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Reduced memory use on processing the new upload. #8222

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merged 2 commits into from
Nov 7, 2024
Merged

Reduced memory use on processing the new upload. #8222

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ecceba4
Reduced memory use on processing the new upload.
isoos Nov 1, 2024
fbb4aae
Update app/lib/package/tarball_storage.dart
isoos Nov 7, 2024
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5 changes: 2 additions & 3 deletions app/lib/package/backend.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -904,8 +904,7 @@ class PackageBackend {
_logger.info('Examining tarball content ($guid).');
final sw = Stopwatch()..start();
final file = File(filename);
final fileBytes = await file.readAsBytes();
final sha256Hash = sha256.convert(fileBytes).bytes;
final sha256Hash = (await file.openRead().transform(sha256).single).bytes;
final archive = await summarizePackageArchive(
filename,
maxContentLength: maxAssetContentLength,
Expand Down Expand Up @@ -946,7 +945,7 @@ class PackageBackend {
await tarballStorage.matchArchiveContentInCanonical(
pubspec.name,
versionString,
fileBytes,
file,
);
if (canonicalContentMatch == ContentMatchStatus.different) {
throw PackageRejectedException.versionExists(
Expand Down
33 changes: 25 additions & 8 deletions app/lib/package/tarball_storage.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'dart:typed_data';
import 'dart:io';

import 'package:crypto/crypto.dart';
import 'package:gcloud/storage.dart';
Expand Down Expand Up @@ -69,26 +69,43 @@ class TarballStorage {
Future<ContentMatchStatus> matchArchiveContentInCanonical(
String package,
String version,
Uint8List bytes,
File file,
) async {
final objectName = tarballObjectName(package, version);
final info = await _canonicalBucket.tryInfo(objectName);
if (info == null) {
return ContentMatchStatus.missing;
}
if (info.length != bytes.length) {
if (info.length != await file.length()) {
return ContentMatchStatus.different;
}
final md5hash = md5.convert(bytes).bytes;
final md5hash = (await file.openRead().transform(md5).single).bytes;
if (!md5hash.byteToByteEquals(info.md5Hash)) {
return ContentMatchStatus.different;
}
final objectBytes = await _canonicalBucket.readAsBytes(objectName);
if (bytes.byteToByteEquals(objectBytes)) {
return ContentMatchStatus.same;
} else {
// Limit memory use while doing the byte-to-byte comparison by streaming it chunk-wise.
final raf = await file.open();
var remainingLength = info.length;
try {
await for (final chunk in _canonicalBucket.read(objectName)) {
if (chunk.isEmpty) continue;
remainingLength -= chunk.length;
if (remainingLength < 0) {
return ContentMatchStatus.different;
}
// TODO: consider rewriting to fixed-length chunk comparison
final fileChunk = await raf.read(chunk.length);
if (!fileChunk.byteToByteEquals(chunk)) {
return ContentMatchStatus.different;
}
}
} finally {
await raf.close();
}
if (remainingLength != 0) {
return ContentMatchStatus.different;
}
return ContentMatchStatus.same;
}

/// Copies the uploaded object from the temp bucket to the canonical bucket.
Expand Down
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