Use ServletRequest.getLocalPort() to get real port, not host header p…

…ort.

pom.xml

@@ -32,7 +32,7 @@
     <dependency>
       <groupId>javax.servlet</groupId>
       <artifactId>servlet-api</artifactId>
-      <version>2.3</version>
+      <version>2.4</version>
     </dependency>
     <dependency>
       <groupId>log4j</groupId>

src/main/java/com/fool/servlet/PoweredByResponseHeaderFilter.java

@@ -19,7 +19,7 @@ public class PoweredByResponseHeaderFilter implements Filter
 
 	public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException, ServletException {
 		HttpServletResponse httpResponse = (HttpServletResponse) response;
-		httpResponse.addHeader(headerName, host + ":" + request.getServerPort());
+		httpResponse.addHeader(headerName, host + ":" + request.getLocalPort());
 
 		filterChain.doFilter(request, response);
 	}

src/test/java/com/fool/servlet/PoweredByResponseHeaderFilterTests.java

@@ -32,7 +32,8 @@ protected void setUp() throws Exception {
 
 	public void testSetsHeader() throws Exception {
 		Mockito.when(request.getServerName()).thenReturn("snorkle01.example.com");
-		Mockito.when(request.getServerPort()).thenReturn(8087);
+		Mockito.when(request.getServerPort()).thenReturn(80);
+		Mockito.when(request.getLocalPort()).thenReturn(8087);
 
 		filter.doFilter(request, response, chain);