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Add support for sending/receiving unix file descriptors.
Fixes canonical#245.
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import 'dart:convert'; | ||
import 'dart:io'; | ||
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import 'package:dbus/dbus.dart'; | ||
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class TestObject extends DBusObject { | ||
TestObject() : super(DBusObjectPath('/com/canonical/DBusDart')); | ||
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@override | ||
List<DBusIntrospectInterface> introspect() { | ||
return [ | ||
DBusIntrospectInterface('com.canonical.DBusDart', methods: [ | ||
DBusIntrospectMethod('Open', args: [ | ||
DBusIntrospectArgument(DBusSignature('h'), DBusArgumentDirection.out, | ||
name: 'fd') | ||
]) | ||
]) | ||
]; | ||
} | ||
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@override | ||
Future<DBusMethodResponse> handleMethodCall(DBusMethodCall methodCall) async { | ||
if (methodCall.interface != 'com.canonical.DBusDart') { | ||
return DBusMethodErrorResponse.unknownInterface(); | ||
} | ||
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if (methodCall.name == 'Open') { | ||
// Write a file to use for testing. | ||
await File('FD_TEST').writeAsString('Hello World!', flush: true); | ||
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print('Client opens file for reading'); | ||
var file = await File('FD_TEST').open(); | ||
return DBusMethodSuccessResponse( | ||
[DBusUnixFd(ResourceHandle.fromFile(file))]); | ||
} else { | ||
return DBusMethodErrorResponse.unknownMethod(); | ||
} | ||
} | ||
} | ||
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void main(List<String> args) async { | ||
var client = DBusClient.session(); | ||
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String? mode; | ||
if (args.isNotEmpty) { | ||
mode = args[0]; | ||
} | ||
if (mode == 'client') { | ||
var object = DBusRemoteObject(client, | ||
name: 'com.canonical.DBusDart', | ||
path: DBusObjectPath('/com/canonical/DBusDart')); | ||
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var result = await object.callMethod('com.canonical.DBusDart', 'Open', [], | ||
replySignature: DBusSignature('h')); | ||
var fd = result.returnValues[0] as DBusUnixFd; | ||
var file = fd.handle.toFile(); | ||
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print('Contents of file:'); | ||
print(utf8.decode(await file.read(1024))); | ||
} else if (mode == 'server') { | ||
await client.requestName('com.canonical.DBusDart'); | ||
var object = TestObject(); | ||
await client.registerObject(object); | ||
} else { | ||
print('Usage:'); | ||
print('file_descriptor.dart server - Run as a server'); | ||
print('file_descriptor.dart client - Run as a client'); | ||
} | ||
} |
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