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require_auth.go
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require_auth.go
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package middlewares
import (
"errors"
"net/http"
"strings"
"github.com/gin-gonic/gin"
"github.com/golang-jwt/jwt"
"github.com/quangvu30/order-go/config"
"github.com/quangvu30/order-go/types"
)
type UserPayload struct {
Email string `json:"email"`
}
type AuthMiddleware struct {
Config *config.Config
}
func NewAuthMiddleware(c *config.Config) *AuthMiddleware {
return &AuthMiddleware{
Config: c,
}
}
func (a *AuthMiddleware) User() gin.HandlerFunc {
return func(c *gin.Context) {
jwtToken, err := extractBearerToken(c.GetHeader("Authorization"))
if err != nil {
c.AbortWithStatusJSON(http.StatusBadRequest, types.UnsignedResponse{
Msg: err.Error(),
})
return
}
token, err := parseToken(jwtToken, a.Config.JwtSecret)
if err != nil {
c.AbortWithStatusJSON(http.StatusBadRequest, types.UnsignedResponse{
Msg: "bad jwt token",
})
return
}
claims, OK := token.Claims.(jwt.MapClaims)
if !OK {
c.AbortWithStatusJSON(http.StatusInternalServerError, types.UnsignedResponse{
Msg: "unable to parse claims",
})
return
}
c.Set("user", UserPayload{
Email: claims["email"].(string),
})
c.Next()
}
}
func parseToken(jwtToken string, secKey string) (*jwt.Token, error) {
token, err := jwt.Parse(jwtToken, func(token *jwt.Token) (interface{}, error) {
if _, OK := token.Method.(*jwt.SigningMethodHMAC); !OK {
return nil, errors.New("bad signed method received")
}
return []byte(secKey), nil
})
if err != nil {
return nil, errors.New("bad jwt token")
}
return token, nil
}
func extractBearerToken(header string) (string, error) {
if header == "" {
return "", errors.New("bad header value given")
}
jwtToken := strings.Split(header, " ")
if len(jwtToken) != 2 {
return "", errors.New("incorrectly formatted authorization header")
}
return jwtToken[1], nil
}