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auth.go
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auth.go
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package routes
import (
"errors"
"fmt"
"github.com/blizztrack/owmods/core/goth/battlenet"
"github.com/kataras/iris"
"github.com/markbates/goth"
"github.com/blizztrack/owmods/database"
"github.com/blizztrack/owmods/system"
"gopkg.in/alecthomas/kingpin.v2"
)
type authRoutes struct{}
var (
clientID = kingpin.Flag("client_id", "Battle.net Client ID").Envar("CLIENT_ID").Default("").String()
clientSecret = kingpin.Flag("client_secret", "Battle.net Client Secret").Envar("CLIENT_SECRET").Default("").String()
hostServer = kingpin.Flag("client_host_server", "Battle.net Client Host Server").Envar("CLIENT_HOST").Default("http://127.0.0.1:1337").String()
)
const oauth = "battlenet"
func NewAuthRoutes(party iris.Party) {
a := authRoutes{}
party.Get("/start", a.authStart)
party.Get("/callback", a.authCallBack)
party.Get("/leave", a.authLogout)
goth.UseProviders(
battlenet.New(*clientID, *clientSecret, fmt.Sprintf("%s/auth/callback", *hostServer)),
)
}
func (authRoutes) authStart(ctx iris.Context) {
if gothUser, err := completeUserAuth(ctx); err == nil {
user := database.UpsertUser(gothUser)
system.Session().Get(ctx).Set("User", user)
system.Session().Get(ctx).Set("UserID", user.ID.Hex())
ctx.Redirect("/")
} else {
beginAuthHandler(ctx)
}
}
func (authRoutes) authCallBack(ctx iris.Context) {
gothUser, err := completeUserAuth(ctx)
if err != nil {
ctx.StatusCode(iris.StatusInternalServerError)
ctx.Writef("%v", err)
return
}
user := database.UpsertUser(gothUser)
system.Session().Get(ctx).Set("User", user)
system.Session().Get(ctx).Set("UserID", user.ID.Hex())
ctx.Redirect("/")
}
func (authRoutes) authLogout(ctx iris.Context) {
sessionsManager := system.Session()
session := sessionsManager.Get(ctx)
session.Destroy()
ctx.Redirect("/")
}
func beginAuthHandler(ctx iris.Context) {
url, err := getAuthURL(ctx)
if err != nil {
ctx.StatusCode(iris.StatusBadRequest)
ctx.Writef("%v", err)
return
}
ctx.Redirect(url, iris.StatusTemporaryRedirect)
}
func getAuthURL(ctx iris.Context) (string, error) {
providerName := oauth
provider, err := goth.GetProvider(providerName)
if err != nil {
return "", err
}
sess, err := provider.BeginAuth(setState(ctx))
if err != nil {
return "", err
}
url, err := sess.GetAuthURL()
if err != nil {
return "", err
}
session := system.Session().Get(ctx)
session.Set(providerName, sess.Marshal())
return url, nil
}
var setState = func(ctx iris.Context) string {
state := ctx.URLParam("state")
if len(state) > 0 {
return state
}
return "state"
}
var getState = func(ctx iris.Context) string {
return ctx.URLParam("state")
}
var completeUserAuth = func(ctx iris.Context) (goth.User, error) {
providerName := oauth
sessionsManager := system.Session()
provider, err := goth.GetProvider(providerName)
if err != nil {
return goth.User{}, err
}
session := sessionsManager.Get(ctx)
value := session.GetString(providerName)
if value == "" {
return goth.User{}, errors.New("session value for " + providerName + " not found")
}
sess, err := provider.UnmarshalSession(value)
if err != nil {
return goth.User{}, err
}
user, err := provider.FetchUser(sess)
if err == nil {
// user can be found with existing session data
return user, err
}
// get new token and retry fetch
_, err = sess.Authorize(provider, ctx.Request().URL.Query())
if err != nil {
return goth.User{}, err
}
session.Set(providerName, sess.Marshal())
return provider.FetchUser(sess)
}