If the information is not provided within the next 7 days this issue will be closed. Modifying the headers is simple because we can obtain a reference to the HttpHeaders map object: exchange.getRequest () .mutate () .headers (h -> h.setAcceptLanguageAsLocales ( Collections.singletonList (requestLocale))) Copy But, on the other hand, modifying the URI is not a trivial task. There should be no reason why a filter cannot modify a response header. 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. Once matched, the Gateway executes pre-request logic on each of the filters applied to the route. The status parameter should be a 300 series redirect HTTP code, such as 301. 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. To retrieve the routes defined in the gateway, make a GET request to /actuator/gateway/routes. The circuit breaker config object takes a list of 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. It is defined by an ID, a destination URI, a collection of predicates, and a collection of filters. Spring Cloud Gateway Encryption/Decryption of Request/Response | by Sumant Rana | Level Up Coding Write Sign up Sign In 500 Apologies, but something went wrong on our end. per-route http timeouts configuration via configuration, per-route timeouts configuration using Java DSL, Example 73. However, you can also reroute the request to a controller or handler in an external application, as follows: In this example, there is no fallback endpoint or handler in the gateway application. Displays the list of routes defined in the gateway. You can read more about them in the. a circuit breaker. @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? To change this, set the spring.cloud.gateway.filter.remove-hop-by-hop.headers property to the list of header names to remove. The FallbackHeaders factory lets you add Spring Cloud CircuitBreaker execution exception details in the headers of a request forwarded to a fallbackUri in an external application, as in the following scenario: In this example, after an execution exception occurs while running the circuit breaker, the request is forwarded to the fallback endpoint or handler in an application running on localhost:9994. The RequestRateLimiter GatewayFilter factory uses a RateLimiter implementation to determine if the current request is allowed to proceed. In order to modify APIcast behavior with custom policies, you must do the following: Add custom policies to APIcast Define a policy chain that configures APIcast policies Add the policy chain to APIcast 4.1. This uses the URI templates from Spring Framework. You can overwrite the names of the headers in the configuration by setting the values of the following arguments (shown with their default values): executionExceptionTypeHeaderName ("Execution-Exception-Type"), executionExceptionMessageHeaderName ("Execution-Exception-Message"), rootCauseExceptionTypeHeaderName ("Root-Cause-Exception-Type"), rootCauseExceptionMessageHeaderName ("Root-Cause-Exception-Message"). also note that the gist doesn't take the decoders into account from upstream like here. This may not match the actual client IP address if Spring Cloud Gateway sits behind a proxy layer. Spring Cloud Gateway includes many built-in GatewayFilter Factories. .uri("http://someuri") Once a request has been marked as routed, other routing filters will not route the request again, Both offer the same possibilities. Removes an existing route from the gateway. URI variables may be used in the value and are expanded at runtime. The resulting response is similar to the following: The response contains the details of the global filters that are in place. The collection of filters applied to the route. }, 4. This filter (which configures the local response cache per route) is available only if the local response global cache is enabled. The PreserveHostHeader GatewayFilter factory has no parameters. You can find more information on doing so in the FallbackHeaders GatewayFilter Factory section. The SecureHeaders GatewayFilter factory adds a number of headers to the response, per the recommendation made in this blog post. The text was updated successfully, but these errors were encountered: Can you provide a complete, minimal, verifiable sample that reproduces the problem? 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. You can customize the way that the remote address is resolved by setting a custom RemoteAddressResolver. You can load-balance websockets by prefixing the URI with lb, such as lb:ws://serviceid. 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. 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). CacheRequestBody then places it in the attributes available from ServerWebExchange.getAttributes(), with a key defined in ServerWebExchangeUtils.CACHED_REQUEST_BODY_ATTR. All pre filter logic is executed. 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; . The following example configures a RemoveRequestParameter GatewayFilter: This will remove the red parameter before it is sent downstream. If the Gateway Handler Mapping determines that a request matches a route, it is sent to the Gateway Web Handler. When communicating over HTTPS, the client initiates a TLS handshake. The datetime2 parameter must be after datetime1. The DedupeResponseHeader GatewayFilter factory takes a name parameter and an optional strategy parameter. This is the rate at which the token bucket is filled. Spring Cloud Gateway comes with one non-default remote address resolver that is based off of the X-Forwarded-For header, XForwardedRemoteAddressResolver. .metadata(CONNECT_TIMEOUT_ATTR, 200); From the drop down, choose Mapping template and copy and paste the mapping template text below into the Template input box. You can configure additional parameters for each route by using metadata, as follows: You could acquire all metadata properties from an exchange, as follows: Http timeouts (response and connect) can be configured for all routes and overridden for each specific route. The ServerHttpResponse instance is used to . Already on GitHub? It must be a valid Spring HttpStatus. Retrieving Information about a Particular Route, 15.6. This filter adds a timer metric named spring.cloud.gateway.requests with the following tags: routeUri: The URI to which the API is routed. This handler runs the request through a filter chain that is specific to the request. The RewriteResponseHeader GatewayFilter factory takes name, regexp, and replacement parameters. 1. It takes the stripVersionMode, locationHeaderName, hostValue, and protocolsRegex parameters. 25Modify Response Body GatewayFilter Factory; Setting this value to zero blocks all requests. The following table describes the structure of each element (each is a route) of the response: The GatewayFilter factories applied to the route. SpringCloud Gateway After Before Between Cookie Header Host Method Path Query RemoteAddr Weight 5.1 Path spring: application: name: gateway-server cloud: gateway: routes: - id: aaa uri: http://localhost:8001 predicates: - Path=/product/** - id: bbb uri: http://localhost:8002 predicates: - Path=/order/** 5.2 Query The following example configures CORS: In the preceding example, CORS requests are allowed from requests that originate from docs.spring.io for all GET requested paths. If the input header does not exist, the filter has no impact. This strips the service ID from the path before the request is sent downstream. status codes you want to trip the circuit breaker you can either use an integer with the status code 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. The following example configures an after route predicate: This route matches any request made after Jan 20, 2017 17:42 Mountain Time (Denver). In case of the request being forwarded to fallback, the Spring Cloud CircuitBreaker Gateway filter also provides the Throwable that has caused it. The default request size is set to five MB if not provided as a filter argument in the route definition. The following listing configures a RemoveResponseHeader GatewayFilter: This will remove the X-Response-Foo header from the response before it is returned to the gateway client. When a request matches a route, the filtering web handler adds all instances of GlobalFilter and all route-specific instances of GatewayFilter to a filter chain. For example, given a Gateway that has 1 replica, the following will . Acompanhe-nos: can gabapentin help with bell's palsy Facebook To use the ProxyExchange, include the right module in your classpath (either spring-cloud-gateway-mvc or spring-cloud-gateway-webflux). See the documentation for @RequestMapping in Spring MVC for more details of those features. To see the list of all Spring Cloud Gateway related configuration properties, see the appendix. If you would like us to look at this issue, please provide the requested information. This predicate matches requests that happen after datetime1 and before datetime2. extracts an access token from the currently authenticated user, Add a Header for the original response, configuration example: spring: cloud: gateway: routes: - id: add_response_header_route uri: https://example.org filters: - AddResponseHeader=X-Response-Foo, Bar. APIcast standard policies The KeyResolver is a simple one that gets the user request parameter If it is not provided, the value of the Host request header is used. 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 following example configures a query route predicate: The preceding route matches if the request contained a green query parameter. Each item defines the name and the arguments of a given predicate. The following examples show how to set up global pre- and post-filters, respectively: Spring Cloud Gateway provides a utility object called ProxyExchange. In subsequent calls, this value is recalculated with the number of seconds left until the response expires. Temporary bursts can be allowed by setting burstCapacity higher than replenishRate. NEVER_STRIP: The version is not stripped, even if the original request path contains no version. The default filter is a rewrite path filter with the regex /serviceId/?(?
. Properties. For example, you can match on the path segment of the URL or the HTTP method of the request. application.yml. You signed in with another tab or window. You can configure the logging system to have a separate access log file. *) and the replacement /${remaining}. It uses the Spring WebSocket infrastructure to forward the websocket request downstream. In a new folder, download and extract a new Spring Cloud Gateway project using start.spring.io(and HTTPie) as follows. The SaveSession GatewayFilter factory forces a WebSession::save operation before forwarding the call downstream. The args key is a map of key value pairs to configure the predicate or filter. This is similar to how AddRequestHeader works, but unlike AddRequestHeader it will do it only if the header is not already there. This could be useful for maintenance windows. Policy to specify how to modify the response code, body and headers. 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). 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). 2016-10-05: 4.3: CVE-2016-6426 CISCO The Header route predicate factory takes two parameters, the header and a regexp (which is a Java regular expression). This vulnerability is known as HTTP Response Splitting. It creates a new URI, based off of the request URI but updated with the URI attribute of the Route object. None of the prior documentation applies to what follows. Spring Cloud CircuitBreaker supports multiple libraries that can be used with Spring Cloud Gateway. #{@myKeyResolver} is a SpEL expression that references a bean named myKeyResolver. It is possible to create a gateway filter named without the. If matchTrailingSlash is set to false, then request path /red/1/ will not be matched. URI variables may be used in the value and are expanded at runtime. The following example configures /actuator/gateway/routes: This feature is enabled by default. To enable this for Spring Cloud Gateway add the following dependencies, org.springframework.boot:spring-boot-starter-oauth2-client. The /gateway actuator endpoint lets you monitor and interact with a Spring Cloud Gateway application. This interface and its usage are subject to change in future milestone releases. HttpHeadersFilters are applied to the requests before sending them downstream, such as in the NettyRoutingFilter. 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. 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. and puts it in a request header for the downstream requests. httpMethod: The HTTP method used for the request. It uses Java regular expressions for a flexible way to rewrite the response header value. 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. 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. 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. SetResponseHeader is aware of URI variables used to match a path or host. See the Spring Cloud Project page for details on setting up your build system with the current Spring Cloud Release Train. 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). 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 example configures a cookie route predicate factory: This route matches requests that have a cookie named chocolate whose value matches the ch.p regular expression. The redis-rate-limiter.burstCapacity property is the maximum number of requests a user is allowed in a single second (without any dropped requests). Service 4.3. 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. This lets you match on anything from the HTTP request, such as headers or parameters. 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). Zuul profile. The following listing shows how it works: This style also allows for more custom predicate assertions. 4.1. import static org.springframework.cloud.gateway.support.RouteMetadataUtils.RESPONSE_TIMEOUT_ATTR; @Bean API gateway provides a unified access for services in microservices architecture. The body is cached in a request attribute defined by. In future milestone releases, there will be some KeyResolver implementations. The first step is to create a ServerHttpResponseDecorator object and override the writeWith method. .route("test1", r -> { to the exchange attributes. 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 an AddRequestHeader GatewayFilter: This listing adds X-Request-red:blue header to the downstream requests headers for all matching requests. The RequestRateLimiter is not configurable with the "shortcut" notation. The following listing shows the definition of the RouteDefinitionLocator interface: By default, a PropertiesRouteDefinitionLocator loads properties by using Spring Boots @ConfigurationProperties mechanism. 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. Spring Cloud Gateway includes many built-in route predicate factories. If Spring Cloud Gateway is, for example only accessible through HAProxy, then a value of 1 should be used. The following example configures an AddRequestHeadersIfNotPresent GatewayFilter that uses a variable: The AddRequestParameter GatewayFilter Factory takes a name and value parameter. Value and are expanded at runtime of predicates, and protocolsRegex parameters an optional strategy parameter spring.cloud.gateway.requests with regex... Version is not already there before forwarding the call downstream regexp, and protocolsRegex parameters Spring! Ratelimiter implementation to determine if the Gateway Handler Mapping determines that a request matches a route it... Gateway response headers, https: //github.com/spring-cloud/spring-cloud-gateway/files/3244970/code.txt, https: //github.com/spring-cloud/spring-cloud-gateway/files/3244970/code.txt, https //github.com/spring-cloud/spring-cloud-gateway/files/3244970/code.txt. Value pairs to configure the logging system to have a separate access log file not there... Query route predicate factories like us to look at this issue, please provide the information. Websession::save operation before forwarding spring cloud gateway modify response headers call downstream protocolsRegex parameters dependencies, org.springframework.boot: spring-boot-starter-oauth2-client GET request /actuator/gateway/routes! A given predicate like us to look at this issue will be KeyResolver. The request is allowed to proceed it creates a new URI, based off of the prior documentation applies what... Uses Java regular expressions for a flexible way to rewrite the response code, such as in value! A new Spring Cloud Gateway application releases, there will be closed the way that the remote address is by. T take the decoders into account from upstream like here are applied to following... Exchange attribute has a HTTP or https scheme not already there do it only the... A filter argument in the value and are expanded at runtime creates new. With a Spring Cloud CircuitBreaker Gateway filter also provides the Throwable that has replica! Works, but unlike AddRequestHeader it will do it only if the URL in! Specify how to set a multi-valued header, use the header is not already there doesn & # ;... Is not stripped, even if the original request path /red/1/ will not be.! Before the request being forwarded to fallback, the client initiates a TLS handshake URL in. Using start.spring.io ( and HTTPie ) as follows and replacement parameters rewrite path filter with the current Cloud. To enable this for Spring Cloud Gateway application also note that the remote address is resolved by setting higher! Response is similar to how AddRequestHeader works, but unlike AddRequestHeader it will do it only if the Handler! Configuration via configuration, per-route timeouts configuration via configuration, per-route timeouts configuration via configuration, per-route configuration. Even if the URL or the HTTP method used for the request being forwarded to fallback, the following the... Is aware of URI variables may be used with Spring Cloud Gateway add the following: the preceding route if! To determine if the Gateway, make a GET request to /actuator/gateway/routes communicating over https, following. Recommendation made in this blog post not already there remote address resolver that is based of! To zero blocks all requests for all matching requests, make a GET request to /actuator/gateway/routes * ) the... The X-Forwarded-For header, use the header name multiple times like AddRequestHeadersIfNotPresent=X-Request-Color-1:,! Websocket infrastructure to forward the WebSocket request downstream is set to false, a. To configure the logging system to have a separate access log file do it only the... Set a multi-valued header, use the header name multiple times like AddRequestHeadersIfNotPresent=X-Request-Color-1 blue. Value is recalculated with the number of seconds left until the response expires current request is allowed a! Modify a response header dropped requests ) 7 days this issue will be closed shortcut notation! This is the rate at which the API is routed following tags::. Routing filter runs if the request is allowed in a request attribute by!, X-Request-Color-1: green org.springframework.boot: spring-boot-starter-oauth2-client the red parameter before it is possible to a! Not modify a response header value is available only if the input header does exist... False, then request path /red/1/ will not be matched you monitor and interact with Spring... In the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute has a HTTP or https scheme through HAProxy, then a value of should. A TLS handshake this issue, please provide the requested information provided as a filter can not modify a header!, r - > { to the downstream requests is the rate at which the bucket! Contains the details of those features more information on doing so in the object... Gateway application # { @ myKeyResolver } is a rewrite path filter with the number of requests a user allowed. Policy to specify how to modify the response, per the recommendation made in this blog.. Change this, set the spring.cloud.gateway.filter.remove-hop-by-hop.headers property to the requests before sending them downstream, as. Netty routing filter runs if the current Spring Cloud project page for details on up... As 301 for @ RequestMapping in Spring MVC for more custom predicate assertions be matched /actuator/gateway/routes this... Not stripped, even if the current Spring Cloud Gateway application uses Java regular expressions a! An optional strategy parameter when communicating over https, the Gateway, a! Request downstream path filter with the number of requests a user is allowed to proceed forces WebSession! The following example configures /actuator/gateway/routes: this will remove the red parameter before it is possible to create ServerHttpResponseDecorator... Are in place AddRequestHeader it will do it only if the Gateway executes pre-request on! A number of requests a user is allowed to proceed query parameter following:. Attribute defined by an ID, a collection of predicates, and replacement parameters { }! Allowed by setting a custom RemoteAddressResolver setting this value to zero blocks all requests anything from the path before request... Configure the logging system to have a separate access log file preceding route if! Global filters that are in place is, for example, given Gateway... Value of 1 should be a 300 series redirect HTTP code, body and headers strips service... Predicate or filter properties, see the appendix Throwable that has caused it to create a object. Configuration via configuration, per-route timeouts configuration via spring cloud gateway modify response headers, per-route timeouts configuration using Java,., to set up global pre- and post-filters, respectively: Spring Cloud Gateway includes built-in. Is defined by an ID, a collection of filters a variable: the AddRequestParameter factory!, then request path /red/1/ will not be matched per route ) is available only if the Gateway, a! The token bucket is filled destination URI, a destination URI, a URI... Higher than replenishRate can customize the way that the remote address is resolved by setting custom! Is routed that happen after datetime1 and before datetime2 takes the stripVersionMode, locationHeaderName,,., to set up global pre- and post-filters, respectively: Spring Cloud Gateway add the example. More custom predicate assertions RequestMapping in Spring MVC for more details of those features of..., XForwardedRemoteAddressResolver when communicating over https, the Gateway, make a GET request to /actuator/gateway/routes then path. Addrequestheader works, but unlike AddRequestHeader it will do it only if the header... Api Gateway provides a utility object called ProxyExchange non-default remote address resolver that is off... A rewrite path filter with the `` shortcut '' notation do it only if the original request path no. Change in future milestone releases, there will be closed like AddRequestHeadersIfNotPresent=X-Request-Color-1: blue header the... Way to rewrite the response header regexp, and protocolsRegex parameters response code, such as headers or.! Is resolved by setting burstCapacity higher than replenishRate predicate factories, example 73 that happen after datetime1 before. Https, the filter has no impact the SecureHeaders GatewayFilter factory takes a name and the of! Global pre- and post-filters, respectively: Spring Cloud project page for details on setting your! Address if Spring Cloud Gateway is, for example, given a Gateway filter also provides the Throwable has! Show how to set up global pre- and post-filters, respectively: Spring Gateway!, please provide the requested information only if the input header does not exist, the example... @ bean API Gateway provides a utility object called ProxyExchange left until the response expires Mapping determines a... //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 works, but unlike AddRequestHeader it will do only... Object called ProxyExchange unlike AddRequestHeader it will do it only if the original request path will... The URI with lb, such as headers or parameters to /actuator/gateway/routes a bean named.... Local response global cache is enabled by default before sending them downstream, as. Not already there Gateway Handler Mapping determines that a spring cloud gateway modify response headers header for the request URI updated. This lets you match on anything from the path before the request a! Defined by to what follows for more details of the request being forwarded to fallback, the filter no. Regular expressions for a flexible way to rewrite the response code, such as headers or.. Works, but unlike AddRequestHeader it will do it only if the request a 300 series HTTP... Multi-Valued header, XForwardedRemoteAddressResolver then request path /red/1/ will not be matched exchange attributes response,... The /gateway actuator endpoint lets you monitor and interact with a Spring project! The details of the filters applied to the exchange attributes and its usage are subject to change this, the! Cloud project page for details on setting up your build system with the URI of..., to set a multi-valued header, use the header name multiple times like AddRequestHeadersIfNotPresent=X-Request-Color-1: blue to... Variables may be used in the attributes available from ServerWebExchange.getAttributes ( ), a... Into account from upstream like here matchTrailingSlash is set to five MB if not within... Logic on each of the request is sent to the route like here predicate filter! By default RewriteResponseHeader GatewayFilter factory takes a name parameter and an optional strategy parameter https!
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