onasty/internal/transport/http/apiv1/middleware.go(view raw)
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package apiv1
import (
"context"
"errors"
"strings"
"github.com/gin-gonic/gin"
"github.com/gofrs/uuid/v5"
"github.com/olexsmir/onasty/internal/service/usersrv"
)
var ErrUnauthorized = errors.New("unauthorized")
const userIDCtxKey = "userID"
func (a *APIV1) authorizedMiddleware(c *gin.Context) {
token, ok := getTokenFromAuthHeaders(c)
if !ok {
errorResponse(c, ErrUnauthorized)
return
}
ok, err := checkIfUserIsReal(c.Request.Context(), token, a.usersrv)
if err != nil {
errorResponse(c, err)
return
}
if !ok {
errorResponse(c, ErrUnauthorized)
return
}
if err := saveUserIDToCtx(c, a.usersrv, token); err != nil {
errorResponse(c, err)
return
}
c.Next()
}
func (a *APIV1) couldBeAuthorizedMiddleware(c *gin.Context) {
token, ok := getTokenFromAuthHeaders(c)
if ok {
ok, err := checkIfUserIsReal(c.Request.Context(), token, a.usersrv)
if err != nil {
errorResponse(c, err)
return
}
if !ok {
errorResponse(c, ErrUnauthorized)
return
}
if err := saveUserIDToCtx(c, a.usersrv, token); err != nil {
newInternalError(c, err)
return
}
}
c.Next()
}
//nolint:unused // TODO: remove me later
func (a *APIV1) isUserAuthorized(c *gin.Context) bool {
return !a.getUserID(c).IsNil()
}
func getTokenFromAuthHeaders(c *gin.Context) (token string, ok bool) { //nolint:nonamedreturns
header := c.GetHeader("Authorization")
if header == "" {
return "", false
}
headerParts := strings.Split(header, " ")
if len(headerParts) != 2 && headerParts[0] != "Bearer" {
return "", false
}
if len(headerParts[1]) == 0 {
return "", false
}
return headerParts[1], true
}
func saveUserIDToCtx(c *gin.Context, us usersrv.UserServicer, token string) error {
pl, err := us.ParseToken(token)
if err != nil {
return err
}
c.Set(userIDCtxKey, pl.UserID)
return nil
}
// getUserId returns userId from the context
// getting user id is only possible if user is authorized
func (a *APIV1) getUserID(c *gin.Context) uuid.UUID {
userID, exists := c.Get(userIDCtxKey)
if !exists {
return uuid.Nil
}
return uuid.Must(uuid.FromString(userID.(string)))
}
func checkIfUserIsReal(
ctx context.Context,
accessToken string,
us usersrv.UserServicer,
) (bool, error) {
parsedToken, err := us.ParseToken(accessToken)
if err != nil {
return false, err
}
return us.CheckIfUserExists(
ctx,
uuid.Must(uuid.FromString(parsedToken.UserID)),
)
}
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