1 files changed, 78 insertions, 0 deletions
diff --git a/src/org/apache/http/protocol/RequestExpectContinue.java b/src/org/apache/http/protocol/RequestExpectContinue.java
new file mode 100644
index 0000000..0799849
--- /dev/null
+++ b/src/org/apache/http/protocol/RequestExpectContinue.java
@@ -0,0 +1,78 @@
+/*
+ * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/protocol/RequestExpectContinue.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.HttpEntityEnclosingRequest;
+import org.apache.http.HttpException;
+import org.apache.http.HttpRequest;
+import org.apache.http.HttpRequestInterceptor;
+import org.apache.http.HttpVersion;
+import org.apache.http.ProtocolVersion;
+import org.apache.http.params.HttpProtocolParams;
+
+/**
+ * A request interceptor that enables the expect-continue handshake.
+ *
+ * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
+ *
+ * @version $Revision: 573864 $
+ * 
+ * @since 4.0
+ */
+public class RequestExpectContinue implements HttpRequestInterceptor {
+
+    public RequestExpectContinue() {
+        super();
+    }
+    
+    public void process(final HttpRequest request, final HttpContext context) 
+            throws HttpException, IOException {
+        if (request == null) {
+            throw new IllegalArgumentException("HTTP request may not be null");
+        }
+        if (request instanceof HttpEntityEnclosingRequest) {
+            HttpEntity entity = ((HttpEntityEnclosingRequest)request).getEntity();
+            // Do not send the expect header if request body is known to be empty
+            if (entity != null && entity.getContentLength() != 0) { 
+                ProtocolVersion ver = request.getRequestLine().getProtocolVersion();
+                if (HttpProtocolParams.useExpectContinue(request.getParams()) 
+                        && !ver.lessEquals(HttpVersion.HTTP_1_0)) {
+                    request.addHeader(HTTP.EXPECT_DIRECTIVE, HTTP.EXPECT_CONTINUE);
+                }
+            }
+        }
+    }
+    
+}