如何用django上传文件到服务器？

# views.py
from django.core.files.storage import FileSystemStorage
from django.shortcuts import render

def upload_file(request):
    if request.method == 'POST' and request.FILES['file']:
        file = request.FILES['file']
        fs = FileSystemStorage()
        filename = fs.save(file.name, file)
        uploaded_file_url = fs.url(filename)
        return render(request, 'upload.html', {
            'uploaded_file_url': uploaded_file_url
        })
    return render(request, 'upload.html')

<!-- upload.html -->
<form method="post" enctype="multipart/form-data">
  {% csrf_token %}
  <input type="file" name="file">
  <button type="submit">Upload</button>
</form>