英文:
How can I set template variables from my middleware or session variable?
问题
我好的，下面是翻译好的内容：
我很好奇如何从我的中间件中设置一个模板变量，这是我的中间件代码：
func IsUserLoggedIn(router http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
log.Println("Checking if user is logged in")
session, err := store.Get(r, "loggedIn")
if err != nil {
http.Error(w, err.Error(), 500)
return
}
// 执行一些条件语句并设置为True/False
// 设置会话变量
session.Values["isLoggedIn"] = true
// 保存会话
session.Save(r, w)
// 设置模板变量
router.ServeHTTP(w, r)
})
}
然后在我的主要布局模板中：
{{ define "layout" }}
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="description" content="">
<meta name="keywords" content="">
<meta name="author" content="">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.4.0/css/font-awesome.min.css">
<link rel="stylesheet" href="/static/css/main.css">
<title> {{ .Title }} </title>
</head>
<body>
{{/* 在这里设置一个变量来表示您是否已登录 */}}
{{/* 获取会话变量并相应地设置 */}}
{{ template "body" .}}
</body>
</html>
{{ end }}
基本上，我如何在我的模板中访问会话变量？
英文:
I'm curious as to how I would set a template variable from a piece of middleware I have, this is my middleware:
func IsUserLoggedIn(router http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
log.Println("Checking if user is logged in")
session, err := store.Get(r, "loggedIn")
if err != nil {
http.Error(w, err.Error(), 500)
return
}
// Perform some If Statements and set True/False
// Set Session Variables
session.Values["isLoggedIn"] = true
// Save Session
session.Save(r, w)
// Set Template Variable
router.ServeHTTP(w, r)
})
}
Then in my template for my main layout:
{{ define "layout" }}
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="description" content="">
<meta name="keywords" content="">
<meta name="author" content="">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.4.0/css/font-awesome.min.css">
<link rel="stylesheet" href="/static/css/main.css">
<title> {{ .Title }} </title>
</head>
<body>
{{ SET SOMETHING HERE TO SAY YOU'RE LOGGED IN }}
{{ GET THE SESSION VARIABLE AND SET ACCORDINGLY }}
{{ template "body" .}}
</body>
</html>
{{ end }}
Basically how can I access a session variable inside my template?
答案1
得分: 2
我为个人网站做的事情是在模板中添加一个名为Session的辅助函数，并在这个函数中获取当前请求的会话，然后检查并返回请求的键。
类似这样的代码：
func render(w http.ResponseWriter, r *http.Request, name string, data interface{}) {
t, err := template.New(name).Funcs(template.FuncMap{
"Session": func(name string) interface{} {
return sessions.GetSession(r).Get(name)
},
}).ParseFiles(...)
}
你可以在这里查看完整版本：app/render.go
英文:
The thing I did for my personal website was to add a Session helper available in my templates, and in this helper retrieve the session of the current request then check and return the requested key.
Something like that:
func render(w http.ResponseWriter, r *http.Request, name string, data interface{}) {
t, err := template.New(name).Funcs(template.FuncMap{
"Session": func(name string) interface{} {
return sessions.GetSession(r).Get(name)
},
}).ParseFiles(...)
}
You can see the full version here: app/render.go
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