Index: httpclient/src/main/java/org/apache/http/impl/client/DefaultIdempotentHttpRequestRetryHandler.java
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--- httpclient/src/main/java/org/apache/http/impl/client/DefaultIdempotentHttpRequestRetryHandler.java (revision 0)
+++ httpclient/src/main/java/org/apache/http/impl/client/DefaultIdempotentHttpRequestRetryHandler.java (revision 0)
@@ -0,0 +1,136 @@
+/*
+ * ====================================================================
+ * 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
+ * .
+ *
+ */
+
+package org.apache.http.impl.client;
+
+import java.io.IOException;
+import java.io.InterruptedIOException;
+import java.net.ConnectException;
+import java.net.UnknownHostException;
+
+import javax.net.ssl.SSLException;
+
+import org.apache.http.annotation.Immutable;
+import org.apache.http.client.HttpRequestRetryHandler;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.protocol.HttpContext;
+import org.apache.http.protocol.ExecutionContext;
+
+/**
+ * A {@link HttpRequestRetryHandler} which assumes that all requested
+ * HTTP methods which should be idempotent according to RFC-2616 are
+ * in fact idempotent and can be retried.
+ *
+ * According to RFC-2616 section 9.1.2 the idempotent HTTP methods are:
+ * GET, HEAD, PUT, DELETE, OPTIONS, and TRACE
+ *
+ * @since 4.1
+ */
+@Immutable
+public class DefaultIdempotentHttpRequestRetryHandler implements HttpRequestRetryHandler {
+
+ /** the number of times a method will be retried */
+ private final int retryCount;
+
+ /**
+ * Default constructor
+ */
+ public DefaultIdempotentHttpRequestRetryHandler(int retryCount) {
+ super();
+ this.retryCount = retryCount;
+ }
+
+ /**
+ * Default constructor
+ */
+ public DefaultIdempotentHttpRequestRetryHandler() {
+ this(3);
+ }
+ /**
+ * Used retryCount to determine
+ * if the given method should be retried.
+ */
+ public boolean retryRequest(
+ final IOException exception,
+ int executionCount,
+ final HttpContext context) {
+ if (exception == null) {
+ throw new IllegalArgumentException("Exception parameter may not be null");
+ }
+ if (context == null) {
+ throw new IllegalArgumentException("HTTP context may not be null");
+ }
+ if (executionCount > this.retryCount) {
+ // Do not retry if over max retry count
+ return false;
+ }
+ if (exception instanceof InterruptedIOException) {
+ // Timeout
+ return false;
+ }
+ if (exception instanceof UnknownHostException) {
+ // Unknown host
+ return false;
+ }
+ if (exception instanceof ConnectException) {
+ // Connection refused
+ return false;
+ }
+ if (exception instanceof SSLException) {
+ // SSL handshake exception
+ return false;
+ }
+
+ Boolean b = (Boolean)context.getAttribute(ExecutionContext.HTTP_REQ_SENT);
+ boolean sent = (b != null && b.booleanValue());
+ if (!sent) {
+ // Retry if the request has not been sent fully
+ return true;
+ }
+
+ // From the current list of supported HTTP methods:
+ // GET, HEAD, POST, PUT, DELETE, OPTIONS, and TRACE
+ // RFC-2616 section 9.1.2 declares the following should be idempotent:
+ // GET, HEAD, PUT, DELETE, OPTIONS, and TRACE
+ Object requestObj = context.getAttribute(ExecutionContext.HTTP_REQUEST);
+ boolean idempotent = !(requestObj instanceof HttpPost);
+ if (idempotent) {
+ // Retry if the request is considered idempotent
+ return true;
+ }
+
+ // otherwise do not retry
+ return false;
+ }
+
+ /**
+ * @return the maximum number of times a method will be retried
+ */
+ public int getRetryCount() {
+ return retryCount;
+ }
+}