Using Three20 with an another protocol than HTTP

I'm just starting to discover Three20, and would like to know i开发者_开发技巧n which direction to look for using Three20 with another protocol than HTTP. Three20 uses requests by URLs, and I would like to request files (for examples photos in TTImageView) using a different protocol (a home made one).

If you can just tell me if it's possible without hacking too much into Three20, that'll be nice

Thanks!

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The URL requests are fairly solidly baked in to the library, and they assume a connection over HTTP (though it doesn't technically have to be HTTP). I don't know of an easy inflection point for implementing your own protocol, though - I would mark this as significant work.