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|
package ext
import (
"context"
"encoding/base64"
"errors"
"net/http"
"time"
"golang.org/x/exp/slog"
"git.sr.ht/~gabrielgio/img/pkg/database/repository"
"git.sr.ht/~gabrielgio/img/pkg/service"
)
func HTML(next http.HandlerFunc) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/html")
next(w, r)
}
}
type (
User string
LogMiddleware struct {
logger *slog.Logger
}
)
const (
UserKey User = "user"
)
func NewLogMiddleare(log *slog.Logger) *LogMiddleware {
return &LogMiddleware{
logger: log,
}
}
func (l *LogMiddleware) HTTP(next http.HandlerFunc) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
start := time.Now()
next(w, r)
elapsed := time.Since(start)
l.logger.Info(
r.Method,
slog.Duration("elapsed", elapsed),
slog.String("path", r.URL.Path),
)
}
}
type AuthMiddleware struct {
key []byte
logger *slog.Logger
userRepository repository.UserRepository
}
func NewAuthMiddleware(
key []byte,
logger *slog.Logger,
userRepository repository.UserRepository,
) *AuthMiddleware {
return &AuthMiddleware{
key: key,
logger: logger,
userRepository: userRepository,
}
}
func (a *AuthMiddleware) LoggedIn(next http.HandlerFunc) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
path := r.URL.Path
if path == "/login" || path == "/initial" {
next(w, r)
return
}
redirectLogin := "/login?redirect=" + path
authBase64, err := r.Cookie("auth")
if errors.Is(err, http.ErrNoCookie) {
a.logger.Info("No auth provided")
http.Redirect(w, r, redirectLogin, http.StatusTemporaryRedirect)
return
}
auth, err := base64.StdEncoding.DecodeString(authBase64.Value)
if err != nil {
a.logger.Error(err.Error())
return
}
token, err := service.ReadToken(auth, a.key)
if err != nil {
a.logger.Error(err.Error())
http.Redirect(w, r, redirectLogin, http.StatusTemporaryRedirect)
return
}
user, err := a.userRepository.Get(r.Context(), token.UserID)
if err != nil {
a.logger.Error(err.Error())
return
}
r = r.WithContext(context.WithValue(r.Context(), UserKey, user))
a.logger.
Info(
"user recognized",
slog.Uint64("userid", uint64(token.UserID)),
slog.String("username", token.Username),
)
next(w, r)
}
}
func GetUserFromCtx(r *http.Request) *repository.User {
tokenValue := r.Context().Value(UserKey)
if token, ok := tokenValue.(*repository.User); ok {
return token
}
return nil
}
type InitialSetupMiddleware struct {
userRepository repository.UserRepository
}
func NewInitialSetupMiddleware(userRepository repository.UserRepository) *InitialSetupMiddleware {
return &InitialSetupMiddleware{
userRepository: userRepository,
}
}
func (i *InitialSetupMiddleware) Check(next http.HandlerFunc) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
// if user has been set to context it is logged in already
token := GetUserFromCtx(r)
if token != nil {
next(w, r)
return
}
path := r.URL.Path
if path == "/initial" {
next(w, r)
return
}
exists, err := i.userRepository.Any(r.Context())
if err != nil {
InternalServerError(w, err)
return
}
if exists {
next(w, r)
return
}
http.Redirect(w, r, "/initial", http.StatusTemporaryRedirect)
}
}
|
