What is the best approach to writing a super simple RSS parser in Google App Engine (Java)? I read few posts about Rome, but seems like Rome is not compatible with App Engine.
Am I better off writing my own library? Fewest lines of code is a requirement, as this is not the main function of the application.
If I were you, I wouldn't think of RSS parser but focus on Atom parser instead. Atom feeds are clearly defined by this RFC.
And you can access Atom version of any RSS Feed without any problem - that is the service (no login required) that Google Reader API gives you for free.
Parsing Atom Feeds would be trivial, just use XML parser of your choice.