Question

I’m trying to pass parameter from python page to another through the URL,this parameter(key in my problem)is passed correctly but in the other page i have this code:

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.util import run_wsgi_app
import urllib
import urllib2        
class ServeHandler(blobstore_handlers.BlobstoreDownloadHandler):
    def get(self):

          blob_key = self.request.get('key')
          blob_key = str(urllib.unquote(blob_key))
          blob_info = blobstore.BlobInfo.get(blob_key)
          self.send_blob(blob_info)

def main():

     application = webapp.WSGIApplication(
    [('/',ServeHandler),], debug=True)
    run_wsgi_app(application)

if __name__ == '__main__':
    main()

but the problem that class ServeHandler(blobstore_handlers.BlobstoreDownloadHandler):didn’t execute ,when i ran this code, the output is

Status: 404 Not Found
Content-Type: text/html; charset=utf-8
Cache-Control: no-cache
Expires: Fri, 01 Jan 1990 00:00:00 GMT
Content-Length: 0

although the parameter is passed correctly;this is the url and the key(parameter):

http://localhost:8080/download.py?key=vzsX4xM1EtNak5RQVxj4BQ==

EDIT:
This is my app.yaml code:

application: myapplication
version: 1
runtime: python
api_version: 1

handlers:
- url: /compress.py
  script: compress.py
- url: /download.py
  script: download.py
- url: /decompress.py
  script: decompress.py
- url: (.*)/
  static_files: static\1/index.html
  upload: static/index.html

Please i want a solution for this problem ?any suggestions are welcome.

Answer 1

/download.py isn’t even in your app.yaml.
How would webapp find the correct script to run?

Concentrating for now on the download script, this is an example of how your app.yaml should look:

handlers:
- url: /.*
  script: download.py

---

Edit:
Alternatively, you can specify a more-specific regexp-pattern for the download URL:

def main():
    application = webapp.WSGIApplication([
            (r'/download.*', ServeHandler),
        ], debug=True)

And the URL would be something like:

http://localhost:8080/download?key=vzsX4xM1EtNak5RQVxj4BQ==