fix data transfer over RCTBridge, for now use base64 strings until they support binary data transfer

UdpSocket.ios.js

@@ -16,6 +16,7 @@ var React = require('react-native')
 var mixInEventEmitter = require('mixInEventEmitter')
 var DeviceEventEmitter = require('RCTDeviceEventEmitter')
 var Sockets = require('NativeModules').UdpSockets
+var base64 = require('base64-js')
 var noop = function () {}
 var instances = 0
 var STATE = {
@@ -96,7 +97,7 @@ UdpSocket.prototype.close = function() {
 UdpSocket.prototype._onReceive = function(info) {
   this._debug('received', info)
 
-  var buf = toByteArray(info.data)
+  var buf = base64.toByteArray(info.data)
   var rinfo = {
     address: info.address,
     port: info.port,
@@ -145,15 +146,23 @@ UdpSocket.prototype.send = function(buffer, offset, length, port, address, callb
   }
 
   callback = callback || noop
+  var str
   if (typeof buffer === 'string') {
-    buffer = toByteArray(buffer)
+    console.warn('socket.send(): interpreting as base64')
+    str = buffer
   }
   else if (typeof Buffer !== 'undefined' && Buffer.isBuffer(buffer)) {
-    buffer = buffer.toJSON().data
+    str = buffer.toString('base64')
+  }
+  else if (buffer instanceof Uint8Array || Array.isArray(buffer)) {
+    str = base64.fromByteArray(buffer)
+  }
+  else {
+    throw new Error('invalid message format')
   }
 
-  self._debug('sending', buffer)
-  Sockets.send(this._id, buffer, +port, address, function(err) {
+  self._debug('sending', buffer, str)
+  Sockets.send(this._id, str, +port, address, function(err) {
     if (err) {
       self._debug('send failed', err)
       return callback(err)
@@ -215,29 +224,4 @@ mixInEventEmitter(UdpSocket, {
   'error': true
 })
 
-function toByteArray(obj) {
-  if (typeof obj === 'object') {
-    var i = 0
-    var arr = []
-    while (true) {
-      if (!(i in obj)) break
-
-      arr.push(+obj[i])
-      i++
-    }
-
-    return new Uint8Array(arr)
-  }
-  else if (typeof obj !== 'string') {
-    throw new Error('unsupported format')
-  }
-
-  var uint = new Uint8Array(obj.length);
-  for (var i = 0, l = obj.length; i < l; i++){
-    uint[i] = obj.charCodeAt(i);
-  }
-
-  return new Uint8Array(uint);
-}
-
 module.exports = UdpSocket

UdpSockets.m

@@ -58,13 +58,16 @@ RCT_EXPORT_METHOD(bind:(NSString*)cId
 }
 
 RCT_EXPORT_METHOD(send:(NSString*)cId
-                  data:(NSData*)data
+                  base64String:(NSString*)base64String
                   port:(int)port
                   address:(NSString*)address
                   callback:(RCTResponseSenderBlock)callback) {
     UdpSocketClient* client = [self findClient:cId callback:callback];
     if (!client) return;
-    
+
+    // iOS7+
+    // TODO: use https://github.com/nicklockwood/Base64 for compatibility with earlier iOS versions
+    NSData *data = [[NSData alloc] initWithBase64EncodedString:base64String options:0];
     [client send:data remotePort:port remoteAddress:address callback:callback];
     if (callback) callback(@[]);
 }
@@ -83,15 +86,10 @@ RCT_EXPORT_METHOD(close:(NSString*)cId
 - (void) onData:(UdpSocketClient*) client data:(NSData *)data host:(NSString *)host port:(uint16_t)port
 {
     NSString *clientID = [[_clients allKeysForObject:client] objectAtIndex:0];
-    NSPropertyListFormat format;
-    NSArray* arr = [NSPropertyListSerialization propertyListFromData:data
-                                                    mutabilityOption:NSPropertyListMutableContainers
-                                                              format:&format
-                                                    errorDescription:NULL];
-    
+    NSString *base64String = [data base64EncodedStringWithOptions:0];
     [self.bridge.eventDispatcher sendDeviceEventWithName:[NSString stringWithFormat:@"udp-%@-data", clientID]
                                                     body:@{
-                                                           @"data": arr,
+                                                           @"data": base64String,
                                                            @"address": host,
                                                            @"port": [NSNumber numberWithInt:port]
                                                            }

index.ios.js

@@ -16,7 +16,8 @@ function randomPort() {
   return Math.random() * 65536 | 0
 }
 
-var dgram = require('RCTUDP')
+var base64 = require('base64-js')
+var dgram = require('dgram')
 var a = dgram.createSocket('udp4')
 var aPort = randomPort()
 a.bind(bPort, function(err) {
@@ -92,24 +93,8 @@ var styles = StyleSheet.create({
   },
 });
 
-
+// only works for 8-bit chars
 function toByteArray(obj) {
-  if (typeof obj === 'object') {
-    var i = 0
-    var arr = []
-    while (true) {
-      if (!(i in obj)) break
-
-      arr.push(+obj[i])
-      i++
-    }
-
-    return new Uint8Array(arr)
-  }
-  else if (typeof obj !== 'string') {
-    throw new Error('unsupported format')
-  }
-
   var uint = new Uint8Array(obj.length);
   for (var i = 0, l = obj.length; i < l; i++){
     uint[i] = obj.charCodeAt(i);

package.json

@@ -11,7 +11,7 @@
   },
   "repository": {
     "type": "git",
-    "url": "https://github.com/tradle/react-native-udp.git"
+    "url": "https://github.com/tradle/react-native-udp"
   },
   "keywords": [
     "react-component",
@@ -22,13 +22,17 @@
     "sockets",
     "ios"
   ],
-  "author": "Mark Vayngrib <mark.vayngrib@lablz.com>",
+  "author": {
+    "name": "Mark Vayngrib",
+    "email": "mark.vayngrib@lablz.com"
+  },
   "license": "MIT",
   "bugs": {
     "url": "https://github.com/tradle/react-native-udp/issues"
   },
   "homepage": "https://github.com/tradle/react-native-udp",
   "dependencies": {
+    "base64-js": "0.0.8",
     "react-native": "^0.4.2"
   }
 }