UriComponentsBuilder.fromHttpRequest sets port correctly

Cherry-picked from commit d64c48 on master

Issue: SPR-12771

Author: rstoyanchev

spring-web/src/main/java/org/springframework/web/util/UriComponentsBuilder.java

@@ -307,6 +307,7 @@ public static UriComponentsBuilder fromHttpRequest(HttpRequest request) {
 
 		builder.scheme(scheme);
 		builder.host(host);
+		builder.port(null);
 		if (scheme.equals("http") && port != 80 || scheme.equals("https") && port != 443) {
 			builder.port(port);
 		}

spring-web/src/test/java/org/springframework/web/util/UriComponentsBuilderTests.java

@@ -256,6 +256,26 @@ public void fromHttpRequest() throws URISyntaxException {
 		assertEquals("a=1", result.getQuery());
 	}
 
+	// SPR-12771
+
+	@Test
+	public void fromHttpRequestResetsPortBeforeSettingIt() throws Exception {
+		MockHttpServletRequest request = new MockHttpServletRequest();
+		request.addHeader("X-Forwarded-Proto", "https");
+		request.addHeader("X-Forwarded-Host", "84.198.58.199");
+		request.addHeader("X-Forwarded-Port", 443);
+		request.setScheme("http");
+		request.setServerName("example.com");
+		request.setServerPort(80);
+		request.setRequestURI("/rest/mobile/users/1");
+
+		UriComponents result = UriComponentsBuilder.fromHttpRequest(new ServletServerHttpRequest(request)).build();
+		assertEquals("https", result.getScheme());
+		assertEquals("84.198.58.199", result.getHost());
+		assertEquals(-1, result.getPort());
+		assertEquals("/rest/mobile/users/1", result.getPath());
+	}
+
 	@Test
 	public void path() throws URISyntaxException {
 		UriComponentsBuilder builder = UriComponentsBuilder.fromPath("/foo/bar");

spring-webmvc/src/test/java/org/springframework/web/servlet/support/ServletUriComponentsBuilderTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -36,15 +36,18 @@ public class ServletUriComponentsBuilderTests {
 
 	private MockHttpServletRequest request;
 
+
 	@Before
 	public void setup() {
 		this.request = new MockHttpServletRequest();
 		this.request.setScheme("http");
 		this.request.setServerName("localhost");
 		this.request.setServerPort(-1);
+		this.request.setRequestURI("/mvc-showcase");
 		this.request.setContextPath("/mvc-showcase");
 	}
 
+
 	@Test
 	public void fromRequest() {
 		this.request.setRequestURI("/mvc-showcase/data/param");
@@ -64,15 +67,15 @@ public void fromRequestEncodedPath() {
 	public void fromRequestAtypicalHttpPort() {
 		this.request.setServerPort(8080);
 		String result = ServletUriComponentsBuilder.fromRequest(this.request).build().toUriString();
-		assertEquals("http://localhost:8080", result);
+		assertEquals("http://localhost:8080/mvc-showcase", result);
 	}
 
 	@Test
 	public void fromRequestAtypicalHttpsPort() {
 		this.request.setScheme("https");
 		this.request.setServerPort(9043);
 		String result = ServletUriComponentsBuilder.fromRequest(this.request).build().toUriString();
-		assertEquals("https://localhost:9043", result);
+		assertEquals("https://localhost:9043/mvc-showcase", result);
 	}
 
 	@Test
@@ -150,6 +153,19 @@ public void fromRequestWithForwardedHostWithForwardedScheme() {
 		assertEquals("should have used the default port of the forwarded request", -1, result.getPort());
 	}
 
+	// SPR-12771
+
+	@Test
+	public void fromRequestWithForwardedProtoAndDefaultPort() {
+		this.request.addHeader("X-Forwarded-Proto", "https");
+		this.request.addHeader("X-Forwarded-Host", "84.198.58.199");
+		this.request.addHeader("X-Forwarded-Port", "443");
+		this.request.setServerPort(80);
+		UriComponents result = ServletUriComponentsBuilder.fromRequest(this.request).build();
+
+		assertEquals("https://84.198.58.199/mvc-showcase", result.toString());
+	}
+
 	@Test
 	public void fromRequestWithForwardedPrefix() {
 		this.request.setRequestURI("/bar");