python-3.x - Falcon 和 falcon-multipart + POST 请求上传文件的实现

Question

我正在尝试使用 Falcon 框架(python)实现上传文件的 POST 请求。

我已经使用 falcon-multipart 来实现 multipart/form-data，这允许我在 cgi.FieldStorage() 中检索我的文件，其中文件是二进制格式，但是现在，我需要将此文件写入一个目录中原始扩展名。

这是我正在使用的代码。

应用程序.py:

import falcon

from .files import Resource

from falcon_multipart.middleware import MultipartMiddleware

api = application = falcon.API(middleware=[MultipartMiddleware()])

files = Resource()
api.add_route('/files', files)

文件.py:

import io
import os
import shutil

import falcon
import json


class Resource(object):

   _storage_path = './uploaded_files'

   def on_post(self, req, resp):
        """
        POST METHOD
        """
        # Retrieve file extension
        ext = req.get_param('extension')

        # Retrieve input_file
        input_file = req.get_param('file')

        # Read file as binary
        raw = input_file.file.read()

        # Retrieve filename
        filename = input_file.filename

        # Define file_path
        file_path = os.path.join(self._storage_path, filename)

        # Write to a temporary file to prevent incomplete files from
        # being used.
        temp_file_path = file_path + '~'

        # Finally write the data to a temporary file
        with open(temp_file_path, 'wb') as output_file:
            shutil.copyfileobj(raw, output_file)

        # Now that we know the file has been fully saved to disk
        # move it into place.
        os.rename(temp_file_path, file_path)

        resp.status = falcon.HTTP_201

Answer 1

我不得不学习 cgi

cgi - File upload

cgi - Big file upload

这是我使用的实现:

def on_post(self, req, resp):
        """
        POST METHOD
        """
        # Retrieve input_file
        input_file = req.get_param('file')

        # Test if the file was uploaded
        if input_file.filename:
            # Retrieve filename
            filename = input_file.filename

            # Define file_path
            file_path = os.path.join(self._storage_path, filename)

            # Write to a temporary file to prevent incomplete files
            # from being used.
            temp_file_path = file_path + '~'

            open(temp_file_path, 'wb').write(input_file.file.read())

            # Now that we know the file has been fully saved to disk
            # move it into place.
            os.rename(temp_file_path, file_path)

    resp.status = falcon.HTTP_201