Proxy websocket ping frames.

fixes gh-729

pom.xml

@@ -15,7 +15,7 @@
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-build</artifactId>
-		<version>2.2.2.BUILD-SNAPSHOT</version>
+		<version>2.2.3.BUILD-SNAPSHOT</version>
 		<relativePath/>
 	</parent>
 	<scm>

spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/config/GatewayAutoConfiguration.java

@@ -734,6 +734,7 @@ public class GatewayAutoConfiguration {
 				webSocketClient.setMaxFramePayloadLength(
 						properties.getWebsocket().getMaxFramePayloadLength());
 			}
+			webSocketClient.setHandlePing(properties.getWebsocket().isProxyPing());
 			return webSocketClient;
 		}
 

spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/config/HttpClientProperties.java

@@ -603,6 +603,9 @@ public class HttpClientProperties {
 		/** Max frame payload length. */
 		private Integer maxFramePayloadLength;
 
+		/** Proxy ping frames to downstream services, defaults to true. */
+		private boolean proxyPing = true;
+
 		public Integer getMaxFramePayloadLength() {
 			return this.maxFramePayloadLength;
 		}
@@ -611,10 +614,19 @@ public class HttpClientProperties {
 			this.maxFramePayloadLength = maxFramePayloadLength;
 		}
 
+		public boolean isProxyPing() {
+			return proxyPing;
+		}
+
+		public void setProxyPing(boolean proxyPing) {
+			this.proxyPing = proxyPing;
+		}
+
 		@Override
 		public String toString() {
 			return new ToStringCreator(this)
-					.append("maxFramePayloadLength", maxFramePayloadLength).toString();
+					.append("maxFramePayloadLength", maxFramePayloadLength)
+					.append("proxyPing", proxyPing).toString();
 		}
 
 	}

spring-cloud-gateway-dependencies/pom.xml

@@ -6,7 +6,7 @@
 	<parent>
 		<artifactId>spring-cloud-dependencies-parent</artifactId>
 		<groupId>org.springframework.cloud</groupId>
-		<version>2.2.1.RELEASE</version>
+		<version>2.2.3.BUILD-SNAPSHOT</version>
 		<relativePath/>
 	</parent>