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feat: implement synchronous file system APIs with worker support & 100% test coverage

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This commit is contained in:
Rody Davis
2026-06-07 17:32:22 -07:00
parent fcc1a194c4
commit afb6302f0d
8 changed files with 1715 additions and 55 deletions
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experimental/web_file_system/lib/src/entities/web_file.dart
+128 -22
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@@ -52,8 +52,38 @@ class WebFile extends FileSystemEntity implements File {
}
@override
void createSync({bool recursive = false, bool exclusive = false}) =>
throw UnsupportedError('Sync not supported');
void createSync({bool recursive = false, bool exclusive = false}) {
if (existsSync()) {
if (exclusive) {
throw FileSystemException(
'File already exists',
path,
const OSError('EEXIST', 17),
);
}
return;
}
final parentPath = _fs.path.dirname(path);
final parentType = _fs.typeSync(parentPath);
if (parentType == FileSystemEntityType.notFound) {
if (recursive) {
_fs.directory(parentPath).createSync(recursive: true);
} else {
throw FileSystemException(
'Cannot create file, path = \'$path\' (OS Error: No such file or directory, errno = 2)',
path,
);
}
} else if (parentType != FileSystemEntityType.directory) {
throw FileSystemException(
'Cannot create file, path = \'$path\' (OS Error: Not a directory, errno = 20)',
path,
);
}
writeAsBytesSync([]);
}
@override
Future<File> copy(String newPath) async {
@@ -76,7 +106,11 @@ class WebFile extends FileSystemEntity implements File {
}
@override
File copySync(String newPath) => throw UnsupportedError('Sync not supported');
File copySync(String newPath) {
final bytes = readAsBytesSync();
_fs.file(newPath).writeAsBytesSync(bytes);
return WebFile(_fs, newPath);
}
@override
Future<int> length() async {
@@ -85,7 +119,7 @@ class WebFile extends FileSystemEntity implements File {
}
@override
int lengthSync() => throw UnsupportedError('Sync not supported');
int lengthSync() => statSync().size;
@override
Future<DateTime> lastModified() async {
@@ -94,7 +128,7 @@ class WebFile extends FileSystemEntity implements File {
}
@override
DateTime lastModifiedSync() => throw UnsupportedError('Sync not supported');
DateTime lastModifiedSync() => statSync().modified;
@override
Future<DateTime> lastAccessed() async {
@@ -102,7 +136,7 @@ class WebFile extends FileSystemEntity implements File {
}
@override
DateTime lastAccessedSync() => throw UnsupportedError('Sync not supported');
DateTime lastAccessedSync() => statSync().accessed;
@override
Future<dynamic> setLastAccessed(DateTime time) async {}
@@ -190,7 +224,27 @@ class WebFile extends FileSystemEntity implements File {
FileMode mode = FileMode.write,
bool flush = false,
}) {
throw UnsupportedError('Sync not supported');
if (mode == FileMode.append) {
throw UnsupportedError('Append not yet optimized');
}
final parentPath = _fs.path.dirname(path);
if (_fs.typeSync(parentPath) != FileSystemEntityType.directory) {
throw FileSystemException(
'Cannot open file, path = \'$path\' (OS Error: No such file or directory, errno = 2)',
path,
);
}
final pathBytes = utf8.encode(path);
final pathLen = pathBytes.length;
final request = Uint8List(4 + pathLen + bytes.length);
final bd = ByteData.sublistView(request);
bd.setUint32(0, pathLen, Endian.little);
request.setRange(4, 4 + pathLen, pathBytes);
request.setRange(4 + pathLen, request.length, bytes);
_fs.makeSyncCall(4, request);
}
@override
@@ -210,7 +264,7 @@ class WebFile extends FileSystemEntity implements File {
Encoding encoding = utf8,
bool flush = false,
}) {
throw UnsupportedError('Sync not supported');
writeAsBytesSync(encoding.encode(contents), mode: mode, flush: flush);
}
@override
@@ -280,7 +334,22 @@ class WebFile extends FileSystemEntity implements File {
}
@override
Uint8List readAsBytesSync() => throw UnsupportedError('Sync not supported');
Uint8List readAsBytesSync() {
final type = _fs.typeSync(path);
if (type == FileSystemEntityType.notFound) {
throw FileSystemException(
'Cannot open file, path = \'$path\' (OS Error: No such file or directory, errno = 2)',
path,
);
}
if (type == FileSystemEntityType.directory) {
throw FileSystemException(
'Cannot open file, path = \'$path\' (OS Error: Is a directory, errno = 21)',
path,
);
}
return _fs.makeSyncCall(3, utf8.encode(path));
}
@override
Future<String> readAsString({Encoding encoding = utf8}) async {
@@ -289,18 +358,21 @@ class WebFile extends FileSystemEntity implements File {
}
@override
String readAsStringSync({Encoding encoding = utf8}) =>
throw UnsupportedError('Sync not supported');
String readAsStringSync({Encoding encoding = utf8}) {
return encoding.decode(readAsBytesSync());
}
@override
Future<List<String>> readAsLines({Encoding encoding = utf8}) async {
final str = await readAsString(encoding: encoding);
return str.split('\n');
return const LineSplitter().convert(str);
}
@override
List<String> readAsLinesSync({Encoding encoding = utf8}) =>
throw UnsupportedError('Sync not supported');
List<String> readAsLinesSync({Encoding encoding = utf8}) {
final str = readAsStringSync(encoding: encoding);
return const LineSplitter().convert(str);
}
@override
Future<bool> exists() async {
@@ -313,7 +385,9 @@ class WebFile extends FileSystemEntity implements File {
}
@override
bool existsSync() => throw UnsupportedError('Sync not supported');
bool existsSync() {
return _fs.typeSync(path, followLinks: false) == FileSystemEntityType.file;
}
@override
Future<File> rename(String newPath) async {
@@ -337,8 +411,33 @@ class WebFile extends FileSystemEntity implements File {
}
@override
File renameSync(String newPath) =>
throw UnsupportedError('Sync not supported');
File renameSync(String newPath) {
final type = _fs.typeSync(path, followLinks: false);
if (type == FileSystemEntityType.notFound) {
throw FileSystemException(
'Cannot rename file, path = \'$path\' (OS Error: No such file or directory, errno = 2)',
path,
);
}
final newParentDir = _fs.path.dirname(newPath);
if (_fs.typeSync(newParentDir) != FileSystemEntityType.directory) {
throw FileSystemException(
'Cannot rename file, path = \'$path\' (OS Error: No such file or directory, errno = 2)',
path,
);
}
final pathBytes = utf8.encode(path);
final newPathBytes = utf8.encode(newPath);
final request = Uint8List(4 + pathBytes.length + newPathBytes.length);
final bd = ByteData.sublistView(request);
bd.setUint32(0, pathBytes.length, Endian.little);
request.setRange(4, 4 + pathBytes.length, pathBytes);
request.setRange(4 + pathBytes.length, request.length, newPathBytes);
_fs.makeSyncCall(12, request);
return WebFile(_fs, newPath);
}
@override
Future<FileSystemEntity> delete({bool recursive = false}) async {
@@ -348,14 +447,22 @@ class WebFile extends FileSystemEntity implements File {
}
@override
void deleteSync({bool recursive = false}) =>
throw UnsupportedError('Sync not supported');
void deleteSync({bool recursive = false}) {
final type = _fs.typeSync(path, followLinks: false);
if (type == FileSystemEntityType.notFound) {
throw FileSystemException(
'Cannot delete file, path = \'$path\' (OS Error: No such file or directory, errno = 2)',
path,
);
}
_fs.makeSyncCall(6, utf8.encode(path));
}
@override
Future<FileStat> stat() => _fs.stat(path);
@override
FileStat statSync() => throw UnsupportedError('Sync not supported');
FileStat statSync() => _fs.statSync(path);
@override
Uri get uri => Uri.parse(path);
@@ -374,8 +481,7 @@ class WebFile extends FileSystemEntity implements File {
Future<String> resolveSymbolicLinks() => _fs.resolveSymbolicLinks(path);
@override
String resolveSymbolicLinksSync() =>
throw UnsupportedError('Sync not supported');
String resolveSymbolicLinksSync() => _fs.resolveSymbolicLinksSync(path);
@override
Stream<FileSystemEvent> watch({