add i18n support

mscdex#123
Thanks @vavere

Author: icetee

lib/connection.js

@@ -66,6 +66,7 @@ var FTP = module.exports = function() {
   this._keepalive = undefined;
   this._ending = false;
   this._parser = undefined;
+  this._utf8 = false;
   this.options = {
     host: undefined,
     port: undefined,
@@ -234,8 +235,20 @@ FTP.prototype.connect = function(options) {
         cmd = 'FEAT';
         self._send(cmd, reentry, true);
       } else if (cmd === 'FEAT') {
-        if (!err)
+        if (!err) {
           self._feat = Parser.parseFeat(text);
+          self._utf8 = self._feat.indexOf('UTF8')>=0 // RFC #2640
+        }
+        if (self._utf8) {
+          // required by MS IIS 7.x FTP implementation which think based on
+          // http://tools.ietf.org/html/draft-ietf-ftpext-utf-8-option-00
+          cmd = 'OPTS';
+          self._send('OPTS UTF8 ON', reentry, true);
+        } else {
+          cmd = 'TYPE';
+          self._send('TYPE I', reentry, true);
+        }
+      } else if (cmd === 'OPTS') { // ignore OPTS UTF8 result
         cmd = 'TYPE';
         self._send('TYPE I', reentry, true);
       } else if (cmd === 'TYPE')
@@ -444,7 +457,7 @@ FTP.prototype.list = function(path, zcomp, cb) {
     }
 
     source.on('data', function(chunk) {
-      buffer += decoder.write(chunk);
+       buffer += chunk.toString(self._utf8 ? 'utf8' : 'binary');
     });
     source.once('error', function(err) {
       if (!sock.aborting)
@@ -743,12 +756,12 @@ FTP.prototype.rmdir = function(path, recursive, cb) { // RMD is optional
   if (!recursive) {
     return this._send('RMD ' + path, cb);
   }
-  
+
   var self = this;
   this.list(path, function(err, list) {
     if (err) return cb(err);
     var idx = 0;
-    
+
     // this function will be called once per listing entry
     var deleteNextEntry;
     deleteNextEntry = function(err) {
@@ -760,9 +773,9 @@ FTP.prototype.rmdir = function(path, recursive, cb) { // RMD is optional
           return self.rmdir(path, cb);
         }
       }
-      
+
       var entry = list[idx++];
-      
+
       // get the path to the file
       var subpath = null;
       if (entry.name[0] === '/') {
@@ -776,7 +789,7 @@ FTP.prototype.rmdir = function(path, recursive, cb) { // RMD is optional
           subpath = path + '/' + entry.name
         }
       }
-      
+
       // delete the entry (recursively) according to its type
       if (entry.type === 'd') {
         if (entry.name === "." || entry.name === "..") {