/
firebase.go
61 lines (50 loc) · 1.46 KB
/
firebase.go
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
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
package middleware
import (
"errors"
"net/http"
"strings"
"github.com/david-torres/go-webapp-vuejs-firebase-quickstart/services"
"github.com/labstack/echo"
"github.com/labstack/echo/middleware"
)
// FirebaseAuthMiddleware contains methods pertaining to firebase authentication
type FirebaseAuthMiddleware struct {
Skipper middleware.Skipper
firebase *services.FirebaseService
}
// NewFirebaseAuthMiddleware creates an instance of FirebaseAuthMiddleware
func NewFirebaseAuthMiddleware(firebase *services.FirebaseService) *FirebaseAuthMiddleware {
return &FirebaseAuthMiddleware{firebase: firebase, Skipper: firebaseAuthSkipper}
}
// Verify is the middleware function, validates a Firebase id token
func (f *FirebaseAuthMiddleware) Verify(next echo.HandlerFunc) echo.HandlerFunc {
return func(c echo.Context) error {
if f.Skipper(c) {
return next(c)
}
r := c.Request()
token := token(r)
if token == "" {
err := errors.New("Invalid token")
return err
}
authToken, err := f.firebase.Verify(token)
if err != nil {
err := errors.New("Invalid token")
return err
}
// set UID for controllers
c.Set("UID", authToken.UID)
return next(c)
}
}
// add conditions to skip middleware here
func firebaseAuthSkipper(c echo.Context) bool {
return false
}
// fetch the token from the header
func token(r *http.Request) string {
authHeader := r.Header.Get(echo.HeaderAuthorization)
token := strings.Replace(authHeader, "Bearer ", "", 1)
return token
}