diff --git a/internal/routers/api/attachment.go b/internal/routers/api/attachment.go
index 6ff07630..447058f6 100644
--- a/internal/routers/api/attachment.go
+++ b/internal/routers/api/attachment.go
@@ -53,6 +53,21 @@ func GetImageSize(img image.Rectangle) (int, int) {
 	return width, height
 }
 
+func fileCheck(uploadType string, size int64) error {
+	if uploadType != "public/video" &&
+		uploadType != "public/image" &&
+		uploadType != "public/avatar" &&
+		uploadType != "attachment" {
+		return errcode.InvalidParams
+	}
+
+	if size > 1024*1024*100 {
+		return errcode.FileInvalidSize.WithDetails("最大允许100MB")
+	}
+
+	return nil
+}
+
 func UploadAttachment(c *gin.Context) {
 	response := app.NewResponse(c)
 	svc := service.New(c)
@@ -66,16 +81,9 @@ func UploadAttachment(c *gin.Context) {
 	}
 	defer file.Close()
 
-	if uploadType != "public/video" &&
-		uploadType != "public/image" &&
-		uploadType != "public/avatar" &&
-		uploadType != "attachment" {
-		response.ToErrorResponse(errcode.InvalidParams)
-		return
-	}
-
-	if fileHeader.Size > 1024*1024*100 {
-		response.ToErrorResponse(errcode.FileInvalidSize.WithDetails("最大允许100MB"))
+	if err = fileCheck(uploadType, fileHeader.Size); err != nil {
+		cErr, _ := err.(*errcode.Error)
+		response.ToErrorResponse(cErr)
 		return
 	}
 
@@ -129,20 +137,21 @@ func UploadAttachment(c *gin.Context) {
 		attachment.UserID = userID.(int64)
 	}
 
-	if uploadType == "public/image" || uploadType == "public/avatar" {
-		attachment.Type = model.ATTACHMENT_TYPE_IMAGE
+	var uploadAttachmentTypeMap = map[string]model.AttachmentType{
+		"public/image":  model.ATTACHMENT_TYPE_IMAGE,
+		"public/avatar": model.ATTACHMENT_TYPE_IMAGE,
+		"public/video":  model.ATTACHMENT_TYPE_VIDEO,
+		"attachment":    model.ATTACHMENT_TYPE_OTHER,
+	}
 
-		src, err := imaging.Decode(file)
+	attachment.Type = uploadAttachmentTypeMap[uploadType]
+	if attachment.Type == model.ATTACHMENT_TYPE_IMAGE {
+		var src image.Image
+		src, err = imaging.Decode(file)
 		if err == nil {
 			attachment.ImgWidth, attachment.ImgHeight = GetImageSize(src.Bounds())
 		}
 	}
-	if uploadType == "public/video" {
-		attachment.Type = model.ATTACHMENT_TYPE_VIDEO
-	}
-	if uploadType == "attachment" {
-		attachment.Type = model.ATTACHMENT_TYPE_OTHER
-	}
 
 	attachment, err = svc.CreateAttachment(attachment)
 	if err != nil {
diff --git a/internal/service/comment.go b/internal/service/comment.go
index cf5bd84b..7986212d 100644
--- a/internal/service/comment.go
+++ b/internal/service/comment.go
@@ -186,21 +186,21 @@ func (svc *Service) DeletePostComment(comment *model.Comment) error {
 	return svc.dao.DeleteComment(comment)
 }
 
-func (svc *Service) CreatePostCommentReply(commentID int64, content string, userID, atUserID int64) (*model.CommentReply, error) {
+func (svc *Service) createPostPreHandler(commentID int64, userID, atUserID int64) (*model.Post, *model.Comment, error) {
 	// 加载Comment
 	comment, err := svc.dao.GetCommentByID(commentID)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 
 	// 加载comment的post
 	post, err := svc.dao.GetPostByID(comment.PostID)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 
 	if post.CommentCount >= global.AppSetting.MaxCommentCount {
-		return nil, errcode.MaxCommentCount
+		return nil, nil, errcode.MaxCommentCount
 	}
 
 	if userID == atUserID {
@@ -215,6 +215,15 @@ func (svc *Service) CreatePostCommentReply(commentID int64, content string, user
 		}
 	}
 
+	return post, comment, nil
+}
+
+func (svc *Service) CreatePostCommentReply(commentID int64, content string, userID, atUserID int64) (*model.CommentReply, error) {
+	var post, comment, err = svc.createPostPreHandler(commentID, userID, atUserID)
+	if err != nil {
+		return nil, err
+	}
+
 	// 创建评论
 	ip := svc.ctx.ClientIP()
 	reply := &model.CommentReply{
diff --git a/internal/service/post.go b/internal/service/post.go
index 00dec7d1..c93c37b4 100644
--- a/internal/service/post.go
+++ b/internal/service/post.go
@@ -57,6 +57,25 @@ type PostContentItem struct {
 	Sort    int64              `json:"sort"  binding:"required"`
 }
 
+// Check 检查PostContentItem属性
+func (p *PostContentItem) Check() error {
+	// 检查附件是否是本站资源
+	if p.Type == model.CONTENT_TYPE_IMAGE || p.Type == model.CONTENT_TYPE_VIDEO || p.Type == model.
+		CONTENT_TYPE_ATTACHMENT {
+		if strings.Index(p.Content, "https://"+global.AliossSetting.AliossDomain) != 0 {
+			return fmt.Errorf("附件非本站资源")
+		}
+	}
+	// 检查链接是否合法
+	if p.Type == model.CONTENT_TYPE_LINK {
+		if strings.Index(p.Content, "http://") != 0 && strings.Index(p.Content, "https://") != 0 {
+			return fmt.Errorf("链接不合法")
+		}
+	}
+
+	return nil
+}
+
 func (svc *Service) CreatePost(userID int64, param PostCreationReq) (*model.Post, error) {
 	ip := svc.ctx.ClientIP()
 
@@ -82,18 +101,9 @@ func (svc *Service) CreatePost(userID int64, param PostCreationReq) (*model.Post
 	}
 
 	for _, item := range param.Contents {
-
-		// 检查附件是否是本站资源
-		if item.Type == model.CONTENT_TYPE_IMAGE || item.Type == model.CONTENT_TYPE_VIDEO || item.Type == model.CONTENT_TYPE_ATTACHMENT {
-			if strings.Index(item.Content, "https://"+global.AliossSetting.AliossDomain) != 0 {
-				continue
-			}
-		}
-		// 检查链接是否合法
-		if item.Type == model.CONTENT_TYPE_LINK {
-			if strings.Index(item.Content, "http://") != 0 && strings.Index(item.Content, "https://") != 0 {
-				continue
-			}
+		if err = item.Check(); err != nil {
+			// 属性非法
+			continue
 		}
 
 		if item.Type == model.CONTENT_TYPE_ATTACHMENT && param.AttachmentPrice > 0 {