feat: auth middleware

internal/middleware/auth.go

@@ -0,0 +1,53 @@
+package middleware
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"strings"
+
+	"gitea.local/admin/hspguard/internal/auth"
+	"gitea.local/admin/hspguard/internal/types"
+	"gitea.local/admin/hspguard/internal/web"
+)
+
+func AuthMiddleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		authHeader := r.Header.Get("Authorization")
+		if authHeader == "" {
+			web.Error(w, "unauthorized", http.StatusUnauthorized)
+			return
+		}
+
+		parts := strings.Split(authHeader, "Bearer ")
+		if len(parts) != 2 {
+			web.Error(w, "invalid auth header format", http.StatusUnauthorized)
+			return
+		}
+
+		tokenStr := parts[1]
+        token, userClaims, err := auth.VerifyToken(tokenStr)
+        if err != nil || !token.Valid {
+			http.Error(w, fmt.Sprintf("invalid token: %v", err), http.StatusUnauthorized)
+            return
+        }
+
+		ctx := context.WithValue(r.Context(), types.UserIdKey, userClaims.UserID)
+		next.ServeHTTP(w, r.WithContext(ctx))
+	})
+}
+
+func WithSkipper(mw func(http.Handler) http.Handler, excludedPaths ...string) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			for _, path := range excludedPaths {
+				if strings.HasPrefix(r.URL.Path, path) {
+					next.ServeHTTP(w, r)
+					return
+				}
+			}
+			mw(next).ServeHTTP(w, r)
+		})
+	}
+}
+