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Photoblog 1: auth from authcookie exercise

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Meutel 2017-07-29 11:22:34 +02:00
parent 3df5ff763d
commit f20e3d6aed
7 changed files with 124 additions and 0 deletions
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1
.gitignore vendored
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@ -63,3 +63,4 @@ webcounter/webcounter
authcookie/authcookie authcookie/authcookie
cert.pem cert.pem
key.pem key.pem
photoblog/photoblog

52
photoblog/admin/admin.go Normal file
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@ -0,0 +1,52 @@
package admin
import (
"html/template"
"net/http"
"github.com/gorilla/sessions"
)
type AuthCookie struct {
Templates *template.Template
Store *sessions.CookieStore
}
func (app *AuthCookie) LoginPage(res http.ResponseWriter, req *http.Request) {
formErr := make(map[string]string)
switch req.Method {
case "POST":
username := req.FormValue("username")
if username == "" {
formErr["username"] = "Empty username"
}
password := req.FormValue("password")
if password == "" {
formErr["password"] = "Empty password"
}
if len(formErr) == 0 {
app.SaveUsername(username, res, req)
RedirectHome(res, req)
return
}
fallthrough
case "GET":
app.Templates.ExecuteTemplate(res, "login.html", formErr)
}
}
func (app *AuthCookie) LogoutPage(res http.ResponseWriter, req *http.Request) {
app.SaveUsername("", res, req)
RedirectHome(res, req)
}
func (app *AuthCookie) CurrentSession(res http.ResponseWriter, req *http.Request) *sessions.Session {
session, _ := app.Store.Get(req, "session")
return session
}
func (app *AuthCookie) SaveUsername(username string, res http.ResponseWriter, req *http.Request) {
session := app.CurrentSession(res, req)
session.Values["username"] = username
session.Save(req, res)
}
func RedirectHome(res http.ResponseWriter, req *http.Request) {
http.Redirect(res, req, "/", http.StatusSeeOther)
}

39
photoblog/main.go Normal file
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@ -0,0 +1,39 @@
package main
import (
"html/template"
"log"
"net/http"
"meutel.net/meutel/go-examples/photoblog/admin"
"github.com/gorilla/sessions"
)
type PhotoBlog struct {
*admin.AuthCookie
Templates *template.Template
}
func (app *PhotoBlog) HomePage(res http.ResponseWriter, req *http.Request) {
app.Templates.ExecuteTemplate(res, "home.html", app.CurrentSession(res, req).Values)
}
func main() {
tpl, err := template.ParseGlob("templates/*.html")
if err != nil {
log.Fatalln(err)
}
admin := admin.AuthCookie{
Templates: tpl,
Store: sessions.NewCookieStore([]byte("flQ6QzM/c3Jtdl9ycDx6OXRIfFgK")),
}
app := PhotoBlog{
AuthCookie: &admin,
Templates: tpl,
}
http.HandleFunc("/", app.HomePage)
http.HandleFunc("/login", app.LoginPage)
http.HandleFunc("/logout", app.LogoutPage)
http.ListenAndServeTLS(":9443", "../cert.pem", "../key.pem", nil)
}

2
photoblog/templates/footer.html Normal file
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@ -0,0 +1,2 @@
</body>
</html>

4
photoblog/templates/header.html Normal file
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@ -0,0 +1,4 @@
<!DOCTYPE html>
<html>
<head><title>Auth cookie</title></head>
<body>

10
photoblog/templates/home.html Normal file
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@ -0,0 +1,10 @@
{{ template "header.html" }}
<div>
{{ if .username }}
<a href="/logout">Logout</a>
{{ else }}
<a href="/login">Login</a>
{{ end }}
</div>
<h1>Hello {{ .username }}</h1>
{{ template "footer.html" }}

16
photoblog/templates/login.html Normal file
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@ -0,0 +1,16 @@
{{ template "header.html" }}
<h1>Authentification</h1>
<form action="/login" method="POST">
<label>
Username: {{ if .username }}<b>{{ .username }}</b>{{ end }}
<input type="text" name="username">
</label>
<br>
<label>
Password: {{ if .password }}<b>{{ .password }}</b>{{ end }}
<input type="password" name="password">
</label>
<br>
<input type="submit">
</form>
{{ template "footer.html" }}