HTTPCLIENT-1519: Use the original HttpHost instance passed as a parameter to HttpClient#execute when generating 'Host' request header

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1603745 13f79535-47bb-0310-9956-ffa450edef68

RELEASE_NOTES.txt

@@ -4,6 +4,10 @@ Changes for 4.4-alpha1
 Changelog:
 -------------------
 
+* [HTTPCLIENT-1519] Use the original HttpHost instance passed as a parameter to
+  HttpClient#execute when generating 'Host' request header.
+  Contributed by Oleg Kalnichevski <olegk at apache.org>
+
 * Replaced dynamic proxies with custom proxy classes to reduce thread contention.
   Contributed by Oleg Kalnichevski <olegk at apache.org>
 

httpclient/src/main/java/org/apache/http/client/methods/HttpRequestWrapper.java

@@ -32,6 +32,7 @@ import java.net.URI;
 import org.apache.http.Header;
 import org.apache.http.HttpEntity;
 import org.apache.http.HttpEntityEnclosingRequest;
+import org.apache.http.HttpHost;
 import org.apache.http.HttpRequest;
 import org.apache.http.ProtocolVersion;
 import org.apache.http.RequestLine;
@@ -40,6 +41,7 @@ import org.apache.http.message.AbstractHttpMessage;
 import org.apache.http.message.BasicRequestLine;
 import org.apache.http.params.HttpParams;
 import org.apache.http.protocol.HTTP;
+import org.apache.http.util.Args;
 
 /**
  * A wrapper class for {@link HttpRequest} that can be used to change properties of the current
@@ -52,13 +54,15 @@ import org.apache.http.protocol.HTTP;
 public class HttpRequestWrapper extends AbstractHttpMessage implements HttpUriRequest {
 
     private final HttpRequest original;
+    private final HttpHost target;
     private final String method;
     private ProtocolVersion version;
     private URI uri;
 
-    private HttpRequestWrapper(final HttpRequest request) {
+    private HttpRequestWrapper(final HttpRequest request, final HttpHost target) {
         super();
-        this.original = request;
+        this.original = Args.notNull(request, "HTTP request");
+        this.target = target;
         this.version = this.original.getRequestLine().getProtocolVersion();
         this.method = this.original.getRequestLine().getMethod();
         if (request instanceof HttpUriRequest) {
@@ -120,6 +124,13 @@ public class HttpRequestWrapper extends AbstractHttpMessage implements HttpUriRe
         return this.original;
     }
 
+    /**
+     * @Since 4.4
+     */
+    public HttpHost getTarget() {
+        return target;
+    }
+
     @Override
     public String toString() {
         return getRequestLine() + " " + this.headergroup;
@@ -130,8 +141,8 @@ public class HttpRequestWrapper extends AbstractHttpMessage implements HttpUriRe
 
         private HttpEntity entity;
 
-        public HttpEntityEnclosingRequestWrapper(final HttpEntityEnclosingRequest request) {
-            super(request);
+        HttpEntityEnclosingRequestWrapper(final HttpEntityEnclosingRequest request, final HttpHost target) {
+            super(request, target);
             this.entity = request.getEntity();
         }
 
@@ -153,14 +164,31 @@ public class HttpRequestWrapper extends AbstractHttpMessage implements HttpUriRe
 
     }
 
+    /**
+     * Creates a mutable wrapper of the original request.
+     *
+     * @param request original request
+     * @return mutable request wrappering the original one
+     */
     public static HttpRequestWrapper wrap(final HttpRequest request) {
-        if (request == null) {
-            return null;
+        return wrap(request, null);
     }
+
+
+    /**
+     * Creates a mutable wrapper of the original request.
+     *
+     * @param request original request
+     * @param target original target, if explicitly specified
+     * @return mutable request wrappering the original one
+     * @since 4.4
+     */
+    public static HttpRequestWrapper wrap(final HttpRequest request, final HttpHost target) {
+        Args.notNull(request, "HTTP request");
         if (request instanceof HttpEntityEnclosingRequest) {
-            return new HttpEntityEnclosingRequestWrapper((HttpEntityEnclosingRequest) request);
+            return new HttpEntityEnclosingRequestWrapper((HttpEntityEnclosingRequest) request, target);
         } else {
-            return new HttpRequestWrapper(request);
+            return new HttpRequestWrapper(request, target);
         }
     }
 

httpclient/src/main/java/org/apache/http/impl/client/InternalHttpClient.java

@@ -159,7 +159,7 @@ class InternalHttpClient extends CloseableHttpClient {
             execAware = (HttpExecutionAware) request;
         }
         try {
-            final HttpRequestWrapper wrapper = HttpRequestWrapper.wrap(request);
+            final HttpRequestWrapper wrapper = HttpRequestWrapper.wrap(request, target);
             final HttpClientContext localcontext = HttpClientContext.adapt(
                     context != null ? context : new BasicHttpContext());
             RequestConfig config = null;

httpclient/src/main/java/org/apache/http/impl/execchain/ProtocolExec.java

@@ -167,6 +167,9 @@ public class ProtocolExec implements ClientExecChain {
                 target = new HttpHost(uri.getHost(), uri.getPort(), uri.getScheme());
             }
         }
+        if (target == null) {
+            target = request.getTarget();
+        }
         if (target == null) {
             target = route.getTargetHost();
         }