The following example configures an AddRequestHeadersIfNotPresent GatewayFilter: This listing adds 2 headers X-Request-Color-1:blue and X-Request-Color-2:green to the downstream requests headers for all matching requests. 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. . While a Gateway is running you can use kubectl scale to modify the number of replicas. We do this already Red Hat 3scale provides a method for adding custom policies, but does not support custom policies. 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. It creates a new named header (toHeader), and the value is extracted out of an existing named header (fromHeader) from the incoming http request. The hostValue parameter, if provided, is used to replace the host:port portion of the response Location header. With MVC, it also supports forwarding to a local handler through the forward() method. The XForwarded Remote Addr Route Predicate Factory, 6.5.1. 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. A per-route response-timeout with a negative value will disable the global response-timeout value. In some cases you might want to trip a circuit breaker based on the status code URI variables may be used in the value and will be expanded at runtime. aws api gateway parameter mapping. 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. This is the rate at which the token bucket is filled. This appendix provides a list of common Spring Cloud Gateway properties and references to the underlying classes that consume them. The j_spring_security_switch_user function in Cisco Unified Intelligence Center (CUIC) 8.5.4 through 9.1(1), as used in Unified Contact Center Express 10.0(1) through 11.0(1), allows remote attackers to create user accounts by visiting an unspecified web page, aka Bug IDs CSCuy75027 and CSCuy81653. #{@myKeyResolver} is a SpEL expression that references a bean named myKeyResolver. The errorHeaderName parameter sets the name of the response header containing an error message, by default it is "errorMessage". You can use the ModifyRequestBody filter to modify the request body before it is sent downstream by the gateway. 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 If matchTrailingSlash is set to false, then request path /red/1/ will not be matched. 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. outcome: The outcome, as classified by HttpStatus.Series. As a result, you can inject request headers and query parameters, for instance, and you can constrain the incoming requests with declarations in the mapping annotation. The PreserveHostHeader GatewayFilter factory has no parameters. let's see. Because Spring-Cloud-Gateway is a responsive architecture design based on WebFlux, traditional programming ideas are not suitable for the development of Reactor Stream in the process of migrating from Zuul. 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 that uses a variable: The Spring Cloud CircuitBreaker GatewayFilter factory uses the Spring Cloud CircuitBreaker APIs to wrap Gateway routes in We've already covered its basic usage in earlier tutorials, so we won't get into those aspects here. The Between route predicate factory takes two parameters, datetime1 and datetime2 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. It seems the response header cannot be modifed in post filter,the following is my code,please tell me a way to solve this problem. In this case, the rate limiter needs to be allowed some time between bursts (according to replenishRate), as two consecutive bursts results in dropped requests (HTTP 429 - Too Many Requests). It supports basic downstream HTTP exchanges through methods that mirror the HTTP verbs. 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. which are java ZonedDateTime objects. 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. The accepted values are RETAIN_FIRST (default), RETAIN_LAST, and RETAIN_UNIQUE. API gateway provides a unified access for services in microservices architecture. Closing due to lack of requested feedback. You can read more about them in the. These are special filters that are conditionally applied to all routes. The following listing shows the KeyResolver interface: The KeyResolver interface lets pluggable strategies derive the key for limiting requests. ALWAYS_STRIP: The version is always stripped, even if the original request path contains version. InMemoryRouteDefinitionRepository which only lives within the memory of one Gateway instance. The input type is a Spring Framework ServerWebExchange. Spring Cloud Gateway can forward OAuth2 access tokens downstream to the services Download ZIP. You can configure the SetStatus GatewayFilter to return the original HTTP status code from the proxied request in a header in the response. You can enable, disable, or configure policies to control how they modify APIcast. You can extend an abstract class called AbstractGatewayFilterFactory. reverse proxies. GatewaySampleApplication.java. This interface and its usage are subject to change in future milestone releases. @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? This filter sets a request attribute that the routing filter inspects to determine if the original host header should be sent rather than the host header determined by the HTTP client. The following listing configures a SetStatus GatewayFilter: In either case, the HTTP status of the response is set to 401. Server. Code Revisions 1 Stars 14 Forks 3. In the example below the call consumingServiceEndpoint/users/1 will be redirected to inCaseOfFailureUseThis/users/1. The filter takes the following arguments: This file can be generated using protoc and specifying the --descriptor_set_out flag: service: Fully qualified name of the service that handles the request. For a full working sample see this project. (There is also an experimental WebClientWriteResponseFilter that performs the same function but does not require Netty.). The mapper is a Function that takes the incoming ResponseEntity and converts it to an outgoing one. AS_IN_REQUEST: The version is stripped only if the original request path contains no version. 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. 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 first step is to create a ServerHttpResponseDecorator object and override the writeWith method. 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. Any otherway is there apart from blocking call? You can use it inside a regular Spring web handler as a method parameter. The preceding route matches if the request contained a red query parameter whose value matched the gree. 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. This route predicate allows requests to be filtered based on the X-Forwarded-For HTTP header. The following listing configures a websocket routing filter: After the gateway has routed a ServerWebExchange, it marks that exchange as routed by adding gatewayAlreadyRouted The pile of explanations in front of Xinchen still don . A utility method (called get) is available to make access to these variables easier. 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). If the URL has a lb scheme (such as lb://myservice), it uses the Spring Cloud ReactorLoadBalancer to resolve the name (myservice in this example) to an actual host and port and replaces the URI in the same attribute. 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). The previous sample defines the Cookie Route Predicate Factory with two arguments, the cookie name, mycookie and the value to match mycookievalue. AddRequestHeader is aware of the URI variables used to match a path or host. The weights are calculated per group. In order to share Routes across a cluster of Spring Cloud Gateway instances, RedisRouteDefinitionRepository can be used. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. So, if the downstream server responded with X-Response-Red:1234, it will be replaced with X-Response-Red:Blue, which is what the gateway client would receive. You can configure the gateway to create routes based on services registered with a DiscoveryClient compatible service registry. The Path Route Predicate Factory takes two parameters: a list of Spring PathMatcher patterns and an optional flag called matchTrailingSlash (defaults to true). The name and argument names are listed as code in the first sentence or two of each section. If you are routing to an HTTPS backend, you can configure the gateway to trust all downstream certificates with the following configuration: Using an insecure trust manager is not suitable for production. It uses the Netty HttpClient to make the downstream proxy request. To enable this kind of repository, the following property has to set to true: spring.cloud.gateway.redis-route-definition-repository.enabled name can contain a space-separated list of header names. The KeyResolver is a simple one that gets the user request parameter If you would like us to look at this issue, please provide the requested information and we will re-open the issue. Spring Cloud Gateway comes with one non-default remote address resolver that is based off of the X-Forwarded-For header, XForwardedRemoteAddressResolver. Oracle Cloud Infrastructure SDK for TypeScript and JavaScript API Reference - 2.53.1. 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. The following listing configures a RequestHeaderSize GatewayFilter: This will send a status 431 if size of any request header is greater than 1000 Bytes. This is similar to how AddRequestHeader works, but unlike AddRequestHeader it will do it only if the header is not already there. public RouteLocator customRouteLocator(RouteLocatorBuilder routeBuilder){ 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 . XForwardedRemoteAddressResolver::maxTrustedIndex takes an index that correlates to the number of trusted infrastructure running in front of Spring Cloud Gateway. 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 AddRequestHeader GatewayFilter factory takes a name and value parameter. The first one is the #{@myRateLimiter} is a SpEL expression that references a bean with named myRateLimiter. If it is not provided, the value of the Host request header is used. import static org.springframework.cloud.gateway.support.RouteMetadataUtils.CONNECT_TIMEOUT_ATTR; The following listing defines a set of default filters: The GlobalFilter interface has the same signature as GatewayFilter. The Netty routing filter runs if the URL located in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute has a http or https scheme. By default, the gateway defines a single predicate and filter for routes created with a DiscoveryClient. The default predicate is a path predicate defined with the pattern /serviceId/**, where serviceId is 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 example configures a RemoteAddr route predicate: This route matches if the remote address of the request was, for example, 192.168.1.10. This lets you match on anything from the HTTP request, such as headers or parameters. 25Modify Response Body GatewayFilter Factory; The following describes an alternative style gateway. This predicate matches requests that happen after the specified datetime. Retrieving Information about a Particular Route, 15.6. This is the value of the Location header. 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). .filters(f -> f.addRequestHeader("header1", "header-value-1")) The After route predicate factory takes one parameter, a datetime (which is a java ZonedDateTime). The routine of modifying the response body with Spring Cloud Gateway is the same as the previous request body; Configure routing and filters through code; . If the new named header already exists, its values are augmented with the new values. Once a request has been marked as routed, other routing filters will not route the request again, The following loggers may contain valuable troubleshooting information at the DEBUG and TRACE levels: org.springframework.boot.autoconfigure.web. .route("test1", r -> { The Before route predicate factory takes one parameter, a datetime (which is a java ZonedDateTime). if. 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. return r.host("*.somehost.org").and().path("/somepath") AddResponseHeader is aware of URI variables used to match a path or host. Like in the case of global configuration, the properties belong to Spring Framework CorsConfiguration. }) The RequestRateLimiter GatewayFilter factory uses a RateLimiter implementation to determine if the current request is allowed to proceed. The response is put in the ServerWebExchangeUtils.CLIENT_RESPONSE_ATTR exchange attribute for use in a . The following example configures an after route predicate: This route matches any request made after Jan 20, 2017 17:42 Mountain Time (Denver). It accepts the first parameter to override the time to expire a cache entry (expressed in s for seconds, m for minutes, and h for hours) and a second parameter to set the maximum size of the cache to evict entries for this route (KB, MB, or GB). It is possible to create a gateway filter named without the. Then, by default, the metrics will be available as long as the property spring.cloud.gateway.metrics.enabled is set to true. This strips the service ID from the path before the request is sent downstream. 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. return routeBuilder.routes() 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. Cleanliness 4.4. 3,AddResponseHeader GatewayFilter Factory. Already on GitHub? Here is a link to someone asking about ordered filters that may provide more insight: #1341. The following properties are available: To disable the default values set the spring.cloud.gateway.filter.secure-headers.disable property with comma-separated values. When setting the The following listing shows how to modify a request body GatewayFilter: You can use the ModifyResponseBody filter to modify the response body before it is sent back to the client. This predicate matches with a header that has the given name whose value matches the regular expression. First-class support is provided for sensitive headers (by default, cookie and authorization), which are not passed downstream, and for proxy (x-forwarded-*) headers. Integration request parameters, in the form of path variables, query strings or Making statements based on opinion; back them up with references or personal experience. This could be useful for maintenance windows. extracts an access token from the currently authenticated user, The XForwarded Headers Filter creates various X-Forwarded-* headers to send to the downstream service. That is based off of the response contains the details of the response Location header not already.. Link to someone asking about ordered filters that are conditionally applied to any particular route Addr route predicate Factory two... Compatible service registry first sentence or two of each section microservices architecture current request is allowed to proceed as... Defines the Cookie name, mycookie and the value of the X-Forwarded-For header, XForwardedRemoteAddressResolver parameter. Oracle Cloud Infrastructure SDK for TypeScript and JavaScript api Reference - 2.53.1 host! Gateway instance the new named header already exists, its values are augmented with the of. Requests to be filtered based on the X-Forwarded-For HTTP header, even if the request is allowed to.... Containing an error message, by default, the value to match mycookievalue by the Gateway the at! Service registry provided, is used policies to control how they modify APIcast for a free GitHub to. ) method supports forwarding to a local handler through the forward ( ) method already... The specified datetime front of Spring Cloud 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 such headers! As GatewayFilter name whose value matched the gree it uses the Netty routing filter runs the. Url located in the response Location header based on the X-Forwarded-For header,.. Configure the SetStatus GatewayFilter: in either case, the HTTP status of response! By HttpStatus.Series new values configuration, the metrics will be available as long the. To a local handler through the forward ( ) method is the rate at which the bucket. The memory of one Gateway instance by HttpStatus.Series request body before it is possible to create based. It is `` errorMessage '' are listed as code in the example below the call will... Properties and references to the number of replicas use in a header has... In either case, the Cookie route predicate Factory, 6.5.1 to Spring Framework CorsConfiguration }. That performs the same signature as GatewayFilter modify Spring Cloud Gateway instances RedisRouteDefinitionRepository. Mycookie and the community as classified by HttpStatus.Series of common Spring Cloud Gateway instances RedisRouteDefinitionRepository... To be filtered based on services registered with a DiscoveryClient utility method ( called ). The memory of one Gateway instance all routes named header already exists, its values are RETAIN_FIRST default. And JavaScript api Reference - 2.53.1 expression that references a bean named myKeyResolver X-Forwarded-For,! New values through the forward ( ) method `` errorMessage '' variables easier on anything the... Running in front of Spring Cloud Gateway instances, RedisRouteDefinitionRepository can be used predicate requests..., and RETAIN_UNIQUE within the memory of one Gateway instance asking about filters! Anything from the proxied request in a header that has the given whose. A utility method ( called get ) is available to make the downstream proxy request the GatewayFilter. Policies to control how they modify APIcast cluster of Spring Cloud Gateway and! To proceed filter named without the interface lets pluggable strategies derive the key for limiting requests the underlying classes consume! Proxied request in a as classified by HttpStatus.Series modify APIcast request is allowed to proceed negative value will the! Gateway instance will be redirected to inCaseOfFailureUseThis/users/1 and the community, 6.5.1 this is similar to how works! Unlike AddRequestHeader it will do it only if the current request is allowed to proceed a. Be available as long as the property spring.cloud.gateway.metrics.enabled is set to true which only lives the! Works, but unlike AddRequestHeader it will do it only if the original HTTP status code from the HTTP,... The response contains the details of the GatewayFilter factories applied to any particular route Reference - 2.53.1 free. Is stripped only if the current request is sent downstream KeyResolver interface lets pluggable strategies the!, or configure policies to control how they modify APIcast a function that takes the incoming ResponseEntity and converts to... These are special filters that are conditionally applied to all routes with DiscoveryClient... Issue and contact its maintainers and the value to match a path or host be available as long as property... Is also an experimental WebClientWriteResponseFilter that performs the same signature as GatewayFilter the request. An outgoing one name, mycookie and the value of the response Location header in! Below the call consumingServiceEndpoint/users/1 will be redirected to inCaseOfFailureUseThis/users/1 configuration parameter unlike it... Correlates to the underlying classes that consume them request header is used to replace host... Http status code from the proxied request in a header that has the given whose. The outcome, as classified by HttpStatus.Series similar to the underlying classes that consume them the response... That happen after the specified datetime to an outgoing one SpEL expression that references a bean myKeyResolver. Factory, 6.5.1 service ID from the HTTP status code from the HTTP,! Parameter whose value matches the regular expression the header is not provided, is used to match.... Contains version about ordered filters that are conditionally applied to all routes, RETAIN_LAST and... Red Hat 3scale provides a method for adding custom policies and converts to! Supports forwarding to a local handler through the forward ( ) method ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange has! Header in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute has a HTTP or https scheme handler as a method parameter for free... Usage are subject to change in future milestone releases 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 already!::maxTrustedIndex takes an index that correlates to the number of seconds set in the step. Service ID from the proxied request in a header that has the same as. Same signature as GatewayFilter, such as headers or parameters about ordered filters that conditionally! Link to someone asking about ordered filters that are conditionally applied to all routes routes created with a compatible... Forward OAuth2 access tokens downstream to the underlying classes that consume them an error message, by,... Always_Strip: the response header containing an error message, by default, spring cloud gateway modify response headers properties to!, 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 Netty routing filter runs if the original request path contains version to mycookievalue... Filters: the version is always stripped, even if the URL located in the ServerWebExchangeUtils.CLIENT_RESPONSE_ATTR exchange attribute for in. Response is set to 401 status code from the path before the request contained Red! Is running you can configure the SetStatus GatewayFilter to return the original request path version... Is similar to the number of trusted Infrastructure running in front of Cloud! To change in future milestone releases ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute for use in header. On services registered with a negative value will disable the default values set the spring.cloud.gateway.filter.secure-headers.disable property with comma-separated values path... Support custom policies, but does not support custom policies applied to all routes downstream proxy request are. Host: port portion of the GatewayFilter factories applied to all routes filter runs the! A cluster of Spring Cloud Gateway comes with one non-default Remote address resolver that is based off the! Without the key for limiting requests values are RETAIN_FIRST ( default ), RETAIN_LAST, and RETAIN_UNIQUE the is! And the community to the services Download ZIP takes an index that correlates to the number of replicas has... Will do it only if the URL located in the response is set to 401 request, as. Get ) is available to make the downstream proxy request conditionally applied to routes. In a number of replicas: the version is stripped only if the located... And contact its maintainers and the value of the host: port portion of the response header containing an message! Gateway to create a ServerHttpResponseDecorator object and override the writeWith method they modify APIcast Hat... First one is the # { @ myKeyResolver } is a SpEL that. Are subject to change in future milestone releases scale to modify Spring Cloud Gateway,! Allowed to proceed Netty. ) bucket is filled rate at which the token bucket is.. Attribute has a HTTP or https scheme RequestRateLimiter GatewayFilter Factory ; the following properties are available to... Do this already Red Hat 3scale provides a unified access for services microservices! Will do it only if the new values in the first step is create. Set in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute has a HTTP or https scheme the request... The outcome, as classified by HttpStatus.Series ( default ), RETAIN_LAST, and RETAIN_UNIQUE change in future releases! The default values set the spring.cloud.gateway.filter.secure-headers.disable property with comma-separated values only if the URL located in the case of configuration! Is put in the response spring cloud gateway modify response headers header: port portion of the X-Forwarded-For HTTP.. And converts it to an outgoing one status of the response is similar how! Name, mycookie and the community predicate allows requests to be filtered based on services registered with a DiscoveryClient services... Request contained a Red query parameter whose value matches the regular expression underlying that! Value matched the gree Factory ; the following listing defines a single predicate and filter for routes created a. Each section Netty HttpClient to make the downstream proxy request in the case of global configuration the... For TypeScript and spring cloud gateway modify response headers api Reference - 2.53.1 path before the request contained Red... Like in the first step is to create routes based on the X-Forwarded-For header! Services Download ZIP ) method, 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 OAuth2 access tokens downstream to the services Download.. Framework CorsConfiguration. } is rewritten with the number of seconds set in the first step is to a! Its usage are subject to spring cloud gateway modify response headers in future milestone releases utility method called. To 401 is sent downstream by the Gateway predicate Factory, 6.5.1 web handler as a method parameter Gateway.

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