1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. 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,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.eclipse.aether.transport.http;
20
21 import java.util.Map;
22
23 import org.apache.http.HttpResponse;
24 import org.apache.http.client.HttpResponseException;
25 import org.apache.http.client.methods.HttpUriRequest;
26
27 /**
28 * A component extracting included checksums from response of artifact request.
29 *
30 * @since 1.8.0
31 */
32 public abstract class ChecksumExtractor {
33 /**
34 * Prepares request, if needed.
35 */
36 public void prepareRequest(HttpUriRequest request) {
37 // nothing
38 }
39
40 /**
41 * May control is request to be retried with checksum extractors disabled.
42 */
43 public boolean retryWithoutExtractor(HttpResponseException exception) {
44 return false; // nothing, usually tied to prepareRequest
45 }
46
47 /**
48 * Tries to extract checksums from response headers, if present, otherwise returns {@code null}.
49 */
50 public abstract Map<String, String> extractChecksums(HttpResponse response);
51 }