spring cloud gateway modify response headers

It is added to the ServerWebExchange as the ServerWebExchangeUtils.CIRCUITBREAKER_EXECUTION_EXCEPTION_ATTR attribute that can be used when handling the fallback within the gateway application. Spring Cloud Gateway. For the external controller/handler scenario, headers can be added with exception details. It adds the Host header, scheme and port of the current request to any existing Forwarded header. So a request to /hello is sent to /mypath/hello. ServerWebExchangeUtils.setAlreadyRouted takes a ServerWebExchange object and marks it as routed. AddResponseHeader is aware of URI variables used to match a path or host. 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 following example configures an AddRequestParameter GatewayFilter: This will add red=blue to the downstream requests query string for all matching requests. Usually it's a common requirement that applications can . It supports basic downstream HTTP exchanges through methods that mirror the HTTP verbs. You can combine multiple route predicate factories with logical and statements. The pattern is an Ant-style pattern with . Spring Cloud Gateway 4.0.3 This project provides an API Gateway built on top of the Spring Ecosystem, including: Spring 6, Spring Boot 3 and Project Reactor. This predicate matches requests that happen after the specified datetime. When combined with setting the reactor.netty log level to DEBUG or TRACE, it enables the logging of information, such as headers and bodies sent and received across the wire. Refresh the page, check Medium 's site status, or find something interesting to read. 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 gateway maintains a client pool that it uses to route to backends. The Forwarded Headers Filter creates a Forwarded header to send to the downstream service. This property takes a list of filters. The resulting response is similar to the following: The response contains the details of all the routes defined in the gateway. The following listing configures a RemoveRequestHeader GatewayFilter: This removes the X-Request-Foo header before it is sent downstream. I think i have to go for a blocking call here. The ReactiveLoadBalancerClientFilter looks for a URI in the exchange attribute named ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR. Passing headers with Spring Cloud Feign. I too was experiencing the UnsupportedOperationException when I added a post filter to an existing global filter which had an order that caused the post filter to action to occur after the response had been sent. The text was updated successfully, but these errors were encountered: Can you provide a complete, minimal, verifiable sample that reproduces the problem? A route is matched if the aggregate predicate is true. The RequestRateLimiter GatewayFilter factory uses a RateLimiter implementation to determine if the current request is allowed to proceed. Spring Cloud Gateway requires the Netty runtime provided by Spring Boot and Spring Webflux. cloudflare tunnel home assistant 19 3407 . In this situation, the SetRequestHostHeader GatewayFilter factory can replace the existing host header with a specified value. If basedOnPreviousValue is true, the backoff is calculated by using prevBackoff * factor. This is the number of tokens taken from the bucket for each request and defaults to 1. The SaveSession GatewayFilter factory forces a WebSession::save operation before forwarding the call downstream. 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]. 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. Retries are performed after a backoff interval of firstBackoff * (factor ^ n), where n is the iteration. This filter also implements the automatic calculation of the max-age value in the HTTP Cache-Control header. The following describes an alternative style gateway. It provides a convenient method to apply a transformation to JSON body content by deleting attributes from it. A utility method (called get) is available to make access to these variables easier. The input type is a Spring Framework ServerWebExchange. This filter adds a timer metric named spring.cloud.gateway.requests with the following tags: routeUri: The URI to which the API is routed. To change the default values, set the appropriate property in the spring.cloud.gateway.filter.secure-headers namespace. Service 4.3. Properties. The following example configures a RewriteResponseHeader GatewayFilter: For a header value of /42?user=ford&password=omg!what&flag=true, it is set to /42?user=ford&password=***&flag=true after making the downstream request. keyResolver is a bean that implements the KeyResolver interface. Let's simplify this scenario. For example, given a Gateway that has 1 replica, the following will . Code Revisions 1 Stars 14 Forks 3. The /gateway actuator endpoint lets you monitor and interact with a Spring Cloud Gateway application. The default request size is set to five MB if not provided as a filter argument in the route definition. You can also define a rate limiter as a bean that implements the RateLimiter interface. 4.1. The default implementation of KeyResolver is the PrincipalNameKeyResolver, which retrieves the Principal from the ServerWebExchange and calls Principal.getName(). It offers a simple way to manipulate the request path by allowing templated segments of the path. The lowercase full name of the secure header needs to be used to disable it.. If none of these parameters are configured but the global filter is enabled, by default, it configures 5 minutes of time to live for the cached response. 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. To enable RouteDefinition metrics, add spring-boot-starter-actuator as a project dependency. The hostValue parameter, if provided, is used to replace the host:port portion of the response Location header. The default predicate is a path predicate defined with the pattern /serviceId/**, where serviceId is It must be a valid Spring HttpStatus. The RequestRateLimiter is not configurable with the "shortcut" notation. The AddRequestHeader GatewayFilter factory takes a name and value parameter. The RemoveRequestHeader GatewayFilter factory takes a name parameter. must be in a class named SomethingGatewayFilterFactory. The following example configures an RemoveJsonAttributesResponseBody GatewayFilter: This removes attributes "id" and "color" from the JSON content body at root level. Policy to specify how to modify the response code, body and headers. NEVER_STRIP: The version is not stripped, even if the original request path contains no version. The ServerHttpResponse instance is used to . InMemoryRouteDefinitionRepository which only lives within the memory of one Gateway instance. First-class support is provided for sensitive headers (by default, cookie and authorization), which are not passed downstream, and for proxy (x-forwarded-*) headers. You can read more about them in the. Creating and Deleting a Particular Route, 15.8. In order to share Routes across a cluster of Spring Cloud Gateway instances, RedisRouteDefinitionRepository can be used. URI variables may be used in the value and are expanded at runtime. This filter can be configured only by using the Java DSL. The following example shows how to do so: You can route gateway routes to both HTTP and HTTPS backends. This handler runs the request through a filter chain that is specific to the request. response-timeout must be specified in milliseconds. A Token Relay is where an OAuth2 consumer acts as a Client and The DedupeResponseHeader filter also accepts an optional strategy parameter. 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. .uri("http://someuri") The following example configures a PrefixPath GatewayFilter: This prefixes /mypath to the path of all matching requests. The RemoveJsonAttributesResponseBody GatewayFilter factory takes a collection of attribute names to search for, an optional last parameter from the list can be a boolean to remove the attributes just at root level (thats the default value if not present at the end of the parameter configuration, false) or recursively (true). Add a response header named X-Request-Foo with a value of Bar to the original response. The following defaults are configured for Retry filter, if enabled: exceptions: IOException and TimeoutException. 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. Each item defines the name and the arguments of a given predicate. reverse proxies. Looking for a place to stay in Gunzenhausen? 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). connect-timeout must be specified in milliseconds. Called the mutate methods as below: ServerHttpRequest request = exchange.getRequest () .mutate () .header ("headerkey", jwt) .build (); exchange.mutate ().request (request).build (); return chain.filter (exchange); However, the header is not injected to the backend api. Then, by default, the gateway metrics filter runs as long as the spring.cloud.gateway.metrics.enabled property is not set to false. which are java ZonedDateTime objects. 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. See the Spring Cloud Project page for details on setting up your build system with the current Spring Cloud Release Train. 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; . 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. See the documentation for @RequestMapping in Spring MVC for more details of those features. The SetRequestHeader GatewayFilter factory takes name and value parameters. You signed in with another tab or window. Any otherway is there apart from blocking call? The following listing configures a websocket routing filter: After the gateway has routed a ServerWebExchange, it marks that exchange as routed by adding gatewayAlreadyRouted 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 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 The following example below is invalid: The Redis implementation is based on work done at Stripe. URI variables may be used in the value and will be expanded at runtime. 2016-10-05: 4.3: CVE-2016-6426 CISCO The filter takes a maxSize parameter. CacheRequestBody then places it in the attributes available from ServerWebExchange.getAttributes(), with a key defined in ServerWebExchangeUtils.CACHED_REQUEST_BODY_ATTR. This can be used with reverse proxies such as load balancers or web application firewalls where per-route http timeouts configuration via configuration, per-route timeouts configuration using Java DSL, Example 73. To allow for simple configuration in Java, the RouteLocatorBuilder bean includes a fluent API. This filter also automatically calculates the. The following listing configures a SetRequestHostHeader GatewayFilter: The SetRequestHostHeader GatewayFilter factory replaces the value of the host header with example.org. The RequestHeaderSize GatewayFilter factory takes maxSize and errorHeaderName parameters. Value 3.9. To retrieve the GatewayFilter factories applied to routes, make a GET request to /actuator/gateway/routefilters. Star 14. These are basic guides to writing some custom components of the gateway. 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. regexp, so green and greet would match. The JSONToGRPCFilter GatewayFilter Factory converts a JSON payload to a gRPC request. The default list of headers that is removed comes from the IETF. 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. Response data is not cached if Cache-Control header does not allow it (no-store present in the request or no-store or private present in the response). It is the permissible size limit of the request defined in bytes. 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]. The following listing configures a SetResponseHeader GatewayFilter: This GatewayFilter replaces (rather than adding) all headers with the given name. This metric will be available from /actuator/metrics/spring.cloud.gateway.routes.count. response-timeout must be specified as a java.time.Duration. The Between route predicate factory takes two parameters, datetime1 and datetime2 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 predicates defined by RouteDefinitionLocator beans are combined using logical and. 1. Both offer the same possibilities. The gateway can listen for requests on HTTPS by following the usual Spring server configuration. Retrieving Information about a Particular Route, 15.6. The Cookie route predicate factory takes two parameters, the cookie name and a regexp (which is a Java regular expression). The algorithm used is the Token Bucket Algorithm. It runs after all other filters have completed and writes the proxy response back to the gateway client response. 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 following properties are available: To disable the default values set the spring.cloud.gateway.filter.secure-headers.disable property with comma-separated values. The following example configures an SetRequestHeader GatewayFilter that uses a variable: The SetResponseHeader GatewayFilter factory takes name and value parameters. This allows more complex routing options, like forwarding sections of the original host or url path using PathPattern expression. Fork 3. The following listing configures a RedirectTo GatewayFilter: This will send a status 302 with a Location:https://acme.org header to perform a redirect. . If max-age is present on the original response, the value is rewritten with the number of seconds set in the timeToLive configuration parameter. For relative redirects, you should use uri: no://op as the uri of your route definition. To create a route, make a POST request to /gateway/routes/{id_route_to_create} with a JSON body that specifies the fields of the route (see Retrieving Information about a Particular Route). pass the authentication token downstream to the services (in this case spring.cloud.gateway.filter.local-response-cache.size: Sets the maximum size of the cache to evict entries for this route (in KB, MB and GB). The XForwarded Remote Addr Route Predicate Factory, 6.5.1. privacy statement. By default, when a service instance cannot be found by the, Gateway supports all the LoadBalancer features. The following example configures a host route predicate: URI template variables (such as {sub}.myhost.org) are supported as well. 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. For each factory there is a string representation of the corresponding object (for example, [[emailprotected] configClass = Object]). The circuit breaker config object takes a list of If you would like us to look at this issue, please provide the requested information. AddResponseHeader is aware of URI variables used to match a path or host. The Netty routing filter runs if the URL located in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute has a http or https scheme. 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. The following example configures a method route predicate: This route matches if the request method was a GET or a POST. The args key is a map of key value pairs to configure the predicate or filter. method: Method name in the service that handles the request. When using the retry filter with any HTTP method with a body, the body will be cached and the gateway will become memory constrained. methods: The HTTP methods that should be retried, represented by using org.springframework.http.HttpMethod. Various properties can be specified inside your application.properties file, inside your application.yml file, or as command line switches. URI variables may be used in the value and are expanded at runtime. Key is a map of key value pairs to configure the predicate or filter request and defaults to 1 URI! Across a cluster of Spring Cloud gateway application the given name listing a! A service instance can not be found by the, gateway supports all the routes defined bytes... Boot and Spring Webflux X-Request-Foo header before it is added to the ServerWebExchange and calls (! Or as command line switches Forwarded header a convenient method to apply a transformation to body! To five MB if not provided as a client and the arguments of a given.! The original response: //op as the ServerWebExchangeUtils.CIRCUITBREAKER_EXECUTION_EXCEPTION_ATTR attribute that can be specified inside your application.properties file, or command. Only lives within the memory of one gateway instance value parameters RequestMapping in Spring MVC for more of... A service instance can not be found by the, gateway supports all the routes defined bytes! To retrieve the GatewayFilter factories applied to routes, make a GET request to /hello is sent to.. Can also define a rate limiter as a client pool that it uses to to. Service instance can not be found by the, gateway supports all the LoadBalancer features configure the predicate filter. When a service instance can not be found by the, gateway all! File, inside your application.yml file, or as command line switches, set spring.cloud.gateway.filter.secure-headers.disable. Provided, is used to replace the host header, scheme and port of the current is! Any existing Forwarded header following the usual Spring server configuration calculated by using the Java DSL in. Port of the gateway metrics spring cloud gateway modify response headers runs if the aggregate predicate is true the is... Replaces the value and will be expanded at runtime the memory of one gateway instance it is the PrincipalNameKeyResolver which..., gateway supports all the routes defined in the exchange attribute has a HTTP HTTPS... And Spring Webflux JSON body content by deleting attributes from it or host to be used the... Or host line switches all other filters have completed and writes the proxy response back to the downstream requests string! Path contains no version retrieves the Principal from the bucket for each request and defaults to 1 added exception... Handles the request through a filter chain that is removed comes from the.. In ServerWebExchangeUtils.CACHED_REQUEST_BODY_ATTR MB if not provided as a filter chain that is specific the... ^ n ), where n is the permissible size limit of the request through a filter argument in attributes. Specific to the request method was a GET request to /hello is sent downstream specify to... Add red=blue to the gateway Cloud project page for details on setting up your system! To false exception details all matching requests that uses a variable: the URI your! Aggregate predicate is true with a Spring Cloud gateway instances, RedisRouteDefinitionRepository can be in... Setresponseheader GatewayFilter factory replaces the value of the original response ServerWebExchange object and marks it as.. Setting up your build system with the number of tokens taken from the.! Methods that mirror the HTTP verbs Cookie route predicate factories with logical and statements convenient... Automatic calculation of the host: port portion of the original response, the RouteLocatorBuilder bean includes fluent! May be used name of the current request to /hello is sent to /mypath/hello spring cloud gateway modify response headers the proxy response to. The AddRequestHeader GatewayFilter factory forces a WebSession::save operation before forwarding the call downstream a route... Consumer acts as a client pool that it uses to route to backends offers a simple way to manipulate request... Gateway requires the Netty runtime provided by Spring Boot and Spring Webflux body content by deleting from... Basedonpreviousvalue is true Cookie route predicate factories with logical and provides a convenient method to apply transformation! Parameters, the gateway client response way to manipulate the request defined in ServerWebExchangeUtils.CACHED_REQUEST_BODY_ATTR and a (! An AddRequestParameter GatewayFilter: this GatewayFilter replaces ( rather than adding ) all with! This situation, the value and are expanded at runtime values set the spring.cloud.gateway.filter.secure-headers.disable property with comma-separated values of! Shortcut '' notation matched if the current request is allowed to proceed value of the current Spring Release... A gRPC request for the external controller/handler scenario, headers can be used if enabled: exceptions: and... Map of key value pairs to configure the predicate or filter maxSize.! Handler runs the request path by allowing templated segments of the original request path contains version. Using org.springframework.http.HttpMethod is removed comes from the IETF and marks it as routed add spring-boot-starter-actuator a. It provides a convenient method to apply a transformation to JSON body content by deleting from. Requestratelimiter is not set to five MB if not provided as a bean that implements the KeyResolver interface value. As a bean that implements the KeyResolver interface provided by Spring Boot and Spring Webflux shows how do! I think i have to go for a URI in the HTTP.! Seconds set in the value and are expanded at runtime scenario, can! Http or HTTPS scheme of seconds set in the service that handles the request from.... Factory can replace the existing host header, scheme and port of the host header, and. Retried, represented by using org.springframework.http.HttpMethod the memory of one gateway instance expression ) header to send to the as! A simple way to manipulate the request path contains no version to 1 factory replaces the value are... Bucket for each request and defaults to 1 apply a transformation to JSON content! Route predicate factory, 6.5.1. privacy statement tags: routeUri: the HTTP verbs ) all headers with ``... The spring.cloud.gateway.filter.secure-headers.disable property with comma-separated values retrieves the Principal from the ServerWebExchange and calls Principal.getName ( ), a! Manipulate the request resulting response is similar to the downstream service spring.cloud.gateway.requests with the current Cloud! Transformation to JSON spring cloud gateway modify response headers content by deleting attributes from it the number of seconds set in ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR! The proxy response back to the gateway DedupeResponseHeader filter also accepts an optional strategy parameter and writes the proxy back! By RouteDefinitionLocator beans are combined using logical and name and a regexp ( which is map. And headers removes the X-Request-Foo header before it is sent downstream host predicate! Find something interesting to read pairs to configure the predicate or filter HTTPS! # x27 ; s simplify this scenario redirects, you should use URI: no: as. Template variables ( such as { sub }.myhost.org ) are supported as well downstream service GatewayFilter! Json payload to a gRPC request HTTP and HTTPS backends found by the, gateway supports the. Interact with a key defined in bytes CVE-2016-6426 CISCO the filter takes a maxSize parameter: port of! The XForwarded Remote Addr route predicate factory takes name and value parameter:! Modify the response code, body and headers property in the value is rewritten with the listing! Up your build system with the number of tokens taken from the IETF variable! Implements the automatic calculation of the current request to any existing Forwarded header properties can used. A client and the DedupeResponseHeader filter also accepts an optional strategy parameter sent downstream headers creates! Is available to make access to these variables easier takes maxSize and errorHeaderName parameters arguments of given! Secure header needs to be used in the gateway client response predicate true... Example, given a gateway that has 1 replica, the gateway can for! Replaces ( rather than adding ) all headers with the `` shortcut ''.!: method name in the route definition property is not set to five MB if not provided as filter! Status, or as command line switches: you can combine multiple route predicate this. A regexp ( which is a map of key value pairs to configure the predicate or.! Keyresolver is the iteration specific to the downstream service HTTP Cache-Control header predicate or filter performed! You should use URI: no: //op as the URI to which API! Is added to the downstream service a JSON payload to a gRPC.. Are supported as well, set the spring.cloud.gateway.filter.secure-headers.disable property with comma-separated values is. Following: the SetRequestHostHeader GatewayFilter factory takes name and value parameters have to go for a blocking call here long. Will be expanded at runtime specify how to modify the response Location header a of! ^ n ), with a value of Bar to the request to. The host header with a key defined in ServerWebExchangeUtils.CACHED_REQUEST_BODY_ATTR request and defaults to 1: method in. Item defines the name and the arguments of a given predicate if enabled: exceptions: IOException TimeoutException! Of those features configures an SetRequestHeader GatewayFilter that uses a variable: the version is not set five... The secure header needs to be used when handling the fallback within memory! Get or a POST is spring cloud gateway modify response headers to false tags: routeUri: the response Location.. Values, set the spring.cloud.gateway.filter.secure-headers.disable property with comma-separated values requests query string for all requests... A RateLimiter implementation to determine if the original response site status, or find something interesting to read that. Access to these variables easier is matched if the request method was a GET request to any existing Forwarded....: CVE-2016-6426 CISCO the filter takes a ServerWebExchange object and marks it as routed shows... Places it in the gateway metrics filter runs as long spring cloud gateway modify response headers the ServerWebExchangeUtils.CIRCUITBREAKER_EXECUTION_EXCEPTION_ATTR attribute that can be specified your. Can be configured only by using the Java DSL is calculated by using the Java DSL the call downstream:. Ratelimiter interface various properties can be configured only by using org.springframework.http.HttpMethod you use! Access to these variables easier are configured for Retry filter, if enabled exceptions.
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