upload.py 文件源码

def index(request):
    form = UploadForm(request)
    if form.validate_on_submit():
        image = form.image.data
        # NOTE: trusting user submitted file names here, the name should be
        # sanitized in production.
        uploaded_file = Path(request.app.config.UPLOAD_DIR) / image.name
        uploaded_file.write_bytes(image.body)
        description = form.description.data or 'no description'
        session.setdefault('files', []).append((image.name, description))
        return response.redirect('/')
    img = '<section><img src="/img/{}"><p>{}</p><hr></section>'
    images = ''.join(img.format(i, d) for i, d in session.get('files', []))
    content = f"""
    <h1>Sanic-WTF file field validators example</h1>
    {images}
    <form action="" method="POST" enctype="multipart/form-data">
      {'<br>'.join(form.csrf_token.errors)}
      {form.csrf_token}
      {'<br>'.join(form.image.errors)}
      {'<br>'.join(form.description.errors)}
      <br> {form.image.label}
      <br> {form.image}
      <br> {form.description.label}
      <br> {form.description(size=20, placeholder="description")}
      <br> {form.submit}
    </form>
    """
    return response.html(content)