1 files changed, 101 insertions, 0 deletions
diff --git a/src/org/apache/http/protocol/ResponseContent.java b/src/org/apache/http/protocol/ResponseContent.java
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+++ b/src/org/apache/http/protocol/ResponseContent.java
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+/*
+ * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/protocol/ResponseContent.java $
+ * $Revision: 573864 $
+ * $Date: 2007-09-08 08:53:25 -0700 (Sat, 08 Sep 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.protocol;
+
+import java.io.IOException;
+
+import org.apache.http.HttpEntity;
+import org.apache.http.HttpException;
+import org.apache.http.HttpResponse;
+import org.apache.http.HttpResponseInterceptor;
+import org.apache.http.HttpStatus;
+import org.apache.http.HttpVersion;
+import org.apache.http.ProtocolVersion;
+import org.apache.http.ProtocolException;
+
+/**
+ * A response interceptor that sets up entity-related headers.
+ * For use on the server side.
+ *
+ * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
+ *
+ * @version $Revision: 573864 $
+ * 
+ * @since 4.0
+ */
+public class ResponseContent implements HttpResponseInterceptor {
+
+    public ResponseContent() {
+        super();
+    }
+    
+    public void process(final HttpResponse response, final HttpContext context) 
+            throws HttpException, IOException {
+        if (response == null) {
+            throw new IllegalArgumentException("HTTP request may not be null");
+        }
+        if (response.containsHeader(HTTP.TRANSFER_ENCODING)) {
+            throw new ProtocolException("Transfer-encoding header already present");
+        }
+        if (response.containsHeader(HTTP.CONTENT_LEN)) {
+            throw new ProtocolException("Content-Length header already present");
+        }
+        ProtocolVersion ver = response.getStatusLine().getProtocolVersion();
+        HttpEntity entity = response.getEntity();
+        if (entity != null) {
+            long len = entity.getContentLength();
+            if (entity.isChunked() && !ver.lessEquals(HttpVersion.HTTP_1_0)) {
+                response.addHeader(HTTP.TRANSFER_ENCODING, HTTP.CHUNK_CODING);
+            } else if (len >= 0) {
+                response.addHeader(HTTP.CONTENT_LEN, Long.toString(entity.getContentLength()));
+            }
+            // Specify a content type if known
+            if (entity.getContentType() != null && !response.containsHeader(
+                    HTTP.CONTENT_TYPE )) {
+                response.addHeader(entity.getContentType()); 
+            }
+            // Specify a content encoding if known
+            if (entity.getContentEncoding() != null && !response.containsHeader(
+                    HTTP.CONTENT_ENCODING)) {
+                response.addHeader(entity.getContentEncoding()); 
+            }
+        } else {
+            int status = response.getStatusLine().getStatusCode();
+            if (status != HttpStatus.SC_NO_CONTENT 
+                    && status != HttpStatus.SC_NOT_MODIFIED
+                    && status != HttpStatus.SC_RESET_CONTENT) {
+                response.addHeader(HTTP.CONTENT_LEN, "0");
+            }
+        }
+    }
+    
+}