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auth_middleware.go
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/
auth_middleware.go
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// SPDX-License-Identifier: AGPL-3.0-only
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, version 3.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>
package handler
import (
"context"
"errors"
"net"
"sync"
"github.com/gofiber/fiber/v2"
"github.com/gofiber/fiber/v2/utils"
"go.uber.org/zap"
"github.com/bangumi/server/internal/domain"
"github.com/bangumi/server/internal/errgo"
"github.com/bangumi/server/internal/logger/log"
"github.com/bangumi/server/internal/strutil"
"github.com/bangumi/server/internal/web/handler/ctxkey"
"github.com/bangumi/server/internal/web/res"
"github.com/bangumi/server/internal/web/res/code"
"github.com/bangumi/server/internal/web/session"
"github.com/bangumi/server/internal/web/util"
)
const headerCFRay = "Cf-Ray"
var accessorPool = sync.Pool{New: func() interface{} { return &accessor{} }} //nolint:gochecknoglobals
func (h Handler) SessionAuthMiddleware(c *fiber.Ctx) error {
var a = accessorPool.Get().(*accessor) //nolint:forcetypeassert
defer accessorPool.Put(a)
a.fillBasicInfo(c)
value := utils.UnsafeString(c.Context().Request.Header.Cookie(session.Key))
if value != "" {
s, err := h.getSession(c.Context(), value)
if err != nil {
if errors.Is(err, session.ErrExpired) {
return res.HTTPError(c, code.Unauthorized, "token expired")
}
h.log.Error("get session", zap.Error(err), a.LogRequestID())
return res.InternalError(c, err, "failed to read session")
}
auth, err := h.a.GetByIDWithCache(c.Context(), s.UserID)
if err != nil {
h.log.Error("failed to get permission", zap.Error(err), a.LogRequestID(), log.UserID(s.UserID))
return res.InternalError(c, err, "failed to get permission of user group")
}
a.fillAuth(auth)
}
c.Context().SetUserValue(ctxkey.User, a)
return c.Next()
}
func (h Handler) getSession(ctx context.Context, value string) (session.Session, error) {
s, err := h.session.Get(ctx, value)
if err != nil {
return session.Session{}, errgo.Wrap(err, "sessionManager.Get")
}
return s, nil
}
func (h Handler) AccessTokenAuthMiddleware(ctx *fiber.Ctx) error {
var a = accessorPool.Get().(*accessor) //nolint:forcetypeassert
defer accessorPool.Put(a)
a.fillBasicInfo(ctx)
authorization := ctx.Get(fiber.HeaderAuthorization)
if authorization != "" {
key, token := strutil.Partition(authorization, ' ')
if key != "Bearer" {
return res.HTTPError(ctx, fiber.StatusUnauthorized, "http Authorization header has wrong scope")
}
var auth domain.Auth
var err error
if auth, err = h.a.GetByTokenWithCache(ctx.Context(), token); err != nil {
if errors.Is(err, domain.ErrNotFound) {
return res.HTTPError(ctx, fiber.StatusUnauthorized, "access token has been expired or doesn't exist")
}
return errgo.Wrap(err, "auth.GetByTokenWithCache")
}
a.fillAuth(auth)
}
ctx.Context().SetUserValue(ctxkey.User, a)
return ctx.Next()
}
func (h Handler) getHTTPAccessor(c *fiber.Ctx) *accessor {
u, ok := c.Context().UserValue(ctxkey.User).(*accessor) // get visitor
if !ok {
panic("can't convert type")
}
return u
}
type accessor struct {
cfRay string
ip net.IP
domain.Auth
login bool
}
func (a *accessor) AllowNSFW() bool {
return a.login && a.Auth.AllowNSFW()
}
func (a *accessor) fillBasicInfo(c *fiber.Ctx) {
a.login = false
a.cfRay = c.Get(headerCFRay)
a.ip = util.RequestIP(c)
}
func (a *accessor) fillAuth(auth domain.Auth) {
a.Auth = auth
a.login = true
}
func (a accessor) LogRequestID() zap.Field {
return zap.String("request_id", a.cfRay)
}