// loginHandler redirects to Facebook OAuth2 authorization page.
func loginHandler(req *web.Request) {
m := web.NewValues(
"client_id", appID, // defined in settings.go
"scope", "read_stream",
"redirect_uri", req.URL.Scheme+"://"+req.URL.Host+"/callback")
req.Redirect("https://graph.facebook.com/oauth/authorize?"+m.FormEncodedString(), false)
}
// authCallbackHandler handles redirect from Facebook OAuth2 authorization page.
func authCallbackHandler(req *web.Request) {
code := req.Param.Get("code")
if code == "" {
// should display error_reason
req.Redirect("/", false)
return
}
f, err := getUrlEncodedForm("https://graph.facebook.com/oauth/access_token",
web.NewValues(
"client_id", appID, // defined in settings.go
"client_secret", appSecret, // defined in settings.go
"redirect_uri", req.URL.Scheme+"://"+req.URL.Host+"/callback",
"code", code))
if err != nil {
req.Error(web.StatusInternalServerError, err)
return
}
token := f.Get("access_token")
expires := f.Get("expires")
if expires == "" {
expires = "3600"
}
maxAge, err := strconv.Atoi(expires)
if err != nil {
maxAge = 3600
} else {
maxAge -= 30 // fudge
}
req.Redirect("/", false,
web.HeaderSetCookie, web.NewCookie("fbtok", token).
MaxAge(maxAge-30).String())
}
// home handles requests to the home page.
func homeHandler(req *web.Request) {
token, err := accessToken(req)
if err != nil {
loggedOutHandler(req)
return
}
feed, err := getJSON("https://graph.facebook.com/me/home", web.NewValues("access_token", token))
if err != nil {
req.Error(web.StatusInternalServerError, err,
web.HeaderSetCookie, web.NewCookie("fbtok", "").Delete().String())
return
}
homeTemplate.respond(req, web.StatusOK, feed)
}
method string
url string
param web.Values
base string
clientCredentials Credentials
credentials Credentials
sig string
}{
{
"GeT",
"hTtp://pHotos.example.net/photos",
web.NewValues(
"oauth_consumer_key", "dpf43f3p2l4k3l03",
"oauth_token", "nnch734d00sl2jdk",
"oauth_nonce", "kllo9940pd9333jh",
"oauth_timestamp", "1191242096",
"oauth_signature_method", "HMAC-SHA1",
"oauth_version", "1.0",
"size", "original",
"file", "vacation.jpg"),
"GET&http%3A%2F%2Fphotos.example.net%2Fphotos&file%3Dvacation.jpg%26oauth_consumer_key%3Ddpf43f3p2l4k3l03%26oauth_nonce%3Dkllo9940pd9333jh%26oauth_signature_method%3DHMAC-SHA1%26oauth_timestamp%3D1191242096%26oauth_token%3Dnnch734d00sl2jdk%26oauth_version%3D1.0%26size%3Doriginal",
Credentials{"dpf43f3p2l4k3l03", "kd94hf93k423kf44"},
Credentials{"kd94hf93k423kf44", "pfkkdhi9sl3r4s00"},
"tR3+Ty81lMeYAr/Fid0kMTYa/WM="},
{
"GET",
"http://PHOTOS.example.net:8001/Photos",
web.NewValues(
"oauth_consumer_key", "dpf43f3++p+#2l4k3l03",
"oauth_token", "nnch734d(0)0sl2jdk",
"oauth_nonce", "kllo~9940~pd9333jh",