log in as bob with chrome browser
user name is encrypted and stored in browser cookies
cookie is loaded and decrypted
open the same page with firefox browser, cookie is not found cause cookie is stored on chrome
//cmd - install session
C:\Users\bob\golang1>go get github.com/gorilla/sessions
package main
import (
"html/template"
"net/http"
"github.com/gorilla/mux"
"github.com/gorilla/sessions"
)
type car struct {
Color string
Mileage int
Model string
}
var templates *template.Template
var store = sessions.NewCookieStore([]byte("secret"))
var truck = car{
Color: "black",
Mileage: 12345,
Model: "F-150",
}
var sedan = car{
Color: "white",
Mileage: 321,
Model: "Corolla",
}
func indexGetHandler(w http.ResponseWriter, r *http.Request) {
templates.ExecuteTemplate(w, "index.html", []car{truck, sedan})
}
func loginGetHandler(w http.ResponseWriter, r *http.Request) {
templates.ExecuteTemplate(w, "login.html", nil)
}
func loginPostHandler(w http.ResponseWriter, r *http.Request) {
r.ParseForm()
username := r.PostForm.Get("username")
session, _ := store.Get(r, "session")
session.Values["username"] = username
session.Save(r, w)
}
func testGetHandler(w http.ResponseWriter, r *http.Request) {
session, _ := store.Get(r, "session")
untyped, ok := session.Values["username"]
if !ok {
return
}
cookie, ok := untyped.(string)
if !ok {
return
}
w.Write([]byte(cookie))
}
func main() {
templates = template.Must(template.ParseGlob("templates/*.html"))
r := mux.NewRouter()
r.HandleFunc("/", indexGetHandler).Methods("GET")
//r.HandleFunc("/", indexPostHandler).Methods("POST")
r.HandleFunc("/login", loginGetHandler).Methods("GET")
r.HandleFunc("/login", loginPostHandler).Methods("POST")
r.HandleFunc("/test", testGetHandler).Methods("GET")
fs := http.FileServer(http.Dir("./static/"))
r.PathPrefix("/static/").Handler(http.StripPrefix("/static/", fs))
http.Handle("/", r)
http.ListenAndServe(":8000", nil)
}
//login.html
<html>
<head>
<title>Login</title>
</head>
<body>
<form method="POST">
Username: <input name="username">
<div>
<button type="submit">Login</button>
</div>
</form>
</body>
</html>
reference:
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