The /gateway actuator endpoint lets you monitor and interact with a Spring Cloud Gateway application. Displays information about a particular route. The following properties are available: To disable the default values set the spring.cloud.gateway.filter.secure-headers.disable property with comma-separated values. It takes the stripVersionMode, locationHeaderName, hostValue, and protocolsRegex parameters. 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. SetResponseHeader is aware of URI variables used to match a path or host. It uses the Netty HttpClient to make the downstream proxy request. Route filters are scoped to a particular route. Retries are performed after a backoff interval of firstBackoff * (factor ^ n), where n is the iteration. (There is also an experimental WebClientHttpRoutingFilter that performs the same function but does not require Netty. This appendix provides a list of common Spring Cloud Gateway properties and references to the underlying classes that consume them. A burst of 20 is allowed, but, in the next second, only 10 requests are available. The following listing configures a RequestSize GatewayFilter: The RequestSize GatewayFilter factory sets the response status as 413 Payload Too Large with an additional header errorMessage when the request is rejected due to size. The arguments are typically listed in the order that are needed for the shortcut configuration. If you would like us to look at this issue, please provide the requested information and we will re-open the issue. public RouteLocator customRouteLocator(RouteLocatorBuilder routeBuilder){ This predicate matches cookies that have the given name and whose values match the regular expression. This uses the URI templates from Spring Framework. Generally, it will put the identity information into the request header and will not modify the content of the request and response. While a Gateway is running you can use kubectl scale to modify the number of replicas. Setting this value to zero blocks all requests. APIcast standard policies The following listing shows how to do so: A new, more verbose format has been added to Spring Cloud Gateway. 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. During your stay, take advantage of some of the amenities offered, including a 24 hour front desk, room service, and a gift shop. 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). NOTE: This is not recommended for production. Then, by default, the metrics will be available as long as the property spring.cloud.gateway.metrics.enabled is set to true. The following example configures a host route predicate: URI template variables (such as {sub}.myhost.org) are supported as well. Removes an existing route from the gateway. Spring Cloud Gateway can forward OAuth2 access tokens downstream to the services if. The default list of headers that is removed comes from the IETF. The resulting response is similar to the following: The response contains the details of all the routes defined in the gateway. It is defined by an ID, a destination URI, a collection of predicates, and a collection of filters. 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 preceding route matches if the request contained a red query parameter whose value matched the gree. To be remotely accessible, the endpoint has to be enabled and exposed over HTTP or JMX in the application properties. 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 a cookie route predicate factory: This route matches requests that have a cookie named chocolate whose value matches the ch.p regular expression. response-timeout must be specified as a java.time.Duration. Sign in The DedupeResponseHeader filter also accepts an optional strategy parameter. 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 name and argument names are listed as code in the first sentence or two of each section. 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. application.yml. It also allows you to pass multi-value headers in the API response to implement things like sending multiple Set-Cookie headers. 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. aws api gateway parameter mapping. Then the proxy request is made. 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. 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). The following describes an alternative style gateway. All pre filter logic is executed. You can use it inside a regular Spring web handler as a method parameter. . The following listing defines a set of default filters: The GlobalFilter interface has the same signature as GatewayFilter. AddResponseHeader is aware of URI variables used to match a path or host. The Forwarded Headers Filter creates a Forwarded header to send to the downstream service. Modifying the request body is a common requirement. After the proxy request is made, the post filter logic is run. In configuration, you can reference the bean by name using SpEL. as the separator. 2016-10-05: 4.3: CVE-2016-6426 CISCO ), The NettyWriteResponseFilter runs if there is a Netty HttpClientResponse in the ServerWebExchangeUtils.CLIENT_RESPONSE_ATTR exchange attribute. Spring Cloud Gateway 1AddRequestHeader GatewayFilter Factory2AddRequestParameter GatewayFilter Factory3AddResponseHeader GatewayFilter Factory4DedupeResponseHeader GatewayFilter Fa. 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. It uses the Spring WebSocket infrastructure to forward the websocket request downstream. 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. The unmodified original URL is appended to the list in the ServerWebExchangeUtils.GATEWAY_ORIGINAL_REQUEST_URL_ATTR attribute. A route is matched if the aggregate predicate is true. By using the fluent Java API, you can use the and(), or(), and negate() operators on the Predicate class. Predicate: This is a Java 8 Function Predicate. }, 4. 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. You can find more information on doing so in the FallbackHeaders GatewayFilter Factory section. See the Spring Cloud Project page for details on setting up your build system with the current Spring Cloud Release Train. 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. The Those values are then available for use by GatewayFilter factories. 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. It supports basic downstream HTTP exchanges through methods that mirror the HTTP verbs. API gateway provides a unified access for services in microservices architecture. httpStatusCode: The HTTP Status of the request returned to the client. If You Appreciate This, You Can Consider: We are thankful for your never ending support. 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. 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. 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. Server. ServerWebExchangeUtils.setAlreadyRouted takes a ServerWebExchange object and marks it as routed. Feign is a great way to communicate between services and send data like a JSON request body, single header or multiple headers and much more. This filter takes an optional keyResolver parameter and parameters specific to the rate limiter (described later in this section). AddResponseHeader is aware of URI variables used to match a path or host. You can configure the SetStatus GatewayFilter to return the original HTTP status code from the proxied request in a header in the response. Displays the list of routes defined in the gateway. AddRequestHeadersIfNotPresent also supports URI variables used to match a path or host. If Spring Cloud Gateway is, for example only accessible through HAProxy, then a value of 1 should be used. If you include the starter, but you do not want the gateway to be enabled, set spring.cloud.gateway.enabled=false. You can add headers to the downstream response by using the header() methods on ProxyExchange. For more information on circuit breakers and the gateway see the Spring Cloud CircuitBreaker Factory section. AddRequestParameter is aware of the URI variables used to match a path or host. If the new named header already exists, its values are augmented with the new values. There are two ways to configure predicates and filters: shortcuts and fully expanded arguments. Value 3.9. The following listing shows how it works: This style also allows for more custom predicate assertions. It offers a simple way to manipulate the request path by allowing templated segments of the path. If the URL has a forward scheme (such as forward:///localendpoint), it uses the Spring DispatcherHandler to handle the request. To remove any kind of sensitive header, you should configure this filter for any routes for which you may want to do so. For a full working sample see this project. It uses the Netty HttpClient to make the downstream proxy request. The following example configures an AddRequestHeader GatewayFilter that uses a variable: The AddRequestHeadersIfNotPresent GatewayFilter factory takes a collection of name and value pairs separated by colon. Passing headers with Spring Cloud Feign. 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 args key is a map of key value pairs to configure the predicate or filter. Spring Cloud Gateway includes many built-in GatewayFilter Factories. series: The series of status codes to be retried, represented by using org.springframework.http.HttpStatus.Series. This is the rate at which the token bucket is filled. This filter works only with HTTP (including HTTPS) requests. This predicate matches requests that happen before the specified datetime. In subsequent calls, this value is recalculated with the number of seconds left until the response expires. . The following example configures /actuator/gateway/routes: This feature is enabled by default. Code Revisions 1 Stars 14 Forks 3. 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. Like in the case of global configuration, the properties belong to Spring Framework CorsConfiguration. 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 SaveSession GatewayFilter factory forces a WebSession::save operation before forwarding the call downstream. 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. You can read more about them in the. URI variables may be used in the value and are expanded at runtime. By default, it creates a NettyChannel by using the default TrustManagerFactory. If matchTrailingSlash is set to false, then request path /red/1/ will not be matched. A per-route response-timeout with a negative value will disable the global response-timeout value. It is the name of the header to be removed. The following example shows how to do so: You can route gateway routes to both HTTP and HTTPS backends. The header is added to the response if configured with the following property: The StripPrefix GatewayFilter factory takes one parameter, parts. Options. The following example configures an AddRequestParameter GatewayFilter: This will add red=blue to the downstream requests query string for all matching requests. The following listing configures a RequestHeaderSize GatewayFilter: This will send a status 431 if size of any request header is greater than 1000 Bytes. Otherwise, the original value in the client request is sent. The following example shows how to do so: The SetPath GatewayFilter factory takes a path template parameter. Once a request has been marked as routed, other routing filters will not route the request again, This section details how to retrieve route filters, including: To retrieve the global filters applied to all routes, make a GET request to /actuator/gateway/globalfilters. 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. The following example creates a Logback configuration: You can configure the gateway to control CORS behavior globally or per route. If maxBackoff is configured, the maximum backoff applied is limited to maxBackoff. The resulting response is similar to the following: The following table describes the structure of the response: The collection of route predicates. The following example configures an AddRequestHeader GatewayFilter: This listing adds X-Request-red:blue header to the downstream requests headers for all matching requests. status codes that if returned will cause the circuit breaker to be tripped. Since 4.0.0, Spring Cloud Gateway supports Spring AOT transformations and native images. Various properties can be specified inside your application.properties file, inside your application.yml file, or as command line switches. The ServerHttpResponse instance is used to . The XForwarded Remote Addr Route Predicate Factory, 6.5.1. 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. Writing Custom GatewayFilter Factories, 17.2.1. 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. These are basic guides to writing some custom components of the gateway. 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). If two hops of trusted infrastructure are required before Spring Cloud Gateway is accessible, then a value of 2 should be used. 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. 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 this for Spring Cloud Gateway add the following dependencies, org.springframework.boot:spring-boot-starter-oauth2-client. To write a GatewayFilter, you must implement GatewayFilterFactory as a bean. The redis-rate-limiter.replenishRate property defines how many requests per second to allow (without any dropped requests). The following maxTrustedIndex values yield the following remote addresses: (invalid, IllegalArgumentException during initialization). reverse proxies. The weights are calculated per group. 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). This type of Repository is not suited to populate Routes across multiple Gateway instances. The input type is a Spring Framework ServerWebExchange. The following listing configures a filter chain: To enable gateway metrics, add spring-boot-starter-actuator as a project dependency. . extracts an access token from the currently authenticated user, However, there is one in another application, registered under localhost:9994. These are special filters that are conditionally applied to all routes. Policy to specify how to modify the response code, body and headers. It should be available as a GitHub (or similar) project or attached to this issue as a zip file. Route: The basic building block of the gateway. Route filters allow the modification of the incoming HTTP request or outgoing HTTP response in some manner. 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 mapper is a Function that takes the incoming ResponseEntity and converts it to an outgoing one. It is the permissible size limit of the request defined in bytes. To use the ProxyExchange, include the right module in your classpath (either spring-cloud-gateway-mvc or spring-cloud-gateway-webflux). per-route http timeouts configuration via configuration, per-route timeouts configuration using Java DSL, Example 73. .uri("http://someuri") If it is not, a status of HTTP 429 - Too Many Requests (by default) is returned. the request should only be allowed if it comes from a trusted list of IP addresses used by those This may not match the actual client IP address if Spring Cloud Gateway sits behind a proxy layer. There is an abstract class called AbstractRoutePredicateFactory which you can extend. a circuit breaker. 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. Configure for High Availability. To enable this kind of repository, the following property has to set to true: spring.cloud.gateway.redis-route-definition-repository.enabled The Between route predicate factory takes two parameters, datetime1 and datetime2 In Writing Custom Route Predicate Factories, 17.2. How does it work? Acompanhe-nos: can gabapentin help with bell's palsy Facebook To configure per-route timeouts: 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. The earlier configuration examples all use a shortcut notation that uses positional arguments rather than named ones. backoff: The configured exponential backoff for the retries. The datetime2 parameter must be after datetime1. The resulting response is similar to the following: The response contains the details of the GatewayFilter factories applied to any particular route. 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