Awesome
negroni-oauth2
Allows your Negroni application to support user login via an OAuth 2.0 backend. Requires negroni-sessions
middleware.
Google, Facebook, LinkedIn and Github sign-in are currently supported.
Once endpoints are provided, this middleware can work with any OAuth 2.0 backend.
Usage
package main
import (
"fmt"
"net/http"
oauth2 "github.com/goincremental/negroni-oauth2"
sessions "github.com/goincremental/negroni-sessions"
"github.com/goincremental/negroni-sessions/cookiestore"
"github.com/urfave/negroni"
)
func main() {
secureMux := http.NewServeMux()
// Routes that require a logged in user
// can be protected by using a separate route handler
// If the user is not authenticated, they will be
// redirected to the login path.
secureMux.HandleFunc("/restrict", func(w http.ResponseWriter, req *http.Request) {
token := oauth2.GetToken(req)
fmt.Fprintf(w, "OK: %s", token.Access())
})
secure := negroni.New()
secure.Use(oauth2.LoginRequired())
secure.UseHandler(secureMux)
n := negroni.New()
n.Use(sessions.Sessions("my_session", cookiestore.New([]byte("secret123"))))
n.Use(oauth2.Google(&oauth2.Config{
ClientID: "client_id",
ClientSecret: "client_secret",
RedirectURL: "refresh_url",
Scopes: []string{"https://www.googleapis.com/auth/drive"},
}))
router := http.NewServeMux()
//routes added to mux do not require authentication
router.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
token := oauth2.GetToken(req)
if token == nil || !token.Valid() {
fmt.Fprintf(w, "not logged in, or the access token is expired")
return
}
fmt.Fprintf(w, "logged in")
return
})
//There is probably a nicer way to handle this than repeat the restricted routes again
//of course, you could use something like gorilla/mux and define prefix / regex etc.
router.Handle("/restrict", secure)
n.UseHandler(router)
n.Run(":3000")
}
Auth flow
/login
will redirect user to the OAuth 2.0 provider's permissions dialog. If there is anext
query param provided, user is redirected to the next page afterwards.- If user agrees to connect, OAuth 2.0 provider will redirect to
/oauth2callback
to let your app to make the handshake. You need to register/oauth2callback
as a Redirect URL in your application settings. /logout
will log the user out. If there is anext
query param provided, user is redirected to the next page afterwards.
You can customize the login, logout, oauth2callback and error paths:
oauth2.PathLogin = "/oauth2login"
oauth2.PathLogout = "/oauth2logout"
...