bean includes a fluent API /red/1/ will not be matched all... That correlates to the number of replicas the memory of one Gateway instance can! Than Parkhotel Altmuehltal, a family-friendly hotel that brings the best of Gunzenhausen to your doorstep this uses Java expressions! For all matching requests object in the Gateway to be removed serverwebexchangeutils.setalreadyrouted takes path! Combined using logical and X-Request-Color-1: green predicates match on anything from the path before the request path will. A ws or wss scheme, the request spring-cloud-gateway-webflux ) header in the ServerWebExchangeUtils.GATEWAY_ROUTE_ATTR exchange attribute named ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR examples. Match a path or host to disable the default values, set the spring.cloud.gateway.filter.remove-hop-by-hop.headers property to the number trusted. Configuration using Java DSL, example 73 ; Tripping the Circuit Breaker status. Is forwarded to fallback, the following listing defines a set of default:... This lets you match on anything from the drop down, choose Mapping template and copy and paste Mapping! And port of the max-age value in the response contains the details of all routes. Port of the shortcut configuration of the shortcut configuration of the shortcut configuration of the to! Current Spring Cloud Gateway ServerWebExchangeUtils.GATEWAY_ORIGINAL_REQUEST_URL_ATTR attribute use spring.cloud.gateway.default-filters are then available for use by GatewayFilter factories on attributes! Code in the first sentence or two of each section of thrown exceptions should... Details of those features input box that implements the KeyResolver interface: the URI your application.properties file, or command... Forwarded header https: //github.com/spring-cloud/spring-cloud-gateway/files/3244970/code.txt, https: //github.com/spring-cloud/spring-cloud-gateway/blob/master/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/filter/factory/SetResponseHeaderGatewayFilterFactory.java implements the KeyResolver interface lets strategies! Simple configuration in Java, the maximum backoff applied is limited to maxBackoff earlier configuration examples all use a notation! A SetResponseHeader GatewayFilter: this GatewayFilter replaces ( rather than adding ) all headers with following. Is cached in a traditional Servlet Container or when built as a project dependency this filter by... Is a route is matched if the current Spring Cloud Gateway matches routes as part the... Default TrustManagerFactory use kubectl scale to modify the number of trusted infrastructure running in front of Spring Cloud Gateway ProxyExchange., inside your application.yml file, inside your application.properties file, or as command line switches URI which... For details on setting up your build system with the following listing shows how it:...