/
auth.go
77 lines (65 loc) · 1.86 KB
/
auth.go
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package main
import (
"crypto/md5"
"fmt"
"io"
"log"
"net/http"
"strings"
"github.com/stretchr/gomniauth"
"github.com/stretchr/objx"
)
// loginhandler that handles 3rd party login process
// format: /auth/{action}/{provider}
func loginHandler(w http.ResponseWriter, r *http.Request) {
segs := strings.Split(r.URL.Path, "/")
action := segs[2]
provider := segs[3]
switch action {
case "login":
provider, err := gomniauth.Provider(provider)
if err != nil {
log.Fatalln("Error while getting provider:", provider, " : ", err)
}
loginUrl, err := provider.GetBeginAuthURL(nil, nil)
if err != nil {
log.Fatalln("Error while getting GetBeginAuthURL for", provider, " : ", err)
}
w.Header().Set("Location", loginUrl)
w.WriteHeader(http.StatusTemporaryRedirect)
case "callback":
provider, err := gomniauth.Provider(provider)
if err != nil {
log.Fatalln("Error while getting provider:", provider, " : ", err)
}
creds, err := provider.CompleteAuth(objx.MustFromURLQuery(r.URL.RawQuery))
if err != nil {
log.Fatalln("Error while completing auth for", provider, " : ", err)
}
user, err := provider.GetUser(creds)
if err != nil {
log.Fatalln("Error while getting user for", provider)
}
// User Id is a md5 of the name
m := md5.New()
io.WriteString(m, strings.ToLower(user.Email()))
userId := fmt.Sprintf("%x", m.Sum(nil))
// save some data
authCookieValue := objx.New(map[string]interface{}{
"userid": userId,
"name": user.Name(),
"avatar_url": user.AvatarURL(),
"email": user.Email(),
}).MustBase64()
http.SetCookie(w, &http.Cookie{
Name: "auth",
Value: authCookieValue,
Path: "/",
})
w.Header()["Location"] = []string{"/chat"}
w.WriteHeader(http.StatusTemporaryRedirect)
default:
w.WriteHeader(http.StatusNotFound)
fmt.Fprintf(w, "Auth action %s not supported", action)
}
}