如何使用Python编写CMS系统的文件上传下载功能

from flask import Flask, request
from werkzeug.utils import secure_filename

app = Flask(__name__)

@app.route('/upload', methods=['POST'])
def upload_file():
    if 'file' not in request.files:
        return 'No file part'

    file = request.files['file']

    if file.filename == '':
        return 'No selected file'

    filename = secure_filename(file.filename)

    file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))

    return 'File uploaded successfully'

if __name__ == '__main__':
    app.run()

from flask import Flask, send_from_directory

app = Flask(__name__)

@app.route('/download/<path:filename>')
def download_file(filename):
    return send_from_directory(app.config['UPLOAD_FOLDER'], filename, as_attachment=True)

if __name__ == '__main__':
    app.run()

from django.shortcuts import render
from django.http import HttpResponse
from django.core.files.storage import FileSystemStorage

def upload_file(request):
    if request.method == 'POST' and request.FILES['file']:
        file = request.FILES['file']
        fs = FileSystemStorage()
        filename = fs.save(file.name, file)
        return HttpResponse('File uploaded successfully')

    return render(request, 'upload.html')

def download_file(request, filename):
    fs = FileSystemStorage()
    response = HttpResponse(fs.open(filename), content_type='application/octet-stream')
    response['Content-Disposition'] = 'attachment; filename="{0}"'.format(filename)
    return response