[leap] Catch malformed packet

See leapmotion/leapjs#219

lib/leap.js

@@ -15,10 +15,21 @@ const leapjs = require('leapjs')
 const controller = new leapjs.Controller()
 
 if (args.leap) {
-  controller.on('connect', () => log.info('Successfully connected.'))
   controller.on('streamingStarted', () => log.info('A Leap device has been connected.'))
   controller.on('streamingStopped', () => log.info('A Leap device has been disconnected.'))
-
+  controller.on('connect', function () {
+    log.info('Successfully connected.')
+    // NOTE: this block fixes the lame leapmotion's handling of malformed packets
+    // https://github.com/leapmotion/leapjs/issues/219
+    const originalHandleData = this.connection.handleData
+    this.connection.handleData = function (data) {
+      try {
+        return originalHandleData.call(this, data)
+      } catch (e) {
+        log.warning(e)
+      }
+    }
+  })
   controller.connect()
 }
 
@@ -45,7 +56,6 @@ module.exports = {
         z: normalizedPosition[1] * box[2]
       }
     }
-
     return mockHand.update(box)
-  },
+  }
 }