ゴリラ セッション Web ツールキットを使用している間、セッション変数はリクエスト間で維持されません。サーバーを起動して localhost:8100/ と入力すると、セッション値が存在しないため、ページが login.html にリダイレクトされます。ログイン後、ストアにセッション変数を設定すると、ページが home.html にリダイレクトされます。しかし、新しいタブを開いて localhost:8100/ と入力すると、既に保存されているセッション変数を使用してページを home.html にリダイレクトする必要がありますが、ページは代わりに login.html にリダイレクトされます。以下はコードです。
package main
import (
"crypto/md5"
"encoding/hex"
"fmt"
"github.com/gocql/gocql"
"github.com/gorilla/mux"
"github.com/gorilla/sessions"
"net/http"
"time"
)
var store = sessions.NewCookieStore([]byte("something-very-secret"))
var router = mux.NewRouter()
func init() {
store.Options = &sessions.Options{
Domain: "localhost",
Path: "/",
MaxAge: 3600 * 1, // 1 hour
HttpOnly: true,
}
}
func main() {
//session handling
router.HandleFunc("/", SessionHandler)
router.HandleFunc("/signIn", SignInHandler)
router.HandleFunc("/signUp", SignUpHandler)
router.HandleFunc("/logOut", LogOutHandler)
http.Handle("/", router)
http.ListenAndServe(":8100", nil)
}
//handler for signIn
func SignInHandler(res http.ResponseWriter, req *http.Request) {
email := req.FormValue("email")
password := req.FormValue("password")
//Generate hash of password
hasher := md5.New()
hasher.Write([]byte(password))
encrypted_password := hex.EncodeToString(hasher.Sum(nil))
//cassandra connection
cluster := gocql.NewCluster("localhost")
cluster.Keyspace = "gbuy"
cluster.DefaultPort = 9042
cluster.Consistency = gocql.Quorum
session, _ := cluster.CreateSession()
defer session.Close()
//select query
var firstname string
stmt := "SELECT firstname FROM USER WHERE email= '" + email + "' and password ='" + encrypted_password + "';"
err := session.Query(stmt).Scan(&firstname)
if err != nil {
fmt.Fprintf(res, "failed")
} else {
if firstname == "" {
fmt.Fprintf(res, "failed")
} else {
fmt.Fprintf(res, firstname)
}
}
//store in session variable
sessionNew, _ := store.Get(req, "loginSession")
// Set some session values.
sessionNew.Values["email"] = email
sessionNew.Values["name"] = firstname
// Save it.
sessionNew.Save(req, res)
//store.Save(req,res,sessionNew)
fmt.Println("Session after logging:")
fmt.Println(sessionNew)
}
//handler for signUp
func SignUpHandler(res http.ResponseWriter, req *http.Request) {
fName := req.FormValue("fName")
lName := req.FormValue("lName")
email := req.FormValue("email")
password := req.FormValue("passwd")
birthdate := req.FormValue("date")
city := req.FormValue("city")
gender := req.FormValue("gender")
//Get current timestamp and format it.
sysdate := time.Now().Format("2006-01-02 15:04:05-0700")
//Generate hash of password
hasher := md5.New()
hasher.Write([]byte(password))
encrypted_password := hex.EncodeToString(hasher.Sum(nil))
//cassandra connection
cluster := gocql.NewCluster("localhost")
cluster.Keyspace = "gbuy"
cluster.DefaultPort = 9042
cluster.Consistency = gocql.Quorum
session, _ := cluster.CreateSession()
defer session.Close()
//Insert the data into the Table
stmt := "INSERT INTO USER (email,firstname,lastname,birthdate,city,gender,password,creation_date) VALUES ('" + email + "','" + fName + "','" + lName + "','" + birthdate + "','" + city + "','" + gender + "','" + encrypted_password + "','" + sysdate + "');"
fmt.Println(stmt)
err := session.Query(stmt).Exec()
if err != nil {
fmt.Fprintf(res, "failed")
} else {
fmt.Fprintf(res, fName)
}
}
//handler for logOut
func LogOutHandler(res http.ResponseWriter, req *http.Request) {
sessionOld, err := store.Get(req, "loginSession")
fmt.Println("Session in logout")
fmt.Println(sessionOld)
if err = sessionOld.Save(req, res); err != nil {
fmt.Println("Error saving session: %v", err)
}
}
//handler for Session
func SessionHandler(res http.ResponseWriter, req *http.Request) {
router.PathPrefix("/").Handler(http.FileServer(http.Dir("../static/")))
session, _ := store.Get(req, "loginSession")
fmt.Println("Session in SessionHandler")
fmt.Println(session)
if val, ok := session.Values["email"].(string); ok {
// if val is a string
switch val {
case "": {
http.Redirect(res, req, "html/login.html", http.StatusFound) }
default:
http.Redirect(res, req, "html/home.html", http.StatusFound)
}
} else {
// if val is not a string type
http.Redirect(res, req, "html/login.html", http.StatusFound)
}
}
誰かが私が間違っていることを教えてもらえますか? 前もって感謝します。