fix sync.stat() failure for multibyte paths

[mhama]

About

client.stat() fails for files with multi-byte filename like "あああ.txt" (japanese filename)
This will fix the problem.

Root Cause:

In _sendCommandWithArg method, it uses arg.length for the binary payload size of arg. But if arg is multi-byte string, arg.length is wrong to be used for the purpose, because it is the count of characters and not the size of bytes.

Solution

Use Buffer.byteLength(arg, 'utf-8') as the binary payload size of arg.
see: https://nodejs.org/api/buffer.html#buffer_class_method_buffer_bytelength_string_encoding

Related

#86 may be fixed with this fix.

[koral--]

Thanks.

[sunjw]

Please release a new version with this fix in npm. It affects all command in Sync, including pull and push.