2 * ============LICENSE_START==========================================
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3 * ===================================================================
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4 * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
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5 * ===================================================================
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6 * Licensed under the Apache License, Version 2.0 (the "License");
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7 * you may not use this file except in compliance with the License.
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8 * You may obtain a copy of the License at
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10 * http://www.apache.org/licenses/LICENSE-2.0
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12 * Unless required by applicable law or agreed to in writing, software
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13 * distributed under the License is distributed on an "AS IS" BASIS,
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14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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15 * See the License for the specific language governing permissions and
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16 * limitations under the License.
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17 * ============LICENSE_END============================================
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19 * ECOMP and OpenECOMP are trademarks
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20 * and service marks of AT&T Intellectual Property.
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24 package com.woorea.openstack.connector;
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26 import java.net.URI;
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28 import org.apache.http.HttpRequest;
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29 import org.apache.http.HttpResponse;
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30 import org.apache.http.HttpStatus;
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31 import org.apache.http.ProtocolException;
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32 import org.apache.http.annotation.Immutable;
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33 import org.apache.http.client.methods.HttpGet;
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34 import org.apache.http.client.methods.HttpHead;
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35 import org.apache.http.client.methods.HttpDelete;
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36 import org.apache.http.client.methods.HttpUriRequest;
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37 import org.apache.http.client.methods.RequestBuilder;
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38 import org.apache.http.impl.client.DefaultRedirectStrategy;
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39 import org.apache.http.protocol.HttpContext;
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42 * Custom {@link org.apache.http.client.RedirectStrategy} implementation
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43 * that automatically redirects all HEAD, GET and DELETE requests.
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44 * The {@link org.apache.http.client.DefaultRedirectStrategy} only
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45 * redirects GET and HEAD automatically, per the HTTP specification
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46 * (POST and PUT typically have bodies and thus cannot be redirected).
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48 * A custom strategy is needed for the Openstack API, which can also send
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49 * 302 on a DELETE (by name) request, expecting the client to follow the
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50 * redirect to perform the actual deletion.
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53 public class HttpClientRedirectStrategy extends DefaultRedirectStrategy {
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56 * Redirectable methods.
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58 private static final String[] REDIRECT_METHODS = new String[] {
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59 HttpGet.METHOD_NAME,
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60 HttpDelete.METHOD_NAME,
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61 HttpHead.METHOD_NAME
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65 * Determine if the request should be redirected.
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66 * This may not actually be needed, since the REDIRECT_METHODS
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67 * array has been updated with the DELETE.
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70 protected boolean isRedirectable(final String method) {
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71 for (final String m: REDIRECT_METHODS) {
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72 if (m.equalsIgnoreCase(method)) {
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80 * Override the default redirect handling method. As implemented
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81 * in HttpClient, it does not preserve the method on 301 or 302
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82 * responses, always redirecting to a GET.
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85 public HttpUriRequest getRedirect(
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86 final HttpRequest request,
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87 final HttpResponse response,
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88 final HttpContext context) throws ProtocolException {
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90 final URI uri = getLocationURI(request, response, context);
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91 final String method = request.getRequestLine().getMethod();
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92 if (method.equalsIgnoreCase(HttpHead.METHOD_NAME)) {
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93 return new HttpHead(uri);
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94 } else if (method.equalsIgnoreCase(HttpGet.METHOD_NAME)) {
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95 return new HttpGet(uri);
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98 final int status = response.getStatusLine().getStatusCode();
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100 HttpUriRequest newRequest = null;
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101 if (status == HttpStatus.SC_TEMPORARY_REDIRECT || status == HttpStatus.SC_MOVED_TEMPORARILY) {
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102 newRequest = RequestBuilder.copy(request).setUri(uri).build();
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104 newRequest = new HttpGet(uri);
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