forked from apexskier/httpauth
/
server.go
228 lines (210 loc) · 7.26 KB
/
server.go
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package main
import (
"fmt"
"html/template"
"net/http"
"os"
"github.com/apexskier/httpauth"
"github.com/gorilla/mux"
"golang.org/x/crypto/bcrypt"
)
var (
backend httpauth.GobFileAuthBackend
aaa httpauth.Authorizer
roles map[string]httpauth.Role
port = 8009
backendfile = "auth.gob"
)
func main() {
var err error
// create the backend storage, remove when all done
os.Create(backendfile)
defer os.Remove(backendfile)
// create the backend
backend, err = httpauth.NewGobFileAuthBackend(backendfile)
if err != nil {
panic(err)
}
// create some default roles
roles = make(map[string]httpauth.Role)
roles["user"] = 30
roles["admin"] = 80
aaa, err = httpauth.NewAuthorizer(backend, []byte("cookie-encryption-key"), "user", roles)
// create a default user
hash, err := bcrypt.GenerateFromPassword([]byte("adminadmin"), 8)
if err != nil {
panic(err)
}
defaultUser := httpauth.UserData{Username: "admin", Email: "admin@localhost", Hash: hash, Role: "admin"}
err = backend.SaveUser(defaultUser)
if err != nil {
panic(err)
}
// set up routers and route handlers
r := mux.NewRouter()
r.HandleFunc("/login", getLogin).Methods("GET")
r.HandleFunc("/register", postRegister).Methods("POST")
r.HandleFunc("/login", postLogin).Methods("POST")
r.HandleFunc("/admin", handleAdmin).Methods("GET")
r.HandleFunc("/add_user", postAddUser).Methods("POST")
r.HandleFunc("/change", postChange).Methods("POST")
r.HandleFunc("/", handlePage).Methods("GET") // authorized page
r.HandleFunc("/logout", handleLogout)
http.Handle("/", r)
fmt.Printf("Server running on port %d\n", port)
http.ListenAndServe(fmt.Sprintf(":%d", port), nil)
}
func getLogin(rw http.ResponseWriter, req *http.Request) {
messages := aaa.Messages(rw, req)
fmt.Fprintf(rw, `
<html>
<head><title>Login</title></head>
<body>
<h1>Httpauth example</h1>
<h2>Entry Page</h2>
<p><b>Messages: %v</b></p>
<h3>Login</h3>
<form action="/login" method="post" id="login">
<input type="text" name="username" placeholder="username"><br>
<input type="password" name="password" placeholder="password"></br>
<button type="submit">Login</button>
</form>
<h3>Register</h3>
<form action="/register" method="post" id="register">
<input type="text" name="username" placeholder="username"><br>
<input type="password" name="password" placeholder="password"></br>
<input type="email" name="email" placeholder="email@example.com"></br>
<button type="submit">Register</button>
</form>
</body>
</html>
`, messages)
}
func postLogin(rw http.ResponseWriter, req *http.Request) {
username := req.PostFormValue("username")
password := req.PostFormValue("password")
if err := aaa.Login(rw, req, username, password, "/"); err != nil && err.Error() == "already authenticated" {
http.Redirect(rw, req, "/", http.StatusSeeOther)
} else if err != nil {
fmt.Println(err)
http.Redirect(rw, req, "/login", http.StatusSeeOther)
}
}
func postRegister(rw http.ResponseWriter, req *http.Request) {
var user httpauth.UserData
user.Username = req.PostFormValue("username")
user.Email = req.PostFormValue("email")
password := req.PostFormValue("password")
if err := aaa.Register(rw, req, user, password); err == nil {
postLogin(rw, req)
} else {
http.Redirect(rw, req, "/login", http.StatusSeeOther)
}
}
func postAddUser(rw http.ResponseWriter, req *http.Request) {
var user httpauth.UserData
user.Username = req.PostFormValue("username")
user.Email = req.PostFormValue("email")
password := req.PostFormValue("password")
user.Role = req.PostFormValue("role")
if err := aaa.Register(rw, req, user, password); err != nil {
// maybe something
}
http.Redirect(rw, req, "/admin", http.StatusSeeOther)
}
func postChange(rw http.ResponseWriter, req *http.Request) {
email := req.PostFormValue("new_email")
aaa.Update(rw, req, "", email)
http.Redirect(rw, req, "/", http.StatusSeeOther)
}
func handlePage(rw http.ResponseWriter, req *http.Request) {
if err := aaa.Authorize(rw, req, true); err != nil {
fmt.Println(err)
http.Redirect(rw, req, "/login", http.StatusSeeOther)
return
}
if user, err := aaa.CurrentUser(rw, req); err == nil {
type data struct {
User httpauth.UserData
}
d := data{User: user}
t, err := template.New("page").Parse(`
<html>
<head><title>Secret page</title></head>
<body>
<h1>Httpauth example<h1>
{{ with .User }}
<h2>Hello {{ .Username }}</h2>
<p>Your role is '{{ .Role }}'. Your email is {{ .Email }}.</p>
<p>{{ if .Role | eq "admin" }}<a href="/admin">Admin page</a> {{ end }}<a href="/logout">Logout</a></p>
{{ end }}
<form action="/change" method="post" id="change">
<h3>Change email</h3>
<p><input type="email" name="new_email" placeholder="new email"></p>
<button type="submit">Submit</button>
</form>
</body>
`)
if err != nil {
panic(err)
}
t.Execute(rw, d)
}
}
func handleAdmin(rw http.ResponseWriter, req *http.Request) {
if err := aaa.AuthorizeRole(rw, req, "admin", true); err != nil {
fmt.Println(err)
http.Redirect(rw, req, "/login", http.StatusSeeOther)
return
}
if user, err := aaa.CurrentUser(rw, req); err == nil {
type data struct {
User httpauth.UserData
Roles map[string]httpauth.Role
Users []httpauth.UserData
Msg []string
}
messages := aaa.Messages(rw, req)
users, err := backend.Users()
if err != nil {
panic(err)
}
d := data{User: user, Roles: roles, Users: users, Msg: messages}
t, err := template.New("admin").Parse(`
<html>
<head><title>Admin page</title></head>
<body>
<h1>Httpauth example<h1>
<h2>Admin Page</h2>
<p>{{.Msg}}</p>
{{ with .User }}<p>Hello {{ .Username }}, your role is '{{ .Role }}'. Your email is {{ .Email }}.</p>{{ end }}
<p><a href="/">Back</a> <a href="/logout">Logout</a></p>
<h3>Users</h3>
<ul>{{ range .Users }}<li>{{.Username}}</li>{{ end }}</ul>
<form action="/add_user" method="post" id="add_user">
<h3>Add user</h3>
<p><input type="text" name="username" placeholder="username"><br>
<input type="password" name="password" placeholder="password"><br>
<input type="email" name="email" placeholder="email"><br>
<select name="role">
<option value="">role<option>
{{ range $key, $val := .Roles }}<option value="{{$key}}">{{$key}} - {{$val}}</option>{{ end }}
</select></p>
<button type="submit">Submit</button>
</form>
</body>
`)
if err != nil {
panic(err)
}
t.Execute(rw, d)
}
}
func handleLogout(rw http.ResponseWriter, req *http.Request) {
if err := aaa.Logout(rw, req); err != nil {
fmt.Println(err)
// this shouldn't happen
return
}
http.Redirect(rw, req, "/", http.StatusSeeOther)
}