@Override
public GetOptions apply(org.jclouds.blobstore.options.GetOptions from) {
GetOptions httpOptions = new GetOptions();
if (from != null && from != org.jclouds.blobstore.options.GetOptions.NONE) {
if (from.getIfMatch() != null) {
httpOptions.ifETagMatches(from.getIfMatch());
}
if (from.getIfModifiedSince() != null) {
httpOptions.ifModifiedSince(from.getIfModifiedSince());
}
if (from.getIfNoneMatch() != null) {
httpOptions.ifETagDoesntMatch(from.getIfNoneMatch());
}
if (from.getIfUnmodifiedSince() != null) {
httpOptions.ifUnmodifiedSince(from.getIfUnmodifiedSince());
}
for (String range : from.getRanges()) {
String[] firstLast = range.split("\\-");
if (firstLast.length == 2)
httpOptions.range(Long.parseLong(firstLast[0]), Long.parseLong(firstLast[1]));
else if (range.startsWith("-")) httpOptions.tail(Long.parseLong(firstLast[0]));
else httpOptions.startAt(Long.parseLong(firstLast[0]));
}
}
return httpOptions;
}
/** {@inheritDoc} */
@Override
public ListenableFuture<Blob> getBlob(
final String containerName, final String key, GetOptions options) {
logger.debug("Retrieving blob with key %s from container %s", key, containerName);
// If the container doesn't exist, an exception is thrown
if (!containerExistsSyncImpl(containerName)) {
logger.debug("Container %s does not exist", containerName);
return immediateFailedFuture(cnfe(containerName));
}
// If the blob doesn't exist, a null object is returned
if (!storageStrategy.blobExists(containerName, key)) {
logger.debug("Item %s does not exist in container %s", key, containerName);
return immediateFuture(null);
}
Blob blob = loadFileBlob(containerName, key);
if (options != null) {
if (options.getIfMatch() != null) {
if (!blob.getMetadata().getETag().equals(options.getIfMatch()))
return immediateFailedFuture(returnResponseException(412));
}
if (options.getIfNoneMatch() != null) {
if (blob.getMetadata().getETag().equals(options.getIfNoneMatch()))
return immediateFailedFuture(returnResponseException(304));
}
if (options.getIfModifiedSince() != null) {
Date modifiedSince = options.getIfModifiedSince();
if (blob.getMetadata().getLastModified().before(modifiedSince)) {
HttpResponse response = new HttpResponse(304, null, null);
return immediateFailedFuture(
new HttpResponseException(
String.format(
"%1$s is before %2$s", blob.getMetadata().getLastModified(), modifiedSince),
null,
response));
}
}
if (options.getIfUnmodifiedSince() != null) {
Date unmodifiedSince = options.getIfUnmodifiedSince();
if (blob.getMetadata().getLastModified().after(unmodifiedSince)) {
HttpResponse response = new HttpResponse(412, null, null);
return immediateFailedFuture(
new HttpResponseException(
String.format(
"%1$s is after %2$s", blob.getMetadata().getLastModified(), unmodifiedSince),
null,
response));
}
}
if (options.getRanges() != null && options.getRanges().size() > 0) {
byte[] data;
try {
data = toByteArray(blob.getPayload().getInput());
} catch (IOException e) {
return immediateFailedFuture(new RuntimeException(e));
}
ByteArrayOutputStream out = new ByteArrayOutputStream();
for (String s : options.getRanges()) {
if (s.startsWith("-")) {
int length = Integer.parseInt(s.substring(1));
out.write(data, data.length - length, length);
} else if (s.endsWith("-")) {
int offset = Integer.parseInt(s.substring(0, s.length() - 1));
out.write(data, offset, data.length - offset);
} else if (s.contains("-")) {
String[] firstLast = s.split("\\-");
int offset = Integer.parseInt(firstLast[0]);
int last = Integer.parseInt(firstLast[1]);
int length = last - offset + 1; // the range end is included
out.write(data, offset, length);
} else {
return immediateFailedFuture(new IllegalArgumentException("first and last were null!"));
}
}
blob.setPayload(out.toByteArray());
blob.getMetadata().getContentMetadata().setContentLength(new Long(data.length));
}
}
checkNotNull(blob.getPayload(), "payload " + blob);
return immediateFuture(blob);
}