blob: 9b7d755eb07324867e57755c930f7c991dc9a57f [file] [log] [blame]
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jclouds.http.functions;
import static com.google.common.net.HttpHeaders.ETAG;
import static org.jclouds.http.HttpUtils.releasePayload;
import javax.inject.Singleton;
import org.jclouds.http.HttpException;
import org.jclouds.http.HttpResponse;
import com.google.common.base.Function;
/**
* Parses an MD5 checksum from the header {@link com.google.common.net.HttpHeaders.HttpHeaders#ETAG}.
*/
@Singleton
public class ParseETagHeader implements Function<HttpResponse, String> {
public String apply(HttpResponse from) {
releasePayload(from);
String eTag = from.getFirstHeaderOrNull(ETAG);
if (eTag == null) {
// TODO: Cloud Files sends incorrectly cased ETag header... Remove this when fixed.
eTag = from.getFirstHeaderOrNull("Etag");
}
if (eTag != null) {
return eTag;
}
throw new HttpException("did not receive ETag");
}
}