Emit transfer event on download.

Author: bompi88

lib/client.js

@@ -292,18 +292,27 @@ Client.prototype.download = function(src, dest, callback) {
       return callback(err);
     }
 
-    var sftp_readStream = sftp.createReadStream(src);
-    sftp_readStream.on('error', function(err){
-      callback(err);
-    });
-    sftp_readStream.pipe(fs.createWriteStream(dest))
-    .on('close',function(){
-      self.emit('read', src);
-      self.close();
-      callback(null);
-    })
-    .on('error', function(err){
-      callback(err);
+    sftp.open(src, 'r', function(err, fd) {
+      sftp.fstat(fd, function(err, stats) {
+        var bufferSize = stats.size;
+
+        var sftp_readStream = sftp.createReadStream(src);
+        sftp_readStream.on('data', function(data) {
+          bytesDownloaded += data.length;
+          self.emit('transfer', data, bytesDownloaded, bufferSize);
+        })
+        sftp_readStream.on('error', function(err){
+          callback(err);
+        });
+        sftp_readStream.pipe(fs.createWriteStream(dest))
+        .on('close',function(){
+          self.emit('read', src);
+          callback(null);
+        })
+        .on('error', function(err){
+          callback(err);
+        });
+      });
     });
   });
 };