From bca9664c864bb3be7364a98cc0ee266f63b82742 Mon Sep 17 00:00:00 2001
From: "453530270@qq.com" <aa123456>
Date: Thu, 27 Jun 2024 10:15:40 +0800
Subject: [PATCH] =?UTF-8?q?=E5=90=8C=E6=AD=A5=E7=9B=B8=E5=90=8C=E6=96=87?=
 =?UTF-8?q?=E4=BB=B6=E6=97=B6=E5=80=99=E5=A4=87=E4=BB=BD=E5=8E=9F=E6=9C=89?=
 =?UTF-8?q?=E6=96=87=E4=BB=B6?=
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---
 fsv2/handler/handler.go |  7 +++++++
 fsv2/util/util.go       | 30 ++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)

diff --git a/fsv2/handler/handler.go b/fsv2/handler/handler.go
index d82a721..ccad2ab 100644
--- a/fsv2/handler/handler.go
+++ b/fsv2/handler/handler.go
@@ -7,6 +7,7 @@ import (
 	"io"
 	"mime"
 	"strings"
+	"time"
 
 	"net/http"
 	"os"
@@ -109,6 +110,12 @@ func ReceiveHandler(w http.ResponseWriter, r *http.Request) {
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
+		// 检查文件是否存在
+		if util.IsFileExist(filename) {
+			// 文件重命名
+			dstfname := filename + "_backup_" + time.Now().Format("20060102150405")
+			os.Rename(filename, dstfname)
+		}
 
 		out, err := os.Create(nfname)
 		if err != nil {
diff --git a/fsv2/util/util.go b/fsv2/util/util.go
index c60db3e..191f9d3 100644
--- a/fsv2/util/util.go
+++ b/fsv2/util/util.go
@@ -172,6 +172,36 @@ func Base64dec(bsstr string) string {
 	return string(dedc)
 }
 
+// 文件备份
+func Filebackup(src, dst string) error {
+	in, err := os.Open(src)
+	if err != nil {
+		return err
+	}
+	defer in.Close()
+
+	out, err := os.Create(dst)
+	if err != nil {
+		return err
+	}
+	defer out.Close()
+
+	_, err = io.Copy(out, in)
+	if err != nil {
+		return err
+	}
+
+	return out.Sync()
+}
+
+// 判断文件是否存在
+func IsFileExist(filename string) bool {
+	if _, err := os.Stat(filename); err == nil {
+		return true
+	}
+	return false
+}
+
 // package main
 
 // import (