I don't think you can override constants (DEFINE creates a constant)

Of course. I have kept SimplePie coding style. Maybe there is a better thing to override it

I mean, how am I supposed to set the host and port?

@Raydiation how can owncloud interact with this library ? I can change the constats to variables but i need to think about a variable

Create a method on the class in the same file

Here's where we use simplepie https://github.com/owncloud/news/blob/master/fetcher/feedfetcher.php#L82

In case you're wondering what getCore is, its a factory that allows us to mock and test the simple pie config without using the lib, see https://github.com/owncloud/appframework/blob/master/utility/simplepieapifactory.php#L51

All in all you dont want config options as constants, you want people to set them based on the news config for instance.

I see,it seems very simple.
What do you think about adding proxy arguments to object SimplePie_File ?

Yes, the file class should get the proxy argument. But it should also be possible to set it in the main class, I think this is the line where the main class calls the file class

https://github.com/simplepie/simplepie/blob/master/library/SimplePie.php#L1464

Please look at #359