Session management refactoring

server/middleware/user_session.go

@@ -0,0 +1,78 @@
+// Copyright 2017 Frédéric Guillot. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package middleware
+
+import (
+	"context"
+	"net/http"
+
+	"github.com/miniflux/miniflux/logger"
+	"github.com/miniflux/miniflux/model"
+	"github.com/miniflux/miniflux/server/cookie"
+	"github.com/miniflux/miniflux/server/route"
+	"github.com/miniflux/miniflux/storage"
+
+	"github.com/gorilla/mux"
+)
+
+// UserSessionMiddleware represents a user session middleware.
+type UserSessionMiddleware struct {
+	store  *storage.Storage
+	router *mux.Router
+}
+
+// Handler execute the middleware.
+func (s *UserSessionMiddleware) Handler(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		session := s.getSessionFromCookie(r)
+
+		if session == nil {
+			logger.Debug("[Middleware:UserSession] Session not found")
+			if s.isPublicRoute(r) {
+				next.ServeHTTP(w, r)
+			} else {
+				http.Redirect(w, r, route.Path(s.router, "login"), http.StatusFound)
+			}
+		} else {
+			logger.Debug("[Middleware:UserSession] %s", session)
+			ctx := r.Context()
+			ctx = context.WithValue(ctx, UserIDContextKey, session.UserID)
+			ctx = context.WithValue(ctx, IsAuthenticatedContextKey, true)
+			ctx = context.WithValue(ctx, UserSessionTokenContextKey, session.Token)
+
+			next.ServeHTTP(w, r.WithContext(ctx))
+		}
+	})
+}
+
+func (s *UserSessionMiddleware) isPublicRoute(r *http.Request) bool {
+	route := mux.CurrentRoute(r)
+	switch route.GetName() {
+	case "login", "checkLogin", "stylesheet", "javascript", "oauth2Redirect", "oauth2Callback", "appIcon", "favicon":
+		return true
+	default:
+		return false
+	}
+}
+
+func (s *UserSessionMiddleware) getSessionFromCookie(r *http.Request) *model.UserSession {
+	sessionCookie, err := r.Cookie(cookie.CookieUserSessionID)
+	if err == http.ErrNoCookie {
+		return nil
+	}
+
+	session, err := s.store.UserSessionByToken(sessionCookie.Value)
+	if err != nil {
+		logger.Error("[Middleware:UserSession] %v", err)
+		return nil
+	}
+
+	return session
+}
+
+// NewUserSessionMiddleware returns a new UserSessionMiddleware.
+func NewUserSessionMiddleware(s *storage.Storage, r *mux.Router) *UserSessionMiddleware {
+	return &UserSessionMiddleware{store: s, router: r}
+}