forked from tonyalaribe/kaku-go
/
auth.go
225 lines (170 loc) · 5.1 KB
/
auth.go
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package main
import (
"fmt"
"log"
"net/http"
"strconv"
"strings"
"time"
"github.com/antonholmquist/jason"
"github.com/dgrijalva/jwt-go"
)
//AccessToken is where the facebook authentication data would be stored
type AccessToken struct {
Token string
Expiry int64
}
//Handlers
func (c *appContext) logout(w http.ResponseWriter, r *http.Request) {
http.SetCookie(w, &http.Cookie{
Name: c.token,
Value: "deleted",
Path: "/",
RawExpires: "0",
//Expires: time.Now().AddDate(0, -1, 0),
})
http.Redirect(w, r, "/", http.StatusFound)
}
func (c *appContext) offlineLogin(w http.ResponseWriter, r *http.Request) {
log.Println("Offline Login")
u := User{
Name: "Anthony Alaribe",
PID: "1234567890",
Email: "anthonyalaribe@gmail.com",
Image: "http://placehold.it/100x100",
}
user, err := c.Authenticate(&u, "facebook")
if err != nil {
log.Println(err)
}
log.Println(user)
// create a signer for rsa 256
t := jwt.New(jwt.GetSigningMethod("RS256"))
// set our claims
t.Claims["AccessToken"] = user.Permission
t.Claims["User"] = user
// set the expire time
// see http://tools.ietf.org/html/draft-ietf-oauth-json-web-token-20#section-4.1.4
t.Claims["exp"] = time.Now().Add(time.Minute * 10).Unix()
tokenString, err := t.SignedString(c.signKey)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
fmt.Fprintln(w, "Sorry, error while Signing Token!")
log.Printf("Token Signing error: %v\n", err)
return
}
log.Println(c.token)
log.Println(tokenString)
// i know using cookies to store the token isn't really helpfull for cross domain api usage
// but it's just an example and i did not want to involve javascript
http.SetCookie(w, &http.Cookie{
Name: c.token,
Value: tokenString,
Path: "/",
RawExpires: "0",
})
http.Redirect(w, r, "/", http.StatusFound)
}
func (c *appContext) FBLogin(w http.ResponseWriter, r *http.Request) {
// grab the code fragment
code := r.FormValue("code")
RedirectURL := c.domain + "/FBLogin"
accessToken := GetAccessToken(c.fbclientid, code, c.fbsecret, RedirectURL)
response, err := http.Get("https://graph.facebook.com/me?access_token=" + accessToken.Token)
// handle err. You need to change this into something more robust
// such as redirect back to home page with error message
if err != nil {
w.Write([]byte(err.Error()))
}
str := readHTTPBody(response)
log.Println(str)
us, err := jason.NewObjectFromBytes([]byte(str))
if err != nil {
log.Println(err)
}
id, err := us.GetString("id")
if err != nil {
log.Println(err)
}
email, err := us.GetString("email")
if err != nil {
log.Println(err)
}
name, err := us.GetString("name")
if err != nil {
log.Println(err)
}
img := "https://graph.facebook.com/" + id + "/picture?width=180&height=180"
log.Println("It got this far; the ID is")
log.Println(id)
u := User{
Name: name,
PID: id,
Email: email,
Image: img,
}
user, err := c.Authenticate(&u, "facebook")
log.Println(user)
if err != nil {
log.Println(err)
}
// create a signer for rsa 256
t := jwt.New(jwt.GetSigningMethod("RS256"))
// set our claims
t.Claims["AccessToken"] = user.Permission
t.Claims["User"] = user
// set the expire time
// see http://tools.ietf.org/html/draft-ietf-oauth-json-web-token-20#section-4.1.4
t.Claims["exp"] = time.Now().Add(time.Hour * 99999).Unix()
tokenString, err := t.SignedString(c.signKey)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
fmt.Fprintln(w, "Sorry, error while Signing Token!")
log.Printf("Token Signing error: %v\n", err)
return
}
// i know using cookies to store the token isn't really helpfull for cross domain api usage
// but it's just an example and i did not want to involve javascript
http.SetCookie(w, &http.Cookie{
Name: c.token,
Value: tokenString,
Path: "/",
RawExpires: "0",
})
http.Redirect(w, r, "/", http.StatusFound)
}
func readHTTPBody(response *http.Response) string {
log.Println("Reading body")
bodyBuffer := make([]byte, 5000)
var str string
count, err := response.Body.Read(bodyBuffer)
for ; count > 0; count, err = response.Body.Read(bodyBuffer) {
if err != nil {
}
str += string(bodyBuffer[:count])
}
return str
}
// GetAccessToken Converts a code to an Auth_Token
func GetAccessToken(clientID string, code string, secret string, callbackURI string) AccessToken {
log.Println("GetAccessToken")
//https://graph.facebook.com/oauth/access_token?client_id=YOUR_APP_ID&redirect_uri=YOUR_REDIRECT_URI&client_secret=YOUR_APP_SECRET&code=CODE_GENERATED_BY_FACEBOOK
response, err := http.Get("https://graph.facebook.com/oauth/access_token?client_id=" +
clientID + "&redirect_uri=" + callbackURI +
"&client_secret=" + secret + "&code=" + code)
if err == nil {
auth := readHTTPBody(response)
log.Println(auth)
var token AccessToken
tokenArr := strings.Split(auth, "&")
log.Println(tokenArr)
token.Token = strings.Split(tokenArr[0], "=")[1]
expireInt, err := strconv.Atoi(strings.Split(tokenArr[1], "=")[1])
if err == nil {
token.Expiry = int64(expireInt)
}
return token
}
var token AccessToken
return token
}