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// 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 ui // import "miniflux.app/ui"
import (
"context"
"errors"
"net/http"
"miniflux.app/config"
"miniflux.app/http/cookie"
"miniflux.app/http/request"
"miniflux.app/http/response/html"
"miniflux.app/http/route"
"miniflux.app/logger"
"miniflux.app/model"
"miniflux.app/storage"
"github.com/gorilla/mux"
)
type middleware struct {
router *mux.Router
store *storage.Storage
}
func newMiddleware(router *mux.Router, store *storage.Storage) *middleware {
return &middleware{router, store}
}
func (m *middleware) handleUserSession(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
session := m.getUserSessionFromCookie(r)
if session == nil {
if m.isPublicRoute(r) {
next.ServeHTTP(w, r)
} else {
logger.Debug("[UI:UserSession] Session not found, redirect to login page")
html.Redirect(w, r, route.Path(m.router, "login"))
}
} else {
logger.Debug("[UI:UserSession] %s", session)
ctx := r.Context()
ctx = context.WithValue(ctx, request.UserIDContextKey, session.UserID)
ctx = context.WithValue(ctx, request.IsAuthenticatedContextKey, true)
ctx = context.WithValue(ctx, request.UserSessionTokenContextKey, session.Token)
next.ServeHTTP(w, r.WithContext(ctx))
}
})
}
func (m *middleware) handleAppSession(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
var err error
session := m.getAppSessionValueFromCookie(r)
if session == nil {
if request.IsAuthenticated(r) {
userID := request.UserID(r)
logger.Debug("[UI:AppSession] Cookie expired but user #%d is logged: creating a new session", userID)
session, err = m.store.CreateAppSessionWithUserPrefs(userID)
if err != nil {
html.ServerError(w, r, err)
return
}
} else {
logger.Debug("[UI:AppSession] Session not found, creating a new one")
session, err = m.store.CreateAppSession()
if err != nil {
html.ServerError(w, r, err)
return
}
}
http.SetCookie(w, cookie.New(cookie.CookieAppSessionID, session.ID, config.Opts.HTTPS, config.Opts.BasePath()))
} else {
logger.Debug("[UI:AppSession] %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(`[UI:AppSession] Invalid or missing CSRF token: Form="%s", Header="%s"`, formValue, headerValue)
html.BadRequest(w, r, errors.New("Invalid or missing CSRF"))
return
}
}
ctx := r.Context()
ctx = context.WithValue(ctx, request.SessionIDContextKey, session.ID)
ctx = context.WithValue(ctx, request.CSRFContextKey, session.Data.CSRF)
ctx = context.WithValue(ctx, request.OAuth2StateContextKey, session.Data.OAuth2State)
ctx = context.WithValue(ctx, request.FlashMessageContextKey, session.Data.FlashMessage)
ctx = context.WithValue(ctx, request.FlashErrorMessageContextKey, session.Data.FlashErrorMessage)
ctx = context.WithValue(ctx, request.UserLanguageContextKey, session.Data.Language)
ctx = context.WithValue(ctx, request.UserThemeContextKey, session.Data.Theme)
ctx = context.WithValue(ctx, request.PocketRequestTokenContextKey, session.Data.PocketRequestToken)
next.ServeHTTP(w, r.WithContext(ctx))
})
}
func (m *middleware) getAppSessionValueFromCookie(r *http.Request) *model.Session {
cookieValue := request.CookieValue(r, cookie.CookieAppSessionID)
if cookieValue == "" {
return nil
}
session, err := m.store.AppSession(cookieValue)
if err != nil {
logger.Error("[UI:AppSession] %v", err)
return nil
}
return session
}
func (m *middleware) isPublicRoute(r *http.Request) bool {
route := mux.CurrentRoute(r)
switch route.GetName() {
case "login",
"checkLogin",
"stylesheet",
"javascript",
"oauth2Redirect",
"oauth2Callback",
"appIcon",
"favicon",
"webManifest",
"robots",
"healthcheck":
return true
default:
return false
}
}
func (m *middleware) getUserSessionFromCookie(r *http.Request) *model.UserSession {
cookieValue := request.CookieValue(r, cookie.CookieUserSessionID)
if cookieValue == "" {
return nil
}
session, err := m.store.UserSessionByToken(cookieValue)
if err != nil {
logger.Error("[UI:UserSession] %v", err)
return nil
}
return session
}
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