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wakapi/middlewares/authenticate.go
2021-02-06 23:02:35 +01:00

106 lines
2.5 KiB
Go

package middlewares
import (
"context"
"fmt"
conf "github.com/muety/wakapi/config"
"github.com/muety/wakapi/models"
"github.com/muety/wakapi/services"
"github.com/muety/wakapi/utils"
"net/http"
"strings"
)
type AuthenticateMiddleware struct {
config *conf.Config
userSrvc services.IUserService
optionalForPaths []string
}
func NewAuthenticateMiddleware(userService services.IUserService) *AuthenticateMiddleware {
return &AuthenticateMiddleware{
config: conf.Get(),
userSrvc: userService,
optionalForPaths: []string{},
}
}
func (m *AuthenticateMiddleware) WithOptionalFor(paths []string) *AuthenticateMiddleware {
m.optionalForPaths = paths
return m
}
func (m *AuthenticateMiddleware) Handler(h http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
m.ServeHTTP(w, r, h.ServeHTTP)
})
}
func (m *AuthenticateMiddleware) ServeHTTP(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
var user *models.User
user, err := m.tryGetUserByCookie(r)
if err != nil {
user, err = m.tryGetUserByApiKey(r)
}
if err != nil || user == nil {
if m.isOptional(r.URL.Path) {
next(w, r)
return
}
if strings.HasPrefix(r.URL.Path, "/api") {
w.WriteHeader(http.StatusUnauthorized)
} else {
http.SetCookie(w, m.config.GetClearCookie(models.AuthCookieKey, "/"))
http.Redirect(w, r, fmt.Sprintf("%s/?error=unauthorized", m.config.Server.BasePath), http.StatusFound)
}
return
}
ctx := context.WithValue(r.Context(), models.UserKey, user)
next(w, r.WithContext(ctx))
}
func (m *AuthenticateMiddleware) isOptional(requestPath string) bool {
for _, p := range m.optionalForPaths {
if strings.HasPrefix(requestPath, p) || requestPath == p {
return true
}
}
return false
}
func (m *AuthenticateMiddleware) tryGetUserByApiKey(r *http.Request) (*models.User, error) {
key, err := utils.ExtractBearerAuth(r)
if err != nil {
return nil, err
}
var user *models.User
userKey := strings.TrimSpace(key)
user, err = m.userSrvc.GetUserByKey(userKey)
if err != nil {
return nil, err
}
return user, nil
}
func (m *AuthenticateMiddleware) tryGetUserByCookie(r *http.Request) (*models.User, error) {
username, err := utils.ExtractCookieAuth(r, m.config)
if err != nil {
return nil, err
}
user, err := m.userSrvc.GetUserById(*username)
if err != nil {
return nil, err
}
// no need to check password here, as securecookie decoding will fail anyway,
// if cookie is not properly signed
return user, nil
}