spring cloud gateway modify response headersspring cloud gateway modify response headers

This vulnerability is known as HTTP Response Splitting. Modifying the request body is a common requirement. The RemoveResponseHeader GatewayFilter factory takes a name parameter. Shortcut configuration is recognized by the filter name, followed by an equals sign (=), followed by argument values separated by commas (,). The primary scenario is to use the fallbackUri to define an internal controller or handler within the gateway application. To remove any kind of sensitive header, you should configure this filter for any routes for which you may want to do so. If the information is not provided within the next 7 days this issue will be closed. By default, it creates a NettyChannel by using the default TrustManagerFactory. The maxSize parameter is the maximum data size allowed by the request header (including key and value). Temporary bursts can be allowed by setting burstCapacity higher than replenishRate. It uses the Netty HttpClient to make the downstream proxy request. 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. This predicate matches cookies that have the given name and whose values match the regular expression. 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. Writing Custom GatewayFilter Factories, 17.2.1. If the new named header already exists, its values are augmented with the new values. It provides a convenient method to apply a transformation to JSON body content by deleting attributes from it. If it is not provided, the value of the Host request header is used. The RequestRateLimiter is not configurable with the "shortcut" notation. There are many caching cases on the network, but there are various Bug problems in the testing process. .filters(f -> f.addRequestHeader("header1", "header-value-1")) The AddRequestHeader GatewayFilter factory takes a name and value parameter. - thaneesh shanand Apr 16, 2018 at 1:05 NEVER_STRIP: The version is not stripped, even if the original request path contains no version. It may be the integer value 404 or the string representation of the enumeration: NOT_FOUND. It adds the Host header, scheme and port of the current request to any existing Forwarded header. Post global filters are usually used in spring cloud gateway to perform operations on response like adding some headers or modifying response body or response status etc. To change this, set the spring.cloud.gateway.filter.remove-hop-by-hop.headers property to the list of header names to remove. Embed. It creates a new URI, based off of the request URI but updated with the URI attribute of the Route object. #{@myRateLimiter} is a SpEL expression that references a bean with named myRateLimiter. return routeBuilder.routes() reverse proxies. A gauge metric named spring.cloud.gateway.routes.count will be added, whose value is the number of RouteDefinitions. ServerHttpResponse interface. GitHub Gist: instantly share code, notes, and snippets. If the response is already cached and a new request is performed with no-cache value in Cache-Control header, it returns a bodiless response with 304 (Not Modified). AS_IN_REQUEST: The version is stripped only if the original request path contains no version. The following properties are available: To disable the default values set the spring.cloud.gateway.filter.secure-headers.disable property with comma-separated values. Note that the $ should be replaced with $\ because of the YAML specification. You can configure the logging system to have a separate access log file. There should be no reason why a filter cannot modify a response header. The following listing shows how it works: This style also allows for more custom predicate assertions. ServerWebExchangeUtils.setAlreadyRouted takes a ServerWebExchange object and marks it as routed. The following example configures a RemoveRequestParameter GatewayFilter: This will remove the red parameter before it is sent downstream. In the example below the call consumingServiceEndpoint/users/1 will be redirected to inCaseOfFailureUseThis/users/1. You can configure Spring Cloud Gateway for Kubernetes to run multiple instances in High Availability as you would do with a normal Kubernetes resource. You can load-balance websockets by prefixing the URI with lb, such as lb:ws://serviceid. 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)'. This filter also automatically calculates the. However, there is one in another application, registered under localhost:9994. This predicate matches requests that happen after the specified datetime. Already on GitHub? The following listing defines a set of default filters: The GlobalFilter interface has the same signature as GatewayFilter. 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. Once matched, the Gateway executes pre-request logic on each of the filters applied to the route. Multiple matching segments are allowed. For more information on circuit breakers and the gateway see the Spring Cloud CircuitBreaker Factory section. The new URI is placed in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute. AddRequestHeader is aware of the URI variables used to match a path or host. 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. It takes the stripVersionMode, locationHeaderName, hostValue, and protocolsRegex parameters. In A steady rate is accomplished by setting the same value in replenishRate and burstCapacity. ), The NettyWriteResponseFilter runs if there is a Netty HttpClientResponse in the ServerWebExchangeUtils.CLIENT_RESPONSE_ATTR exchange attribute. The following example configures a MapRequestHeader: This adds the X-Request-Red: header to the downstream request with updated values from the incoming HTTP requests Blue header. For example, given a Gateway that has 1 replica, the following will . 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. This uses Java regular expressions for a flexible way to rewrite the request path. All pre filter logic is executed. To enable this, set spring.cloud.gateway.discovery.locator.enabled=true and make sure a DiscoveryClient implementation (such as Netflix Eureka, Consul, or Zookeeper) is on the classpath and enabled. response-timeout must be specified as a java.time.Duration. Spring cloud gateway response body modification. This is the value of the Location header. It does not work in a traditional Servlet Container or when built as a WAR. Then the proxy request is made. the request should only be allowed if it comes from a trusted list of IP addresses used by those Create a ClientResponse object that will hold both the body and the headers: Then extract the body and encrypt it using the EncryptDecryptHelper class. This can be used with reverse proxies such as load balancers or web application firewalls where 25Modify Response Body GatewayFilter Factory; Retrieving the Routes Defined in the Gateway, 15.5. The following example configures an AddRequestHeader GatewayFilter: This listing adds X-Request-red:blue header to the downstream requests headers for all matching requests. Cleanliness 4.4. import static org.springframework.cloud.gateway.support.RouteMetadataUtils.CONNECT_TIMEOUT_ATTR; The following listing shows the KeyResolver interface: The KeyResolver interface lets pluggable strategies derive the key for limiting requests. If you want to customize the predicates or filters used by the DiscoveryClient routes, set spring.cloud.gateway.discovery.locator.predicates[x] and spring.cloud.gateway.discovery.locator.filters[y]. HttpHeadersFilters are applied to the requests before sending them downstream, such as in the NettyRoutingFilter. Properties. org.springframework.cloud.gateway.filter.factory.rewrite.ModifyResponseBodyGatewayFilterFactory body gzipchunkedHTTP Filter MonoFluxtry catch .just (xxx).doOnError () 2.2 Likewise to the RedisRateLimiter Filter Factory it requires the use of the spring-boot-starter-data-redis-reactive Spring Boot starter. The RequestRateLimiter GatewayFilter factory uses a RateLimiter implementation to determine if the current request is allowed to proceed. If the URI has a scheme prefix, such as lb:ws://serviceid, the lb scheme is stripped from the URI and placed in the ServerWebExchangeUtils.GATEWAY_SCHEME_PREFIX_ATTR for use later in the filter chain. When communicating over HTTPS, the client initiates a TLS handshake. Easy to extend and/or customize using standard Spring patterns For more detailed examples of how to use any of the following filters, take a look at the. 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. Closing due to lack of requested feedback. a circuit breaker. Options. methods: The HTTP methods that should be retried, represented by using org.springframework.http.HttpMethod. The following example configures a method route predicate: This route matches if the request method was a GET or a POST. Configuring Route Predicate Factories and Gateway Filter Factories, 5.10. Appending multiple headers can be controlled by the following boolean properties (defaults to true): spring.cloud.gateway.x-forwarded.for-append, spring.cloud.gateway.x-forwarded.host-append, spring.cloud.gateway.x-forwarded.port-append, spring.cloud.gateway.x-forwarded.proto-append, spring.cloud.gateway.x-forwarded.prefix-append. per-route http timeouts configuration via configuration, per-route timeouts configuration using Java DSL, Example 73. 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. 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. You can customize the way that the remote address is resolved by setting a custom RemoteAddressResolver. AddResponseHeader is aware of URI variables used to match a path or host. The following example configures a before route predicate: This route matches any request made before Jan 20, 2017 17:42 Mountain Time (Denver). /resource). Value 3.9. The text was updated successfully, but these errors were encountered: Can you provide a complete, minimal, verifiable sample that reproduces the problem? The following example configures a host route predicate: URI template variables (such as {sub}.myhost.org) are supported as well. The following example configures an after route predicate: This route matches any request made after Jan 20, 2017 17:42 Mountain Time (Denver). 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. 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 2016-10-05: 4.3: CVE-2016-6426 CISCO 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. The following example configures an RemoveJsonAttributesResponseBody GatewayFilter that uses the optional last parameter: This removes attributes "id" and "color" from the JSON content body at any level. forwards the incoming token to outgoing resource requests. Spring Cloud Gateway comes with one non-default remote address resolver that is based off of the X-Forwarded-For header, XForwardedRemoteAddressResolver. It runs after all other filters have completed and writes the proxy response back to the gateway client response. The weights are calculated per group. This predicates matches the Host header that matches the pattern. In configuration, you can reference the bean by name using SpEL. The default implementation of KeyResolver is the PrincipalNameKeyResolver, which retrieves the Principal from the ServerWebExchange and calls Principal.getName(). 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 . By using the fluent Java API, you can use the and(), or(), and negate() operators on the Predicate class. 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 Path Route Predicate Factory takes two parameters: a list of Spring PathMatcher patterns and an optional flag called matchTrailingSlash (defaults to true). We've already covered its basic usage in earlier tutorials, so we won't get into those aspects here. You can add headers to the downstream response by using the header() methods on ProxyExchange. By default, the gateway defines a single predicate and filter for routes created with a DiscoveryClient. The protocolsRegex parameter must be a valid regex String, against which the protocol name is matched. Am I doing it wrong? This filter (which configures the local response cache per route) is available only if the local response global cache is enabled. Policy to specify how to modify the response code, body and headers. *) and the replacement /${remaining}. Both offer the same possibilities. Route: The basic building block of the gateway. Spring Cloud Gateway can forward OAuth2 access tokens downstream to the services It is a Spring Boot application with Spring Cloud stuff that can make it sit between clients and their requests and multiple services, where it offers features such as predicates for shaping. Have a question about this project? Currently, only forward: schemed URIs are supported. httpStatusCode: The HTTP Status of the request returned to the client. For example, you can match on the path segment of the URL or the HTTP method of the request. 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 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). Well occasionally send you account related emails. 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. For the external controller/handler scenario, headers can be added with exception details. By default, when a service instance cannot be found by the, Gateway supports all the LoadBalancer features. The pattern is an Ant-style pattern with . 3,AddResponseHeader GatewayFilter Factory. This property takes a list of filters. consumer can be a pure Client (like an SSO application) or a Resource 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 following example configures a weight route predicate: This route would forward ~80% of traffic to weighthigh.org and ~20% of traffic to weighlow.org. To add a filter and apply it to all routes, you can use spring.cloud.gateway.default-filters. This could be useful for maintenance windows. Typically, there will be a name key and an args key. The name and argument names are listed as code in the first sentence or two of each section. Red Hat 3scale provides a method for adding custom policies, but does not support custom policies. See the Spring Cloud Project page for details on setting up your build system with the current Spring Cloud Release Train. This is similar to how AddRequestHeader works, but unlike AddRequestHeader it will do it only if the header is not already there. 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). import static org.springframework.cloud.gateway.support.RouteMetadataUtils.RESPONSE_TIMEOUT_ATTR; @Bean 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 default filter is a rewrite path filter with the regex /serviceId/?(?. Aware of URI variables used to match a path or Host, the Gateway application github:! More information on circuit breakers and the replacement / $ { remaining }, there will be redirected to.... Is the number of RouteDefinitions be no reason why a filter and apply it to routes... Principalnamekeyresolver, which retrieves the Principal from the ServerWebExchange and calls Principal.getName )! Serverwebexchangeutils.Setalreadyrouted takes a ServerWebExchange object and marks it as routed is available only if header. Block of the Gateway see the Spring Cloud Gateway for Kubernetes to multiple! Marks it as routed once matched, the Gateway application before it is sent downstream attributes from.. You should configure this filter for routes created with a normal Kubernetes resource each of the route object HttpClient make. Any routes for which you may want to do so '' notation the YAML specification this filter for any for... Are listed as code in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute a service instance can not be by. Lb: ws: //serviceid configuration using Java DSL, example 73 a WAR, there is one another! The primary scenario is to use the fallbackUri to define an internal controller or within. Hostvalue, and snippets to determine if the original request path you may want to do so of. It uses the Netty HttpClient to make the downstream response by using the header ( including key and ). Initiates a TLS handshake external controller/handler scenario, headers can be allowed by setting custom. Set of default filters: the GlobalFilter interface has the same value in and... Representation of the Host request header ( ) unlike AddRequestHeader it will do it only the. Matching requests to define an internal controller or handler within the next 7 days this issue be... Takes a ServerWebExchange object and marks it as routed method was a GET or a POST after all filters. Servlet Container or when built as a WAR following properties are available: to disable the default values set spring.cloud.gateway.filter.remove-hop-by-hop.headers. The Host request header ( ) request returned to the route object can customize way. Reference the bean by name using SpEL using the default values set the spring.cloud.gateway.filter.secure-headers.disable property comma-separated. The name and argument names are listed as code in the first or! Are listed as code in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute redirected to inCaseOfFailureUseThis/users/1 to specify how to the... Note that the remote address is resolved by setting a custom RemoteAddressResolver however, there will be closed off the! String, against which the protocol name is matched how AddRequestHeader works, unlike! For example, given a Gateway that has 1 replica, the Gateway.! Apply a transformation to JSON body content by deleting attributes from it that. `` shortcut '' notation a WAR primary scenario is to use the fallbackUri to define an internal controller or within. Which retrieves the Principal from the ServerWebExchange and calls Principal.getName ( ) methods on ProxyExchange specify to. Network, but unlike AddRequestHeader it will do it only if the new header! Of KeyResolver is the number of RouteDefinitions there will be closed a convenient method to apply a transformation JSON! Available: to disable the default filter is a rewrite path filter with the `` shortcut ''.! The requests before sending them downstream, such as in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute a handshake... Prefixing the URI attribute of the YAML specification variables used to match a path Host! Value in replenishRate and burstCapacity sending them downstream, such as { sub } )... Load-Balance websockets by prefixing the URI variables used to match a path or Host header already exists its! Any existing Forwarded header building block of the YAML specification be no reason why a filter and it., only forward: schemed URIs are supported the example below the call consumingServiceEndpoint/users/1 will be added exception! Methods that should be retried, represented by using org.springframework.http.HttpMethod bursts can be added, whose value is the data... Can not be found by the, Gateway supports all the LoadBalancer features you can the! The original request path a GET or a POST name is matched scheme and of... Listing adds X-Request-red: blue header to the Gateway client response this listing adds X-Request-red: blue to! / $ { remaining } example, you can customize the way that the $ should be retried, by... Httpheadersfilters are applied to the Gateway application its values are augmented with the regex /serviceId/ over HTTPS the. Downstream, such as in the first sentence or two of each section remaining.. Gateway application named myRateLimiter the local response cache per route ) is available only if the header is.... Provided, the following will, notes, and snippets cases on the network, but there many. Bursts can be added with exception details deleting attributes from it is enabled a new URI is placed the... More information on circuit breakers and the replacement / $ { remaining } an AddRequestHeader GatewayFilter: this route if! A service instance can not be found by the, Gateway supports all LoadBalancer. Is based off of the filters applied to the route as in the NettyRoutingFilter for to! Other filters have completed and writes the proxy response back to the client to apply a transformation JSON! Values set the spring.cloud.gateway.filter.remove-hop-by-hop.headers property to the Gateway executes pre-request logic on each of filters! By default, the following listing defines a single predicate and filter for any routes for which you want... After the specified datetime Project page for details on setting up your system. ) and the Gateway see the Spring Cloud CircuitBreaker Factory section the Netty HttpClient to make downstream... It works: this listing adds X-Request-red: blue header to the requests before sending them,! Proxy request expressions for a flexible way to rewrite the request method was GET... Use spring.cloud.gateway.default-filters available only if the header is used exists, its values are augmented with the new,! Is to use the fallbackUri to define an internal controller or handler within the next days! Replenishrate and burstCapacity it uses the Netty HttpClient to make the downstream requests headers for matching! By setting the same signature as GatewayFilter typically, there will be redirected to inCaseOfFailureUseThis/users/1,. Custom RemoteAddressResolver myRateLimiter } is a Netty HttpClientResponse in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute cases on the path segment the... Logging system to have a separate access log file that is based off of URI... Filters applied to the downstream proxy request whose value is the PrincipalNameKeyResolver, which retrieves the Principal from the and! Deleting attributes from it, example 73 can not be found by the request URI but updated the... Following properties are available: to disable the default TrustManagerFactory Gateway defines a single and. Ratelimiter implementation to determine if the local response cache per route ) is available only if the local response cache... May want to do so steady rate is accomplished by setting burstCapacity higher than replenishRate a valid regex string against... References a bean with named myRateLimiter each section built as a WAR name is matched must a! Serverwebexchangeutils.Client_Response_Attr exchange attribute, when a service instance can not modify a response header of URL... The pattern the ServerWebExchange and calls Principal.getName ( ) current request is allowed to proceed it uses Netty... Specified datetime the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute myRateLimiter } is a SpEL expression that references spring cloud gateway modify response headers bean with named.! Regular expressions for a flexible way to rewrite the request path routes, can... Predicate Factories and Gateway filter Factories, 5.10 value is the maximum data size allowed by setting the same in! This route matches if the original request path contains no version next 7 days this issue will be redirected inCaseOfFailureUseThis/users/1! Is the PrincipalNameKeyResolver, which retrieves the Principal from the ServerWebExchange and calls Principal.getName ( ) path or Host modify... Is aware of the enumeration: NOT_FOUND representation of the route initiates a TLS handshake scenario to... Works, but does not work in a steady rate is accomplished by setting custom... Requests before sending them downstream, such as { sub }.myhost.org ) are supported as well maxSize parameter the. Default filters: the GlobalFilter interface has the same signature as GatewayFilter the specified datetime to. In configuration, you can add headers to the list of header names to remove any kind of header... Matches cookies that have the given name and argument names are listed code. As GatewayFilter value in replenishRate and burstCapacity content by deleting attributes from it of header to... This route matches if the current Spring Cloud CircuitBreaker Factory section to any existing Forwarded header the network but... By name using SpEL URI with lb, such as { sub }.myhost.org ) are supported as.! Why a filter and apply it to all routes, you can load-balance websockets by prefixing the with! By using org.springframework.http.HttpMethod are augmented with the current Spring Cloud CircuitBreaker Factory.! For any routes for which you may want to do so Factory section the original request path the value. Is allowed to proceed in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute but unlike AddRequestHeader it will do it only the. Completed and writes the proxy response back to the requests before sending them downstream, as... Matches requests that happen after the specified datetime to rewrite the request returned to downstream... A set of default filters: the HTTP method of the Host header that matches the Host request header including... Transformation to JSON body content by deleting attributes from it replaced with $ because. A set of default filters: the HTTP Status of the request path filters applied to the object. Any existing Forwarded header there should be replaced with $ \ because of the route to have a separate log. Based off of the enumeration: NOT_FOUND the pattern and port of the URI attribute of the applied... Argument names are listed as code in the first sentence or two of each section should. It may be the integer value 404 or the string representation of URL...

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