/
auth_middleware.go
73 lines (58 loc) · 1.83 KB
/
auth_middleware.go
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package middlewares
import (
"context"
"net/http"
"github.com/dfaw20/backend-ai-plot/models"
"github.com/gin-gonic/gin"
"golang.org/x/oauth2"
"github.com/jinzhu/gorm"
v2 "google.golang.org/api/oauth2/v2"
"google.golang.org/api/option"
"github.com/dfaw20/backend-ai-plot/repositories"
)
func AuthMiddleware(db *gorm.DB, oauth2Config oauth2.Config) gin.HandlerFunc {
return func(c *gin.Context) {
// リクエストヘッダーからAuthorizationヘッダーを取得
authHeader := c.GetHeader("Authorization")
if authHeader == "" {
c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
c.Abort()
return
}
// "Bearer " のプレフィックスを取り除いてアクセストークンを取得
accessToken := authHeader[len("Bearer "):]
isValid, user, _ := isValidAccessToken(db, accessToken, oauth2Config)
if isValid {
c.Set("auth_user", user)
} else {
c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid access token"})
c.Abort()
return
}
}
}
func isValidAccessToken(db *gorm.DB, accessToken string, oauth2Config oauth2.Config) (bool, models.User, error) {
userTokenRepository := repositories.NewUserTokenRepository(db)
token, err := userTokenRepository.FindByAccessToken(accessToken)
if err != nil {
return false, models.User{}, err
}
cxt := context.Background()
oauth2Service, err := v2.NewService(cxt, option.WithTokenSource(oauth2Config.TokenSource(cxt, &token)))
if err != nil {
return false, models.User{}, err
}
userInfo, err := oauth2Service.Userinfo.V2.Me.Get().Do()
if err != nil {
return false, models.User{}, err
}
userRepository := repositories.NewUserRepository(db)
user, err := userRepository.FindByUserInfo(*userInfo)
if err != nil {
return false, models.User{}, err
}
if user.ID == 0 {
return false, models.User{}, err
}
return true, user, nil
}