title: Getting file size before post with Python
body: <p>I have an API on my Flask server where I may upload a file from a client, using the following code:</p>
  
  <pre><code>@app.route('/api/uploadJob', methods = ['GET', 'POST'])
  def uolpadJob():
      try:
          if request.method == 'POST':                
              f = request.files['file']
              fullFilePath = os.path.join(app.config['UPLOAD_FOLDER'],
                  secure_filename(f.filename))                    
              #fileSize = ???
              f.save(fullFilePath)
  </code></pre>
  
  <p>I want to get the file size before to save it in my hard disk, so that I can compare it with the available disk space and chose if i want to save it or to return an error message.
  How can i get the file size before the actual upload?</p>