title: flask file upload not working
body: <p>I have problem with file upload. I getting no errors but i can't to find file. I was looking for solution but without success. Can anyone help to me?
  My code:</p>
  
  <pre><code>UPLOAD_FOLDER = '/upload/'
  ALLOWED_EXTENSIONS = set(['.xlsx', '.xls'])
  app = Flask(__name__)
  app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
  
  def allowed_file(filename):
    print(filename)
    return '.' in filename and \
         filename.rsplit('.', 1)[1] in ALLOWED_EXTENSIONS
  @app.route('/file_upload', methods=['GET', 'POST'])
  def file():
      if request.method == 'POST':
          print(os.getcwd())
          if 'file' not in request.files:
              flash('No file part')
              return redirect(request.url)
          file = request.files['file']
          # if user does not select file, browser also
          # submit a empty part without filename
          if file.filename == '':
              flash('No selected file')
              return redirect(request.url)
          if file and allowed_file(file.filename):
              print(filename)
              filename = secure_filename(file.filename)
              print(filename)
              file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
              return redirect(url_for('uploaded_file', filename=filename))
  
      return render_template("/file_upload.html", role="ok")
  </code></pre>
  
  <p>this is example form <a href="http://flask.pocoo.org/docs/0.11/patterns/fileuploads/" rel="nofollow">Flask Doc</a></p>