如何使用Bottle框架上传和保存文件

问题描述

HTML:

<form action="/upload" method="post" enctype="multipart/form-data">
  Category:      <input type="text" name="category" />
  Select a file: <input type="file" name="upload" />
  <input type="submit" value="Start upload" />
</form>

查看:

@route('/upload', method='POST')
def do_login():
    category   = request.forms.get('category')
    upload     = request.files.get('upload')
    name, ext = os.path.splitext(upload.filename)
    if ext not in ('png','jpg','jpeg'):
        return 'File extension not allowed.'

    save_path = get_save_path_for_category(category)
    upload.save(save_path) # appends upload.filename automatically
    return 'OK'

我正在尝试执行此代码，但无法正常工作.我在做什么错了?

I'm trying to do this code but it is not working. What I'm doing wrong?

推荐答案

从 bottle-0.12 开始， FileUpload 类是通过其 upload.save()功能实现的.

Starting from bottle-0.12 the FileUpload class was implemented with its upload.save() functionality.

以下是 Bottle-0.12 的示例:

import os
from bottle import route, request, static_file, run

@route('/')
def root():
    return static_file('test.html', root='.')

@route('/upload', method='POST')
def do_upload():
    category = request.forms.get('category')
    upload = request.files.get('upload')
    name, ext = os.path.splitext(upload.filename)
    if ext not in ('.png', '.jpg', '.jpeg'):
        return "File extension not allowed."

    save_path = "/tmp/{category}".format(category=category)
    if not os.path.exists(save_path):
        os.makedirs(save_path)

    file_path = "{path}/{file}".format(path=save_path, file=upload.filename)
    upload.save(file_path)
    return "File successfully saved to '{0}'.".format(save_path)

if __name__ == '__main__':
    run(host='localhost', port=8080)

注意: os.path.splitext()函数在.< ext>"中提供扩展名格式，而不是< ext>".

Note: os.path.splitext() function gives extension in ".<ext>" format, not "<ext>".

• 如果您使用的是 Bottle-0.12 之前的版本，请更改:

• If you use version previous to Bottle-0.12, change:

...
upload.save(file_path)
...

收件人:

    ...
    with open(file_path, 'wb') as open_file:
        open_file.write(upload.file.read())
    ...

• 运行服务器；
• 在浏览器中输入"localhost:8080".

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