I\'ve made simple nodejs application by using nodejs+express. Now I want to make user authentification. I want to realize session handling by using mongoose. Can you advise
Just use mongoose-auth by Brian Noguchi https://github.com/bnoguchi/mongoose-auth
It's a drop in solution for your question, it's well documented and extensible.
EDIT
mongoose-auth is no longer maintained. If you need to make it work with more recent versions of mongoose (ie > v3.x.x) and express (ie. > v3.x.x), here's an excerpt from a package.json file I'm currently using in production (It's hacky but it works):
"everyauth": "https://github.com/bnoguchi/everyauth/tarball/express3",
"mongoose-3x-types": "~1.0.5",
"mongoose-auth": "https://github.com/cbou/mongoose-auth/tarball/everymodule-fix",
I you are starting a new project don't use mongoose-auth, instead try out passport. It offers the same functionality, it's very flexible, however it has a different api. It's part of the locomotive MVC framework and as such it's actively maintained.