For my planned upcoming move to France, to somewhere other than Paris, I'm looking to find somewhere to live. Based on advice in a few of the other questions here, I'm thinking of finding a flat share / house share to start with. (The thinking being that I'll then have some other people to talk to, to practice French with, to find out what's happening in the city etc). I'm probably only after a few months in a shared house/flat though, while I work out what bits of the city I want to be in, get together a dossier to rent etc.
Looking online, I've found various companies that offer holiday-style lettings of single rooms, normally by the day or the week, but that isn't really what I'm interested in. I've found some general advice online, but that all seems to assume you're already in the city, which I'm not as I haven't moved yet.
So, assuming you know where in France you want to move to, somewhere that isn't Paris, and roughly when, how might I go about finding a shared house / flat, without being there (yet), if that's even possible?
(I can specialise this question to just the city of interest in France, if that's felt to be necessary for an appropriate answer, for not it's just "Not Paris")