Consistently check available local/remote addresses for non-null

spring-test/src/main/java/org/springframework/mock/http/server/reactive/MockServerHttpRequest.java

@@ -24,6 +24,7 @@ import java.util.Arrays;
 import java.util.Collection;
 import java.util.List;
 import java.util.Locale;
+import java.util.Objects;
 import java.util.Optional;
 
 import org.reactivestreams.Publisher;
@@ -64,10 +65,10 @@ public final class MockServerHttpRequest extends AbstractServerHttpRequest {
 	private final MultiValueMap<String, HttpCookie> cookies;
 
 	@Nullable
-	private final InetSocketAddress remoteAddress;
+	private final InetSocketAddress localAddress;
 
 	@Nullable
-	private final InetSocketAddress localAddress;
+	private final InetSocketAddress remoteAddress;
 
 	@Nullable
 	private final SslInfo sslInfo;
@@ -98,9 +99,14 @@ public final class MockServerHttpRequest extends AbstractServerHttpRequest {
 	}
 
 	@Override
-	@SuppressWarnings("ConstantConditions")
 	public String getMethodValue() {
-		return (this.httpMethod != null ? this.httpMethod.name() : this.customHttpMethod);
+		return (this.httpMethod != null ? this.httpMethod.name() : Objects.requireNonNull(this.customHttpMethod));
+	}
+
+	@Override
+	@Nullable
+	public InetSocketAddress getLocalAddress() {
+		return this.localAddress;
 	}
 
 	@Override
@@ -109,14 +115,8 @@ public final class MockServerHttpRequest extends AbstractServerHttpRequest {
 		return this.remoteAddress;
 	}
 
-	@Nullable
 	@Override
-	public InetSocketAddress getLocalAddress() {
-		return this.localAddress;
-	}
-
 	@Nullable
-	@Override
 	protected SslInfo initSslInfo() {
 		return this.sslInfo;
 	}

spring-web/src/main/java/org/springframework/http/server/reactive/DefaultServerHttpRequestBuilder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -211,20 +211,20 @@ class DefaultServerHttpRequestBuilder implements ServerHttpRequest.Builder {
 			return this.cookies;
 		}
 
-		@Nullable
 		@Override
-		public InetSocketAddress getRemoteAddress() {
-			return this.originalRequest.getRemoteAddress();
-		}
-
 		@Nullable
-		@Override
 		public InetSocketAddress getLocalAddress() {
 			return this.originalRequest.getLocalAddress();
 		}
 
-		@Nullable
 		@Override
+		@Nullable
+		public InetSocketAddress getRemoteAddress() {
+			return this.originalRequest.getRemoteAddress();
+		}
+
+		@Override
+		@Nullable
 		protected SslInfo initSslInfo() {
 			return this.sslInfo;
 		}

spring-web/src/main/java/org/springframework/http/server/reactive/ReactorServerHttpRequest.java

@@ -96,6 +96,7 @@ class ReactorServerHttpRequest extends AbstractServerHttpRequest {
 		}
 		else {
 			InetSocketAddress localAddress = request.hostAddress();
+			Assert.state(localAddress != null, "No host address available");
 			return new URI(scheme, null, localAddress.getHostString(),
 					localAddress.getPort(), null, null, null);
 		}
@@ -151,13 +152,15 @@ class ReactorServerHttpRequest extends AbstractServerHttpRequest {
 	}
 
 	@Override
-	public InetSocketAddress getRemoteAddress() {
-		return this.request.remoteAddress();
+	@Nullable
+	public InetSocketAddress getLocalAddress() {
+		return this.request.hostAddress();
 	}
 
 	@Override
-	public InetSocketAddress getLocalAddress() {
-		return this.request.hostAddress();
+	@Nullable
+	public InetSocketAddress getRemoteAddress() {
+		return this.request.remoteAddress();
 	}
 
 	@Override

spring-web/src/main/java/org/springframework/http/server/reactive/ServerHttpRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -65,19 +65,19 @@ public interface ServerHttpRequest extends HttpRequest, ReactiveHttpInputMessage
 	MultiValueMap<String, HttpCookie> getCookies();
 
 	/**
-	 * Return the remote address where this request is connected to, if available.
+	 * Return the local address the request was accepted on, if available.
+	 * @since 5.2.3
 	 */
 	@Nullable
-	default InetSocketAddress getRemoteAddress() {
+	default InetSocketAddress getLocalAddress() {
 		return null;
 	}
 
 	/**
-	 * Return the local address the request was accepted on, if available.
-	 * 5.2.3
+	 * Return the remote address where this request is connected to, if available.
 	 */
 	@Nullable
-	default InetSocketAddress getLocalAddress() {
+	default InetSocketAddress getRemoteAddress() {
 		return null;
 	}
 

spring-web/src/main/java/org/springframework/http/server/reactive/ServerHttpRequestDecorator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -97,17 +97,19 @@ public class ServerHttpRequestDecorator implements ServerHttpRequest {
 	}
 
 	@Override
+	@Nullable
+	public InetSocketAddress getLocalAddress() {
+		return getDelegate().getLocalAddress();
+	}
+
+	@Override
+	@Nullable
 	public InetSocketAddress getRemoteAddress() {
 		return getDelegate().getRemoteAddress();
 	}
 
 	@Override
-	public InetSocketAddress getLocalAddress() {
-		return getDelegate().getLocalAddress();
-	}
-
 	@Nullable
-	@Override
 	public SslInfo getSslInfo() {
 		return getDelegate().getSslInfo();
 	}

spring-web/src/main/java/org/springframework/http/server/reactive/ServletServerHttpRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -42,6 +42,7 @@ import org.springframework.core.io.buffer.DefaultDataBufferFactory;
 import org.springframework.http.HttpCookie;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.MediaType;
+import org.springframework.lang.NonNull;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.LinkedCaseInsensitiveMap;
@@ -174,13 +175,15 @@ class ServletServerHttpRequest extends AbstractServerHttpRequest {
 	}
 
 	@Override
-	public InetSocketAddress getRemoteAddress() {
-		return new InetSocketAddress(this.request.getRemoteHost(), this.request.getRemotePort());
+	@NonNull
+	public InetSocketAddress getLocalAddress() {
+		return new InetSocketAddress(this.request.getLocalAddr(), this.request.getLocalPort());
 	}
 
 	@Override
-	public InetSocketAddress getLocalAddress() {
-		return new InetSocketAddress(this.request.getLocalAddr(), this.request.getLocalPort());
+	@NonNull
+	public InetSocketAddress getRemoteAddress() {
+		return new InetSocketAddress(this.request.getRemoteHost(), this.request.getRemotePort());
 	}
 
 	@Override

spring-web/src/main/java/org/springframework/http/server/reactive/UndertowServerHttpRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -98,13 +98,15 @@ class UndertowServerHttpRequest extends AbstractServerHttpRequest {
 	}
 
 	@Override
-	public InetSocketAddress getRemoteAddress() {
-		return this.exchange.getSourceAddress();
+	@Nullable
+	public InetSocketAddress getLocalAddress() {
+		return this.exchange.getDestinationAddress();
 	}
 
 	@Override
-	public InetSocketAddress getLocalAddress() {
-		return this.exchange.getDestinationAddress();
+	@Nullable
+	public InetSocketAddress getRemoteAddress() {
+		return this.exchange.getSourceAddress();
 	}
 
 	@Nullable

spring-web/src/testFixtures/java/org/springframework/web/testfixture/http/server/reactive/MockServerHttpRequest.java

@@ -24,6 +24,7 @@ import java.util.Arrays;
 import java.util.Collection;
 import java.util.List;
 import java.util.Locale;
+import java.util.Objects;
 import java.util.Optional;
 
 import org.reactivestreams.Publisher;
@@ -64,10 +65,10 @@ public final class MockServerHttpRequest extends AbstractServerHttpRequest {
 	private final MultiValueMap<String, HttpCookie> cookies;
 
 	@Nullable
-	private final InetSocketAddress remoteAddress;
+	private final InetSocketAddress localAddress;
 
 	@Nullable
-	private final InetSocketAddress localAddress;
+	private final InetSocketAddress remoteAddress;
 
 	@Nullable
 	private final SslInfo sslInfo;
@@ -98,9 +99,14 @@ public final class MockServerHttpRequest extends AbstractServerHttpRequest {
 	}
 
 	@Override
-	@SuppressWarnings("ConstantConditions")
 	public String getMethodValue() {
-		return (this.httpMethod != null ? this.httpMethod.name() : this.customHttpMethod);
+		return (this.httpMethod != null ? this.httpMethod.name() : Objects.requireNonNull(this.customHttpMethod));
+	}
+
+	@Override
+	@Nullable
+	public InetSocketAddress getLocalAddress() {
+		return this.localAddress;
 	}
 
 	@Override
@@ -109,14 +115,8 @@ public final class MockServerHttpRequest extends AbstractServerHttpRequest {
 		return this.remoteAddress;
 	}
 
-	@Nullable
 	@Override
-	public InetSocketAddress getLocalAddress() {
-		return this.localAddress;
-	}
-
 	@Nullable
-	@Override
 	protected SslInfo initSslInfo() {
 		return this.sslInfo;
 	}