| 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.aws.s3.functions; |
| 20 | |
| 21 | import java.util.regex.Matcher; |
| 22 | import java.util.regex.Pattern; |
| 23 | |
| 24 | import javax.inject.Inject; |
| 25 | import javax.inject.Singleton; |
| 26 | |
| 27 | import org.jclouds.http.HttpResponse; |
| 28 | import org.jclouds.http.functions.ReturnStringIf2xx; |
| 29 | |
| 30 | import com.google.common.base.Function; |
| 31 | |
| 32 | /** |
| 33 | * @see <a href="http://docs.amazonwebservices.com/AmazonS3/latest/API/mpUploadComplete.html" /> |
| 34 | * @author Adrian Cole |
| 35 | */ |
| 36 | @Singleton |
| 37 | public class ETagFromHttpResponseViaRegex implements Function<HttpResponse, String> { |
| 38 | private static Pattern pattern = Pattern.compile("<ETag>([\\S&&[^<]]+)</ETag>"); |
| 39 | private static Pattern quotPattern = Pattern.compile("(")"); |
| 40 | private final ReturnStringIf2xx returnStringIf200; |
| 41 | |
| 42 | @Inject |
| 43 | ETagFromHttpResponseViaRegex(ReturnStringIf2xx returnStringIf200) { |
| 44 | this.returnStringIf200 = returnStringIf200; |
| 45 | } |
| 46 | |
| 47 | @Override |
| 48 | public String apply(HttpResponse response) { |
| 49 | String value = null; |
| 50 | String content = returnStringIf200.apply(response); |
| 51 | if (content != null) { |
| 52 | Matcher matcher = pattern.matcher(content); |
| 53 | if (matcher.find()) { |
| 54 | value = matcher.group(1); |
| 55 | Matcher quotMatcher = quotPattern.matcher(value); |
| 56 | StringBuffer quotBuffer = new StringBuffer(); |
| 57 | boolean foundUnescapedQuote = false; |
| 58 | while (quotMatcher.find()) { |
| 59 | quotMatcher.appendReplacement(quotBuffer, "\""); |
| 60 | foundUnescapedQuote = true; |
| 61 | } |
| 62 | if (foundUnescapedQuote) { |
| 63 | quotMatcher.appendTail(quotBuffer); |
| 64 | value = quotBuffer.toString(); |
| 65 | } |
| 66 | } |
| 67 | } |
| 68 | return value; |
| 69 | } |
| 70 | |
| 71 | } |