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login.go
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login.go
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// Copyright 2023 igevin
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package middleware
import (
"encoding/gob"
"github.com/gin-contrib/sessions"
"github.com/gin-gonic/gin"
"net/http"
"time"
)
type LoginMiddlewareBuilder struct {
paths []string
}
func NewLoginMiddlewareBuilder() *LoginMiddlewareBuilder {
return &LoginMiddlewareBuilder{}
}
func (l *LoginMiddlewareBuilder) IgnorePaths(paths ...string) *LoginMiddlewareBuilder {
for _, path := range paths {
l.paths = append(l.paths, path)
}
return l
}
func (l *LoginMiddlewareBuilder) Build() gin.HandlerFunc {
gob.Register(time.Now())
return func(ctx *gin.Context) {
for _, path := range l.paths {
if ctx.Request.URL.Path == path {
return
}
}
sess := sessions.Default(ctx)
id := sess.Get("userId")
if id == nil {
ctx.AbortWithStatus(http.StatusUnauthorized)
return
}
refreshSession := func() {
updateTime := sess.Get("update_time")
now := time.Now()
needUpdate := func(updateTime any, now time.Time) bool {
if updateTime == nil {
return true
}
updateTimeVal, _ := updateTime.(time.Time)
if now.Sub(updateTimeVal) > time.Second*5 {
return true
}
return false
}(updateTime, now)
if needUpdate {
sess.Set("updateTime", now)
sess.Set("userId", id)
sess.Options(sessions.Options{
MaxAge: 15,
})
if err := sess.Save(); err != nil {
panic(err)
}
}
}
refreshSession()
}
}