chore: initial commit

internal/middleware/auth.go

@@ -0,0 +1,101 @@
+package middleware
+
+import (
+	"context"
+	"net/http"
+	db "server/internal/db/sqlc"
+	"server/internal/pkg/cache"
+	"server/internal/pkg/errs"
+	"server/internal/pkg/httputil"
+	"strings"
+
+	"github.com/go-chi/chi/v5"
+)
+
+const (
+	IsAdminKey contextKey = "is_admin"
+)
+
+type AuthMiddleware struct {
+	queries *db.Queries
+	cache   *cache.Caches
+}
+
+func NewAuthMiddleware(queries *db.Queries, cache *cache.Caches) *AuthMiddleware {
+	return &AuthMiddleware{
+		cache:   cache,
+		queries: queries,
+	}
+}
+
+func (m *AuthMiddleware) Middleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		ctx := r.Context()
+
+		claims, ok := GetClaims(ctx)
+		if !ok || claims.UserID == 0 {
+			httputil.Fail(w, errs.ErrUnauthorized)
+			return
+		}
+
+		// 判断是否有管理员权限 目前只判断uid是否为1
+		isAdmin := userIsAdmin(claims.UserID)
+
+		if isAdmin {
+			ctx = context.WithValue(ctx, IsAdminKey, isAdmin)
+			next.ServeHTTP(w, r.WithContext(ctx))
+			return
+		}
+
+		hasPermission, err := userHasApiPermission(ctx, r, m.queries, claims.UserID, m.cache)
+		if err != nil {
+			httputil.Fail(w, err)
+			return
+		}
+
+		if !hasPermission {
+			httputil.Fail(w, errs.ErrPermissionDenied)
+			return
+		}
+
+		next.ServeHTTP(w, r)
+	})
+}
+
+func userIsAdmin(uid int32) bool {
+	if uid == 1 {
+		return true
+	}
+
+	return false
+}
+
+func userHasApiPermission(ctx context.Context, r *http.Request, queries *db.Queries, uid int32, cache *cache.Caches) (bool, error) {
+	var (
+		apis []db.GetSysUserApisRow
+		err  error
+	)
+
+	apis, ok := cache.SysUserApisCache.GetIfPresent(uid)
+
+	if !ok {
+		apis, err = queries.GetSysUserApis(ctx, uid)
+
+		if err != nil {
+			return false, err
+		}
+		cache.SysUserApisCache.Set(uid, apis)
+	}
+
+	requestPath := chi.RouteContext(r.Context()).RoutePattern()
+	requestPath = strings.TrimPrefix(requestPath, "/api")
+	requestMethod := r.Method
+
+	for _, api := range apis {
+		if api.Path == requestPath && api.Method == requestMethod {
+			return true, nil
+		}
+	}
+
+	return false, nil
+}