u

code/allapp/allapp-go/utils/jwtx/jwt.go

@@ -0,0 +1,107 @@
+package jwtx
+
+import (
+	"allapp/conf"
+	"sync"
+	"time"
+
+	"github.com/golang-jwt/jwt/v4"
+)
+
+type CustomClaims struct {
+	UserID int64 `json:"user_id"`
+	jwt.RegisteredClaims
+}
+
+type TokenResult struct {
+	Claims    *CustomClaims
+	IsValid   bool
+	IsExpired bool
+}
+
+type jwtManager struct {
+	secret        string
+	accessExpiry  time.Duration
+	refreshExpiry time.Duration
+}
+
+var (
+	manager *jwtManager
+	once    sync.Once
+)
+
+// InitJwt 初始化全局 JWT 配置，只能调用一次
+func InitJwt() {
+	once.Do(func() {
+		manager = &jwtManager{
+			secret:        conf.GetConf().JWT.Secret,
+			accessExpiry:  conf.GetConf().JWT.AccessExpiry,
+			refreshExpiry: conf.GetConf().JWT.RefreshExpiry,
+		}
+	})
+}
+
+// CreateAccessToken 全局函数创建 Access Token
+func CreateAccessToken(userID int64) (string, error) {
+	return manager.createToken(userID, manager.accessExpiry)
+}
+
+// CreateRefreshToken 全局函数创建 Refresh Token
+func CreateRefreshToken(userID int64) (string, error) {
+	return manager.createToken(userID, manager.refreshExpiry)
+}
+
+// VerifyToken 全局函数验证 Token
+func VerifyToken(tokenString string) TokenResult {
+	result := TokenResult{IsValid: false, IsExpired: false}
+
+	if tokenString == "" || manager == nil {
+		return result
+	}
+
+	token, err := jwt.ParseWithClaims(tokenString, &CustomClaims{}, func(token *jwt.Token) (interface{}, error) {
+		return []byte(manager.secret), nil
+	})
+
+	if token == nil {
+		return result
+	}
+
+	claims, ok := token.Claims.(*CustomClaims)
+	if !ok {
+		return result
+	}
+
+	if err != nil || !token.Valid {
+		return result
+	}
+
+	result.Claims = claims
+	result.IsValid = true
+	if claims.ExpiresAt != nil && time.Now().After(claims.ExpiresAt.Time) {
+		result.IsExpired = true
+	}
+	return result
+}
+
+// 内部方法，生成 Token
+func (j *jwtManager) createToken(userID int64, expiry time.Duration) (string, error) {
+	claims := &CustomClaims{
+		UserID: userID,
+		RegisteredClaims: jwt.RegisteredClaims{
+			IssuedAt: jwt.NewNumericDate(time.Now()),
+		},
+	}
+
+	switch {
+	case expiry > 0:
+		claims.ExpiresAt = jwt.NewNumericDate(time.Now().Add(expiry))
+	case expiry == -1:
+		claims.ExpiresAt = nil // 永不过期
+	default:
+		claims.ExpiresAt = jwt.NewNumericDate(time.Now().Add(time.Hour))
+	}
+
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	return token.SignedString([]byte(j.secret))
+}