import os
import urllib
import wsgiref.handlers
from google.appengine.ext import webapp
from google.appengine.ext import blobstore
from google.appengine.ext.webapp import blobstore_handlers

class MainPage(blobstore_handlers.BlobstoreDownloadHandler):
	def get(self):
		blob_key = str(urllib.unquote(self.request.get('key')))
		if not blobstore.get(blob_key):
			self.error(404)
		else:
			if str(self.request.get('tp'))=='d':
				self.send_blob(blobstore.BlobInfo.get(blob_key), save_as=True)
			else:
				self.send_blob(blob_key)

def main():
	app = webapp.WSGIApplication([
		(r'.*', MainPage)], debug=True)
		
	wsgiref.handlers.CGIHandler().run(app)

if __name__ == '__main__':
	main()