149 lines
3.6 KiB
Go
149 lines
3.6 KiB
Go
// Package middleware 提供HTTP中间件功能
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// 包含鉴权、日志、恢复等中间件实现
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package middleware
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import (
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"net/http"
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"os"
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"strings"
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"time"
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"git.huangwc.com/pig/pig-farm-controller/internal/logs"
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"git.huangwc.com/pig/pig-farm-controller/internal/storage/repository"
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"github.com/gin-gonic/gin"
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"github.com/golang-jwt/jwt/v5"
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"gorm.io/gorm"
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)
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// AuthMiddleware 鉴权中间件结构
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type AuthMiddleware struct {
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userRepo repository.UserRepo
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logger *logs.Logger
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}
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// AuthUser 用于在上下文中存储的用户信息
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type AuthUser struct {
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ID uint `json:"id"`
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Username string `json:"username"`
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}
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// JWTClaims 自定义JWT声明
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type JWTClaims struct {
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UserID uint `json:"user_id"`
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Username string `json:"username"`
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jwt.RegisteredClaims
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}
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// NewAuthMiddleware 创建鉴权中间件实例
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func NewAuthMiddleware(userRepo repository.UserRepo) *AuthMiddleware {
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return &AuthMiddleware{
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userRepo: userRepo,
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logger: logs.NewLogger(),
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}
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}
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// getJWTSecret 获取JWT密钥
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func (m *AuthMiddleware) getJWTSecret() []byte {
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// 在实际项目中，应该从配置文件或环境变量中读取
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secret := os.Getenv("JWT_SECRET")
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if secret == "" {
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secret = "pig-farm-controller-secret-key" // 默认密钥
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}
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return []byte(secret)
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}
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// GenerateToken 为用户生成JWT token
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func (m *AuthMiddleware) GenerateToken(userID uint, username string) (string, error) {
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claims := JWTClaims{
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UserID: userID,
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Username: username,
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RegisteredClaims: jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(time.Now().Add(24 * time.Hour)), // 24小时过期
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IssuedAt: jwt.NewNumericDate(time.Now()),
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NotBefore: jwt.NewNumericDate(time.Now()),
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Issuer: "pig-farm-controller",
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},
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}
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token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
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return token.SignedString(m.getJWTSecret())
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}
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// Handle 鉴权中间件处理函数
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func (m *AuthMiddleware) Handle() gin.HandlerFunc {
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return func(c *gin.Context) {
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// 从请求头中获取认证信息
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authHeader := c.GetHeader("Authorization")
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if authHeader == "" {
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c.JSON(http.StatusUnauthorized, gin.H{"error": "缺少认证信息"})
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c.Abort()
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return
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}
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// 检查Bearer token格式
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if !strings.HasPrefix(authHeader, "Bearer ") {
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c.JSON(http.StatusUnauthorized, gin.H{"error": "认证信息格式错误"})
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c.Abort()
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return
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}
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// 解析token
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tokenString := strings.TrimPrefix(authHeader, "Bearer ")
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// 验证token并获取用户信息
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user, err := m.getUserFromJWT(tokenString)
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if err != nil {
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if err == gorm.ErrRecordNotFound {
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c.JSON(http.StatusUnauthorized, gin.H{"error": "用户不存在"})
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} else {
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m.logger.Error("Token验证失败: " + err.Error())
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c.JSON(http.StatusUnauthorized, gin.H{"error": "无效的认证令牌"})
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}
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c.Abort()
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return
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}
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// 将用户信息保存到上下文中，供后续处理函数使用
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c.Set("user", user)
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// 继续处理请求
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c.Next()
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}
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}
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// getUserFromJWT 从JWT token中获取用户信息
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func (m *AuthMiddleware) getUserFromJWT(tokenString string) (*AuthUser, error) {
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// 解析token
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token, err := jwt.ParseWithClaims(tokenString, &JWTClaims{}, func(token *jwt.Token) (interface{}, error) {
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return m.getJWTSecret(), nil
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})
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if err != nil {
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return nil, err
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}
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// 验证token
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if !token.Valid {
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return nil, gorm.ErrRecordNotFound
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}
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// 获取声明
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claims, ok := token.Claims.(*JWTClaims)
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if !ok {
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return nil, gorm.ErrRecordNotFound
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}
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// 根据用户ID查找用户
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userModel, err := m.userRepo.FindByID(claims.UserID)
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if err != nil {
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return nil, err
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}
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user := &AuthUser{
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ID: userModel.ID,
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Username: userModel.Username,
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}
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return user, nil
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}
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