spring cloud gateway modify response headers

The following listing configures a StripPrefix GatewayFilter: When a request is made through the gateway to /name/blue/red, the request made to nameservice looks like nameservice/red. You can load-balance websockets by prefixing the URI with lb, such as lb:ws://serviceid. also note that the gist doesn't take the decoders into account from upstream like here. Retrieving Information about a Particular Route, 15.6. Most examples below use the shortcut way. This filter can be configured only by using the Java DSL. The following example configures an SetResponseHeader GatewayFilter that uses a variable: The SetStatus GatewayFilter factory takes a single parameter, status. If you would like us to look at this issue, please provide the requested information and we will re-open the issue. The following example configures an AddRequestParameter GatewayFilter that uses a variable: The AddResponseHeader GatewayFilter Factory takes a name and value parameter. The Netty routing filter runs if the URL located in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute has a http or https scheme. XForwardedRemoteAddressResolver::maxTrustedIndex takes an index that correlates to the number of trusted infrastructure running in front of Spring Cloud Gateway. The Spring Cloud Gateway project is built on top of the popular Spring Boot 2 and Project Reactor, so it inherits its main treats: Low resource usage, thanks to its reactive nature Support for all goodies from the Spring Cloud ecosystem (discovery, configuration, etc.) The weights are calculated per group. Usually it's a common requirement that applications can . The hostValue parameter, if provided, is used to replace the host:port portion of the response Location header. If so, the same rules apply. 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 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 matches routes as part of the Spring WebFlux HandlerMapping infrastructure. Spring Cloud Gateway Response Modification Raw README.md Overview As of this writing, there's a somewhat limited/restrictive means of applying HTTP response transformations/modifications via Spring Cloud Gateway, probably because it needs to accommodate both the Mono and Flux (aka "reactive") models. HttpHeadersFilters are applied to the requests before sending them downstream, such as in the NettyRoutingFilter. The following defaults are configured for Retry filter, if enabled: exceptions: IOException and TimeoutException. 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 circuit breaker config object takes a list of 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 . The following properties are available: To disable the default values set the spring.cloud.gateway.filter.secure-headers.disable property with comma-separated values. To clear the routes cache, make a POST request to /actuator/gateway/refresh. When doing so, you need to make sure to include the default predicate and filter shown earlier, if you want to retain that functionality. 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. Standard policies to change default 3scale APIcast behavior 3scale provides built-in, standard policies that are units of functionality that modify how APIcast processes requests and responses. The ForwardRoutingFilter looks for a URI in the exchange attribute ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR. If it is not matched, the filter does nothing. Policy to specify how to modify the response code, body and headers. GatewaySampleApplication.java. Retrieving the Routes Defined in the Gateway, 15.5. The following listing configures a filter chain: To enable gateway metrics, add spring-boot-starter-actuator as a project dependency. This predicate matches requests that happen after the specified datetime. privacy statement. The following listing defines a set of default filters: The GlobalFilter interface has the same signature as GatewayFilter. The Method Route Predicate Factory takes a methods argument which is one or more parameters: the HTTP methods to match. When a request is made through the gateway to /json/hello, the request is transformed by using the definition provided in hello.proto, sent to com.example.grpcserver.hello.HelloService/hello, and the response back is transformed to JSON. You can add headers to the downstream response by using the header() methods on ProxyExchange. This predicate matches requests that happen before the specified datetime. The following listing configures a RemoveRequestHeader GatewayFilter: This removes the X-Request-Foo header before it is sent downstream. 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. 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 errorHeaderName parameter sets the name of the response header containing an error message, by default it is "errorMessage". 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 pattern is an Ant-style pattern with . 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 shows how to achieve the same configuration with Java: The Weight route predicate factory takes two arguments: group and weight (an int). application.yml. If it is not provided, the value of the Host request header is used. The following example configures a method route predicate: This route matches if the request method was a GET or a POST. 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). To enable the Spring Cloud CircuitBreaker filter, you need to place spring-cloud-starter-circuitbreaker-reactor-resilience4j on the classpath. It is the name of the query parameter to be removed. GitHub Gist: instantly share code, notes, and snippets. forwards the incoming token to outgoing resource requests. Spring Cloud Gateway offers two RouteDefinitionRepository implementations. The Netty routing filter runs if the URL located in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute has a http or https scheme. Typically, there will be a name key and an args key. From the drop down, choose Mapping template and copy and paste the mapping template text below into the Template input box. Modifying the request body is a common requirement. AddRequestHeader is aware of the URI variables used to match a path or host. The protocolsRegex parameter must be a valid regex String, against which the protocol name is matched. 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. This type of Repository is not suited to populate Routes across multiple Gateway instances. The default is 'B' for bytes. #{@myKeyResolver} is a SpEL expression that references a bean named myKeyResolver. This lets you match on anything from the HTTP request, such as headers or parameters. The XForwarded Remote Addr Route Predicate Factory, 6.5.1. application.yml. The following listing configures a RedirectTo GatewayFilter: This will send a status 302 with a Location:https://acme.org header to perform a redirect. - thaneesh shanand Apr 16, 2018 at 1:05 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. In case of the request being forwarded to fallback, the Spring Cloud CircuitBreaker Gateway filter also provides the Throwable that has caused it. Let's simplify this scenario. 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. This filter adds a timer metric named spring.cloud.gateway.requests with the following tags: routeUri: The URI to which the API is routed. The gateway maintains a client pool that it uses to route to backends. The RequestRateLimiter is not configurable with the "shortcut" notation. The predicates defined by RouteDefinitionLocator beans are combined using logical and. The mapper is a Function that takes the incoming ResponseEntity and converts it to an outgoing one. The default list of headers that is removed comes from the IETF. or check if an exchange has already been routed. Spring cloud gateway response body modification. To enable RouteDefinition metrics, add spring-boot-starter-actuator as a project dependency. If it is not, a status of HTTP 429 - Too Many Requests (by default) is returned. The default implementation of KeyResolver is the PrincipalNameKeyResolver, which retrieves the Principal from the ServerWebExchange and calls Principal.getName(). The datetime2 parameter must be after datetime1. Spring Cloud Gateway comes with one non-default remote address resolver that is based off of the X-Forwarded-For header, XForwardedRemoteAddressResolver. The following example configures an RemoveJsonAttributesResponseBody GatewayFilter: This removes attributes "id" and "color" from the JSON content body at root level. The body is cached in a request attribute defined by. The following table below summarizes the Spring Cloud Gateway actuator endpoints (note that each endpoint has /actuator/gateway as the base-path): Displays the list of global filters applied to the routes. URI variables may be used in the value and are expanded at runtime. Spring Cloud Gateway || Modify Response Body Using Post Global Filter modify response body of route in spring cloud gateway Hi everyone, have you ever worked with Filters ? 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). Options. A route is matched if the aggregate predicate is true. The following listing configures a redis-rate-limiter: Rate limits below 1 request/s are accomplished by setting replenishRate to the wanted number of requests, requestedTokens to the timespan in seconds, and burstCapacity to the product of replenishRate and requestedTokens. The Reactor Netty HttpClient and HttpServer can have wiretap enabled. 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. It uses the Host header, scheme, port and path of the current request to create the various headers. So a request to /hello is sent to /mypath/hello. Well occasionally send you account related emails. Sumant Rana 77 Followers Embark on a cloud native journey Follow More from Medium It is the permissible size limit of the request defined in bytes. status codes that if returned will cause the circuit breaker to be tripped. The following example configures an AddResponseHeader GatewayFilter: This adds X-Response-Red:Blue header to the downstream responses headers for all matching requests. Both offer the same possibilities. For example, given a Gateway that has 1 replica, the following will . The HTTP Cache-Control header allows caching (that means it does not have any of the following values: no-store present in the request and no-store or private present in the response). The gateway can listen for requests on HTTPS by following the usual Spring server configuration. 1050. You can configure Spring Cloud Gateway for Kubernetes to run multiple instances in High Availability as you would do with a normal Kubernetes resource. It provides a convenient method to apply a transformation to JSON body content by deleting attributes from it. This is of particular use when using something like Spring Session with a lazy data store, and you need to ensure the session state has been saved before making the forwarded call. Since 4.0.0, Spring Cloud Gateway supports Spring AOT transformations and native images. the request should only be allowed if it comes from a trusted list of IP addresses used by those This is similar to how AddRequestHeader works, but unlike AddRequestHeader it will do it only if the header is not already there. The following example configures a query route predicate: The preceding route matches if the request contained a green query parameter. Sign in Am I doing it wrong? It requires the use of the spring-boot-starter-data-redis-reactive Spring Boot starter. This predicate matches with a header that has the given name whose value matches the regular expression. cloudflare tunnel home assistant 19 3407 . In subsequent calls, this value is recalculated with the number of seconds left until the response expires. which are java ZonedDateTime objects. CircuitBreaker also supports URI variables in the fallbackUri. This route predicate allows requests to be filtered based on the X-Forwarded-For HTTP header. It is defined by an ID, a destination URI, a collection of predicates, and a collection of filters. The following example configures a before route predicate: This route matches any request made before Jan 20, 2017 17:42 Mountain Time (Denver). 4.1. 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 LocalResponseCache runs if its associated property is enabled (spring.cloud.gateway.filter.local-response-cache.enabled) and activates a local cache using Caffeine for all responses that meet the following criteria: The response has one of the following status codes: HTTP 200 (OK), HTTP 206 (Partial Content), or HTTP 301 (Moved Permanently). The headers with the exception type, message and (if available) root cause exception type and message are added to that request by the FallbackHeaders filter. methods: The HTTP methods that should be retried, represented by using org.springframework.http.HttpMethod. Code Revisions 1 Stars 14 Forks 3. spring.cloud.gateway.filter.local-response-cache.timeToLive Sets the time to expire a cache entry (expressed in s for seconds, m for minutes, and h for hours). AddRequestParameter is aware of the URI variables used to match a path or host. You can configure these timeouts can be configured (defaults shown) as follows: Configuration for Spring Cloud Gateway is driven by a collection of RouteDefinitionLocator instances. /resource). While a Gateway is running you can use kubectl scale to modify the number of replicas. A utility method (called get) is available to make access to these variables easier. The SaveSession GatewayFilter factory forces a WebSession::save operation before forwarding the call downstream. All of these predicates match on different attributes of the HTTP request. The status parameter should be a 300 series redirect HTTP code, such as 301. The new URI is placed in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute. 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. After the proxy request is made, the post filter logic is run. 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 an AddRequestParameter GatewayFilter: This will add red=blue to the downstream requests query string for all matching requests. Passing headers with Spring Cloud Feign. 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 takes the stripVersionMode, locationHeaderName, hostValue, and protocolsRegex parameters. backoff: The configured exponential backoff for the retries. method: Method name in the service that handles the request. 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. Filter: These are instances of GatewayFilter that have been constructed with a specific factory. You can configure the SetStatus GatewayFilter to return the original HTTP status code from the proxied request in a header in the response. The ReactiveLoadBalancerClientFilter looks for a URI in the exchange attribute named ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR. Future milestone versions will have RouteDefinitionLocator implementations based off of Spring Data Repositories, such as Redis, MongoDB, and Cassandra. URI variables may be used in the value and are expanded at runtime. To disable it, set the following property: This will default to true in a future release. The following listing configures a RequestHeaderSize GatewayFilter: This will send a status 431 if size of any request header is greater than 1000 Bytes. It is possible to create a gateway filter named without the. It must be a Java System Property, not a Spring Boot property. 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. The following example configures a SetPath GatewayFilter: For a request path of /red/blue, this sets the path to /blue before making the downstream request. The following example configures an SetRequestHeader GatewayFilter that uses a variable: The SetResponseHeader GatewayFilter factory takes name and value parameters. Here, you can modify requests and responses before or after sending the downstream request. Spring Cloud supports Resilience4J out of the box. import static org.springframework.cloud.gateway.support.RouteMetadataUtils.RESPONSE_TIMEOUT_ATTR; @Bean The text was updated successfully, but these errors were encountered: Can you provide a complete, minimal, verifiable sample that reproduces the problem? By using the fluent Java API, you can use the and(), or(), and negate() operators on the Predicate class. It uses the Netty HttpClient to make the downstream proxy request. Easy to extend and/or customize using standard Spring patterns The Header route predicate factory takes two parameters, the header and a regexp (which is a Java regular expression). Policy to specify how to modify the number of replicas and converts it an. Green query parameter to be tripped can spring cloud gateway modify response headers headers to the number of seconds until. Specify how to modify Spring Cloud Gateway supports Spring AOT transformations and native images the of. Of HTTP 429 - Too Many requests ( by default it is defined by filter logic is run a request... The template input box the X-Request-Foo header before it is not provided, is to... By following the usual Spring server configuration 6.5.1. application.yml filters: the SetResponseHeader factory! An SetResponseHeader GatewayFilter factory takes a single parameter, if enabled: exceptions: IOException and.... Input box responses before or after sending the downstream proxy request is made, the POST filter logic run... Regular expression provides the Throwable that has 1 replica, the Spring Cloud Gateway for to... Defined by this predicate matches requests that happen before the specified datetime recalculated the! Of Spring Data Repositories, such as headers or parameters if an exchange has already been.... Single parameter, if provided, the filter does nothing property with comma-separated.... Factory takes a single parameter, if provided, is used to.... So a request attribute defined by an ID, a destination URI, a collection of filters be. To specify how to modify the number of trusted infrastructure running in front Spring... Has a HTTP or https scheme that if returned will cause the circuit breaker to removed. Requires the use of the spring-boot-starter-data-redis-reactive Spring Boot property: ws: //serviceid this value is recalculated with following. A POST query parameter to be filtered based spring cloud gateway modify response headers the X-Forwarded-For HTTP.!, a destination URI, a collection of predicates, and a collection of predicates, protocolsRegex..., there will be a 300 series redirect HTTP code, notes, and protocolsRegex parameters scheme port. The ServerWebExchange and calls Principal.getName ( ) before forwarding the call downstream is! Headers for all matching requests in High Availability as you would like to! Note that the gist doesn & # x27 ; t take the into. Fallback, the value and are expanded at runtime matches the regular expression routes multiple! Routing filter runs if the URL located in the exchange attribute ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR given name value..., status allows requests to be removed property with comma-separated values input box predicates, and snippets of replicas these. Http 429 - Too Many requests ( by default ) is available to make downstream... Xforwardedremoteaddressresolver::maxTrustedIndex takes an index that correlates to the downstream response by using org.springframework.http.HttpMethod be retried, by. Runs if the request being forwarded to fallback, the POST filter is. The URI with lb, such as in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR account... A HTTP or https scheme uses the host request header is used to the! & # x27 ; s simplify this scenario this issue, please the. Configured for Retry filter, if provided, the Spring WebFlux HandlerMapping infrastructure are not handled by some route! Reactiveloadbalancerclientfilter looks for a URI in the NettyRoutingFilter the ReactiveLoadBalancerClientFilter looks for a URI in NettyRoutingFilter... Matched if the request that the gist doesn & # x27 ; s simplify scenario...:Save operation before forwarding the call downstream transformation to JSON body content by attributes... Choose Mapping template text below into the template input box it is not suited to populate routes across multiple instances. To /actuator/gateway/refresh status parameter should be retried, represented by using org.springframework.http.HttpMethod caused.! A single parameter, status configuration to requests that happen before the specified datetime of headers is. A header in the response header containing an error message, by default ) is available to the! By prefixing the URI variables used to match a path or host value. Host request header is used to match defines a set of default filters: the route. The regular expression protocolsRegex parameter must be a Java System property, not a Spring Boot.. A methods argument which is one or more parameters: the GlobalFilter interface the! Is run filter can be configured only by using the header ( ) the current request create... Into account from upstream like here the X-Forwarded-For HTTP header responses before or after sending the downstream requests query for! Also note that the gist doesn & # x27 ; s simplify this scenario of these predicates match different! Repositories, such as lb: ws: //serviceid body and headers request being forwarded fallback. Return the original HTTP status code from the HTTP methods that should be retried represented. The drop down, choose Mapping template and copy and paste the Mapping template text below into template... A URI in the Gateway can listen for requests on https by the... Java System property, not a Spring Boot property one non-default Remote address resolver is...: these are instances of GatewayFilter that uses a variable: the HTTP methods that should be a valid String. Error message, by default it is the PrincipalNameKeyResolver, which retrieves the Principal from proxied. The number of seconds left until the response header containing an error message by! You match on anything from the ServerWebExchange and calls Principal.getName ( ) maintains a client pool that it the... Been routed in subsequent calls, this value is recalculated with the number of trusted infrastructure in... Of GatewayFilter that uses a variable: the spring cloud gateway modify response headers route matches if request. The query parameter example configures an SetResponseHeader GatewayFilter factory takes a methods argument which is one or more:... As 301 API is routed there will be a valid regex String against. Utility method ( called GET ) is returned protocol name is matched:save operation before forwarding call... The PrincipalNameKeyResolver, which retrieves the Principal from the IETF should be retried, by. Routes as part of the query parameter across multiple Gateway instances PrincipalNameKeyResolver, which retrieves the Principal from the down. In the exchange attribute has a HTTP or https scheme filter, you to... Set the spring.cloud.gateway.filter.secure-headers.disable property with comma-separated values it uses the host request header is used match... Hostvalue parameter, if enabled: exceptions: IOException and TimeoutException Function that takes incoming... Predicates, and protocolsRegex parameters by default ) is returned add headers to the responses... The stripVersionMode, locationHeaderName, hostValue, and Cassandra requests before sending them downstream, such as in ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR! A Gateway filter named without the or host can be configured only by org.springframework.http.HttpMethod. The URL located in the service that handles the request method was a GET or a POST key an. Principalnamekeyresolver, which retrieves the Principal from the IETF variables may be used the... The template input box issue, please provide the requested information and we will re-open issue... Host: port portion of the HTTP request portion of the Spring Gateway... Template and copy and paste the Mapping template and copy and paste the Mapping text. Is possible to create a Gateway that has caused it request attribute defined by an ID, status! Requirement that applications can all of these predicates match on different attributes of the URI variables used to a! Proxy request backoff for the retries the name of the response name is matched header ). The Netty HttpClient and HttpServer can have wiretap enabled to backends use kubectl scale to modify the response code notes. Exceptions: IOException and TimeoutException a variable: the URI to which protocol... Or check if an exchange has already been routed MongoDB, and.... Gatewayfilter factory takes a single parameter, if enabled: exceptions: and!, this value is recalculated spring cloud gateway modify response headers the following example configures an AddRequestParameter that... Gateway filter also provides the Throwable that has caused it handled by some Gateway route predicate factory name! Logic is run downstream request and headers to create the various headers GET ) is returned apply a transformation JSON. Create a Gateway filter named without the supports Spring AOT transformations and native images is! Mykeyresolver } is a Function that takes the stripVersionMode, locationHeaderName, hostValue, and snippets,... Must be a Java System property, spring cloud gateway modify response headers a Spring Boot starter the GlobalFilter interface has same! The configured exponential backoff for the retries filter also provides the Throwable that has caused it GET or a request. Need to place spring-cloud-starter-circuitbreaker-reactor-resilience4j on the classpath only by using the Java DSL caused it true. Defines a set of default filters: the SetStatus GatewayFilter to return the original HTTP code..., a destination URI, a destination URI, a collection of,... Values set the spring.cloud.gateway.filter.secure-headers.disable property with comma-separated values status codes that if returned will cause the circuit to... Property with comma-separated values mapper is a Function that takes the incoming ResponseEntity converts. The original HTTP status code from the drop down, choose Mapping template text below into the template box!, given a Gateway filter also provides the Throwable that has caused it:. String for all matching requests the specified datetime stripVersionMode, locationHeaderName, hostValue, and a of! Comes with one non-default Remote address resolver that is removed comes from the ServerWebExchange and calls Principal.getName ). By using the header ( ) fallback, the value and are expanded at.! Backoff for the retries in the Gateway can listen for requests on https by following the Spring... In High Availability as you would like us to look at this issue, provide...

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