Initial Contribution

1 files changed, 202 insertions, 0 deletions

diff --git a/src/org/apache/http/impl/AbstractHttpServerConnection.java b/src/org/apache/http/impl/AbstractHttpServerConnection.java
new file mode 100644
index 0000000..ef68ed3
--- /dev/null
+++ b/src/org/apache/http/impl/AbstractHttpServerConnection.java
@@ -0,0 +1,202 @@
+/*
+ * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/impl/AbstractHttpServerConnection.java $
+ * $Revision: 618017 $
+ * $Date: 2008-02-03 08:42:22 -0800 (Sun, 03 Feb 2008) $
+ *
+ * ====================================================================
+ * 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;
+
+import java.io.IOException;
+
+import org.apache.http.HttpConnectionMetrics;
+import org.apache.http.HttpEntity;
+import org.apache.http.HttpEntityEnclosingRequest;
+import org.apache.http.HttpException;
+import org.apache.http.HttpRequest;
+import org.apache.http.HttpRequestFactory;
+import org.apache.http.HttpResponse;
+import org.apache.http.HttpServerConnection;
+import org.apache.http.impl.entity.EntityDeserializer;
+import org.apache.http.impl.entity.EntitySerializer;
+import org.apache.http.impl.entity.LaxContentLengthStrategy;
+import org.apache.http.impl.entity.StrictContentLengthStrategy;
+import org.apache.http.impl.io.HttpRequestParser;
+import org.apache.http.impl.io.HttpResponseWriter;
+import org.apache.http.io.HttpMessageParser;
+import org.apache.http.io.HttpMessageWriter;
+import org.apache.http.io.SessionInputBuffer;
+import org.apache.http.io.SessionOutputBuffer;
+import org.apache.http.params.HttpParams;
+
+/**
+ * Abstract server-side HTTP connection capable of transmitting and receiving data
+ * using arbitrary {@link SessionInputBuffer} and {@link SessionOutputBuffer}
+ *
+ * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
+ *
+ * @version $Revision: 618017 $
+ * 
+ * @since 4.0
+ */
+public abstract class AbstractHttpServerConnection implements HttpServerConnection {
+
+    private final EntitySerializer entityserializer;
+    private final EntityDeserializer entitydeserializer;
+    
+    private SessionInputBuffer inbuffer = null;
+    private SessionOutputBuffer outbuffer = null;
+    private HttpMessageParser requestParser = null;
+    private HttpMessageWriter responseWriter = null;
+    private HttpConnectionMetricsImpl metrics = null;
+
+
+
+    public AbstractHttpServerConnection() {
+        super();
+        this.entityserializer = createEntitySerializer();
+        this.entitydeserializer = createEntityDeserializer();
+    }
+    
+    protected abstract void assertOpen() throws IllegalStateException;
+
+    protected EntityDeserializer createEntityDeserializer() {
+        return new EntityDeserializer(new LaxContentLengthStrategy());
+    }
+
+    protected EntitySerializer createEntitySerializer() {
+        return new EntitySerializer(new StrictContentLengthStrategy());
+    }
+
+    protected HttpRequestFactory createHttpRequestFactory() {
+        return new DefaultHttpRequestFactory();
+    }
+
+    protected HttpMessageParser createRequestParser(
+            final SessionInputBuffer buffer,
+            final HttpRequestFactory requestFactory,
+            final HttpParams params) {
+        // override in derived class to specify a line parser
+        return new HttpRequestParser(buffer, null, requestFactory, params);
+    }
+    
+    protected HttpMessageWriter createResponseWriter(
+            final SessionOutputBuffer buffer,
+            final HttpParams params) {
+        // override in derived class to specify a line formatter
+        return new HttpResponseWriter(buffer, null, params);
+    }
+
+
+    protected void init(
+            final SessionInputBuffer inbuffer,
+            final SessionOutputBuffer outbuffer,
+            final HttpParams params) {
+        if (inbuffer == null) {
+            throw new IllegalArgumentException("Input session buffer may not be null");
+        }
+        if (outbuffer == null) {
+            throw new IllegalArgumentException("Output session buffer may not be null");
+        }
+        this.inbuffer = inbuffer;
+        this.outbuffer = outbuffer;
+        this.requestParser = createRequestParser(
+                inbuffer, 
+                createHttpRequestFactory(), 
+                params);
+        this.responseWriter = createResponseWriter(
+                outbuffer, params);
+        this.metrics = new HttpConnectionMetricsImpl(
+                inbuffer.getMetrics(),
+                outbuffer.getMetrics());
+    }
+    
+    public HttpRequest receiveRequestHeader() 
+            throws HttpException, IOException {
+        assertOpen();
+        HttpRequest request = (HttpRequest) this.requestParser.parse();
+        this.metrics.incrementRequestCount();
+        return request;
+    }
+    
+    public void receiveRequestEntity(final HttpEntityEnclosingRequest request) 
+            throws HttpException, IOException {
+        if (request == null) {
+            throw new IllegalArgumentException("HTTP request may not be null");
+        }
+        assertOpen();
+        HttpEntity entity = this.entitydeserializer.deserialize(this.inbuffer, request);
+        request.setEntity(entity);
+    }
+
+    protected void doFlush() throws IOException  {
+        this.outbuffer.flush();
+    }
+    
+    public void flush() throws IOException {
+        assertOpen();
+        doFlush();
+    }
+    
+    public void sendResponseHeader(final HttpResponse response) 
+            throws HttpException, IOException {
+        if (response == null) {
+            throw new IllegalArgumentException("HTTP response may not be null");
+        }
+        assertOpen();
+        this.responseWriter.write(response);
+        if (response.getStatusLine().getStatusCode() >= 200) {
+            this.metrics.incrementResponseCount();
+        }
+    }
+
+    public void sendResponseEntity(final HttpResponse response) 
+            throws HttpException, IOException {
+        if (response.getEntity() == null) {
+            return;
+        }
+        this.entityserializer.serialize(
+                this.outbuffer,
+                response,
+                response.getEntity());
+    }
+    
+    public boolean isStale() {
+        assertOpen();
+        try {
+            this.inbuffer.isDataAvailable(1);
+            return false;
+        } catch (IOException ex) {
+            return true;
+        }
+    }
+    
+    public HttpConnectionMetrics getMetrics() {
+        return this.metrics;
+    }
+
+}