Does Google App Engine support ftp?

Question

Now I use my own Java FTP program to ftp objects from my PC to my ISP\'s website server.

I want to use Google App Engine\'s servlet to get Paypal IPN messages, then

Answer 1

As of April 9 this year (SDK 1.7.7) this isn't a problem any longer. Outbound sockets (e.g. FTP) are generally available to all billing-enabled apps.

Socket API Overview (Java): https://developers.google.com/appengine/docs/java/sockets/