91 lines
2.4 KiB
Go
91 lines
2.4 KiB
Go
package jwt
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import (
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"errors"
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"fmt"
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"net/http"
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"strings"
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"time"
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"go_blog/models"
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"github.com/gin-gonic/gin"
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"github.com/golang-jwt/jwt/v5"
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)
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// 定义 JWT 密钥（从配置文件读取）
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// var jwtSecret = []byte(config.GetJWTSecret())
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var jwtSecret = []byte("your-hardcoded-secret-key")
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// CustomClaims 自定义 JWT 载荷（包含用户 ID）
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type CustomClaims struct {
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UserID uint `json:"user_id"`
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jwt.RegisteredClaims
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}
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// GenerateToken 生成 JWT 令牌
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func GenerateToken(user *models.Account) (string, error) {
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expiresAt := jwt.NewNumericDate(time.Now().Add(24 * time.Hour)) // 令牌有效期 24 小时
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claims := CustomClaims{
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UserID: uint(user.ID),
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RegisteredClaims: jwt.RegisteredClaims{
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ExpiresAt: expiresAt,
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Issuer: "go_blog",
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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(jwtSecret)
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}
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// VerifyToken 验证 JWT 令牌并返回用户信息
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func VerifyToken(tokenStr string) (*models.Account, error) { // 修改返回类型为 *models.Account
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token, err := jwt.ParseWithClaims(tokenStr, &CustomClaims{}, func(token *jwt.Token) (interface{}, error) {
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if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
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}
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return jwtSecret, 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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if claims, ok := token.Claims.(*CustomClaims); ok && token.Valid {
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return models.GetAccountByID(claims.UserID) // 假设 models 包新增 GetAccountByID 方法
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}
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return nil, errors.New("invalid token")
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}
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// AuthRequired Gin 中间件：验证 JWT 令牌
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func AuthRequired() gin.HandlerFunc {
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return func(c *gin.Context) {
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// 从请求头获取 Authorization 字段（格式：Bearer <token>）
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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": "请提供认证令牌"})
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c.Abort()
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return
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}
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// 解析令牌
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parts := strings.SplitN(authHeader, " ", 2)
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if len(parts) != 2 || parts[0] != "Bearer" {
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c.JSON(http.StatusUnauthorized, gin.H{"error": "令牌格式错误（应为 Bearer <token>）"})
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c.Abort()
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return
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}
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// 验证令牌并获取用户
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user, err := VerifyToken(parts[1])
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if err != nil {
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c.JSON(http.StatusUnauthorized, gin.H{"error": "无效或过期的令牌: " + err.Error()})
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c.Abort()
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return
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}
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// 将用户信息存入上下文（后续路由可通过 c.Get("user") 获取）
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c.Set("user", user)
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c.Next()
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}
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}
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