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From ol...@apache.org
Subject svn commit: r159931 - in jakarta/httpclient/trunk/http-common/src/java/org/apache/http/impl: ConnectionReuseStrategy.java DefaultConnectionReuseStrategy.java
Date Sun, 03 Apr 2005 16:18:22 GMT
Author: olegk
Date: Sun Apr  3 09:18:20 2005
New Revision: 159931

URL: http://svn.apache.org/viewcvs?view=rev&rev=159931
Log:
Added ConnectionReuseStrategy interface and its default impl

Added:
    jakarta/httpclient/trunk/http-common/src/java/org/apache/http/impl/ConnectionReuseStrategy.java
  (with props)
    jakarta/httpclient/trunk/http-common/src/java/org/apache/http/impl/DefaultConnectionReuseStrategy.java
  (with props)

Added: jakarta/httpclient/trunk/http-common/src/java/org/apache/http/impl/ConnectionReuseStrategy.java
URL: http://svn.apache.org/viewcvs/jakarta/httpclient/trunk/http-common/src/java/org/apache/http/impl/ConnectionReuseStrategy.java?view=auto&rev=159931
==============================================================================
--- jakarta/httpclient/trunk/http-common/src/java/org/apache/http/impl/ConnectionReuseStrategy.java
(added)
+++ jakarta/httpclient/trunk/http-common/src/java/org/apache/http/impl/ConnectionReuseStrategy.java
Sun Apr  3 09:18:20 2005
@@ -0,0 +1,47 @@
+/*
+ * $HeadURL$
+ * $Revision$
+ * $Date$
+ *
+ * ====================================================================
+ *
+ *  Copyright 1999-2004 The Apache Software Foundation
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+
+package org.apache.http.impl;
+
+import org.apache.http.HttpResponse;
+
+/**
+ * <p>
+ * </p>
+ * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
+ *
+ * @version $Revision$
+ * 
+ * @since 4.0
+ */
+public interface ConnectionReuseStrategy {
+
+    boolean keepAlive(HttpResponse response);
+            
+}

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Propchange: jakarta/httpclient/trunk/http-common/src/java/org/apache/http/impl/ConnectionReuseStrategy.java
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Propchange: jakarta/httpclient/trunk/http-common/src/java/org/apache/http/impl/ConnectionReuseStrategy.java
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Added: jakarta/httpclient/trunk/http-common/src/java/org/apache/http/impl/DefaultConnectionReuseStrategy.java
URL: http://svn.apache.org/viewcvs/jakarta/httpclient/trunk/http-common/src/java/org/apache/http/impl/DefaultConnectionReuseStrategy.java?view=auto&rev=159931
==============================================================================
--- jakarta/httpclient/trunk/http-common/src/java/org/apache/http/impl/DefaultConnectionReuseStrategy.java
(added)
+++ jakarta/httpclient/trunk/http-common/src/java/org/apache/http/impl/DefaultConnectionReuseStrategy.java
Sun Apr  3 09:18:20 2005
@@ -0,0 +1,85 @@
+/*
+ * $HeadURL$
+ * $Revision$
+ * $Date$
+ *
+ * ====================================================================
+ *
+ *  Copyright 1999-2004 The Apache Software Foundation
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+
+package org.apache.http.impl;
+
+import org.apache.http.Header;
+import org.apache.http.HttpEntity;
+import org.apache.http.HttpResponse;
+import org.apache.http.HttpVersion;
+
+/**
+ * <p>
+ * </p>
+ * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
+ *
+ * @version $Revision$
+ * 
+ * @since 4.0
+ */
+public class DefaultConnectionReuseStrategy implements ConnectionReuseStrategy {
+
+    private static final String CONN_DIRECTIVE = "Connection";
+    private static final String CONN_CLOSE = "Close";
+    private static final String CONN_KEEP_ALIVE = "Keep-Alive";
+    
+    public DefaultConnectionReuseStrategy() {
+        super();
+    }
+    
+    public boolean keepAlive(final HttpResponse response) {
+        if (response == null) {
+            throw new IllegalArgumentException("HTTP response may not be null");
+        }
+        HttpEntity entity = response.getEntity();
+        HttpVersion ver = response.getStatusLine().getHttpVersion();
+        if (entity != null) {
+            if (entity.getContentLength() < 0 && !entity.isChunked()) {
+                // if the content length is not known and is not chunk
+                // encoded, the connection cannot be reused
+                return false;
+            }
+        }
+        // Check for 'Connection' directive
+        Header connheader = response.getFirstHeader(CONN_DIRECTIVE);
+        if (connheader != null) {
+            String conndirective = connheader.getValue(); 
+            if (CONN_CLOSE.equalsIgnoreCase(conndirective)) {
+                return false;
+            } else if (CONN_KEEP_ALIVE.equalsIgnoreCase(conndirective)) {
+                return true;
+            } else {
+                // log unknown directive
+            }
+        }
+        // Resorting to protocol version default close connection policy
+        return ver.greaterEquals(HttpVersion.HTTP_1_1);
+    }
+            
+}

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