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|
package ext
import (
"context"
"encoding/base64"
"errors"
"net/http"
"time"
"github.com/sirupsen/logrus"
"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 LogMiddleware struct {
entry *logrus.Entry
}
func NewLogMiddleare(log *logrus.Entry) *LogMiddleware {
return &LogMiddleware{
entry: 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.entry.
WithField("time", elapsed).
WithField("path", r.URL.Path).
Info(r.Method)
}
}
type AuthMiddleware struct {
key []byte
entry *logrus.Entry
}
func NewAuthMiddleware(key []byte, log *logrus.Entry) *AuthMiddleware {
return &AuthMiddleware{
key: key,
entry: log.WithField("context", "auth"),
}
}
func (a *AuthMiddleware) LoggedIn(next http.HandlerFunc) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
path := string(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.entry.Info("No auth provided")
http.Redirect(w, r, redirectLogin, http.StatusTemporaryRedirect)
return
}
auth, err := base64.StdEncoding.DecodeString(authBase64.Value)
if err != nil {
a.entry.Error(err)
return
}
token, err := service.ReadToken(auth, a.key)
if err != nil {
a.entry.Error(err)
http.Redirect(w, r, redirectLogin, http.StatusTemporaryRedirect)
return
}
r = r.WithContext(context.WithValue(r.Context(), "token", token))
a.entry.
WithField("userID", token.UserID).
WithField("username", token.Username).
Info("user recognized")
next(w, r)
}
}
func GetTokenFromCtx(w http.ResponseWriter, r *http.Request) *service.Token {
tokenValue := r.Context().Value("token")
if token, ok := tokenValue.(*service.Token); 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 := GetTokenFromCtx(w, 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)
}
}
|
