83 lines
1.8 KiB
Go
83 lines
1.8 KiB
Go
package middleware
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import (
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"net/http"
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"strings"
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"time"
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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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const (
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jwtSecret = "lmvpn-jwt-secret-key-2024"
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tokenExpire = 24 * time.Hour
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)
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type Claims struct {
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UserID uint `json:"user_id"`
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Username string `json:"username"`
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Role string `json:"role"`
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jwt.RegisteredClaims
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}
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func GenerateToken(userID uint, username, role string) (string, error) {
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claims := Claims{
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UserID: userID,
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Username: username,
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Role: role,
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RegisteredClaims: jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(time.Now().Add(tokenExpire)),
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IssuedAt: jwt.NewNumericDate(time.Now()),
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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([]byte(jwtSecret))
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}
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func ParseToken(tokenStr string) (*Claims, error) {
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token, err := jwt.ParseWithClaims(tokenStr, &Claims{}, func(token *jwt.Token) (interface{}, error) {
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return []byte(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.(*Claims); ok && token.Valid {
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return claims, nil
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}
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return nil, jwt.ErrSignatureInvalid
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}
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func AuthMiddleware() gin.HandlerFunc {
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return func(c *gin.Context) {
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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": "未提供认证令牌"})
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c.Abort()
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return
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}
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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": "认证格式错误"})
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c.Abort()
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return
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}
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claims, err := ParseToken(parts[1])
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if err != nil {
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c.JSON(http.StatusUnauthorized, gin.H{"error": "令牌无效或已过期"})
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c.Abort()
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return
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}
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c.Set("user_id", claims.UserID)
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c.Set("username", claims.Username)
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c.Set("role", claims.Role)
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c.Next()
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}
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}
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