1 files changed, 72 insertions, 0 deletions
diff --git a/middleware/app_session.go b/middleware/app_session.go
new file mode 100644
index 0000000..525cd66
--- /dev/null
+++ b/middleware/app_session.go
@@ -0,0 +1,72 @@
+// Copyright 2018 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/http/cookie"
+	"github.com/miniflux/miniflux/logger"
+	"github.com/miniflux/miniflux/model"
+)
+
+// AppSession handles application session middleware.
+func (m *Middleware) AppSession(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		var err error
+		session := m.getSessionValueFromCookie(r)
+
+		if session == nil {
+			logger.Debug("[Middleware:Session] Session not found")
+			session, err = m.store.CreateSession()
+			if err != nil {
+				logger.Error("[Middleware:Session] %v", err)
+				http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
+				return
+			}
+
+			http.SetCookie(w, cookie.New(cookie.CookieSessionID, session.ID, m.cfg.IsHTTPS, m.cfg.BasePath()))
+		} else {
+			logger.Debug("[Middleware:Session] %s", session)
+		}
+
+		if r.Method == "POST" {
+			formValue := r.FormValue("csrf")
+			headerValue := r.Header.Get("X-Csrf-Token")
+
+			if session.Data.CSRF != formValue && session.Data.CSRF != headerValue {
+				logger.Error(`[Middleware:Session] Invalid or missing CSRF token: Form="%s", Header="%s"`, formValue, headerValue)
+				w.WriteHeader(http.StatusBadRequest)
+				w.Write([]byte("Invalid or missing CSRF session!"))
+				return
+			}
+		}
+
+		ctx := r.Context()
+		ctx = context.WithValue(ctx, SessionIDContextKey, session.ID)
+		ctx = context.WithValue(ctx, CSRFContextKey, session.Data.CSRF)
+		ctx = context.WithValue(ctx, OAuth2StateContextKey, session.Data.OAuth2State)
+		ctx = context.WithValue(ctx, FlashMessageContextKey, session.Data.FlashMessage)
+		ctx = context.WithValue(ctx, FlashErrorMessageContextKey, session.Data.FlashErrorMessage)
+		ctx = context.WithValue(ctx, UserLanguageContextKey, session.Data.Language)
+		next.ServeHTTP(w, r.WithContext(ctx))
+	})
+}
+
+func (m *Middleware) getSessionValueFromCookie(r *http.Request) *model.Session {
+	sessionCookie, err := r.Cookie(cookie.CookieSessionID)
+	if err == http.ErrNoCookie {
+		return nil
+	}
+
+	session, err := m.store.Session(sessionCookie.Value)
+	if err != nil {
+		logger.Error("[Middleware:Session] %v", err)
+		return nil
+	}
+
+	return session
+}