NEVER_STRIP: The version is not stripped, even if the original request path contains no version. The following listing configures a filter chain: To enable gateway metrics, add spring-boot-starter-actuator as a project dependency. exceptions: A list of thrown exceptions that should be retried. 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 it is proxying. By default, the RemoteAddr route predicate factory uses the remote address from the incoming request. This is the rate at which the token bucket is filled. The RemoteAddr Route Predicate Factory, 5.10.1. This combined filter chain is sorted by the org.springframework.core.Ordered interface, which you can set by implementing the getOrder() method. Route filters are scoped to a particular route. 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. This allows more complex routing options, like forwarding sections of the original host or url path using PathPattern expression. To write a GatewayFilter, you must implement GatewayFilterFactory as a bean. Then look no further than Parkhotel Altmuehltal, a family-friendly hotel that brings the best of Gunzenhausen to your doorstep. The previous sample defines the Cookie Route Predicate Factory with two arguments, the cookie name, mycookie and the value to match mycookievalue. Spring Cloud Gateway includes many built-in route predicate factories. connect-timeout must be specified in milliseconds. It should be available as a GitHub (or similar) project or attached to this issue as a zip file. See the documentation for @RequestMapping in Spring MVC for more details of those features. 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, @ryanjbaxter it seems a route filter,can i modify a response header in a global post filter,thanks. .metadata(CONNECT_TIMEOUT_ATTR, 200); The RewritePath GatewayFilter factory takes a path regexp parameter and a replacement parameter. The following listing configures a SetRequestHostHeader GatewayFilter: The SetRequestHostHeader GatewayFilter factory replaces the value of the host header with example.org. Retrieving the Routes Defined in the Gateway, 15.5. The following diagram provides a high-level overview of how Spring Cloud Gateway works: Clients make requests to Spring Cloud Gateway. When using the retry filter with any HTTP method with a body, the body will be cached and the gateway will become memory constrained. 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. If you would like us to look at this issue, please provide the requested information and we will re-open the issue. .filters(f -> f.addRequestHeader("header1", "header-value-1")) This predicate matches cookies that have the given name and whose values match the regular expression. The response is put in the ServerWebExchangeUtils.CLIENT_RESPONSE_ATTR exchange attribute for use in a later filter. Sign in You can use the ModifyRequestBody filter to modify the request body before it is sent downstream by the gateway. You can extend an abstract class called AbstractGatewayFilterFactory. The pattern is an Ant-style pattern with . Since the request can be read only once, we need to cache the request body. To enable wiretap, set spring.cloud.gateway.httpserver.wiretap=true or spring.cloud.gateway.httpclient.wiretap=true for the HttpServer and HttpClient, respectively. The default implementation of KeyResolver is the PrincipalNameKeyResolver, which retrieves the Principal from the ServerWebExchange and calls Principal.getName(). You can configure Spring Cloud Gateway for Kubernetes to run multiple instances in High Availability as you would do with a normal Kubernetes resource. URIs defined in routes without a port get default port values of 80 and 443 for the HTTP and HTTPS URIs, respectively. In this situation, the SetRequestHostHeader GatewayFilter factory can replace the existing host header with a specified value. 2016-10-05: 4.3: CVE-2016-6426 CISCO 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. The following listing shows how to cache the request body GatewayFilter: CacheRequestBody extracts the request body and converts it to a body class (such as java.lang.String, defined in the preceding example). None of the prior documentation applies to what follows. Here is a link to someone asking about ordered filters that may provide more insight: #1341. Typically, there will be a name key and an args key. If max-age is present on the original response, the value is rewritten with the number of seconds set in the timeToLive configuration parameter. forwards the incoming token to outgoing resource requests. Spring Cloud Zuul is one of the core components of Spring Cloud Netflix subproject. The gateway can listen for requests on HTTPS by following the usual Spring server configuration. The filter takes a host parameter. import static org.springframework.cloud.gateway.support.RouteMetadataUtils.CONNECT_TIMEOUT_ATTR; A gauge metric named spring.cloud.gateway.routes.count will be added, whose value is the number of RouteDefinitions. This property takes a list of filters. In subsequent calls, this value is recalculated with the number of seconds left until the response expires. }, 4. The XForwarded Remote Addr Route Predicate Factory, 6.5.1. If the information is not provided within the next 7 days this issue will be closed. The RemoveRequestHeader GatewayFilter factory takes a name parameter. Otherwise, the original value in the client request is sent. 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. If it is not, a status of HTTP 429 - Too Many Requests (by default) is returned. must be in a class named SomethingGatewayFilterFactory. @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? You can also define a rate limiter as a bean that implements the RateLimiter interface. method: Method name in the service that handles the request. ServerHttpResponse interface. 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. Spring cloud gateway response body modification. 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. 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. Each item defines the name and the arguments of a given predicate. The KeyResolver is a simple one that gets the user request parameter The most noteworthy thing here is: ServerHttpRequest or HttpMessage interface provides a method to get the request headers HttpHeaders getHeaders(); returns a read-only instance, specifically of type ReadOnlyHttpHeaders, mentioned here more than once I wrote this blog post using Spring Cloud Gateway version Greenwich.SR1. 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. Closing due to lack of requested feedback. If two hops of trusted infrastructure are required before Spring Cloud Gateway is accessible, then a value of 2 should be used. The following example configures an AddResponseHeader GatewayFilter: This adds X-Response-Red:Blue header to the downstream responses headers for all matching requests. The following example configures a between route predicate: This route matches any request made after Jan 20, 2017 17:42 Mountain Time (Denver) and before Jan 21, 2017 17:42 Mountain Time (Denver). .application.yml. Most examples below use the shortcut way. The resulting response is similar to the following: The response contains the details of the global filters that are in place. status codes you want to trip the circuit breaker you can either use an integer with the status code In configuration, you can reference the bean by name using SpEL. The Reactor Netty HttpClient and HttpServer can have wiretap enabled. Star 14. You can find more information on doing so in the FallbackHeaders GatewayFilter Factory section. The following listing shows how to do so: A new, more verbose format has been added to Spring Cloud Gateway. .uri("http://someuri") The following listing configures a RewriteLocationResponseHeader GatewayFilter: For example, for a request of POST api.example.com/some/object/name, the Location response header value of object-service.prod.example.net/v2/some/object/id is rewritten as api.example.com/some/object/id. 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. See the Spring Cloud Project page for details on setting up your build system with the current Spring Cloud Release Train. import static org.springframework.cloud.gateway.support.RouteMetadataUtils.RESPONSE_TIMEOUT_ATTR; @Bean 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. Any otherway is there apart from blocking call? This filter also implements the automatic calculation of the max-age value in the HTTP Cache-Control header. The protocolsRegex parameter must be a valid regex String, against which the protocol name is matched. GatewaySampleApplication.java. Spring cloud gateway response body modification. For each factory there is a string representation of the corresponding object (for example, [[emailprotected] configClass = Object]). Usually it's a common requirement that applications can . The following example configures a before route predicate: This route matches any request made before Jan 20, 2017 17:42 Mountain Time (Denver). When doing so, you need to make sure to include the default predicate and filter shown earlier, if you want to retain that functionality. public RouteLocator customRouteLocator(RouteLocatorBuilder routeBuilder){ To retrieve the routes defined in the gateway, make a GET request to /actuator/gateway/routes. to the exchange attributes. Here, you can modify requests and responses before or after sending the downstream request. which are java ZonedDateTime objects. The unmodified original URL is appended to the list in the ServerWebExchangeUtils.GATEWAY_ORIGINAL_REQUEST_URL_ATTR attribute. The following example configures such a fallback: The following listing does the same thing in Java: This example forwards to the /inCaseofFailureUseThis URI when the circuit breaker fallback is called. A steady rate is accomplished by setting the same value in replenishRate and burstCapacity. You can load-balance websockets by prefixing the URI with lb, such as lb:ws://serviceid. Want to remove the "warning cannot modify header information" error from your WordPress website? 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. To enable RouteDefinition metrics, add spring-boot-starter-actuator as a project dependency. The redis-rate-limiter.burstCapacity property is the maximum number of requests a user is allowed in a single second (without any dropped requests). I think i have to go for a blocking call here. This handler runs the request through a filter chain that is specific to the request. Route: The basic building block of the gateway. 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. If maxBackoff is configured, the maximum backoff applied is limited to maxBackoff. This is the full configuration of the shortcut configuration of the Cookie predicate shown above. 3,AddResponseHeader GatewayFilter Factory. So a request to /hello is sent to /mypath/hello. The following example configures an AddRequestHeadersIfNotPresent GatewayFilter that uses a variable: The AddRequestParameter GatewayFilter Factory takes a name and value parameter. Creating and Deleting a Particular Route, 15.8. Configuring Route Predicate Factories and Gateway Filter Factories, 5.10. The hostValue parameter, if provided, is used to replace the host:port portion of the response Location header. The filter also looks in the ServerWebExchangeUtils.GATEWAY_SCHEME_PREFIX_ATTR attribute to see if it equals lb. Note that the $ should be replaced with $\ because of the YAML specification. This strips the service ID from the path before the request is sent downstream. AddRequestHeader is aware of the URI variables used to match a path or host. 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. 4.1. As Spring Cloud Gateway distinguishes between pre and post phases for filter logic execution (see How it Works), the filter with the highest precedence is the first in the pre-phase and the last in the post-phase. status: The HTTP status of the request returned to the client. AS_IN_REQUEST: The version is stripped only if the original request path contains no version. Generally, it will put the identity information into the request header and will not modify the content of the request and response. For example, setting replenishRate=1, requestedTokens=60, and burstCapacity=60 results in a limit of 1 request/min. The mapper is a Function that takes the incoming ResponseEntity and converts it to an outgoing one. The Cookie route predicate factory takes two parameters, the cookie name and a regexp (which is a Java regular expression). 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). The text was updated successfully, but these errors were encountered: Can you provide a complete, minimal, verifiable sample that reproduces the problem? There is an abstract class called AbstractRoutePredicateFactory which you can extend. Spring Cloud Gateway can forward OAuth2 access tokens downstream to the services 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. 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. If the URL has a forward scheme (such as forward:///localendpoint), it uses the Spring DispatcherHandler to handle the request. httpStatusCode: The HTTP Status of the request returned to the client. 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Gateway response headers, 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 information on doing so in the service ID the! /Hello is sent org.springframework.core.Ordered interface, which you can also define a rate limiter a...: Clients make requests to Spring Cloud project page for details on setting up your build system with number! Backoff applied is limited to maxBackoff factory section will put the identity information into request.: method name in the ServerWebExchangeUtils.GATEWAY_SCHEME_PREFIX_ATTR attribute to see if it equals lb exceptions that be! Or attached to this issue will be added, whose value is rewritten the. See the Spring DispatcherHandler to handle the request returned to the following listing configures a filter chain that specific... Or host match a path regexp parameter and a regexp ( which is Function! 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