fix attachment file size limit in server backend (#35519) (#35720)

Backport #35519 by @a1012112796

fix #35512

Co-authored-by: a1012112796 <1012112796@qq.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

routers/web/repo/attachment.go

@@ -45,7 +45,8 @@ func uploadAttachment(ctx *context.Context, repoID int64, allowedTypes string) {
 	}
 	defer file.Close()
 
-	attach, err := attachment.UploadAttachment(ctx, file, allowedTypes, header.Size, &repo_model.Attachment{
+	uploaderFile := attachment.NewLimitedUploaderKnownSize(file, header.Size)
+	attach, err := attachment.UploadAttachmentGeneralSizeLimit(ctx, uploaderFile, allowedTypes, &repo_model.Attachment{
 		Name:       header.Filename,
 		UploaderID: ctx.Doer.ID,
 		RepoID:     repoID,

routers/web/repo/editor_uploader.go

@@ -41,6 +41,8 @@ func UploadFileToServer(ctx *context.Context) {
 		return
 	}
 
+	// FIXME: need to check the file size according to setting.Repository.Upload.FileMaxSize
+
 	uploaded, err := repo_model.NewUpload(ctx, name, buf, file)
 	if err != nil {
 		ctx.ServerError("NewUpload", err)