fix: update implementation of readAllBytes and downloadTo to be more …

…robust to retryable errors

Additional small changes to bring http and grpc implementation into conformance with each other.

Much of this also serves as pre-work to the grpc retry conformance tests enablement after the next release of testbench.

google-cloud-storage/src/main/java/com/google/cloud/storage/BaseStorageWriteChannel.java

@@ -101,12 +101,10 @@ public final synchronized int write(ByteBuffer src) throws IOException {
       }
       int write = tmp.write(src);
       return write;
-    } catch (StorageException e) {
-      throw new IOException(e);
     } catch (IOException e) {
       throw e;
     } catch (Exception e) {
-      throw new IOException(StorageException.coalesce(e));
+      throw StorageException.coalesce(e);
     }
   }
 

google-cloud-storage/src/main/java/com/google/cloud/storage/GrpcStorageImpl.java

@@ -250,11 +250,34 @@ public Blob create(
 
   @Override
   public Blob create(BlobInfo blobInfo, InputStream content, BlobWriteOption... options) {
-    try {
-      return createFrom(blobInfo, content, options);
-    } catch (IOException e) {
+    requireNonNull(blobInfo, "blobInfo must be non null");
+
+    Opts<ObjectTargetOpt> opts = Opts.unwrap(options).resolveFrom(blobInfo).prepend(defaultOpts);
+    GrpcCallContext grpcCallContext =
+        opts.grpcMetadataMapper().apply(GrpcCallContext.createDefault());
+    WriteObjectRequest req = getWriteObjectRequest(blobInfo, opts);
+
+    UnbufferedWritableByteChannelSession<WriteObjectResponse> session =
+        ResumableMedia.gapic()
+            .write()
+            .byteChannel(
+                storageClient.writeObjectCallable().withDefaultCallContext(grpcCallContext))
+            .setHasher(Hasher.noop())
+            .setByteStringStrategy(ByteStringStrategy.noCopy())
+            .direct()
+            .unbuffered()
+            .setRequest(req)
+            .build();
+
+    // Specifically not in the try-with, so we don't close the provided stream
+    ReadableByteChannel src =
+        Channels.newChannel(firstNonNull(content, new ByteArrayInputStream(ZERO_BYTES)));
+    try (UnbufferedWritableByteChannel dst = session.open()) {
+      ByteStreams.copy(src, dst);
+    } catch (Exception e) {
       throw StorageException.coalesce(e);
     }
+    return getBlob(session.getResult());
   }
 
   @Override
@@ -309,7 +332,7 @@ public Blob internalCreateFrom(Path path, BlobInfo info, Opts<ObjectTargetOpt> o
       }
       return codecs.blobInfo().decode(object).asBlob(this);
     } catch (InterruptedException | ExecutionException e) {
-      throw StorageException.coalesce(e);
+      throw StorageException.coalesce(e.getCause());
     }
   }
 
@@ -359,7 +382,14 @@ public Blob createFrom(
   @Override
   public Bucket get(String bucket, BucketGetOption... options) {
     Opts<BucketSourceOpt> unwrap = Opts.unwrap(options);
-    return internalBucketGet(bucket, unwrap);
+    try {
+      return internalBucketGet(bucket, unwrap);
+    } catch (StorageException e) {
+      if (e.getCode() == 404) {
+        return null;
+      }
+      throw e;
+    }
   }
 
   @Override

google-cloud-storage/src/main/java/com/google/cloud/storage/StorageImpl.java

@@ -21,7 +21,6 @@
 import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.base.Preconditions.checkState;
 import static java.nio.charset.StandardCharsets.UTF_8;
-import static java.util.concurrent.Executors.callable;
 
 import com.google.api.core.ApiFuture;
 import com.google.api.gax.paging.Page;
@@ -37,12 +36,14 @@
 import com.google.cloud.Policy;
 import com.google.cloud.WriteChannel;
 import com.google.cloud.storage.Acl.Entity;
+import com.google.cloud.storage.ApiaryUnbufferedReadableByteChannel.ApiaryReadRequest;
 import com.google.cloud.storage.BlobReadChannelV2.BlobReadChannelContext;
 import com.google.cloud.storage.HmacKey.HmacKeyMetadata;
 import com.google.cloud.storage.PostPolicyV4.ConditionV4Type;
 import com.google.cloud.storage.PostPolicyV4.PostConditionsV4;
 import com.google.cloud.storage.PostPolicyV4.PostFieldsV4;
 import com.google.cloud.storage.PostPolicyV4.PostPolicyV4Document;
+import com.google.cloud.storage.UnbufferedReadableByteChannelSession.UnbufferedReadableByteChannel;
 import com.google.cloud.storage.UnifiedOpts.ObjectSourceOpt;
 import com.google.cloud.storage.UnifiedOpts.ObjectTargetOpt;
 import com.google.cloud.storage.UnifiedOpts.Opts;
@@ -59,9 +60,10 @@
 import com.google.common.collect.Maps;
 import com.google.common.hash.Hashing;
 import com.google.common.io.BaseEncoding;
-import com.google.common.io.CountingOutputStream;
+import com.google.common.io.ByteStreams;
 import com.google.common.primitives.Ints;
 import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
@@ -73,6 +75,7 @@
 import java.nio.ByteBuffer;
 import java.nio.channels.Channels;
 import java.nio.channels.ReadableByteChannel;
+import java.nio.channels.WritableByteChannel;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.text.SimpleDateFormat;
@@ -604,9 +607,25 @@ public byte[] readAllBytes(BlobId blob, BlobSourceOption... options) {
     Opts<ObjectSourceOpt> unwrap = Opts.unwrap(options);
     Opts<ObjectSourceOpt> resolve = unwrap.resolveFrom(blob);
     ImmutableMap<StorageRpc.Option, ?> optionsMap = resolve.getRpcOptions();
-    ResultRetryAlgorithm<?> algorithm =
-        retryAlgorithmManager.getForObjectsGet(storageObject, optionsMap);
-    return run(algorithm, () -> storageRpc.load(storageObject, optionsMap), Function.identity());
+    boolean autoGzipDecompression =
+        Utils.isAutoGzipDecompression(resolve, /*defaultWhenUndefined=*/ true);
+    UnbufferedReadableByteChannelSession<StorageObject> session =
+        ResumableMedia.http()
+            .read()
+            .byteChannel(BlobReadChannelContext.from(this))
+            .setAutoGzipDecompression(autoGzipDecompression)
+            .unbuffered()
+            .setApiaryReadRequest(
+                new ApiaryReadRequest(storageObject, optionsMap, ByteRangeSpec.nullRange()))
+            .build();
+    ByteArrayOutputStream baos = new ByteArrayOutputStream();
+    try (UnbufferedReadableByteChannel r = session.open();
+        WritableByteChannel w = Channels.newChannel(baos)) {
+      ByteStreams.copy(r, w);
+    } catch (IOException e) {
+      throw StorageException.translate(e);
+    }
+    return baos.toByteArray();
   }
 
   @Override
@@ -638,19 +657,26 @@ public void downloadTo(BlobId blob, Path path, BlobSourceOption... options) {
 
   @Override
   public void downloadTo(BlobId blob, OutputStream outputStream, BlobSourceOption... options) {
-    final CountingOutputStream countingOutputStream = new CountingOutputStream(outputStream);
     final StorageObject pb = codecs.blobId().encode(blob);
-    ImmutableMap<StorageRpc.Option, ?> optionsMap =
-        Opts.unwrap(options).resolveFrom(blob).getRpcOptions();
-    ResultRetryAlgorithm<?> algorithm = retryAlgorithmManager.getForObjectsGet(pb, optionsMap);
-    run(
-        algorithm,
-        callable(
-            () -> {
-              storageRpc.read(
-                  pb, optionsMap, countingOutputStream.getCount(), countingOutputStream);
-            }),
-        Function.identity());
+    Opts<ObjectSourceOpt> resolve = Opts.unwrap(options).resolveFrom(blob);
+    ImmutableMap<StorageRpc.Option, ?> optionsMap = resolve.getRpcOptions();
+    boolean autoGzipDecompression =
+        Utils.isAutoGzipDecompression(resolve, /*defaultWhenUndefined=*/ true);
+    UnbufferedReadableByteChannelSession<StorageObject> session =
+        ResumableMedia.http()
+            .read()
+            .byteChannel(BlobReadChannelContext.from(this))
+            .setAutoGzipDecompression(autoGzipDecompression)
+            .unbuffered()
+            .setApiaryReadRequest(new ApiaryReadRequest(pb, optionsMap, ByteRangeSpec.nullRange()))
+            .build();
+    // don't close the provided stream
+    WritableByteChannel w = Channels.newChannel(outputStream);
+    try (UnbufferedReadableByteChannel r = session.open()) {
+      ByteStreams.copy(r, w);
+    } catch (IOException e) {
+      throw StorageException.translate(e);
+    }
   }
 
   @Override