1 files changed, 115 insertions, 0 deletions
diff --git a/src/org/apache/http/impl/io/SocketInputBuffer.java b/src/org/apache/http/impl/io/SocketInputBuffer.java
new file mode 100644
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--- /dev/null
+++ b/src/org/apache/http/impl/io/SocketInputBuffer.java
@@ -0,0 +1,115 @@
+/*
+ * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/impl/io/SocketInputBuffer.java $
+ * $Revision: 560358 $
+ * $Date: 2007-07-27 12:30:42 -0700 (Fri, 27 Jul 2007) $
+ *
+ * ====================================================================
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.io;
+
+import java.io.IOException;
+import java.io.InterruptedIOException;
+import java.net.Socket;
+
+import org.apache.http.params.HttpParams;
+
+
+/**
+ * {@link Socket} bound session input buffer.
+ *
+ * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
+ *
+ * @version $Revision: 560358 $
+ * 
+ * @since 4.0
+ */
+public class SocketInputBuffer extends AbstractSessionInputBuffer {
+
+    static private final Class SOCKET_TIMEOUT_CLASS = SocketTimeoutExceptionClass();
+
+    /**
+     * Returns <code>SocketTimeoutExceptionClass<code> or <code>null</code> if the class
+     * does not exist.
+     * 
+     * @return <code>SocketTimeoutExceptionClass<code>, or <code>null</code> if unavailable.
+     */ 
+    static private Class SocketTimeoutExceptionClass() {
+        try {
+            return Class.forName("java.net.SocketTimeoutException");
+        } catch (ClassNotFoundException e) {
+            return null;
+        }
+    }
+
+    private static boolean isSocketTimeoutException(final InterruptedIOException e) {
+        if (SOCKET_TIMEOUT_CLASS != null) {
+            return SOCKET_TIMEOUT_CLASS.isInstance(e);
+        } else {
+            return true;
+        }
+    }
+    
+    private final Socket socket;
+    
+    public SocketInputBuffer(
+            final Socket socket, 
+            int buffersize, 
+            final HttpParams params) throws IOException {
+        super();
+        if (socket == null) {
+            throw new IllegalArgumentException("Socket may not be null");
+        }
+        this.socket = socket;
+        if (buffersize < 0) {
+            buffersize = socket.getReceiveBufferSize();
+        }
+        if (buffersize < 1024) {
+            buffersize = 1024;
+        }
+        init(socket.getInputStream(), buffersize, params);
+    }
+    
+    public boolean isDataAvailable(int timeout) throws IOException {
+        boolean result = hasBufferedData();
+        if (!result) {
+            int oldtimeout = this.socket.getSoTimeout();
+            try {
+                this.socket.setSoTimeout(timeout);
+                fillBuffer();
+                result = hasBufferedData();
+            } catch (InterruptedIOException e) {
+                if (!isSocketTimeoutException(e)) {
+                    throw e;
+                }
+            } finally {
+                socket.setSoTimeout(oldtimeout);
+            }
+        }
+        return result;
+    }    
+        
+}