diff --git a/multi/multi__actuator_api.html b/multi/multi__actuator_api.html index c7849091..1bec8a09 100644 --- a/multi/multi__actuator_api.html +++ b/multi/multi__actuator_api.html @@ -1,3 +1,3 @@ - 8. Actuator API
8. Actuator API
Prev   Next

8. Actuator API

TODO: document the /gateway actuator endpoint

Prev   Next
7. Configuration Home 9. Developer Guide
\ No newline at end of file + 9. Actuator API
9. Actuator API
Prev   Next

9. Actuator API

TODO: document the /gateway actuator endpoint

Prev   Next
8. CORS Configuration Home 10. Developer Guide
\ No newline at end of file diff --git a/multi/multi__building_a_simple_gateway_using_spring_mvc_or_webflux.html b/multi/multi__building_a_simple_gateway_using_spring_mvc_or_webflux.html index 62e96e32..392add7c 100644 --- a/multi/multi__building_a_simple_gateway_using_spring_mvc_or_webflux.html +++ b/multi/multi__building_a_simple_gateway_using_spring_mvc_or_webflux.html @@ -1,6 +1,6 @@ - 10. Building a Simple Gateway Using Spring MVC or Webflux
10. Building a Simple Gateway Using Spring MVC or Webflux
Prev   

10. Building a Simple Gateway Using Spring MVC or Webflux

Spring Cloud Gateway provides a utility object called ProxyExchange which you can use inside a regular Spring web handler as a method parameter. It supports basic downstream HTTP exchanges via methods that mirror the HTTP verbs. With MVC it also supports forwarding to a local handler via the forward() method. To use the ProxyExchange just include the right module in your classpath (either spring-cloud-gateway-mvc or spring-cloud-gateway-webflux).

MVC example (proxying a request to "/test" downstream to a remote server):

@RestController
+   11. Building a Simple Gateway Using Spring MVC or Webflux
11. Building a Simple Gateway Using Spring MVC or Webflux
Prev   
11. Building a Simple Gateway Using Spring MVC or Webflux
Spring Cloud Gateway provides a utility object called ProxyExchange which you can use inside a regular Spring web handler as a method parameter. It supports basic downstream HTTP exchanges via methods that mirror the HTTP verbs. With MVC it also supports forwarding to a local handler via the forward() method. To use the ProxyExchange just include the right module in your classpath (either spring-cloud-gateway-mvc or spring-cloud-gateway-webflux).
MVC example (proxying a request to "/test" downstream to a remote server):
@RestController
 @SpringBootApplication
 public class GatewaySampleApplication {
 
@@ -28,4 +28,4 @@
 public ResponseEntity<?> proxyPath(ProxyExchange<byte[]> proxy) throws Exception {
   String path = proxy.path("/proxy/path/");
   return proxy.uri(home.toString() + "/foos/" + path).get();
-}
All the features of Spring MVC or Webflux are available to Gateway handler methods. So you can inject request headers and query parameters, for instance, and you can constrain the incoming requests with declarations in the mapping annotation. See the documentation for @RequestMapping in Spring MVC for more details of those features.
Headers can be added to the downstream response using the header() methods on ProxyExchange.
You can also manipulate response headers (and anything else you like in the response) by adding a mapper to the get() etc. method. The mapper is a Function that takes the incoming ResponseEntity and converts it to an outgoing one.
First class support is provided for "sensitive" headers ("cookie" and "authorization" by default) which are not passed downstream, and for "proxy" headers (x-forwarded-*).
Prev   
9. Developer Guide Home 

\ No newline at end of file
+}

All the features of Spring MVC or Webflux are available to Gateway handler methods. So you can inject request headers and query parameters, for instance, and you can constrain the incoming requests with declarations in the mapping annotation. See the documentation for @RequestMapping in Spring MVC for more details of those features.

Headers can be added to the downstream response using the header() methods on ProxyExchange.

You can also manipulate response headers (and anything else you like in the response) by adding a mapper to the get() etc. method. The mapper is a Function that takes the incoming ResponseEntity and converts it to an outgoing one.

First class support is provided for "sensitive" headers ("cookie" and "authorization" by default) which are not passed downstream, and for "proxy" headers (x-forwarded-*).

Prev   
10. Developer Guide Home 
\ No newline at end of file diff --git a/multi/multi__configuration.html b/multi/multi__configuration.html index a8eff1ec..109fa99f 100644 --- a/multi/multi__configuration.html +++ b/multi/multi__configuration.html @@ -1,6 +1,6 @@ - 7. Configuration
7. Configuration
Prev   Next

7. Configuration

Configuration for Spring Cloud Gateway is driven by a collection of `RouteDefinitionLocator`s.

RouteDefinitionLocator.java.  + 7. Configuration

7. Configuration
Prev   Next

7. Configuration

Configuration for Spring Cloud Gateway is driven by a collection of `RouteDefinitionLocator`s.

RouteDefinitionLocator.java.  

public interface RouteDefinitionLocator {
 	Flux<RouteDefinition> getRouteDefinitions();
 }

@@ -44,4 +44,4 @@ ) .build(); }

-

This style also allows for more custom predicate assertions. The predicates defined by RouteDefinitionLocator beans are combined using logical and. By using the fluent Java API, you can use the and(), or() and negate() operators on the Predicate class.

7.2 DiscoveryClient Route Definition Locator

The Gateway can be configured to create routes based on services registered with a DiscoveryClient compatible service registry.

To enable this, set spring.cloud.gateway.discovery.locator.enabled=true and make sure a DiscoveryClient implementation is on the classpath and enabled (such as Netflix Eureka, Consul or Zookeeper).

Prev   Next
6. Global Filters Home 8. Actuator API
\ No newline at end of file +

This style also allows for more custom predicate assertions. The predicates defined by RouteDefinitionLocator beans are combined using logical and. By using the fluent Java API, you can use the and(), or() and negate() operators on the Predicate class.

7.2 DiscoveryClient Route Definition Locator

The Gateway can be configured to create routes based on services registered with a DiscoveryClient compatible service registry.

To enable this, set spring.cloud.gateway.discovery.locator.enabled=true and make sure a DiscoveryClient implementation is on the classpath and enabled (such as Netflix Eureka, Consul or Zookeeper).

Prev   Next
6. Global Filters Home 8. CORS Configuration
\ No newline at end of file diff --git a/multi/multi__cors_configuration.html b/multi/multi__cors_configuration.html new file mode 100644 index 00000000..d8275075 --- /dev/null +++ b/multi/multi__cors_configuration.html @@ -0,0 +1,13 @@ + + + 8. CORS Configuration
8. CORS Configuration
Prev   Next

8. CORS Configuration

The gateway can be configured to control CORS behavior. The "global" CORS configuration is a map of URL patterns to Spring Framework CorsConfiguration.

application.yml.  +

spring:
+  cloud:
+    gateway:
+      globalcors:
+        corsConfigurations:
+          '[/**]':
+            allowedOrigins: "docs.spring.io"
+            allowedMethods:
+            - GET

+

In the example above, CORS requests will be allowed from requests that originate from docs.spring.io for all GET requested paths.

Prev   Next
7. Configuration Home 9. Actuator API
\ No newline at end of file diff --git a/multi/multi__developer_guide.html b/multi/multi__developer_guide.html index dd201149..60cfc995 100644 --- a/multi/multi__developer_guide.html +++ b/multi/multi__developer_guide.html @@ -1,6 +1,6 @@ - 9. Developer Guide
9. Developer Guide
Prev   Next

9. Developer Guide

TODO: overview of writing custom integrations

9.1 Writing Custom Route Predicate Factories

TODO: document writing Custom Route Predicate Factories

9.2 Writing Custom GatewayFilter Factories

In order to write a GatewayFilter you will need to implement GatewayFilterFactory. There is an abstract class called AbstractGatewayFilterFactory which you can extend.

PreGatewayFilterFactory.java.  + 10. Developer Guide

10. Developer Guide
Prev   Next

10. Developer Guide

TODO: overview of writing custom integrations

10.1 Writing Custom Route Predicate Factories

TODO: document writing Custom Route Predicate Factories

10.2 Writing Custom GatewayFilter Factories

In order to write a GatewayFilter you will need to implement GatewayFilterFactory. There is an abstract class called AbstractGatewayFilterFactory which you can extend.

PreGatewayFilterFactory.java.  

public class PreGatewayFilterFactory extends AbstractGatewayFilterFactory<PreGatewayFilterFactory.Config> {
 
 	public PreGatewayFilterFactory() {
@@ -47,4 +47,4 @@
 	}
 
 }

-

9.3 Writing Custom Global Filters

TODO: document writing Custom Global Filters

9.4 Writing Custom Route Locators and Writers

TODO: document writing Custom Route Locators and Writers

Prev   Next
8. Actuator API Home 10. Building a Simple Gateway Using Spring MVC or Webflux
\ No newline at end of file +

10.3 Writing Custom Global Filters

TODO: document writing Custom Global Filters

10.4 Writing Custom Route Locators and Writers

TODO: document writing Custom Route Locators and Writers

Prev   Next
9. Actuator API Home 11. Building a Simple Gateway Using Spring MVC or Webflux
\ No newline at end of file diff --git a/multi/multi_spring-cloud-gateway.html b/multi/multi_spring-cloud-gateway.html index 2c38906e..de657973 100644 --- a/multi/multi_spring-cloud-gateway.html +++ b/multi/multi_spring-cloud-gateway.html @@ -1,3 +1,3 @@ - Spring Cloud Gateway
Spring Cloud Gateway
   Next

Spring Cloud Gateway

Table of Contents

1. How to Include Spring Cloud Gateway
2. Glossary
3. How It Works
4. Route Predicate Factories
4.1. After Route Predicate Factory
4.2. Before Route Predicate Factory
4.3. Between Route Predicate Factory
4.4. Cookie Route Predicate Factory
4.5. Header Route Predicate Factory
4.6. Host Route Predicate Factory
4.7. Method Route Predicate Factory
4.8. Path Route Predicate Factory
4.9. Query Route Predicate Factory
4.10. RemoteAddr Route Predicate Factory
4.10.1. Modifying the way remote addresses are resolved
5. GatewayFilter Factories
5.1. AddRequestHeader GatewayFilter Factory
5.2. AddRequestParameter GatewayFilter Factory
5.3. AddResponseHeader GatewayFilter Factory
5.4. Hystrix GatewayFilter Factory
5.5. PrefixPath GatewayFilter Factory
5.6. PreserveHostHeader GatewayFilter Factory
5.7. RequestRateLimiter GatewayFilter Factory
5.7.1. Redis RateLimiter
5.8. RedirectTo GatewayFilter Factory
5.9. RemoveNonProxyHeaders GatewayFilter Factory
5.10. RemoveRequestHeader GatewayFilter Factory
5.11. RemoveResponseHeader GatewayFilter Factory
5.12. RewritePath GatewayFilter Factory
5.13. SaveSession GatewayFilter Factory
5.14. SecureHeaders GatewayFilter Factory
5.15. SetPath GatewayFilter Factory
5.16. SetResponseHeader GatewayFilter Factory
5.17. SetStatus GatewayFilter Factory
5.18. StripPrefix GatewayFilter Factory
5.19. Retry GatewayFilter Factory
6. Global Filters
6.1. Combined Global Filter and GatewayFilter Ordering
6.2. Forward Routing Filter
6.3. LoadBalancerClient Filter
6.4. Netty Routing Filter
6.5. Netty Write Response Filter
6.6. RouteToRequestUrl Filter
6.7. Websocket Routing Filter
6.8. Making An Exchange As Routed
7. Configuration
7.1. Fluent Java Routes API
7.2. DiscoveryClient Route Definition Locator
8. Actuator API
9. Developer Guide
9.1. Writing Custom Route Predicate Factories
9.2. Writing Custom GatewayFilter Factories
9.3. Writing Custom Global Filters
9.4. Writing Custom Route Locators and Writers
10. Building a Simple Gateway Using Spring MVC or Webflux
   Next
   
\ No newline at end of file + Spring Cloud Gateway
Spring Cloud Gateway
   Next

Spring Cloud Gateway

Table of Contents

1. How to Include Spring Cloud Gateway
2. Glossary
3. How It Works
4. Route Predicate Factories
4.1. After Route Predicate Factory
4.2. Before Route Predicate Factory
4.3. Between Route Predicate Factory
4.4. Cookie Route Predicate Factory
4.5. Header Route Predicate Factory
4.6. Host Route Predicate Factory
4.7. Method Route Predicate Factory
4.8. Path Route Predicate Factory
4.9. Query Route Predicate Factory
4.10. RemoteAddr Route Predicate Factory
4.10.1. Modifying the way remote addresses are resolved
5. GatewayFilter Factories
5.1. AddRequestHeader GatewayFilter Factory
5.2. AddRequestParameter GatewayFilter Factory
5.3. AddResponseHeader GatewayFilter Factory
5.4. Hystrix GatewayFilter Factory
5.5. PrefixPath GatewayFilter Factory
5.6. PreserveHostHeader GatewayFilter Factory
5.7. RequestRateLimiter GatewayFilter Factory
5.7.1. Redis RateLimiter
5.8. RedirectTo GatewayFilter Factory
5.9. RemoveNonProxyHeaders GatewayFilter Factory
5.10. RemoveRequestHeader GatewayFilter Factory
5.11. RemoveResponseHeader GatewayFilter Factory
5.12. RewritePath GatewayFilter Factory
5.13. SaveSession GatewayFilter Factory
5.14. SecureHeaders GatewayFilter Factory
5.15. SetPath GatewayFilter Factory
5.16. SetResponseHeader GatewayFilter Factory
5.17. SetStatus GatewayFilter Factory
5.18. StripPrefix GatewayFilter Factory
5.19. Retry GatewayFilter Factory
6. Global Filters
6.1. Combined Global Filter and GatewayFilter Ordering
6.2. Forward Routing Filter
6.3. LoadBalancerClient Filter
6.4. Netty Routing Filter
6.5. Netty Write Response Filter
6.6. RouteToRequestUrl Filter
6.7. Websocket Routing Filter
6.8. Making An Exchange As Routed
7. Configuration
7.1. Fluent Java Routes API
7.2. DiscoveryClient Route Definition Locator
8. CORS Configuration
9. Actuator API
10. Developer Guide
10.1. Writing Custom Route Predicate Factories
10.2. Writing Custom GatewayFilter Factories
10.3. Writing Custom Global Filters
10.4. Writing Custom Route Locators and Writers
11. Building a Simple Gateway Using Spring MVC or Webflux
   Next
   
\ No newline at end of file diff --git a/single/spring-cloud-gateway.html b/single/spring-cloud-gateway.html index d0dcc2b4..6eb2bb39 100644 --- a/single/spring-cloud-gateway.html +++ b/single/spring-cloud-gateway.html @@ -1,6 +1,6 @@ - Spring Cloud Gateway

Spring Cloud Gateway

Table of Contents

1. How to Include Spring Cloud Gateway
2. Glossary
3. How It Works
4. Route Predicate Factories
4.1. After Route Predicate Factory
4.2. Before Route Predicate Factory
4.3. Between Route Predicate Factory
4.4. Cookie Route Predicate Factory
4.5. Header Route Predicate Factory
4.6. Host Route Predicate Factory
4.7. Method Route Predicate Factory
4.8. Path Route Predicate Factory
4.9. Query Route Predicate Factory
4.10. RemoteAddr Route Predicate Factory
4.10.1. Modifying the way remote addresses are resolved
5. GatewayFilter Factories
5.1. AddRequestHeader GatewayFilter Factory
5.2. AddRequestParameter GatewayFilter Factory
5.3. AddResponseHeader GatewayFilter Factory
5.4. Hystrix GatewayFilter Factory
5.5. PrefixPath GatewayFilter Factory
5.6. PreserveHostHeader GatewayFilter Factory
5.7. RequestRateLimiter GatewayFilter Factory
5.7.1. Redis RateLimiter
5.8. RedirectTo GatewayFilter Factory
5.9. RemoveNonProxyHeaders GatewayFilter Factory
5.10. RemoveRequestHeader GatewayFilter Factory
5.11. RemoveResponseHeader GatewayFilter Factory
5.12. RewritePath GatewayFilter Factory
5.13. SaveSession GatewayFilter Factory
5.14. SecureHeaders GatewayFilter Factory
5.15. SetPath GatewayFilter Factory
5.16. SetResponseHeader GatewayFilter Factory
5.17. SetStatus GatewayFilter Factory
5.18. StripPrefix GatewayFilter Factory
5.19. Retry GatewayFilter Factory
6. Global Filters
6.1. Combined Global Filter and GatewayFilter Ordering
6.2. Forward Routing Filter
6.3. LoadBalancerClient Filter
6.4. Netty Routing Filter
6.5. Netty Write Response Filter
6.6. RouteToRequestUrl Filter
6.7. Websocket Routing Filter
6.8. Making An Exchange As Routed
7. Configuration
7.1. Fluent Java Routes API
7.2. DiscoveryClient Route Definition Locator
8. Actuator API
9. Developer Guide
9.1. Writing Custom Route Predicate Factories
9.2. Writing Custom GatewayFilter Factories
9.3. Writing Custom Global Filters
9.4. Writing Custom Route Locators and Writers
10. Building a Simple Gateway Using Spring MVC or Webflux

2.0.1.BUILD-SNAPSHOT

This project provides an API Gateway built on top of the Spring Ecosystem, including: Spring 5, Spring Boot 2 and Project Reactor. 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.

1. How to Include Spring Cloud Gateway

To include Spring Cloud Gateway in your project use the starter with group org.springframework.cloud + Spring Cloud Gateway

Spring Cloud Gateway

Table of Contents

1. How to Include Spring Cloud Gateway
2. Glossary
3. How It Works
4. Route Predicate Factories
4.1. After Route Predicate Factory
4.2. Before Route Predicate Factory
4.3. Between Route Predicate Factory
4.4. Cookie Route Predicate Factory
4.5. Header Route Predicate Factory
4.6. Host Route Predicate Factory
4.7. Method Route Predicate Factory
4.8. Path Route Predicate Factory
4.9. Query Route Predicate Factory
4.10. RemoteAddr Route Predicate Factory
4.10.1. Modifying the way remote addresses are resolved
5. GatewayFilter Factories
5.1. AddRequestHeader GatewayFilter Factory
5.2. AddRequestParameter GatewayFilter Factory
5.3. AddResponseHeader GatewayFilter Factory
5.4. Hystrix GatewayFilter Factory
5.5. PrefixPath GatewayFilter Factory
5.6. PreserveHostHeader GatewayFilter Factory
5.7. RequestRateLimiter GatewayFilter Factory
5.7.1. Redis RateLimiter
5.8. RedirectTo GatewayFilter Factory
5.9. RemoveNonProxyHeaders GatewayFilter Factory
5.10. RemoveRequestHeader GatewayFilter Factory
5.11. RemoveResponseHeader GatewayFilter Factory
5.12. RewritePath GatewayFilter Factory
5.13. SaveSession GatewayFilter Factory
5.14. SecureHeaders GatewayFilter Factory
5.15. SetPath GatewayFilter Factory
5.16. SetResponseHeader GatewayFilter Factory
5.17. SetStatus GatewayFilter Factory
5.18. StripPrefix GatewayFilter Factory
5.19. Retry GatewayFilter Factory
6. Global Filters
6.1. Combined Global Filter and GatewayFilter Ordering
6.2. Forward Routing Filter
6.3. LoadBalancerClient Filter
6.4. Netty Routing Filter
6.5. Netty Write Response Filter
6.6. RouteToRequestUrl Filter
6.7. Websocket Routing Filter
6.8. Making An Exchange As Routed
7. Configuration
7.1. Fluent Java Routes API
7.2. DiscoveryClient Route Definition Locator
8. CORS Configuration
9. Actuator API
10. Developer Guide
10.1. Writing Custom Route Predicate Factories
10.2. Writing Custom GatewayFilter Factories
10.3. Writing Custom Global Filters
10.4. Writing Custom Route Locators and Writers
11. Building a Simple Gateway Using Spring MVC or Webflux

2.0.1.BUILD-SNAPSHOT

This project provides an API Gateway built on top of the Spring Ecosystem, including: Spring 5, Spring Boot 2 and Project Reactor. 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.

1. How to Include Spring Cloud Gateway

To include Spring Cloud Gateway in your project use the starter with group org.springframework.cloud and artifact id spring-cloud-starter-gateway. See the Spring Cloud Project page for details on setting up your build system with the current Spring Cloud Release Train.

If you include the starter, but, for some reason, you do not want the gateway to be enabled, set spring.cloud.gateway.enabled=false.

[Important]Important

Spring Cloud Gateway requires the Netty runtime provided by Spring Boot and Spring Webflux. It does not work in a traditional Servlet Container or built as a WAR.

2. Glossary

  • Route: Route the basic building block of the gateway. It is defined by an ID, a destination URI, a collection of predicates and a collection of filters. A route is matched if aggregate predicate is true.
  • Predicate: This is a Java 8 Function Predicate. The input type is a Spring Framework ServerWebExchange. This allows developers to match on anything from the HTTP request, such as headers or parameters.
  • Filter: These are instances Spring Framework GatewayFilter constructed in with a specific factory. Here, requests and responses can be modified before or after sending the downstream request.

3. How It Works

Spring Cloud Gateway Diagram

Clients make requests to Spring Cloud Gateway. If the Gateway Handler Mapping determines that a request matches a Route, it is sent to the Gateway Web Handler. This handler runs sends the request through a filter chain that is specific to the request. The reason the filters are divided by the dotted line, is that filters may execute logic before the proxy request is sent or after. All "pre" filter logic is executed, then the proxy request is made. After the proxy request is made, the "post" filter logic is executed.

[Note]Note

URIs defined in routes without a port will get a default port set to 80 and 443 for HTTP and HTTPS URIs respectively.

4. Route Predicate Factories

Spring Cloud Gateway matches routes as part of the Spring WebFlux HandlerMapping infrastructure. Spring Cloud Gateway includes many built-in Route Predicate Factories. All of these predicates match on different attributes of the HTTP request. Multiple Route Predicate Factories can be combined and are combined via logical and.

4.1 After Route Predicate Factory

The After Route Predicate Factory takes one parameter, a datetime. This predicate matches requests that happen after the current datetime.

application.yml.  

spring:
@@ -437,7 +437,17 @@ or check if an exchange has already been routed.

-
This style also allows for more custom predicate assertions. The predicates defined by RouteDefinitionLocator beans are combined using logical and. By using the fluent Java API, you can use the and(), or() and negate() operators on the Predicate class.
7.2 DiscoveryClient Route Definition Locator
The Gateway can be configured to create routes based on services registered with a DiscoveryClient compatible service registry.
To enable this, set spring.cloud.gateway.discovery.locator.enabled=true and make sure a DiscoveryClient implementation is on the classpath and enabled (such as Netflix Eureka, Consul or Zookeeper).

8. Actuator API

TODO: document the /gateway actuator endpoint

9. Developer Guide

TODO: overview of writing custom integrations

9.1 Writing Custom Route Predicate Factories

TODO: document writing Custom Route Predicate Factories

9.2 Writing Custom GatewayFilter Factories

In order to write a GatewayFilter you will need to implement GatewayFilterFactory. There is an abstract class called AbstractGatewayFilterFactory which you can extend.

PreGatewayFilterFactory.java.  +

This style also allows for more custom predicate assertions. The predicates defined by RouteDefinitionLocator beans are combined using logical and. By using the fluent Java API, you can use the and(), or() and negate() operators on the Predicate class.

7.2 DiscoveryClient Route Definition Locator

The Gateway can be configured to create routes based on services registered with a DiscoveryClient compatible service registry.

To enable this, set spring.cloud.gateway.discovery.locator.enabled=true and make sure a DiscoveryClient implementation is on the classpath and enabled (such as Netflix Eureka, Consul or Zookeeper).

8. CORS Configuration

The gateway can be configured to control CORS behavior. The "global" CORS configuration is a map of URL patterns to Spring Framework CorsConfiguration.

application.yml.  +

spring:
+  cloud:
+    gateway:
+      globalcors:
+        corsConfigurations:
+          '[/**]':
+            allowedOrigins: "docs.spring.io"
+            allowedMethods:
+            - GET

+

In the example above, CORS requests will be allowed from requests that originate from docs.spring.io for all GET requested paths.

9. Actuator API

TODO: document the /gateway actuator endpoint

10. Developer Guide

TODO: overview of writing custom integrations

10.1 Writing Custom Route Predicate Factories

TODO: document writing Custom Route Predicate Factories

10.2 Writing Custom GatewayFilter Factories

In order to write a GatewayFilter you will need to implement GatewayFilterFactory. There is an abstract class called AbstractGatewayFilterFactory which you can extend.

PreGatewayFilterFactory.java.  

public class PreGatewayFilterFactory extends AbstractGatewayFilterFactory<PreGatewayFilterFactory.Config> {
 
 	public PreGatewayFilterFactory() {
@@ -484,7 +494,7 @@ or check if an exchange has already been routed.

-
9.3 Writing Custom Global Filters
TODO: document writing Custom Global Filters
9.4 Writing Custom Route Locators and Writers
TODO: document writing Custom Route Locators and Writers

10. Building a Simple Gateway Using Spring MVC or Webflux

Spring Cloud Gateway provides a utility object called ProxyExchange which you can use inside a regular Spring web handler as a method parameter. It supports basic downstream HTTP exchanges via methods that mirror the HTTP verbs. With MVC it also supports forwarding to a local handler via the forward() method. To use the ProxyExchange just include the right module in your classpath (either spring-cloud-gateway-mvc or spring-cloud-gateway-webflux).

MVC example (proxying a request to "/test" downstream to a remote server):

@RestController
+

10.3 Writing Custom Global Filters

TODO: document writing Custom Global Filters

10.4 Writing Custom Route Locators and Writers

TODO: document writing Custom Route Locators and Writers

11. Building a Simple Gateway Using Spring MVC or Webflux

Spring Cloud Gateway provides a utility object called ProxyExchange which you can use inside a regular Spring web handler as a method parameter. It supports basic downstream HTTP exchanges via methods that mirror the HTTP verbs. With MVC it also supports forwarding to a local handler via the forward() method. To use the ProxyExchange just include the right module in your classpath (either spring-cloud-gateway-mvc or spring-cloud-gateway-webflux).

MVC example (proxying a request to "/test" downstream to a remote server):

@RestController
 @SpringBootApplication
 public class GatewaySampleApplication {
 
diff --git a/spring-cloud-gateway.xml b/spring-cloud-gateway.xml
index 48372daa..1449d8ea 100644
--- a/spring-cloud-gateway.xml
+++ b/spring-cloud-gateway.xml
@@ -1034,6 +1034,25 @@ public RouteLocator customRouteLocator(RouteLocatorBuilder builder, ThrottleGate
 To enable this, set spring.cloud.gateway.discovery.locator.enabled=true and make sure a DiscoveryClient implementation is on the classpath and enabled (such as Netflix Eureka, Consul or Zookeeper).
 
 
+
+CORS Configuration
+The gateway can be configured to control CORS behavior. The "global" CORS configuration is a map of URL patterns to Spring Framework CorsConfiguration.
+
+application.yml
+
+spring:
+  cloud:
+    gateway:
+      globalcors:
+        corsConfigurations:
+          '[/**]':
+            allowedOrigins: "docs.spring.io"
+            allowedMethods:
+            - GET
+
+
+In the example above, CORS requests will be allowed from requests that originate from docs.spring.io for all GET requested paths.
+
 
 Actuator API
 TODO: document the /gateway actuator endpoint