From 272c27c8f20b20889571ed640538c6564beb62ed Mon Sep 17 00:00:00 2001
From: skyblue <ssx205@gmail.com>
Date: Wed, 2 Apr 2014 08:14:56 +0800
Subject: [PATCH] add github social login, first step

---
 routers/user/user.go | 40 ++++++++++++++++++++++++++++++++++++++++
 web.go               | 13 +++++++++++++
 2 files changed, 53 insertions(+)

diff --git a/routers/user/user.go b/routers/user/user.go
index 08930e22..5890983b 100644
--- a/routers/user/user.go
+++ b/routers/user/user.go
@@ -5,11 +5,14 @@
 package user
 
 import (
+	"encoding/json"
 	"fmt"
 	"net/url"
 	"strings"
+	"code.google.com/p/goauth2/oauth"
 
 	"github.com/go-martini/martini"
+	"github.com/martini-contrib/oauth2"
 
 	"github.com/gogits/gogs/models"
 	"github.com/gogits/gogs/modules/auth"
@@ -74,6 +77,43 @@ func Profile(ctx *middleware.Context, params martini.Params) {
 	ctx.HTML(200, "user/profile")
 }
 
+// github && google && ...
+func SocialSignIn(tokens oauth2.Tokens) {
+	transport := &oauth.Transport{}
+	transport.Token = &oauth.Token{
+		AccessToken:  tokens.Access(),
+		RefreshToken: tokens.Refresh(),
+		Expiry:       tokens.ExpiryTime(),
+		Extra:        tokens.ExtraData(),
+	}
+
+	// Github API refer: https://developer.github.com/v3/users/
+	// FIXME: need to judge url
+	type GithubUser struct {
+		Id    int    `json:"id"`
+		Name  string `json:"login"`
+		Email string `json:"email"`
+	}
+
+	// Make the request.
+	scope := "https://api.github.com/user"
+	r, err := transport.Client().Get(scope)
+	if err != nil {
+		log.Error("connect with github error: %s", err)
+		// FIXME: handle error page
+		return
+	}
+	defer r.Body.Close()
+
+	user := &GithubUser{}
+	err = json.NewDecoder(r.Body).Decode(user)
+	if err != nil {
+		log.Error("Get: %s", err)
+	}
+	log.Info("login: %s", user.Name)
+	// FIXME: login here, user email to check auth, if not registe, then generate a uniq username
+}
+
 func SignIn(ctx *middleware.Context, form auth.LogInForm) {
 	ctx.Data["Title"] = "Log In"
 
diff --git a/web.go b/web.go
index cdec9232..48d80b4f 100644
--- a/web.go
+++ b/web.go
@@ -11,6 +11,8 @@ import (
 
 	"github.com/codegangsta/cli"
 	"github.com/go-martini/martini"
+	"github.com/martini-contrib/oauth2"
+	"github.com/martini-contrib/sessions"
 
 	"github.com/gogits/binding"
 
@@ -58,6 +60,16 @@ func runWeb(*cli.Context) {
 	// Middlewares.
 	m.Use(middleware.Renderer(middleware.RenderOptions{Funcs: []template.FuncMap{base.TemplateFuncs}}))
 
+	scope := "https://api.github.com/user"
+	oauth2.PathCallback = "/oauth2callback"
+	m.Use(sessions.Sessions("my_session", sessions.NewCookieStore([]byte("secret123"))))
+	m.Use(oauth2.Github(&oauth2.Options{
+		ClientId:     "09383403ff2dc16daaa1",
+		ClientSecret: "5f6e7101d30b77952aab22b75eadae17551ea6b5",
+		RedirectURL:  base.AppUrl + oauth2.PathCallback,
+		Scopes:       []string{scope},
+	}))
+
 	m.Use(middleware.InitContext())
 
 	reqSignIn := middleware.Toggle(&middleware.ToggleOptions{SignInRequire: true})
@@ -80,6 +92,7 @@ func runWeb(*cli.Context) {
 	m.Get("/avatar/:hash", avt.ServeHTTP)
 
 	m.Group("/user", func(r martini.Router) {
+		r.Any("/login/github", user.SocialSignIn)
 		r.Any("/login", binding.BindIgnErr(auth.LogInForm{}), user.SignIn)
 		r.Any("/sign_up", binding.BindIgnErr(auth.RegisterForm{}), user.SignUp)
 	}, reqSignOut)