title: URI must be ascii only when Spreadsheet open file?
body: <p>I want to read excel file, I use follow code to open excel:</p>
  
  <pre><code>file = Roo::Spreadsheet.open(file_path)
  </code></pre>
  
  <p>But when <code>file_path</code> contain japanese,error occur:</p>
  
  <pre><code>URI::InvalidURIError: URI must be ascii only "/Users/myname/Project/Test/tmp/data/\u{611b}\u{77e5}\u{770c}/s000226.xlsx"
  </code></pre>
  
  <p>I tried URI to parse <code>file_path</code> but not work. 
  How to fix it? Thanks you.</p>