Merge pull request #13 from eugenechyrski/master

Support for rsocket over websocket in browser

Author: linux-china

lib/core/rsocket_requester.dart

@@ -261,10 +261,10 @@ class RSocketRequester extends RSocket {
       case frame_types.REQUEST_RESPONSE:
         var requestResponseFrame = frame as RequestResponseFrame;
         if (responder != null && requestResponseFrame.payload != null) {
-          responder!.requestResponse!(requestResponseFrame.payload)
+          responder!.subscribe!(requestResponseFrame.payload)
               .then((payload) {
             connection.write(
-                FrameCodec.encodePayloadFrame(header.streamId, true, payload));
+                FrameCodec.encodePayloadFrame(header.streamId, false, payload));
           }).catchError((error) {
             var rsocketError = convertToRSocketException(error);
             connection.write(FrameCodec.encodeErrorFrame(

lib/core/rsocket_responder.dart

@@ -1,4 +1,6 @@
-import 'dart:io';
+
+
+import 'package:universal_io/io.dart';
 
 import '../core/rsocket_requester.dart';
 import '../duplex_connection.dart';

lib/duplex_connection.dart

@@ -1,6 +1,8 @@
-import 'dart:io';
 import 'dart:typed_data';
 
+import 'package:universal_io/io.dart';
+import 'package:web_socket_channel/web_socket_channel.dart';
+
 import 'io/bytes.dart';
 import 'rsocket.dart';
 
@@ -56,14 +58,16 @@ class TcpDuplexConnection extends DuplexConnection {
 }
 
 class WebSocketDuplexConnection extends DuplexConnection {
-  WebSocket webSocket;
-  bool closed = false;
+  WebSocketChannel webSocket;
+  bool closed = true;
 
   WebSocketDuplexConnection(this.webSocket);
 
   @override
   void init() {
-    webSocket.listen((message) {
+
+
+      webSocket.stream.listen((message) {
       var data = message as List<int>;
       var frameLenBytes = i24ToBytes(data.length);
       receiveHandler!(Uint8List.fromList(frameLenBytes + data));
@@ -79,15 +83,14 @@ class WebSocketDuplexConnection extends DuplexConnection {
     if (!closed) {
       closed = true;
       _availability = 0.0;
-      webSocket.close();
       closeHandler?.call();
     }
   }
 
   @override
   void write(Uint8List chunk) {
     //remove frame length: 3 bytes
-    webSocket.add(chunk.sublist(3));
+    webSocket.sink.add(chunk.sublist(3));
   }
 }
 
@@ -97,10 +100,13 @@ Future<DuplexConnection> connectRSocket(String url, TcpChunkHandler handler) {
   if (scheme == 'tcp') {
     var socketFuture = Socket.connect(uri.host, uri.port);
     return socketFuture.then((socket) => TcpDuplexConnection(socket));
-  } else if (scheme == 'ws' || scheme == 'wss') {
-    var socketFuture = WebSocket.connect(url);
-    return socketFuture.then((socket) => WebSocketDuplexConnection(socket));
+  }if (scheme == 'ws' || scheme == 'wss') {
+    final websocket = WebSocketChannel.connect(
+      Uri.parse(url),
+    );
+    return Future.value(WebSocketDuplexConnection(websocket));
   } else {
     return Future.error('${scheme} unsupported');
   }
 }
+

lib/io/bytes.dart

@@ -155,7 +155,16 @@ class RSocketByteBuffer {
 }
 
 Uint8List i64ToBytes(int value) {
-  return Uint8List(8)..buffer.asByteData().setUint64(0, value, Endian.big);
+  //because of browser limitations
+  int l = value;
+  var b = BytesBuilder();
+  for (int i = 7; i >= 0; i--) {
+    b.addByte(l & 0xFF);
+
+    l >>= 8;
+  }
+  return Uint8List.fromList(b.toBytes().reversed.toList());
+  //return Uint8List(8)..buffer.asByteData().setUint64(0, value, Endian.big);
 }
 
 Uint8List i32ToBytes(int value) {

lib/rsocket.dart

@@ -26,7 +26,7 @@ class RSocket implements Closeable, Availability {
       (Stream<Payload> payloads) => Stream.error(Exception('Unsupported'));
   MetadataPush? metadataPush =
       (Payload? payload) => Future.error(Exception('Unsupported'));
-
+  RequestResponse? subscribe= (Payload? payload)=> Future.error(Exception('Unsupported'));
   @override
   void close() {}
 

lib/rsocket_server.dart

@@ -1,4 +1,5 @@
-import 'dart:io';
+
+import 'package:universal_io/io.dart';
 
 import 'core/rsocket_responder.dart';
 import 'rsocket.dart';

pubspec.yaml

@@ -7,7 +7,7 @@ issue_tracker: https://github.com/rsocket/rsocket-dart/issues
 environment:
   sdk: '>=2.12.0 <3.0.0'
 dependencies:
-  rxdart: ^0.27.2
-  collection: ^1.15.0-nullsafety.4
+  web_socket_channel:
+  universal_io:
 dev_dependencies:
   test: ^1.19.2