it is proxying. .metadata(CONNECT_TIMEOUT_ATTR, 200); This filter also implements the automatic calculation of the max-age value in the HTTP Cache-Control header. If the fallback is called, the request is forwarded to the controller matched by the URI. To enable this for Spring Cloud Gateway add the following dependencies, org.springframework.boot:spring-boot-starter-oauth2-client. In future milestone releases, there will be some KeyResolver implementations. The following properties are available: To disable the default values set the spring.cloud.gateway.filter.secure-headers.disable property with comma-separated values. There is an abstract class called AbstractRoutePredicateFactory which you can extend. SetRequestHeader is aware of URI variables used to match a path or host. NEVER_STRIP: The version is not stripped, even if the original request path contains no version. By default, it creates a NettyChannel by using the default TrustManagerFactory. An is created through a . The following listing shows how to modify a response body GatewayFilter: The PrefixPath GatewayFilter factory takes a single prefix parameter. If two hops of trusted infrastructure are required before Spring Cloud Gateway is accessible, then a value of 2 should be used. Spring Cloud Gateway matches routes as part of the Spring WebFlux HandlerMapping infrastructure. return r.host("*.somehost.org").and().path("/somepath") 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. Since 4.0.0, Spring Cloud Gateway supports Spring AOT transformations and native images. This filter configures the local response cache per route and is available only if the spring.cloud.gateway.filter.local-response-cache.enabled property is enabled. Reactor Netty HttpClient Wiretap Logs missing from tracing #2730 - GitHub org.springframework.beans.factory.annotation.Value, org.springframework.context.annotation.Bean, org.springframework.context.annotation.Configuration, org.springframework.http.client.reactive.ReactorClientHttpConnector, org.springframework.web.reactive.function.client.WebClient, reactor.netty.transport.logging.AdvancedByteBufFormat, org.springframework.boot.autoconfigure.condition.ConditionalOnExpression, "#{environment.getProperty('debug') != null && environment.getProperty('debug') != 'false'}", turn this on depending on whether we're running in debug mode, https://www.jvt.me/posts/2022/02/13/log-webflux-client/, Creative Commons Attribution Non Commercial Share Alike 4.0 International, 4693e31b7f on Wed, 02 Mar 2022 13:34:19 +0000. To delete a route definition, make a DELETE request to /gateway/routes/{id_route_to_delete}. The HTTP Client was added in Java 11. For relative redirects, you should use uri: no://op as the uri of your route definition. The builder can be used to configure per-client state, like: the preferred protocol version ( HTTP/1.1 or HTTP/2 ), whether to follow redirects, a proxy, an authenticator, etc. Displays the list of routes defined in the gateway. .route("test1", r -> { Spring Cloud Gateway Multiple matching segments are allowed. And a local response cache configured globally is also available as feature. Retries are performed after a backoff interval of firstBackoff * (factor ^ n), where n is the iteration. So, if the downstream server responded with X-Request-Red:1234, it will be replaced with X-Request-Red:Blue, which is what the downstream service would receive. 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. To allow for simple configuration in Java, the RouteLocatorBuilder bean includes a fluent API. The following listing shows how to add local response cache GatewayFilter: The MapRequestHeader GatewayFilter factory takes fromHeader and toHeader parameters. value or the String representation of the HttpStatus enumeration. All of these predicates match on different attributes of the HTTP request. You can find more information on doing so in the FallbackHeaders GatewayFilter Factory section. To be remotely accessible, the endpoint has to be enabled and exposed over HTTP or JMX in the application properties. 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'. Asking for help, clarification, or responding to other answers. Writing Custom GatewayFilter Factories, 19.2.1. This allows more complex routing options, like forwarding sections of the original host or url path using PathPattern expression. I make the outbound http client like this: I would like to log the request and the response, hence, I am coding the following: (The WebClient implantation has been tested and working), And I have my logging level set to INFO with logging.level.root=INFO. The path part of the request URL is overridden with the path in the forward URL. This predicates matches the Host header that matches the pattern. Wire Tap Pattern The Wire Tap inspects messages that travel on a Point-to-Point Channel. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 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. (There is also an experimental WebClientHttpRoutingFilter that performs the same function but does not require Netty. Then, by default, the gateway metrics filter runs as long as the spring.cloud.gateway.metrics.enabled property is not set to false. WebClient WebClient is a reactive and non-blocking interface for HTTP requests, based on Spring WebFlux. You can extend an abstract class called AbstractGatewayFilterFactory. Java HttpClient With SSL | Baeldung 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). This filter works only with HTTP (including HTTPS) requests. How "wide" are absorption and emission lines? An HTTP Client. 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). exceptions: A list of thrown exceptions that should be retried. Logging Spring WebClient Calls | Baeldung Spring Cloud Gateway requires the Netty runtime provided by Spring Boot and Spring Webflux. We can do this by taking a configuration for our WebClient: Then, to turn on our debug logging, we can provide an HttpClient that has been wiretap'd: The wiretap takes note of logging interfaces on the classpath, and for instance will use SLF4J if it finds it available, so logs will go to the location and format you want them in. Custom HTTP Header With the Java HttpClient | Baeldung Internally, materialization happens in three phases, first #tcpConfiguration()is called to retrieve a ready to use TcpClient, then TcpClient#configure() retrieve a usable Bootstrap for the final . 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. Spring Cloud CircuitBreaker supports multiple libraries that can be used with Spring Cloud Gateway. A utility method (called get) is available to make access to these variables easier. Multiplication implemented in c++ with constant time. 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. #spring-boot The following example configures a RemoveRequestParameter GatewayFilter: This will remove the red parameter before it is sent downstream. If matchTrailingSlash is set to false, then request path /red/1/ will not be matched. The gateway can listen for requests on HTTPS by following the usual Spring server configuration. You can customize the way that the remote address is resolved by setting a custom RemoteAddressResolver. This pattern allows us to intercept the messages without permanently consuming them off the channel. The following example configures a before route predicate: This route matches any request made before Jan 20, 2017 17:42 Mountain Time (Denver). This interface and its usage are subject to change in future milestone releases. The status parameter should be a 300 series redirect HTTP code, such as 301. By default, if the KeyResolver does not find a key, requests are denied. 7 Quick question regarding Java Spring Webflux WebClient and the wiretap logging please. This project provides an API Gateway built on top of the Spring Ecosystem, including: Spring 6, Spring Boot 3 and Project Reactor. Once built, an is immutable, and can be used to send . It is defined by an ID, a destination URI, a collection of predicates, and a collection of filters. ServerWebExchangeUtils.setAlreadyRouted takes a ServerWebExchange object and marks it as routed. 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. To learn more, see our tips on writing great answers. import static org.springframework.cloud.gateway.support.RouteMetadataUtils.CONNECT_TIMEOUT_ATTR; We can use Java HttpClient to make synchronous and asynchronous requests, convert requests and responses, add timeouts, etc. The weights are calculated per group. CacheRequestBody then places it in the attributes available from ServerWebExchange.getAttributes(), with a key defined in ServerWebExchangeUtils.CACHED_REQUEST_BODY_ATTR. The stripVersionMode parameter has the following possible values: NEVER_STRIP, AS_IN_REQUEST (default), and ALWAYS_STRIP. 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. Route: The basic building block of the gateway. The default is 'B' for bytes. URI variables may be used in the value and are expanded at runtime. Wire Tap Enterprise Integration Pattern | Baeldung Unfortunately, I am not seeing any extra logs. The following example configures a PrefixPath GatewayFilter: This prefixes /mypath to the path of all matching requests. If the URL has a forward scheme (such as forward:///localendpoint), it uses the Spring DispatcherHandler to handle the request. There are two ways to configure predicates and filters: shortcuts and fully expanded arguments. Then, by default, the metrics will be available as long as the property spring.cloud.gateway.metrics.enabled is set to true. 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. The following example configures a Spring Cloud CircuitBreaker GatewayFilter: To configure the circuit breaker, see the configuration for the underlying circuit breaker implementation you are using. (Ep. This route predicate allows requests to be filtered based on the X-Forwarded-For HTTP header. The Host route predicate factory takes one parameter: a list of host name patterns. connect-timeout must be specified in milliseconds. 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. keyResolver is a bean that implements the KeyResolver interface. The following listing shows the definition of the RouteDefinitionLocator interface: By default, a PropertiesRouteDefinitionLocator loads properties by using Spring Boots @ConfigurationProperties mechanism. essentially skipping the filter. The following example configures a between route predicate: This route matches any request made after Jan 20, 2017 17:42 Mountain Time (Denver) and before Jan 21, 2017 17:42 Mountain Time (Denver). The following example configures an AddRequestParameter GatewayFilter that uses a variable: The AddResponseHeader GatewayFilter Factory takes a name and value parameter. A gauge metric named spring.cloud.gateway.routes.count will be added, whose value is the number of RouteDefinitions. Tripping The Circuit Breaker On Status Codes, 14.1. The RemoveRequestParameter GatewayFilter factory takes a name parameter. This metric will be available from /actuator/metrics/spring.cloud.gateway.routes.count. Overview In this tutorial, we are going to show how to customize Spring's WebClient - a reactive HTTP client - to log requests and responses. Customize HTTP Headers. I try to get back to everything, if I don't reply in a couple of weeks, feel free to give me a nudge! 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. This applies the filter to all requests. The DedupeResponseHeader filter also accepts an optional strategy parameter. The After route predicate factory takes one parameter, a datetime (which is a java ZonedDateTime). any logback.xml file somewhere that would override the config ? 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. Some situations necessitate reading the request body. There are convenience methods that you can use to mark an exchange as routed Method SEARCH: Package org.springframework.integration.channel.interceptor Class WireTap java.lang.Object org.springframework.integration.channel.interceptor.WireTap All Implemented Interfaces: Aware, BeanFactoryAware, Lifecycle, VetoCapableInterceptor, ManageableLifecycle, ChannelInterceptor the request should only be allowed if it comes from a trusted list of IP addresses used by those The Between route predicate factory takes two parameters, datetime1 and datetime2 This approach is vulnerable to spoofing, as a malicious client could set an initial value for the X-Forwarded-For, which would be accepted by the resolver. . The default request size is set to five MB if not provided as a filter argument in the route definition. These are basic guides to writing some custom components of the gateway. 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. The API implements the client-side of the most recent HTTP standards. extracts an access token from the currently authenticated user, It provides a convenient method to apply a transformation to JSON body content by deleting attributes from it. 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)'. See the Spring Cloud Project page for details on setting up your build system with the current Spring Cloud Release Train. 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. This filter adds a timer metric named spring.cloud.gateway.requests with the following tags: routeUri: The URI to which the API is routed. AddRequestParameter is aware of the URI variables used to match a path or host. If the URL located in the ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR exchange attribute has a ws or wss scheme, the websocket routing filter runs. 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. You can also define a rate limiter as a bean that implements the RateLimiter interface. The following example configures a KeyResolver in Java: This defines a request rate limit of 10 per user. The following example configures an AddRequestParameter GatewayFilter: This will add red=blue to the downstream requests query string for all matching requests. 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"). status codes that if returned will cause the circuit breaker to be tripped. spring.cloud.gateway.filter.local-response-cache.time-to-live Sets the time to expire a cache entry (expressed in s for seconds, m for minutes, and h for hours). This filter also automatically calculates the. The filter takes a maxSize parameter. By default, when a service instance cannot be found by the, Gateway supports all the LoadBalancer features. A Token Relay is where an OAuth2 consumer acts as a Client and It supports HTTP/1.1 and HTTP/2, both synchronous and asynchronous programming models. For a full working sample see this project. Control two leds with only one PIC output. 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. The only issue is that I am not seeing any of the wiretap logs. Creating multiple Route Definitions, 17.9. https://www.jvt.me/posts/2022/02/13/log-webflux-client/ Therefore, it can be utilized directly without needing Spring's interfaces. Java HttpClient. Configuring Predicates and Filters For, 17.4. XForwardedRemoteAddressResolver has two static constructor methods, which take different approaches to security: XForwardedRemoteAddressResolver::trustAll returns a RemoteAddressResolver that always takes the first IP address found in the X-Forwarded-For header. Conclusion. Please note the log level is info, the wiretap is also info. The ReactiveLoadBalancerClientFilter looks for a URI in the exchange attribute named ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR. statuses: The HTTP status codes that should be retried, represented by using org.springframework.http.HttpStatus. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. . There may be cases that you need to add debug logging to investigate requests over the wire, for instance to debug things locally. 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. Want to get in touch? Once a request has been marked as routed, other routing filters will not route the request again, What should I do? 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. If the input header does not exist, the filter has no impact. The route definitions will be discarded if any route raises an error during the creation of the routes. on Sun, 13 Feb 2022 10:01:17 UTC, and last updated on Wed, 02 Mar 2022 13:34:19 UTC. httpStatusCode: The HTTP Status of the request returned to the client. The resulting response is similar to the following: The following table describes the structure of the response: The collection of route predicates. AddResponseHeader is aware of URI variables used to match a path or host. You can use the ModifyRequestBody filter to modify the request body before it is sent downstream by the gateway. This section covers common problems that may arise when you use Spring Cloud Gateway. Otherwise, the original value in the client request is sent. The preceding route matches if the request contained a red query parameter whose value matched the gree. This combined filter chain is sorted by the org.springframework.core.Ordered interface, which you can set by implementing the getOrder() method. regexp, so green and greet would match. TcpClient.wiretap (Showing top 20 results out of 315) The filter also looks in the ServerWebExchangeUtils.GATEWAY_SCHEME_PREFIX_ATTR attribute to see if it equals lb. When communicating over HTTPS, the client initiates a TLS handshake. If it is not matched, the filter does nothing. To configure per-route timeouts: You can read more about them in the. The RemoteAddr 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). Apache-2.0 2 mins Adding a Wiretap to a Spring WebFlux WebClient to Log All Request/Response Data If you're working with Spring Boot Webflux, you'll likely be using the WebClient as your HTTP client. To configure Global http timeouts: The first one is the Java HttpClient Basic Authentication | Baeldung and puts it in a request header for the downstream requests. The Java HttpClient API was introduced with Java 11. The following examples show how to set up global pre- and post-filters, respectively: Spring Cloud Gateway provides a utility object called ProxyExchange. A per-route response-timeout with a negative value will disable the global response-timeout value. You can use it inside a regular Spring web handler as a method parameter.

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