1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
/*
* Copyright (C) 2024 Jonni Liljamo <jonni@liljamo.com>
*
* This file is licensed under AGPL-3.0-or-later, see NOTICE and LICENSE for
* more information.
*/
package middlewares
import (
"net/http"
"github.com/alexedwards/scs/v2"
"github.com/gin-gonic/gin"
)
// SessionExists returns a gin middleware for checking if a session exists.
func SessionExists(sm *scs.SessionManager) gin.HandlerFunc {
return func(c *gin.Context) {
userID := sm.Get(c.Request.Context(), "user_id")
if userID != nil {
if c.Request.URL.Path == "/login" {
c.Redirect(http.StatusTemporaryRedirect, "/manage")
c.Abort()
} else {
// Set user_id in context, if needed later (e.g. AdminOnly middleware)
c.Set("user_id", userID)
// TODO: Validate in db?
c.Next()
}
} else {
if c.Request.URL.Path == "/login" {
c.Next()
} else {
c.Redirect(http.StatusTemporaryRedirect, "/login")
c.Abort()
}
}
}
}