spring cloud gateway modify response headers
Here is a link to someone asking about ordered filters that may provide more insight: #1341. Each item defines the name and the arguments of a given predicate. which are java ZonedDateTime objects. URI variables may be used in the value and will be expanded at runtime. For example, you might want to extract the trailing elements of a path to pass them downstream: All the features of Spring MVC and Webflux are available to gateway handler methods. .filters(f -> f.addRequestHeader("header1", "header-value-1")) 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. This handler runs the request through a filter chain that is specific to the request. The path part of the request URL is overridden with the path in the forward URL. You can enable, disable, or configure policies to control how they modify APIcast. A per-route response-timeout with a negative value will disable the global response-timeout value. It requires the use of the spring-boot-starter-data-redis-reactive Spring Boot starter. 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. to the exchange attributes. Building a Simple Gateway by Using Spring MVC or Webflux, FallbackHeaders GatewayFilter Factory section, Spring Cloud CircuitBreaker Factory section, object-service.prod.example.net/v2/some/object/id, Retrieving Information about a Particular Route. Retries are performed after a backoff interval of firstBackoff * (factor ^ n), where n is the iteration. The following example configures a PreserveHostHeader GatewayFilter: The RedirectTo GatewayFilter factory takes two parameters, status and url. 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. GatewaySampleApplication.java. 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). Already on GitHub? The RemoveRequestHeader GatewayFilter factory takes a name parameter. response-timeout must be specified in milliseconds. The following example configures an after route predicate: This route matches any request made after Jan 20, 2017 17:42 Mountain Time (Denver). ServerWebExchangeUtils.isAlreadyRouted takes a ServerWebExchange object and checks if it has been routed. .uri("http://someuri") The following example configures an AddRequestParameter GatewayFilter: This will add red=blue to the downstream requests query string for all matching requests. This strips the service ID from the path before the request is sent downstream. To allow for simple configuration in Java, the RouteLocatorBuilder bean includes a fluent API. 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 RemoveResponseHeader GatewayFilter: This will remove the X-Response-Foo header from the response before it is returned to the gateway client. AddResponseHeader is aware of URI variables used to match a path or host. To enable wiretap, set spring.cloud.gateway.httpserver.wiretap=true or spring.cloud.gateway.httpclient.wiretap=true for the HttpServer and HttpClient, respectively. It can be used as API gateway in microservice architecture and supports dynamic routing and filtering functions. The circuit breaker config object takes a list of If matchTrailingSlash is set to false, then request path /red/1/ will not be matched. The following listing shows how to do so: A new, more verbose format has been added to Spring Cloud Gateway. This is the full configuration of the shortcut configuration of the Cookie predicate shown above. 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 lowercase full name of the secure header needs to be used to disable it.. @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? as the separator. Httpbin.org - a website and diagnosis tool which converts Http GET request data into a JSON response; Step 1: Create a project. This predicates matches the Host header that matches the pattern. It may be the integer value 404 or the string representation of the enumeration: NOT_FOUND. This lets you match on anything from the HTTP request, such as headers or parameters. See the Spring Cloud Project page for details on setting up your build system with the current Spring Cloud Release Train. Modifying the Way Remote Addresses Are Resolved, 5.12. URI variables may be used in the value and will be expanded at runtime. 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. There is an abstract class called AbstractRoutePredicateFactory which you can extend. It uses the Netty HttpClient to make the downstream proxy request. 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 /gateway actuator endpoint lets you monitor and interact with a Spring Cloud Gateway application. The following listing configures a SetStatus GatewayFilter: In either case, the HTTP status of the response is set to 401. This filter adds a timer metric named spring.cloud.gateway.requests with the following tags: routeUri: The URI to which the API is routed. Configure for High Availability. 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. httpStatusCode: The HTTP Status of the request returned to the client. None of the prior documentation applies to what follows. The maxSize is a DataSize type, so values can be defined as a number followed by an optional DataUnit suffix such as 'KB' or 'MB'. You can configure the gateway to create routes based on services registered with a DiscoveryClient compatible service registry. 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 primary scenario is to use the fallbackUri to define an internal controller or handler within the gateway application. The filter also looks in the ServerWebExchangeUtils.GATEWAY_SCHEME_PREFIX_ATTR attribute to see if it equals lb. application.yml. The resulting response is similar to the following: The response contains the details of all the routes defined in the gateway. The following example shows how to do so: The SetPath GatewayFilter factory takes a path template parameter. The previous sample defines the Cookie Route Predicate Factory with two arguments, the cookie name, mycookie and the value to match mycookievalue. So a request to /hello is sent to /mypath/hello. The default request size is set to five MB if not provided as a filter argument in the route definition. The status parameter should be a 300 series redirect HTTP code, such as 301. It is the permissible size limit of the request defined in bytes. This interface and its usage are subject to change in future milestone releases. Spring Cloud Zuul is one of the core components of Spring Cloud Netflix subproject. Currently, only forward: schemed URIs are supported. The Cookie route predicate factory takes two parameters, the cookie name and a regexp (which is a Java regular expression). If you would like us to look at this issue, please provide the requested information. The following example configures such a fallback: The following listing does the same thing in Java: This example forwards to the /inCaseofFailureUseThis URI when the circuit breaker fallback is called. The following example configures an SetResponseHeader GatewayFilter that uses a variable: The SetStatus GatewayFilter factory takes a single parameter, status. URIs defined in routes without a port get default port values of 80 and 443 for the HTTP and HTTPS URIs, respectively. When using the retry filter with any HTTP method with a body, the body will be cached and the gateway will become memory constrained. If two hops of trusted infrastructure are required before Spring Cloud Gateway is accessible, then a value of 2 should be used. Various properties can be specified inside your application.properties file, inside your application.yml file, or as command line switches. The url parameter should be a valid URL. ServerWebExchangeUtils.setAlreadyRouted takes a ServerWebExchange object and marks it as routed. The following listing configures a SetRequestHostHeader GatewayFilter: The SetRequestHostHeader GatewayFilter factory replaces the value of the host header with example.org. return r.host("*.somehost.org").and().path("/somepath") For the external controller/handler scenario, headers can be added with exception details. By using the fluent Java API, you can use the and(), or(), and negate() operators on the Predicate class. Spring Cloud Gateway 1AddRequestHeader GatewayFilter Factory2AddRequestParameter GatewayFilter Factory3AddResponseHeader GatewayFilter Factory4DedupeResponseHeader GatewayFilter Fa. 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. URI variables may be used in the value and are expanded at runtime. 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 route configuration allows applying CORS directly to a route as metadata with key cors. The protocolsRegex parameter must be a valid regex String, against which the protocol name is matched. You can configure Spring Cloud Gateway for Kubernetes to run multiple instances in High Availability as you would do with a normal Kubernetes resource. /resource). The SetRequestHeader GatewayFilter factory takes name and value parameters. First-class support is provided for sensitive headers (by default, cookie and authorization), which are not passed downstream, and for proxy (x-forwarded-*) headers. Well occasionally send you account related emails. Generally, it will put the identity information into the request header and will not modify the content of the request and response. You can extend an abstract class called AbstractGatewayFilterFactory. To remove any kind of sensitive header, you should configure this filter for any routes for which you may want to do so. All. Spring Cloud Gateway comes with one non-default remote address resolver that is based off of the X-Forwarded-For header, XForwardedRemoteAddressResolver. Red Hat 3scale provides a method for adding custom policies, but does not support custom policies. aws api gateway parameter mapping. The unmodified original URL is appended to the list in the ServerWebExchangeUtils.GATEWAY_ORIGINAL_REQUEST_URL_ATTR attribute. The following example configures a XForwardedRemoteAddr route predicate: This route matches if the X-Forwarded-For header contains, for example, 192.168.1.10. Spring Cloud has it's own way of defining Feign clients, it's done with Spring MVC annotations. You must use $\ to mean $ because of the YAML specification. To see the list of all Spring Cloud Gateway related configuration properties, see the appendix. Tripping The Circuit Breaker On Status Codes, 12.4.1. 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. 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. For each factory there is a string representation of the corresponding object (for example, [[emailprotected] configClass = Object]). To change this, set the spring.cloud.gateway.filter.remove-hop-by-hop.headers property to the list of header names to remove. This may not match the actual client IP address if Spring Cloud Gateway sits behind a proxy layer. The following listing configures a filter chain: To enable gateway 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. Easy to extend and/or customize using standard Spring patterns The following example configures a PrefixPath GatewayFilter: This prefixes /mypath to the path of all matching requests. Multiple matching segments are allowed. .build(); The reason the filters are divided by the dotted line is that filters can run logic both before and after the proxy request is sent. To include Spring Cloud Gateway in your project, use the starter with a group ID of org.springframework.cloud and an artifact ID of spring-cloud-starter-gateway. This predicate matches cookies that have the given name and whose values match the regular expression. The following headers (shown with their default values) are added: Strict-Transport-Security (max-age=631138519), Content-Security-Policy (default-src 'self' https:; font-src 'self' https: data:; img-src 'self' https: data:; object-src 'none'; script-src https:; style-src 'self' https: 'unsafe-inline)'. The following example configures a weight route predicate: This route would forward ~80% of traffic to weighthigh.org and ~20% of traffic to weighlow.org. The following example configures a KeyResolver in Java: This defines a request rate limit of 10 per user. The Spring Cloud CircuitBreaker filter can also accept an optional fallbackUri parameter. When setting the You can also manipulate response headers (and anything else you like in the response) by adding a mapper to the get() method (and other methods). The predicates defined by RouteDefinitionLocator beans are combined using logical and. From the drop down, choose Mapping template and copy and paste the mapping template text below into the Template input box. The JSONToGRPCFilter GatewayFilter Factory converts a JSON payload to a gRPC request. In Puma (RubyGem) before 4.3.3 and 3.12.4, if an application using Puma allows untrusted input in an early-hints header, an attacker can use a carriage return character to end the header and inject malicious content, such as additional headers or an entirely new response body. You can adjust this behavior by setting the spring.cloud.gateway.filter.request-rate-limiter.deny-empty-key (true or false) and spring.cloud.gateway.filter.request-rate-limiter.empty-key-status-code properties. The PreserveHostHeader GatewayFilter factory has no parameters. return routeBuilder.routes() When communicating over HTTPS, the client initiates a TLS handshake. Those values are then available for use by GatewayFilter factories. 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 ? Getting the refreshTokenMono is webclient call which is in a different service.. By the time it gives the response, main response is already about to commit and wont allow us to modify the response headers. It supports basic downstream HTTP exchanges through methods that mirror the HTTP verbs. The SaveSession GatewayFilter factory forces a WebSession::save operation before forwarding the call downstream. 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. 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. You can use the ModifyRequestBody filter to modify the request body before it is sent downstream by the gateway. This filter also automatically calculates the. In this situation, the SetRequestHostHeader GatewayFilter factory can replace the existing host header with a specified value. In configuration, you can reference the bean by name using SpEL. 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. If the URL located in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute has a ws or wss scheme, the websocket routing filter runs. #{@myRateLimiter} is a SpEL expression that references a bean with named myRateLimiter. Typically, there will be a name key and an args key. In future milestone releases, there will be some KeyResolver implementations. If the fallback is called, the request is forwarded to the controller matched by the URI. SetRequestHeader is aware of URI variables used to match a path or host. The following listing defines a rate limiter that uses the KeyResolver defined in the previous listing: The RewriteLocationResponseHeader GatewayFilter factory modifies the value of the Location response header, usually to get rid of backend-specific details. The following example configures an RemoveJsonAttributesResponseBody GatewayFilter: This removes attributes "id" and "color" from the JSON content body at root level. 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 request returns a 200 without a response body. 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 redis-rate-limiter.replenishRate property defines how many requests per second to allow (without any dropped requests). Then the proxy request is made. You can read more about them in the. You can load-balance websockets by prefixing the URI with lb, such as lb:ws://serviceid. The Host route predicate factory takes one parameter: a list of host name patterns. if. The global CORS configuration is a map of URL patterns to Spring Framework CorsConfiguration. The Path Route Predicate Factory takes two parameters: a list of Spring PathMatcher patterns and an optional flag called matchTrailingSlash (defaults to true). SetResponseHeader is aware of URI variables used to match a path or host. or check if an exchange has already been routed. For relative redirects, you should use uri: no://op as the uri of your route definition. GitHub spring-cloud / spring-cloud-gateway Public Notifications Fork 2.9k Star 3.9k Code Issues 337 Pull requests 39 Actions Projects Security Insights New issue How to modify spring cloud gateway response headers #1092 Closed To add a filter and apply it to all routes, you can use spring.cloud.gateway.default-filters. To configure Global http timeouts: Have a question about this project? Configuring Predicates and Filters For, 15.4. 1050. 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. 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). 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. Sumant Rana 77 Followers Embark on a cloud native journey Follow More from Medium The body is cached in a request attribute defined by. This is useful when you try to support CORS preflight requests and your route predicate does not evaluate to true because the HTTP method is options. The following listing configures a RequestHeaderSize GatewayFilter: This will send a status 431 if size of any request header is greater than 1000 Bytes. .route("test1", r -> { The default is http|https|ftp|ftps. The default filter is a rewrite path filter with the regex /serviceId/?(?
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