/
BlobWriteChannel.java
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/
BlobWriteChannel.java
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/*
* Copyright 2015 Google LLC
*
* Licensed 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 com.google.cloud.storage;
import static com.google.cloud.RetryHelper.runWithRetries;
import static java.util.concurrent.Executors.callable;
import com.google.api.services.storage.model.StorageObject;
import com.google.cloud.BaseWriteChannel;
import com.google.cloud.RestorableState;
import com.google.cloud.RetryHelper;
import com.google.cloud.WriteChannel;
import com.google.cloud.storage.spi.v1.StorageRpc;
import java.net.URL;
import java.util.Map;
import java.util.concurrent.Callable;
/** Write channel implementation to upload Google Cloud Storage blobs. */
class BlobWriteChannel extends BaseWriteChannel<StorageOptions, BlobInfo> {
BlobWriteChannel(StorageOptions options, BlobInfo blob, Map<StorageRpc.Option, ?> optionsMap) {
this(options, blob, open(options, blob, optionsMap));
}
BlobWriteChannel(StorageOptions options, URL signedURL) {
this(options, open(signedURL, options));
}
BlobWriteChannel(StorageOptions options, BlobInfo blobInfo, String uploadId) {
super(options, blobInfo, uploadId);
}
BlobWriteChannel(StorageOptions options, String uploadId) {
super(options, null, uploadId);
}
// Contains metadata of the updated object or null if upload is not completed.
private StorageObject storageObject;
StorageObject getStorageObject() {
return storageObject;
}
@Override
protected void flushBuffer(final int length, final boolean last) {
try {
runWithRetries(
callable(
new Runnable() {
@Override
public void run() {
storageObject =
getOptions()
.getStorageRpcV1()
.writeWithResponse(
getUploadId(), getBuffer(), 0, getPosition(), length, last);
}
}),
getOptions().getRetrySettings(),
StorageImpl.EXCEPTION_HANDLER,
getOptions().getClock());
} catch (RetryHelper.RetryHelperException e) {
throw StorageException.translateAndThrow(e);
}
}
protected StateImpl.Builder stateBuilder() {
return StateImpl.builder(getOptions(), getEntity(), getUploadId());
}
private static String open(
final StorageOptions options,
final BlobInfo blob,
final Map<StorageRpc.Option, ?> optionsMap) {
try {
return runWithRetries(
new Callable<String>() {
@Override
public String call() {
return options.getStorageRpcV1().open(blob.toPb(), optionsMap);
}
},
options.getRetrySettings(),
StorageImpl.EXCEPTION_HANDLER,
options.getClock());
} catch (RetryHelper.RetryHelperException e) {
throw StorageException.translateAndThrow(e);
}
}
private static String open(final URL signedURL, final StorageOptions options) {
try {
return runWithRetries(
new Callable<String>() {
@Override
public String call() {
if (!isValidSignedURL(signedURL.getQuery())) {
throw new StorageException(2, "invalid signedURL");
}
return options.getStorageRpcV1().open(signedURL.toString());
}
},
options.getRetrySettings(),
StorageImpl.EXCEPTION_HANDLER,
options.getClock());
} catch (RetryHelper.RetryHelperException e) {
throw StorageException.translateAndThrow(e);
}
}
private static boolean isValidSignedURL(String signedURLQuery) {
boolean isValid = true;
if (signedURLQuery.startsWith("X-Goog-Algorithm=")) {
if (!signedURLQuery.contains("&X-Goog-Credential=")
|| !signedURLQuery.contains("&X-Goog-Date=")
|| !signedURLQuery.contains("&X-Goog-Expires=")
|| !signedURLQuery.contains("&X-Goog-SignedHeaders=")
|| !signedURLQuery.contains("&X-Goog-Signature=")) {
isValid = false;
}
} else if (signedURLQuery.startsWith("GoogleAccessId=")) {
if (!signedURLQuery.contains("&Expires=") || !signedURLQuery.contains("&Signature=")) {
isValid = false;
}
} else {
isValid = false;
}
return isValid;
}
static class StateImpl extends BaseWriteChannel.BaseState<StorageOptions, BlobInfo> {
private static final long serialVersionUID = -9028324143780151286L;
StateImpl(Builder builder) {
super(builder);
}
static class Builder extends BaseWriteChannel.BaseState.Builder<StorageOptions, BlobInfo> {
private Builder(StorageOptions options, BlobInfo blobInfo, String uploadId) {
super(options, blobInfo, uploadId);
}
@Override
public RestorableState<WriteChannel> build() {
return new StateImpl(this);
}
}
static Builder builder(StorageOptions options, BlobInfo blobInfo, String uploadId) {
return new Builder(options, blobInfo, uploadId);
}
@Override
public WriteChannel restore() {
BlobWriteChannel channel = new BlobWriteChannel(serviceOptions, entity, uploadId);
channel.restore(this);
return channel;
}
}
}