1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/client/DefaultHttpRequestRetryHandler.java Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,149 @@
1.4 +/*
1.5 + * ====================================================================
1.6 + * Licensed to the Apache Software Foundation (ASF) under one
1.7 + * or more contributor license agreements. See the NOTICE file
1.8 + * distributed with this work for additional information
1.9 + * regarding copyright ownership. The ASF licenses this file
1.10 + * to you under the Apache License, Version 2.0 (the
1.11 + * "License"); you may not use this file except in compliance
1.12 + * with the License. You may obtain a copy of the License at
1.13 + *
1.14 + * http://www.apache.org/licenses/LICENSE-2.0
1.15 + *
1.16 + * Unless required by applicable law or agreed to in writing,
1.17 + * software distributed under the License is distributed on an
1.18 + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
1.19 + * KIND, either express or implied. See the License for the
1.20 + * specific language governing permissions and limitations
1.21 + * under the License.
1.22 + * ====================================================================
1.23 + *
1.24 + * This software consists of voluntary contributions made by many
1.25 + * individuals on behalf of the Apache Software Foundation. For more
1.26 + * information on the Apache Software Foundation, please see
1.27 + * <http://www.apache.org/>.
1.28 + *
1.29 + */
1.30 +
1.31 +package ch.boye.httpclientandroidlib.impl.client;
1.32 +
1.33 +import java.io.IOException;
1.34 +import java.io.InterruptedIOException;
1.35 +import java.net.ConnectException;
1.36 +import java.net.UnknownHostException;
1.37 +
1.38 +import javax.net.ssl.SSLException;
1.39 +
1.40 +import ch.boye.httpclientandroidlib.annotation.Immutable;
1.41 +
1.42 +import ch.boye.httpclientandroidlib.HttpEntityEnclosingRequest;
1.43 +import ch.boye.httpclientandroidlib.HttpRequest;
1.44 +import ch.boye.httpclientandroidlib.client.HttpRequestRetryHandler;
1.45 +import ch.boye.httpclientandroidlib.protocol.HttpContext;
1.46 +import ch.boye.httpclientandroidlib.protocol.ExecutionContext;
1.47 +
1.48 +/**
1.49 + * The default {@link HttpRequestRetryHandler} used by request executors.
1.50 + *
1.51 + *
1.52 + * @since 4.0
1.53 + */
1.54 +@Immutable
1.55 +public class DefaultHttpRequestRetryHandler implements HttpRequestRetryHandler {
1.56 +
1.57 + /** the number of times a method will be retried */
1.58 + private final int retryCount;
1.59 +
1.60 + /** Whether or not methods that have successfully sent their request will be retried */
1.61 + private final boolean requestSentRetryEnabled;
1.62 +
1.63 + /**
1.64 + * Default constructor
1.65 + */
1.66 + public DefaultHttpRequestRetryHandler(int retryCount, boolean requestSentRetryEnabled) {
1.67 + super();
1.68 + this.retryCount = retryCount;
1.69 + this.requestSentRetryEnabled = requestSentRetryEnabled;
1.70 + }
1.71 +
1.72 + /**
1.73 + * Default constructor
1.74 + */
1.75 + public DefaultHttpRequestRetryHandler() {
1.76 + this(3, false);
1.77 + }
1.78 + /**
1.79 + * Used <code>retryCount</code> and <code>requestSentRetryEnabled</code> to determine
1.80 + * if the given method should be retried.
1.81 + */
1.82 + public boolean retryRequest(
1.83 + final IOException exception,
1.84 + int executionCount,
1.85 + final HttpContext context) {
1.86 + if (exception == null) {
1.87 + throw new IllegalArgumentException("Exception parameter may not be null");
1.88 + }
1.89 + if (context == null) {
1.90 + throw new IllegalArgumentException("HTTP context may not be null");
1.91 + }
1.92 + if (executionCount > this.retryCount) {
1.93 + // Do not retry if over max retry count
1.94 + return false;
1.95 + }
1.96 + if (exception instanceof InterruptedIOException) {
1.97 + // Timeout
1.98 + return false;
1.99 + }
1.100 + if (exception instanceof UnknownHostException) {
1.101 + // Unknown host
1.102 + return false;
1.103 + }
1.104 + if (exception instanceof ConnectException) {
1.105 + // Connection refused
1.106 + return false;
1.107 + }
1.108 + if (exception instanceof SSLException) {
1.109 + // SSL handshake exception
1.110 + return false;
1.111 + }
1.112 +
1.113 + HttpRequest request = (HttpRequest)
1.114 + context.getAttribute(ExecutionContext.HTTP_REQUEST);
1.115 + if (handleAsIdempotent(request)) {
1.116 + // Retry if the request is considered idempotent
1.117 + return true;
1.118 + }
1.119 +
1.120 + Boolean b = (Boolean)
1.121 + context.getAttribute(ExecutionContext.HTTP_REQ_SENT);
1.122 + boolean sent = (b != null && b.booleanValue());
1.123 +
1.124 + if (!sent || this.requestSentRetryEnabled) {
1.125 + // Retry if the request has not been sent fully or
1.126 + // if it's OK to retry methods that have been sent
1.127 + return true;
1.128 + }
1.129 + // otherwise do not retry
1.130 + return false;
1.131 + }
1.132 +
1.133 + /**
1.134 + * @return <code>true</code> if this handler will retry methods that have
1.135 + * successfully sent their request, <code>false</code> otherwise
1.136 + */
1.137 + public boolean isRequestSentRetryEnabled() {
1.138 + return requestSentRetryEnabled;
1.139 + }
1.140 +
1.141 + /**
1.142 + * @return the maximum number of times a method will be retried
1.143 + */
1.144 + public int getRetryCount() {
1.145 + return retryCount;
1.146 + }
1.147 +
1.148 + private boolean handleAsIdempotent(final HttpRequest request) {
1.149 + return !(request instanceof HttpEntityEnclosingRequest);
1.150 + }
1.151 +
1.152 +}
