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security/auth_middleware.go

@@ -0,0 +1,51 @@
+package security
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+const (
+	ContextAuthTokenKey  = "authToken"
+	ContextSessionExpiry = "authSessionExpiry"
+)
+
+// AuthMiddleware enforces authentication on protected routes.
+func AuthMiddleware(manager *AuthManager) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		token := extractTokenFromRequest(c)
+		session, ok := manager.ValidateToken(token)
+		if !ok {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{
+				"error": "未授权访问，请先登录",
+			})
+			return
+		}
+
+		c.Set(ContextAuthTokenKey, session.Token)
+		c.Set(ContextSessionExpiry, session.ExpiresAt)
+		c.Next()
+	}
+}
+
+func extractTokenFromRequest(c *gin.Context) string {
+	authHeader := c.GetHeader("Authorization")
+	if authHeader != "" {
+		if len(authHeader) > 7 && strings.EqualFold(authHeader[0:7], "Bearer ") {
+			return strings.TrimSpace(authHeader[7:])
+		}
+		return strings.TrimSpace(authHeader)
+	}
+
+	if token := c.Query("token"); token != "" {
+		return strings.TrimSpace(token)
+	}
+
+	if cookie, err := c.Cookie("auth_token"); err == nil {
+		return strings.TrimSpace(cookie)
+	}
+
+	return ""
+}