From f6ac7117b1023b99e6c2e965353870ff0707500f Mon Sep 17 00:00:00 2001
From: 2980736041 <2980736041@qq.com>
Date: Sat, 8 Aug 2026 14:22:20 +0800
Subject: [PATCH] Add placeholders to empty files and fix the error "failed to
 upload 2C with http status: 400, body: Bad Request"

---
 server/webdav/webdav.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/server/webdav/webdav.go b/server/webdav/webdav.go
index df1d2045140..4ed77c97f26 100644
--- a/server/webdav/webdav.go
+++ b/server/webdav/webdav.go
@@ -6,9 +6,11 @@
 package webdav // import "golang.org/x/net/webdav"
 
 import (
+	"bytes"
 	"context"
 	"errors"
 	"fmt"
+	"io"
 	"net/http"
 	"net/url"
 	"os"
@@ -308,6 +310,12 @@ func (h *Handler) handlePut(w http.ResponseWriter, r *http.Request) (status int,
 	if reqPath == "" {
 		return http.StatusMethodNotAllowed, nil
 	}
+
+	if r.ContentLength == 0 {
+		r.Body = io.NopCloser(bytes.NewReader([]byte("\n")))
+		r.ContentLength = 1
+	}
+
 	release, status, err := h.confirmLocks(r, reqPath, "")
 	if err != nil {
 		return status, err