| 1 | /** |
| 2 | * |
| 3 | * Copyright (C) 2011 Cloud Conscious, LLC. <info@cloudconscious.com> |
| 4 | * |
| 5 | * ==================================================================== |
| 6 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | * you may not use this file except in compliance with the License. |
| 8 | * You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, software |
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | * See the License for the specific language governing permissions and |
| 16 | * limitations under the License. |
| 17 | * ==================================================================== |
| 18 | */ |
| 19 | package org.jclouds.http.functions; |
| 20 | |
| 21 | import static org.jclouds.http.HttpUtils.releasePayload; |
| 22 | |
| 23 | import javax.annotation.Resource; |
| 24 | |
| 25 | import org.jclouds.http.HttpRequest; |
| 26 | import org.jclouds.http.HttpResponse; |
| 27 | import org.jclouds.logging.Logger; |
| 28 | import org.jclouds.rest.InvocationContext; |
| 29 | |
| 30 | import com.google.common.base.Function; |
| 31 | |
| 32 | /** |
| 33 | * @author Adrian Cole |
| 34 | */ |
| 35 | public class ParseContentMD5FromHeaders implements Function<HttpResponse, byte[]>, |
| 36 | InvocationContext<ParseContentMD5FromHeaders> { |
| 37 | |
| 38 | public static class NoContentMD5Exception extends RuntimeException { |
| 39 | |
| 40 | private static final long serialVersionUID = 1L; |
| 41 | private final HttpRequest request; |
| 42 | private final HttpResponse response; |
| 43 | |
| 44 | public NoContentMD5Exception(HttpRequest request, HttpResponse response) { |
| 45 | super(String.format("no MD5 returned from request: %s; response %s", request, response)); |
| 46 | this.request = request; |
| 47 | this.response = response; |
| 48 | } |
| 49 | |
| 50 | public HttpRequest getRequest() { |
| 51 | return request; |
| 52 | } |
| 53 | |
| 54 | public HttpResponse getResponse() { |
| 55 | return response; |
| 56 | } |
| 57 | |
| 58 | } |
| 59 | |
| 60 | @Resource |
| 61 | protected Logger logger = Logger.NULL; |
| 62 | private HttpRequest request; |
| 63 | |
| 64 | public byte[] apply(HttpResponse from) { |
| 65 | releasePayload(from); |
| 66 | if (from.getPayload() != null) { |
| 67 | return from.getPayload().getContentMetadata().getContentMD5(); |
| 68 | } |
| 69 | throw new NoContentMD5Exception(request, from); |
| 70 | } |
| 71 | |
| 72 | @Override |
| 73 | public ParseContentMD5FromHeaders setContext(HttpRequest request) { |
| 74 | this.request = request; |
| 75 | return this; |
| 76 | } |
| 77 | |
| 78 | } |