/*
* 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.azureblob.functions;
import static com.google.common.base.Preconditions.checkArgument;
import java.util.Map.Entry;
import javax.inject.Inject;
import javax.inject.Named;
import org.jclouds.azureblob.domain.ContainerProperties;
import org.jclouds.azureblob.domain.MutableContainerPropertiesWithMetadata;
import org.jclouds.azureblob.domain.internal.MutableContainerPropertiesWithMetadataImpl;
import org.jclouds.blobstore.reference.BlobStoreConstants;
import org.jclouds.date.DateService;
import org.jclouds.http.HttpException;
import org.jclouds.http.HttpRequest;
import org.jclouds.http.HttpResponse;
import org.jclouds.rest.InvocationContext;
import org.jclouds.rest.internal.GeneratedHttpRequest;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Function;
import com.google.common.net.HttpHeaders;
/**
* This parses @{link {@link org.jclouds.azureblob.domain.ListableContainerProperties} from
* HTTP headers.
*/
public class ParseContainerPropertiesFromHeaders implements Function<HttpResponse, ContainerProperties>,
InvocationContext<ParseContainerPropertiesFromHeaders> {
private final DateService dateParser;
private final String metadataPrefix;
private GeneratedHttpRequest request;
@Inject
public ParseContainerPropertiesFromHeaders(DateService dateParser,
@Named(BlobStoreConstants.PROPERTY_USER_METADATA_PREFIX) String metadataPrefix) {
this.dateParser = dateParser;
this.metadataPrefix = metadataPrefix;
}
public ContainerProperties apply(HttpResponse from) {
MutableContainerPropertiesWithMetadata to = new MutableContainerPropertiesWithMetadataImpl();
to.setName(request.getInvocation().getArgs().get(0).toString());
addUserMetadataTo(from, to);
parseLastModifiedOrThrowException(from, to);
addETagTo(from, to);
to.setUrl(request.getEndpoint());
return to;
}
@VisibleForTesting
void addUserMetadataTo(HttpResponse from, MutableContainerPropertiesWithMetadata metadata) {
for (Entry<String, String> header : from.getHeaders().entries()) {
if (header.getKey() != null && header.getKey().startsWith(metadataPrefix))
metadata.getMetadata().put((header.getKey().substring(metadataPrefix.length())).toLowerCase(),
header.getValue());
}
}
@VisibleForTesting
void parseLastModifiedOrThrowException(HttpResponse from, MutableContainerPropertiesWithMetadata metadata)
throws HttpException {
String lastModified = from.getFirstHeaderOrNull(HttpHeaders.LAST_MODIFIED);
if (lastModified == null)
throw new HttpException(HttpHeaders.LAST_MODIFIED + " header not present in response: " + from);
metadata.setLastModified(dateParser.rfc822DateParse(lastModified));
if (metadata.getLastModified() == null)
throw new HttpException("could not parse: " + HttpHeaders.LAST_MODIFIED + ": " + lastModified);
}
@VisibleForTesting
protected void addETagTo(HttpResponse from, MutableContainerPropertiesWithMetadata metadata) {
String eTag = from.getFirstHeaderOrNull(HttpHeaders.ETAG);
if (metadata.getETag() == null && eTag != null) {
metadata.setETag(eTag);
}
}
@Override
public ParseContainerPropertiesFromHeaders setContext(HttpRequest request) {
checkArgument(request instanceof GeneratedHttpRequest, "note this handler requires a GeneratedHttpRequest");
this.request = (GeneratedHttpRequest) request;
return this;
}
}