Question

我是谷歌应用引擎的新手，我想将其用作服务器，以便人们下载文件。我已经阅读了python中的教程。我没有找到任何实际指导我如何将文件上传到服务器的目的。

Answer 1

Blobstore tutorial为这个用例提供了一个示例。该链接提供了以下代码：一个允许用户上传文件然后立即下载文件的应用程序：

#!/usr/bin/env python
#

import os
import urllib

from google.appengine.ext import blobstore
from google.appengine.ext import webapp
from google.appengine.ext.webapp import blobstore_handlers
from google.appengine.ext.webapp import template
from google.appengine.ext.webapp.util import run_wsgi_app

class MainHandler(webapp.RequestHandler):
    def get(self):
        upload_url = blobstore.create_upload_url('/upload')
        self.response.out.write('<html><body>')
        self.response.out.write('<form action="%s" method="POST" enctype="multipart/form-data">' % upload_url)
        self.response.out.write("""Upload File: <input type="file" name="file"><br> <input type="submit" 
            name="submit" value="Submit"> </form></body></html>""")

class UploadHandler(blobstore_handlers.BlobstoreUploadHandler):
    def post(self):
        upload_files = self.get_uploads('file')  # 'file' is file upload field in the form
        blob_info = upload_files[0]
        self.redirect('/serve/%s' % blob_info.key())

class ServeHandler(blobstore_handlers.BlobstoreDownloadHandler):
    def get(self, resource):
        resource = str(urllib.unquote(resource))
        blob_info = blobstore.BlobInfo.get(resource)
        self.send_blob(blob_info)

def main():
    application = webapp.WSGIApplication(
          [('/', MainHandler),
           ('/upload', UploadHandler),
           ('/serve/([^/]+)?', ServeHandler),
          ], debug=True)
    run_wsgi_app(application)

if __name__ == '__main__':
  main()

Answer 2

您还可以在Nick Johnson的博客中查看具有良好界面的very good GAE/python app，并根据需要启用多次上传。我已经采用该代码来构建我需要类似文件系统的应用程序，并且管理blob解决了这个问题。

在Google App Engine中上传文件并将其下载

2 个答案: